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-rw-r--r--arch/x86/kvm/svm.c4461
1 files changed, 4461 insertions, 0 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
new file mode 100644
index 000000000..4911bf191
--- /dev/null
+++ b/arch/x86/kvm/svm.c
@@ -0,0 +1,4461 @@
+/*
+ * Kernel-based Virtual Machine driver for Linux
+ *
+ * AMD SVM support
+ *
+ * Copyright (C) 2006 Qumranet, Inc.
+ * Copyright 2010 Red Hat, Inc. and/or its affiliates.
+ *
+ * Authors:
+ * Yaniv Kamay <yaniv@qumranet.com>
+ * Avi Kivity <avi@qumranet.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ */
+#include <linux/kvm_host.h>
+
+#include "irq.h"
+#include "mmu.h"
+#include "kvm_cache_regs.h"
+#include "x86.h"
+#include "cpuid.h"
+
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/kernel.h>
+#include <linux/vmalloc.h>
+#include <linux/highmem.h>
+#include <linux/sched.h>
+#include <linux/ftrace_event.h>
+#include <linux/slab.h>
+
+#include <asm/perf_event.h>
+#include <asm/tlbflush.h>
+#include <asm/desc.h>
+#include <asm/debugreg.h>
+#include <asm/kvm_para.h>
+
+#include <asm/virtext.h>
+#include "trace.h"
+
+#define __ex(x) __kvm_handle_fault_on_reboot(x)
+
+MODULE_AUTHOR("Qumranet");
+MODULE_LICENSE("GPL");
+
+static const struct x86_cpu_id svm_cpu_id[] = {
+ X86_FEATURE_MATCH(X86_FEATURE_SVM),
+ {}
+};
+MODULE_DEVICE_TABLE(x86cpu, svm_cpu_id);
+
+#define IOPM_ALLOC_ORDER 2
+#define MSRPM_ALLOC_ORDER 1
+
+#define SEG_TYPE_LDT 2
+#define SEG_TYPE_BUSY_TSS16 3
+
+#define SVM_FEATURE_NPT (1 << 0)
+#define SVM_FEATURE_LBRV (1 << 1)
+#define SVM_FEATURE_SVML (1 << 2)
+#define SVM_FEATURE_NRIP (1 << 3)
+#define SVM_FEATURE_TSC_RATE (1 << 4)
+#define SVM_FEATURE_VMCB_CLEAN (1 << 5)
+#define SVM_FEATURE_FLUSH_ASID (1 << 6)
+#define SVM_FEATURE_DECODE_ASSIST (1 << 7)
+#define SVM_FEATURE_PAUSE_FILTER (1 << 10)
+
+#define NESTED_EXIT_HOST 0 /* Exit handled on host level */
+#define NESTED_EXIT_DONE 1 /* Exit caused nested vmexit */
+#define NESTED_EXIT_CONTINUE 2 /* Further checks needed */
+
+#define DEBUGCTL_RESERVED_BITS (~(0x3fULL))
+
+#define TSC_RATIO_RSVD 0xffffff0000000000ULL
+#define TSC_RATIO_MIN 0x0000000000000001ULL
+#define TSC_RATIO_MAX 0x000000ffffffffffULL
+
+static bool erratum_383_found __read_mostly;
+
+static const u32 host_save_user_msrs[] = {
+#ifdef CONFIG_X86_64
+ MSR_STAR, MSR_LSTAR, MSR_CSTAR, MSR_SYSCALL_MASK, MSR_KERNEL_GS_BASE,
+ MSR_FS_BASE,
+#endif
+ MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
+};
+
+#define NR_HOST_SAVE_USER_MSRS ARRAY_SIZE(host_save_user_msrs)
+
+struct kvm_vcpu;
+
+struct nested_state {
+ struct vmcb *hsave;
+ u64 hsave_msr;
+ u64 vm_cr_msr;
+ u64 vmcb;
+
+ /* These are the merged vectors */
+ u32 *msrpm;
+
+ /* gpa pointers to the real vectors */
+ u64 vmcb_msrpm;
+ u64 vmcb_iopm;
+
+ /* A VMEXIT is required but not yet emulated */
+ bool exit_required;
+
+ /* cache for intercepts of the guest */
+ u32 intercept_cr;
+ u32 intercept_dr;
+ u32 intercept_exceptions;
+ u64 intercept;
+
+ /* Nested Paging related state */
+ u64 nested_cr3;
+};
+
+#define MSRPM_OFFSETS 16
+static u32 msrpm_offsets[MSRPM_OFFSETS] __read_mostly;
+
+/*
+ * Set osvw_len to higher value when updated Revision Guides
+ * are published and we know what the new status bits are
+ */
+static uint64_t osvw_len = 4, osvw_status;
+
+struct vcpu_svm {
+ struct kvm_vcpu vcpu;
+ struct vmcb *vmcb;
+ unsigned long vmcb_pa;
+ struct svm_cpu_data *svm_data;
+ uint64_t asid_generation;
+ uint64_t sysenter_esp;
+ uint64_t sysenter_eip;
+
+ u64 next_rip;
+
+ u64 host_user_msrs[NR_HOST_SAVE_USER_MSRS];
+ struct {
+ u16 fs;
+ u16 gs;
+ u16 ldt;
+ u64 gs_base;
+ } host;
+
+ u32 *msrpm;
+
+ ulong nmi_iret_rip;
+
+ struct nested_state nested;
+
+ bool nmi_singlestep;
+
+ unsigned int3_injected;
+ unsigned long int3_rip;
+ u32 apf_reason;
+
+ u64 tsc_ratio;
+};
+
+static DEFINE_PER_CPU(u64, current_tsc_ratio);
+#define TSC_RATIO_DEFAULT 0x0100000000ULL
+
+#define MSR_INVALID 0xffffffffU
+
+static const struct svm_direct_access_msrs {
+ u32 index; /* Index of the MSR */
+ bool always; /* True if intercept is always on */
+} direct_access_msrs[] = {
+ { .index = MSR_STAR, .always = true },
+ { .index = MSR_IA32_SYSENTER_CS, .always = true },
+#ifdef CONFIG_X86_64
+ { .index = MSR_GS_BASE, .always = true },
+ { .index = MSR_FS_BASE, .always = true },
+ { .index = MSR_KERNEL_GS_BASE, .always = true },
+ { .index = MSR_LSTAR, .always = true },
+ { .index = MSR_CSTAR, .always = true },
+ { .index = MSR_SYSCALL_MASK, .always = true },
+#endif
+ { .index = MSR_IA32_LASTBRANCHFROMIP, .always = false },
+ { .index = MSR_IA32_LASTBRANCHTOIP, .always = false },
+ { .index = MSR_IA32_LASTINTFROMIP, .always = false },
+ { .index = MSR_IA32_LASTINTTOIP, .always = false },
+ { .index = MSR_INVALID, .always = false },
+};
+
+/* enable NPT for AMD64 and X86 with PAE */
+#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
+static bool npt_enabled = true;
+#else
+static bool npt_enabled;
+#endif
+
+/* allow nested paging (virtualized MMU) for all guests */
+static int npt = true;
+module_param(npt, int, S_IRUGO);
+
+/* allow nested virtualization in KVM/SVM */
+static int nested = true;
+module_param(nested, int, S_IRUGO);
+
+static void svm_flush_tlb(struct kvm_vcpu *vcpu);
+static void svm_complete_interrupts(struct vcpu_svm *svm);
+
+static int nested_svm_exit_handled(struct vcpu_svm *svm);
+static int nested_svm_intercept(struct vcpu_svm *svm);
+static int nested_svm_vmexit(struct vcpu_svm *svm);
+static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
+ bool has_error_code, u32 error_code);
+static u64 __scale_tsc(u64 ratio, u64 tsc);
+
+enum {
+ VMCB_INTERCEPTS, /* Intercept vectors, TSC offset,
+ pause filter count */
+ VMCB_PERM_MAP, /* IOPM Base and MSRPM Base */
+ VMCB_ASID, /* ASID */
+ VMCB_INTR, /* int_ctl, int_vector */
+ VMCB_NPT, /* npt_en, nCR3, gPAT */
+ VMCB_CR, /* CR0, CR3, CR4, EFER */
+ VMCB_DR, /* DR6, DR7 */
+ VMCB_DT, /* GDT, IDT */
+ VMCB_SEG, /* CS, DS, SS, ES, CPL */
+ VMCB_CR2, /* CR2 only */
+ VMCB_LBR, /* DBGCTL, BR_FROM, BR_TO, LAST_EX_FROM, LAST_EX_TO */
+ VMCB_DIRTY_MAX,
+};
+
+/* TPR and CR2 are always written before VMRUN */
+#define VMCB_ALWAYS_DIRTY_MASK ((1U << VMCB_INTR) | (1U << VMCB_CR2))
+
+static inline void mark_all_dirty(struct vmcb *vmcb)
+{
+ vmcb->control.clean = 0;
+}
+
+static inline void mark_all_clean(struct vmcb *vmcb)
+{
+ vmcb->control.clean = ((1 << VMCB_DIRTY_MAX) - 1)
+ & ~VMCB_ALWAYS_DIRTY_MASK;
+}
+
+static inline void mark_dirty(struct vmcb *vmcb, int bit)
+{
+ vmcb->control.clean &= ~(1 << bit);
+}
+
+static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu)
+{
+ return container_of(vcpu, struct vcpu_svm, vcpu);
+}
+
+static void recalc_intercepts(struct vcpu_svm *svm)
+{
+ struct vmcb_control_area *c, *h;
+ struct nested_state *g;
+
+ mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
+
+ if (!is_guest_mode(&svm->vcpu))
+ return;
+
+ c = &svm->vmcb->control;
+ h = &svm->nested.hsave->control;
+ g = &svm->nested;
+
+ c->intercept_cr = h->intercept_cr | g->intercept_cr;
+ c->intercept_dr = h->intercept_dr | g->intercept_dr;
+ c->intercept_exceptions = h->intercept_exceptions | g->intercept_exceptions;
+ c->intercept = h->intercept | g->intercept;
+}
+
+static inline struct vmcb *get_host_vmcb(struct vcpu_svm *svm)
+{
+ if (is_guest_mode(&svm->vcpu))
+ return svm->nested.hsave;
+ else
+ return svm->vmcb;
+}
+
+static inline void set_cr_intercept(struct vcpu_svm *svm, int bit)
+{
+ struct vmcb *vmcb = get_host_vmcb(svm);
+
+ vmcb->control.intercept_cr |= (1U << bit);
+
+ recalc_intercepts(svm);
+}
+
+static inline void clr_cr_intercept(struct vcpu_svm *svm, int bit)
+{
+ struct vmcb *vmcb = get_host_vmcb(svm);
+
+ vmcb->control.intercept_cr &= ~(1U << bit);
+
+ recalc_intercepts(svm);
+}
+
+static inline bool is_cr_intercept(struct vcpu_svm *svm, int bit)
+{
+ struct vmcb *vmcb = get_host_vmcb(svm);
+
+ return vmcb->control.intercept_cr & (1U << bit);
+}
+
+static inline void set_dr_intercepts(struct vcpu_svm *svm)
+{
+ struct vmcb *vmcb = get_host_vmcb(svm);
+
+ vmcb->control.intercept_dr = (1 << INTERCEPT_DR0_READ)
+ | (1 << INTERCEPT_DR1_READ)
+ | (1 << INTERCEPT_DR2_READ)
+ | (1 << INTERCEPT_DR3_READ)
+ | (1 << INTERCEPT_DR4_READ)
+ | (1 << INTERCEPT_DR5_READ)
+ | (1 << INTERCEPT_DR6_READ)
+ | (1 << INTERCEPT_DR7_READ)
+ | (1 << INTERCEPT_DR0_WRITE)
+ | (1 << INTERCEPT_DR1_WRITE)
+ | (1 << INTERCEPT_DR2_WRITE)
+ | (1 << INTERCEPT_DR3_WRITE)
+ | (1 << INTERCEPT_DR4_WRITE)
+ | (1 << INTERCEPT_DR5_WRITE)
+ | (1 << INTERCEPT_DR6_WRITE)
+ | (1 << INTERCEPT_DR7_WRITE);
+
+ recalc_intercepts(svm);
+}
+
+static inline void clr_dr_intercepts(struct vcpu_svm *svm)
+{
+ struct vmcb *vmcb = get_host_vmcb(svm);
+
+ vmcb->control.intercept_dr = 0;
+
+ recalc_intercepts(svm);
+}
+
+static inline void set_exception_intercept(struct vcpu_svm *svm, int bit)
+{
+ struct vmcb *vmcb = get_host_vmcb(svm);
+
+ vmcb->control.intercept_exceptions |= (1U << bit);
+
+ recalc_intercepts(svm);
+}
+
+static inline void clr_exception_intercept(struct vcpu_svm *svm, int bit)
+{
+ struct vmcb *vmcb = get_host_vmcb(svm);
+
+ vmcb->control.intercept_exceptions &= ~(1U << bit);
+
+ recalc_intercepts(svm);
+}
+
+static inline void set_intercept(struct vcpu_svm *svm, int bit)
+{
+ struct vmcb *vmcb = get_host_vmcb(svm);
+
+ vmcb->control.intercept |= (1ULL << bit);
+
+ recalc_intercepts(svm);
+}
+
+static inline void clr_intercept(struct vcpu_svm *svm, int bit)
+{
+ struct vmcb *vmcb = get_host_vmcb(svm);
+
+ vmcb->control.intercept &= ~(1ULL << bit);
+
+ recalc_intercepts(svm);
+}
+
+static inline void enable_gif(struct vcpu_svm *svm)
+{
+ svm->vcpu.arch.hflags |= HF_GIF_MASK;
+}
+
+static inline void disable_gif(struct vcpu_svm *svm)
+{
+ svm->vcpu.arch.hflags &= ~HF_GIF_MASK;
+}
+
+static inline bool gif_set(struct vcpu_svm *svm)
+{
+ return !!(svm->vcpu.arch.hflags & HF_GIF_MASK);
+}
+
+static unsigned long iopm_base;
+
+struct kvm_ldttss_desc {
+ u16 limit0;
+ u16 base0;
+ unsigned base1:8, type:5, dpl:2, p:1;
+ unsigned limit1:4, zero0:3, g:1, base2:8;
+ u32 base3;
+ u32 zero1;
+} __attribute__((packed));
+
+struct svm_cpu_data {
+ int cpu;
+
+ u64 asid_generation;
+ u32 max_asid;
+ u32 next_asid;
+ struct kvm_ldttss_desc *tss_desc;
+
+ struct page *save_area;
+};
+
+static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);
+
+struct svm_init_data {
+ int cpu;
+ int r;
+};
+
+static const u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000};
+
+#define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges)
+#define MSRS_RANGE_SIZE 2048
+#define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2)
+
+static u32 svm_msrpm_offset(u32 msr)
+{
+ u32 offset;
+ int i;
+
+ for (i = 0; i < NUM_MSR_MAPS; i++) {
+ if (msr < msrpm_ranges[i] ||
+ msr >= msrpm_ranges[i] + MSRS_IN_RANGE)
+ continue;
+
+ offset = (msr - msrpm_ranges[i]) / 4; /* 4 msrs per u8 */
+ offset += (i * MSRS_RANGE_SIZE); /* add range offset */
+
+ /* Now we have the u8 offset - but need the u32 offset */
+ return offset / 4;
+ }
+
+ /* MSR not in any range */
+ return MSR_INVALID;
+}
+
+#define MAX_INST_SIZE 15
+
+static inline void clgi(void)
+{
+ asm volatile (__ex(SVM_CLGI));
+}
+
+static inline void stgi(void)
+{
+ asm volatile (__ex(SVM_STGI));
+}
+
+static inline void invlpga(unsigned long addr, u32 asid)
+{
+ asm volatile (__ex(SVM_INVLPGA) : : "a"(addr), "c"(asid));
+}
+
+static int get_npt_level(void)
+{
+#ifdef CONFIG_X86_64
+ return PT64_ROOT_LEVEL;
+#else
+ return PT32E_ROOT_LEVEL;
+#endif
+}
+
+static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
+{
+ vcpu->arch.efer = efer;
+ if (!npt_enabled && !(efer & EFER_LMA))
+ efer &= ~EFER_LME;
+
+ to_svm(vcpu)->vmcb->save.efer = efer | EFER_SVME;
+ mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
+}
+
+static int is_external_interrupt(u32 info)
+{
+ info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
+ return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR);
+}
+
+static u32 svm_get_interrupt_shadow(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+ u32 ret = 0;
+
+ if (svm->vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK)
+ ret = KVM_X86_SHADOW_INT_STI | KVM_X86_SHADOW_INT_MOV_SS;
+ return ret;
+}
+
+static void svm_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ if (mask == 0)
+ svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK;
+ else
+ svm->vmcb->control.int_state |= SVM_INTERRUPT_SHADOW_MASK;
+
+}
+
+static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ if (svm->vmcb->control.next_rip != 0) {
+ WARN_ON(!static_cpu_has(X86_FEATURE_NRIPS));
+ svm->next_rip = svm->vmcb->control.next_rip;
+ }
+
+ if (!svm->next_rip) {
+ if (emulate_instruction(vcpu, EMULTYPE_SKIP) !=
+ EMULATE_DONE)
+ printk(KERN_DEBUG "%s: NOP\n", __func__);
+ return;
+ }
+ if (svm->next_rip - kvm_rip_read(vcpu) > MAX_INST_SIZE)
+ printk(KERN_ERR "%s: ip 0x%lx next 0x%llx\n",
+ __func__, kvm_rip_read(vcpu), svm->next_rip);
+
+ kvm_rip_write(vcpu, svm->next_rip);
+ svm_set_interrupt_shadow(vcpu, 0);
+}
+
+static void svm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
+ bool has_error_code, u32 error_code,
+ bool reinject)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ /*
+ * If we are within a nested VM we'd better #VMEXIT and let the guest
+ * handle the exception
+ */
+ if (!reinject &&
+ nested_svm_check_exception(svm, nr, has_error_code, error_code))
+ return;
+
+ if (nr == BP_VECTOR && !static_cpu_has(X86_FEATURE_NRIPS)) {
+ unsigned long rip, old_rip = kvm_rip_read(&svm->vcpu);
+
+ /*
+ * For guest debugging where we have to reinject #BP if some
+ * INT3 is guest-owned:
+ * Emulate nRIP by moving RIP forward. Will fail if injection
+ * raises a fault that is not intercepted. Still better than
+ * failing in all cases.
+ */
+ skip_emulated_instruction(&svm->vcpu);
+ rip = kvm_rip_read(&svm->vcpu);
+ svm->int3_rip = rip + svm->vmcb->save.cs.base;
+ svm->int3_injected = rip - old_rip;
+ }
+
+ svm->vmcb->control.event_inj = nr
+ | SVM_EVTINJ_VALID
+ | (has_error_code ? SVM_EVTINJ_VALID_ERR : 0)
+ | SVM_EVTINJ_TYPE_EXEPT;
+ svm->vmcb->control.event_inj_err = error_code;
+}
+
+static void svm_init_erratum_383(void)
+{
+ u32 low, high;
+ int err;
+ u64 val;
+
+ if (!static_cpu_has_bug(X86_BUG_AMD_TLB_MMATCH))
+ return;
+
+ /* Use _safe variants to not break nested virtualization */
+ val = native_read_msr_safe(MSR_AMD64_DC_CFG, &err);
+ if (err)
+ return;
+
+ val |= (1ULL << 47);
+
+ low = lower_32_bits(val);
+ high = upper_32_bits(val);
+
+ native_write_msr_safe(MSR_AMD64_DC_CFG, low, high);
+
+ erratum_383_found = true;
+}
+
+static void svm_init_osvw(struct kvm_vcpu *vcpu)
+{
+ /*
+ * Guests should see errata 400 and 415 as fixed (assuming that
+ * HLT and IO instructions are intercepted).
+ */
+ vcpu->arch.osvw.length = (osvw_len >= 3) ? (osvw_len) : 3;
+ vcpu->arch.osvw.status = osvw_status & ~(6ULL);
+
+ /*
+ * By increasing VCPU's osvw.length to 3 we are telling the guest that
+ * all osvw.status bits inside that length, including bit 0 (which is
+ * reserved for erratum 298), are valid. However, if host processor's
+ * osvw_len is 0 then osvw_status[0] carries no information. We need to
+ * be conservative here and therefore we tell the guest that erratum 298
+ * is present (because we really don't know).
+ */
+ if (osvw_len == 0 && boot_cpu_data.x86 == 0x10)
+ vcpu->arch.osvw.status |= 1;
+}
+
+static int has_svm(void)
+{
+ const char *msg;
+
+ if (!cpu_has_svm(&msg)) {
+ printk(KERN_INFO "has_svm: %s\n", msg);
+ return 0;
+ }
+
+ return 1;
+}
+
+static void svm_hardware_disable(void)
+{
+ /* Make sure we clean up behind us */
+ if (static_cpu_has(X86_FEATURE_TSCRATEMSR))
+ wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);
+
+ cpu_svm_disable();
+
+ amd_pmu_disable_virt();
+}
+
+static int svm_hardware_enable(void)
+{
+
+ struct svm_cpu_data *sd;
+ uint64_t efer;
+ struct desc_ptr gdt_descr;
+ struct desc_struct *gdt;
+ int me = raw_smp_processor_id();
+
+ rdmsrl(MSR_EFER, efer);
+ if (efer & EFER_SVME)
+ return -EBUSY;
+
+ if (!has_svm()) {
+ pr_err("%s: err EOPNOTSUPP on %d\n", __func__, me);
+ return -EINVAL;
+ }
+ sd = per_cpu(svm_data, me);
+ if (!sd) {
+ pr_err("%s: svm_data is NULL on %d\n", __func__, me);
+ return -EINVAL;
+ }
+
+ sd->asid_generation = 1;
+ sd->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
+ sd->next_asid = sd->max_asid + 1;
+
+ native_store_gdt(&gdt_descr);
+ gdt = (struct desc_struct *)gdt_descr.address;
+ sd->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
+
+ wrmsrl(MSR_EFER, efer | EFER_SVME);
+
+ wrmsrl(MSR_VM_HSAVE_PA, page_to_pfn(sd->save_area) << PAGE_SHIFT);
+
+ if (static_cpu_has(X86_FEATURE_TSCRATEMSR)) {
+ wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);
+ __this_cpu_write(current_tsc_ratio, TSC_RATIO_DEFAULT);
+ }
+
+
+ /*
+ * Get OSVW bits.
+ *
+ * Note that it is possible to have a system with mixed processor
+ * revisions and therefore different OSVW bits. If bits are not the same
+ * on different processors then choose the worst case (i.e. if erratum
+ * is present on one processor and not on another then assume that the
+ * erratum is present everywhere).
+ */
+ if (cpu_has(&boot_cpu_data, X86_FEATURE_OSVW)) {
+ uint64_t len, status = 0;
+ int err;
+
+ len = native_read_msr_safe(MSR_AMD64_OSVW_ID_LENGTH, &err);
+ if (!err)
+ status = native_read_msr_safe(MSR_AMD64_OSVW_STATUS,
+ &err);
+
+ if (err)
+ osvw_status = osvw_len = 0;
+ else {
+ if (len < osvw_len)
+ osvw_len = len;
+ osvw_status |= status;
+ osvw_status &= (1ULL << osvw_len) - 1;
+ }
+ } else
+ osvw_status = osvw_len = 0;
+
+ svm_init_erratum_383();
+
+ amd_pmu_enable_virt();
+
+ return 0;
+}
+
+static void svm_cpu_uninit(int cpu)
+{
+ struct svm_cpu_data *sd = per_cpu(svm_data, raw_smp_processor_id());
+
+ if (!sd)
+ return;
+
+ per_cpu(svm_data, raw_smp_processor_id()) = NULL;
+ __free_page(sd->save_area);
+ kfree(sd);
+}
+
+static int svm_cpu_init(int cpu)
+{
+ struct svm_cpu_data *sd;
+ int r;
+
+ sd = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
+ if (!sd)
+ return -ENOMEM;
+ sd->cpu = cpu;
+ sd->save_area = alloc_page(GFP_KERNEL);
+ r = -ENOMEM;
+ if (!sd->save_area)
+ goto err_1;
+
+ per_cpu(svm_data, cpu) = sd;
+
+ return 0;
+
+err_1:
+ kfree(sd);
+ return r;
+
+}
+
+static bool valid_msr_intercept(u32 index)
+{
+ int i;
+
+ for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++)
+ if (direct_access_msrs[i].index == index)
+ return true;
+
+ return false;
+}
+
+static void set_msr_interception(u32 *msrpm, unsigned msr,
+ int read, int write)
+{
+ u8 bit_read, bit_write;
+ unsigned long tmp;
+ u32 offset;
+
+ /*
+ * If this warning triggers extend the direct_access_msrs list at the
+ * beginning of the file
+ */
+ WARN_ON(!valid_msr_intercept(msr));
+
+ offset = svm_msrpm_offset(msr);
+ bit_read = 2 * (msr & 0x0f);
+ bit_write = 2 * (msr & 0x0f) + 1;
+ tmp = msrpm[offset];
+
+ BUG_ON(offset == MSR_INVALID);
+
+ read ? clear_bit(bit_read, &tmp) : set_bit(bit_read, &tmp);
+ write ? clear_bit(bit_write, &tmp) : set_bit(bit_write, &tmp);
+
+ msrpm[offset] = tmp;
+}
+
+static void svm_vcpu_init_msrpm(u32 *msrpm)
+{
+ int i;
+
+ memset(msrpm, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER));
+
+ for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) {
+ if (!direct_access_msrs[i].always)
+ continue;
+
+ set_msr_interception(msrpm, direct_access_msrs[i].index, 1, 1);
+ }
+}
+
+static void add_msr_offset(u32 offset)
+{
+ int i;
+
+ for (i = 0; i < MSRPM_OFFSETS; ++i) {
+
+ /* Offset already in list? */
+ if (msrpm_offsets[i] == offset)
+ return;
+
+ /* Slot used by another offset? */
+ if (msrpm_offsets[i] != MSR_INVALID)
+ continue;
+
+ /* Add offset to list */
+ msrpm_offsets[i] = offset;
+
+ return;
+ }
+
+ /*
+ * If this BUG triggers the msrpm_offsets table has an overflow. Just
+ * increase MSRPM_OFFSETS in this case.
+ */
+ BUG();
+}
+
+static void init_msrpm_offsets(void)
+{
+ int i;
+
+ memset(msrpm_offsets, 0xff, sizeof(msrpm_offsets));
+
+ for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) {
+ u32 offset;
+
+ offset = svm_msrpm_offset(direct_access_msrs[i].index);
+ BUG_ON(offset == MSR_INVALID);
+
+ add_msr_offset(offset);
+ }
+}
+
+static void svm_enable_lbrv(struct vcpu_svm *svm)
+{
+ u32 *msrpm = svm->msrpm;
+
+ svm->vmcb->control.lbr_ctl = 1;
+ set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 1, 1);
+ set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 1, 1);
+ set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 1, 1);
+ set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 1, 1);
+}
+
+static void svm_disable_lbrv(struct vcpu_svm *svm)
+{
+ u32 *msrpm = svm->msrpm;
+
+ svm->vmcb->control.lbr_ctl = 0;
+ set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 0, 0);
+ set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 0, 0);
+ set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 0, 0);
+ set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 0, 0);
+}
+
+static __init int svm_hardware_setup(void)
+{
+ int cpu;
+ struct page *iopm_pages;
+ void *iopm_va;
+ int r;
+
+ iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER);
+
+ if (!iopm_pages)
+ return -ENOMEM;
+
+ iopm_va = page_address(iopm_pages);
+ memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
+ iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;
+
+ init_msrpm_offsets();
+
+ if (boot_cpu_has(X86_FEATURE_NX))
+ kvm_enable_efer_bits(EFER_NX);
+
+ if (boot_cpu_has(X86_FEATURE_FXSR_OPT))
+ kvm_enable_efer_bits(EFER_FFXSR);
+
+ if (boot_cpu_has(X86_FEATURE_TSCRATEMSR)) {
+ u64 max;
+
+ kvm_has_tsc_control = true;
+
+ /*
+ * Make sure the user can only configure tsc_khz values that
+ * fit into a signed integer.
+ * A min value is not calculated needed because it will always
+ * be 1 on all machines and a value of 0 is used to disable
+ * tsc-scaling for the vcpu.
+ */
+ max = min(0x7fffffffULL, __scale_tsc(tsc_khz, TSC_RATIO_MAX));
+
+ kvm_max_guest_tsc_khz = max;
+ }
+
+ if (nested) {
+ printk(KERN_INFO "kvm: Nested Virtualization enabled\n");
+ kvm_enable_efer_bits(EFER_SVME | EFER_LMSLE);
+ }
+
+ for_each_possible_cpu(cpu) {
+ r = svm_cpu_init(cpu);
+ if (r)
+ goto err;
+ }
+
+ if (!boot_cpu_has(X86_FEATURE_NPT))
+ npt_enabled = false;
+
+ if (npt_enabled && !npt) {
+ printk(KERN_INFO "kvm: Nested Paging disabled\n");
+ npt_enabled = false;
+ }
+
+ if (npt_enabled) {
+ printk(KERN_INFO "kvm: Nested Paging enabled\n");
+ kvm_enable_tdp();
+ } else
+ kvm_disable_tdp();
+
+ return 0;
+
+err:
+ __free_pages(iopm_pages, IOPM_ALLOC_ORDER);
+ iopm_base = 0;
+ return r;
+}
+
+static __exit void svm_hardware_unsetup(void)
+{
+ int cpu;
+
+ for_each_possible_cpu(cpu)
+ svm_cpu_uninit(cpu);
+
+ __free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);
+ iopm_base = 0;
+}
+
+static void init_seg(struct vmcb_seg *seg)
+{
+ seg->selector = 0;
+ seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK |
+ SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */
+ seg->limit = 0xffff;
+ seg->base = 0;
+}
+
+static void init_sys_seg(struct vmcb_seg *seg, uint32_t type)
+{
+ seg->selector = 0;
+ seg->attrib = SVM_SELECTOR_P_MASK | type;
+ seg->limit = 0xffff;
+ seg->base = 0;
+}
+
+static u64 __scale_tsc(u64 ratio, u64 tsc)
+{
+ u64 mult, frac, _tsc;
+
+ mult = ratio >> 32;
+ frac = ratio & ((1ULL << 32) - 1);
+
+ _tsc = tsc;
+ _tsc *= mult;
+ _tsc += (tsc >> 32) * frac;
+ _tsc += ((tsc & ((1ULL << 32) - 1)) * frac) >> 32;
+
+ return _tsc;
+}
+
+static u64 svm_scale_tsc(struct kvm_vcpu *vcpu, u64 tsc)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+ u64 _tsc = tsc;
+
+ if (svm->tsc_ratio != TSC_RATIO_DEFAULT)
+ _tsc = __scale_tsc(svm->tsc_ratio, tsc);
+
+ return _tsc;
+}
+
+static void svm_set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+ u64 ratio;
+ u64 khz;
+
+ /* Guest TSC same frequency as host TSC? */
+ if (!scale) {
+ svm->tsc_ratio = TSC_RATIO_DEFAULT;
+ return;
+ }
+
+ /* TSC scaling supported? */
+ if (!boot_cpu_has(X86_FEATURE_TSCRATEMSR)) {
+ if (user_tsc_khz > tsc_khz) {
+ vcpu->arch.tsc_catchup = 1;
+ vcpu->arch.tsc_always_catchup = 1;
+ } else
+ WARN(1, "user requested TSC rate below hardware speed\n");
+ return;
+ }
+
+ khz = user_tsc_khz;
+
+ /* TSC scaling required - calculate ratio */
+ ratio = khz << 32;
+ do_div(ratio, tsc_khz);
+
+ if (ratio == 0 || ratio & TSC_RATIO_RSVD) {
+ WARN_ONCE(1, "Invalid TSC ratio - virtual-tsc-khz=%u\n",
+ user_tsc_khz);
+ return;
+ }
+ svm->tsc_ratio = ratio;
+}
+
+static u64 svm_read_tsc_offset(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ return svm->vmcb->control.tsc_offset;
+}
+
+static void svm_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+ u64 g_tsc_offset = 0;
+
+ if (is_guest_mode(vcpu)) {
+ g_tsc_offset = svm->vmcb->control.tsc_offset -
+ svm->nested.hsave->control.tsc_offset;
+ svm->nested.hsave->control.tsc_offset = offset;
+ } else
+ trace_kvm_write_tsc_offset(vcpu->vcpu_id,
+ svm->vmcb->control.tsc_offset,
+ offset);
+
+ svm->vmcb->control.tsc_offset = offset + g_tsc_offset;
+
+ mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
+}
+
+static void svm_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment, bool host)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ if (host) {
+ if (svm->tsc_ratio != TSC_RATIO_DEFAULT)
+ WARN_ON(adjustment < 0);
+ adjustment = svm_scale_tsc(vcpu, (u64)adjustment);
+ }
+
+ svm->vmcb->control.tsc_offset += adjustment;
+ if (is_guest_mode(vcpu))
+ svm->nested.hsave->control.tsc_offset += adjustment;
+ else
+ trace_kvm_write_tsc_offset(vcpu->vcpu_id,
+ svm->vmcb->control.tsc_offset - adjustment,
+ svm->vmcb->control.tsc_offset);
+
+ mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
+}
+
+static u64 svm_compute_tsc_offset(struct kvm_vcpu *vcpu, u64 target_tsc)
+{
+ u64 tsc;
+
+ tsc = svm_scale_tsc(vcpu, native_read_tsc());
+
+ return target_tsc - tsc;
+}
+
+static void init_vmcb(struct vcpu_svm *svm)
+{
+ struct vmcb_control_area *control = &svm->vmcb->control;
+ struct vmcb_save_area *save = &svm->vmcb->save;
+
+ svm->vcpu.fpu_active = 1;
+ svm->vcpu.arch.hflags = 0;
+
+ set_cr_intercept(svm, INTERCEPT_CR0_READ);
+ set_cr_intercept(svm, INTERCEPT_CR3_READ);
+ set_cr_intercept(svm, INTERCEPT_CR4_READ);
+ set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
+ set_cr_intercept(svm, INTERCEPT_CR3_WRITE);
+ set_cr_intercept(svm, INTERCEPT_CR4_WRITE);
+ set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
+
+ set_dr_intercepts(svm);
+
+ set_exception_intercept(svm, PF_VECTOR);
+ set_exception_intercept(svm, UD_VECTOR);
+ set_exception_intercept(svm, MC_VECTOR);
+
+ set_intercept(svm, INTERCEPT_INTR);
+ set_intercept(svm, INTERCEPT_NMI);
+ set_intercept(svm, INTERCEPT_SMI);
+ set_intercept(svm, INTERCEPT_SELECTIVE_CR0);
+ set_intercept(svm, INTERCEPT_RDPMC);
+ set_intercept(svm, INTERCEPT_CPUID);
+ set_intercept(svm, INTERCEPT_INVD);
+ set_intercept(svm, INTERCEPT_HLT);
+ set_intercept(svm, INTERCEPT_INVLPG);
+ set_intercept(svm, INTERCEPT_INVLPGA);
+ set_intercept(svm, INTERCEPT_IOIO_PROT);
+ set_intercept(svm, INTERCEPT_MSR_PROT);
+ set_intercept(svm, INTERCEPT_TASK_SWITCH);
+ set_intercept(svm, INTERCEPT_SHUTDOWN);
+ set_intercept(svm, INTERCEPT_VMRUN);
+ set_intercept(svm, INTERCEPT_VMMCALL);
+ set_intercept(svm, INTERCEPT_VMLOAD);
+ set_intercept(svm, INTERCEPT_VMSAVE);
+ set_intercept(svm, INTERCEPT_STGI);
+ set_intercept(svm, INTERCEPT_CLGI);
+ set_intercept(svm, INTERCEPT_SKINIT);
+ set_intercept(svm, INTERCEPT_WBINVD);
+ set_intercept(svm, INTERCEPT_MONITOR);
+ set_intercept(svm, INTERCEPT_MWAIT);
+ set_intercept(svm, INTERCEPT_XSETBV);
+
+ control->iopm_base_pa = iopm_base;
+ control->msrpm_base_pa = __pa(svm->msrpm);
+ control->int_ctl = V_INTR_MASKING_MASK;
+
+ init_seg(&save->es);
+ init_seg(&save->ss);
+ init_seg(&save->ds);
+ init_seg(&save->fs);
+ init_seg(&save->gs);
+
+ save->cs.selector = 0xf000;
+ save->cs.base = 0xffff0000;
+ /* Executable/Readable Code Segment */
+ save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK |
+ SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK;
+ save->cs.limit = 0xffff;
+
+ save->gdtr.limit = 0xffff;
+ save->idtr.limit = 0xffff;
+
+ init_sys_seg(&save->ldtr, SEG_TYPE_LDT);
+ init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16);
+
+ svm_set_efer(&svm->vcpu, 0);
+ save->dr6 = 0xffff0ff0;
+ kvm_set_rflags(&svm->vcpu, 2);
+ save->rip = 0x0000fff0;
+ svm->vcpu.arch.regs[VCPU_REGS_RIP] = save->rip;
+
+ /*
+ * This is the guest-visible cr0 value.
+ * svm_set_cr0() sets PG and WP and clears NW and CD on save->cr0.
+ */
+ svm->vcpu.arch.cr0 = 0;
+ (void)kvm_set_cr0(&svm->vcpu, X86_CR0_NW | X86_CR0_CD | X86_CR0_ET);
+
+ save->cr4 = X86_CR4_PAE;
+ /* rdx = ?? */
+
+ if (npt_enabled) {
+ /* Setup VMCB for Nested Paging */
+ control->nested_ctl = 1;
+ clr_intercept(svm, INTERCEPT_INVLPG);
+ clr_exception_intercept(svm, PF_VECTOR);
+ clr_cr_intercept(svm, INTERCEPT_CR3_READ);
+ clr_cr_intercept(svm, INTERCEPT_CR3_WRITE);
+ save->g_pat = 0x0007040600070406ULL;
+ save->cr3 = 0;
+ save->cr4 = 0;
+ }
+ svm->asid_generation = 0;
+
+ svm->nested.vmcb = 0;
+ svm->vcpu.arch.hflags = 0;
+
+ if (boot_cpu_has(X86_FEATURE_PAUSEFILTER)) {
+ control->pause_filter_count = 3000;
+ set_intercept(svm, INTERCEPT_PAUSE);
+ }
+
+ mark_all_dirty(svm->vmcb);
+
+ enable_gif(svm);
+}
+
+static void svm_vcpu_reset(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+ u32 dummy;
+ u32 eax = 1;
+
+ init_vmcb(svm);
+
+ kvm_cpuid(vcpu, &eax, &dummy, &dummy, &dummy);
+ kvm_register_write(vcpu, VCPU_REGS_RDX, eax);
+}
+
+static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id)
+{
+ struct vcpu_svm *svm;
+ struct page *page;
+ struct page *msrpm_pages;
+ struct page *hsave_page;
+ struct page *nested_msrpm_pages;
+ int err;
+
+ svm = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
+ if (!svm) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ svm->tsc_ratio = TSC_RATIO_DEFAULT;
+
+ err = kvm_vcpu_init(&svm->vcpu, kvm, id);
+ if (err)
+ goto free_svm;
+
+ err = -ENOMEM;
+ page = alloc_page(GFP_KERNEL);
+ if (!page)
+ goto uninit;
+
+ msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
+ if (!msrpm_pages)
+ goto free_page1;
+
+ nested_msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
+ if (!nested_msrpm_pages)
+ goto free_page2;
+
+ hsave_page = alloc_page(GFP_KERNEL);
+ if (!hsave_page)
+ goto free_page3;
+
+ svm->nested.hsave = page_address(hsave_page);
+
+ svm->msrpm = page_address(msrpm_pages);
+ svm_vcpu_init_msrpm(svm->msrpm);
+
+ svm->nested.msrpm = page_address(nested_msrpm_pages);
+ svm_vcpu_init_msrpm(svm->nested.msrpm);
+
+ svm->vmcb = page_address(page);
+ clear_page(svm->vmcb);
+ svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT;
+ svm->asid_generation = 0;
+ init_vmcb(svm);
+
+ svm->vcpu.arch.apic_base = APIC_DEFAULT_PHYS_BASE |
+ MSR_IA32_APICBASE_ENABLE;
+ if (kvm_vcpu_is_reset_bsp(&svm->vcpu))
+ svm->vcpu.arch.apic_base |= MSR_IA32_APICBASE_BSP;
+
+ svm_init_osvw(&svm->vcpu);
+
+ return &svm->vcpu;
+
+free_page3:
+ __free_pages(nested_msrpm_pages, MSRPM_ALLOC_ORDER);
+free_page2:
+ __free_pages(msrpm_pages, MSRPM_ALLOC_ORDER);
+free_page1:
+ __free_page(page);
+uninit:
+ kvm_vcpu_uninit(&svm->vcpu);
+free_svm:
+ kmem_cache_free(kvm_vcpu_cache, svm);
+out:
+ return ERR_PTR(err);
+}
+
+static void svm_free_vcpu(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ __free_page(pfn_to_page(svm->vmcb_pa >> PAGE_SHIFT));
+ __free_pages(virt_to_page(svm->msrpm), MSRPM_ALLOC_ORDER);
+ __free_page(virt_to_page(svm->nested.hsave));
+ __free_pages(virt_to_page(svm->nested.msrpm), MSRPM_ALLOC_ORDER);
+ kvm_vcpu_uninit(vcpu);
+ kmem_cache_free(kvm_vcpu_cache, svm);
+}
+
+static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+ int i;
+
+ if (unlikely(cpu != vcpu->cpu)) {
+ svm->asid_generation = 0;
+ mark_all_dirty(svm->vmcb);
+ }
+
+#ifdef CONFIG_X86_64
+ rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host.gs_base);
+#endif
+ savesegment(fs, svm->host.fs);
+ savesegment(gs, svm->host.gs);
+ svm->host.ldt = kvm_read_ldt();
+
+ for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
+ rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
+
+ if (static_cpu_has(X86_FEATURE_TSCRATEMSR) &&
+ svm->tsc_ratio != __this_cpu_read(current_tsc_ratio)) {
+ __this_cpu_write(current_tsc_ratio, svm->tsc_ratio);
+ wrmsrl(MSR_AMD64_TSC_RATIO, svm->tsc_ratio);
+ }
+}
+
+static void svm_vcpu_put(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+ int i;
+
+ ++vcpu->stat.host_state_reload;
+ kvm_load_ldt(svm->host.ldt);
+#ifdef CONFIG_X86_64
+ loadsegment(fs, svm->host.fs);
+ wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gs);
+ load_gs_index(svm->host.gs);
+#else
+#ifdef CONFIG_X86_32_LAZY_GS
+ loadsegment(gs, svm->host.gs);
+#endif
+#endif
+ for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
+ wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
+}
+
+static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
+{
+ return to_svm(vcpu)->vmcb->save.rflags;
+}
+
+static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
+{
+ /*
+ * Any change of EFLAGS.VM is accompained by a reload of SS
+ * (caused by either a task switch or an inter-privilege IRET),
+ * so we do not need to update the CPL here.
+ */
+ to_svm(vcpu)->vmcb->save.rflags = rflags;
+}
+
+static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
+{
+ switch (reg) {
+ case VCPU_EXREG_PDPTR:
+ BUG_ON(!npt_enabled);
+ load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu));
+ break;
+ default:
+ BUG();
+ }
+}
+
+static void svm_set_vintr(struct vcpu_svm *svm)
+{
+ set_intercept(svm, INTERCEPT_VINTR);
+}
+
+static void svm_clear_vintr(struct vcpu_svm *svm)
+{
+ clr_intercept(svm, INTERCEPT_VINTR);
+}
+
+static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
+{
+ struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
+
+ switch (seg) {
+ case VCPU_SREG_CS: return &save->cs;
+ case VCPU_SREG_DS: return &save->ds;
+ case VCPU_SREG_ES: return &save->es;
+ case VCPU_SREG_FS: return &save->fs;
+ case VCPU_SREG_GS: return &save->gs;
+ case VCPU_SREG_SS: return &save->ss;
+ case VCPU_SREG_TR: return &save->tr;
+ case VCPU_SREG_LDTR: return &save->ldtr;
+ }
+ BUG();
+ return NULL;
+}
+
+static u64 svm_get_segment_base(struct kvm_vcpu *vcpu, int seg)
+{
+ struct vmcb_seg *s = svm_seg(vcpu, seg);
+
+ return s->base;
+}
+
+static void svm_get_segment(struct kvm_vcpu *vcpu,
+ struct kvm_segment *var, int seg)
+{
+ struct vmcb_seg *s = svm_seg(vcpu, seg);
+
+ var->base = s->base;
+ var->limit = s->limit;
+ var->selector = s->selector;
+ var->type = s->attrib & SVM_SELECTOR_TYPE_MASK;
+ var->s = (s->attrib >> SVM_SELECTOR_S_SHIFT) & 1;
+ var->dpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3;
+ var->present = (s->attrib >> SVM_SELECTOR_P_SHIFT) & 1;
+ var->avl = (s->attrib >> SVM_SELECTOR_AVL_SHIFT) & 1;
+ var->l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1;
+ var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
+
+ /*
+ * AMD CPUs circa 2014 track the G bit for all segments except CS.
+ * However, the SVM spec states that the G bit is not observed by the
+ * CPU, and some VMware virtual CPUs drop the G bit for all segments.
+ * So let's synthesize a legal G bit for all segments, this helps
+ * running KVM nested. It also helps cross-vendor migration, because
+ * Intel's vmentry has a check on the 'G' bit.
+ */
+ var->g = s->limit > 0xfffff;
+
+ /*
+ * AMD's VMCB does not have an explicit unusable field, so emulate it
+ * for cross vendor migration purposes by "not present"
+ */
+ var->unusable = !var->present || (var->type == 0);
+
+ switch (seg) {
+ case VCPU_SREG_TR:
+ /*
+ * Work around a bug where the busy flag in the tr selector
+ * isn't exposed
+ */
+ var->type |= 0x2;
+ break;
+ case VCPU_SREG_DS:
+ case VCPU_SREG_ES:
+ case VCPU_SREG_FS:
+ case VCPU_SREG_GS:
+ /*
+ * The accessed bit must always be set in the segment
+ * descriptor cache, although it can be cleared in the
+ * descriptor, the cached bit always remains at 1. Since
+ * Intel has a check on this, set it here to support
+ * cross-vendor migration.
+ */
+ if (!var->unusable)
+ var->type |= 0x1;
+ break;
+ case VCPU_SREG_SS:
+ /*
+ * On AMD CPUs sometimes the DB bit in the segment
+ * descriptor is left as 1, although the whole segment has
+ * been made unusable. Clear it here to pass an Intel VMX
+ * entry check when cross vendor migrating.
+ */
+ if (var->unusable)
+ var->db = 0;
+ var->dpl = to_svm(vcpu)->vmcb->save.cpl;
+ break;
+ }
+}
+
+static int svm_get_cpl(struct kvm_vcpu *vcpu)
+{
+ struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
+
+ return save->cpl;
+}
+
+static void svm_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ dt->size = svm->vmcb->save.idtr.limit;
+ dt->address = svm->vmcb->save.idtr.base;
+}
+
+static void svm_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ svm->vmcb->save.idtr.limit = dt->size;
+ svm->vmcb->save.idtr.base = dt->address ;
+ mark_dirty(svm->vmcb, VMCB_DT);
+}
+
+static void svm_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ dt->size = svm->vmcb->save.gdtr.limit;
+ dt->address = svm->vmcb->save.gdtr.base;
+}
+
+static void svm_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ svm->vmcb->save.gdtr.limit = dt->size;
+ svm->vmcb->save.gdtr.base = dt->address ;
+ mark_dirty(svm->vmcb, VMCB_DT);
+}
+
+static void svm_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
+{
+}
+
+static void svm_decache_cr3(struct kvm_vcpu *vcpu)
+{
+}
+
+static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
+{
+}
+
+static void update_cr0_intercept(struct vcpu_svm *svm)
+{
+ ulong gcr0 = svm->vcpu.arch.cr0;
+ u64 *hcr0 = &svm->vmcb->save.cr0;
+
+ if (!svm->vcpu.fpu_active)
+ *hcr0 |= SVM_CR0_SELECTIVE_MASK;
+ else
+ *hcr0 = (*hcr0 & ~SVM_CR0_SELECTIVE_MASK)
+ | (gcr0 & SVM_CR0_SELECTIVE_MASK);
+
+ mark_dirty(svm->vmcb, VMCB_CR);
+
+ if (gcr0 == *hcr0 && svm->vcpu.fpu_active) {
+ clr_cr_intercept(svm, INTERCEPT_CR0_READ);
+ clr_cr_intercept(svm, INTERCEPT_CR0_WRITE);
+ } else {
+ set_cr_intercept(svm, INTERCEPT_CR0_READ);
+ set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
+ }
+}
+
+static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+#ifdef CONFIG_X86_64
+ if (vcpu->arch.efer & EFER_LME) {
+ if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
+ vcpu->arch.efer |= EFER_LMA;
+ svm->vmcb->save.efer |= EFER_LMA | EFER_LME;
+ }
+
+ if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) {
+ vcpu->arch.efer &= ~EFER_LMA;
+ svm->vmcb->save.efer &= ~(EFER_LMA | EFER_LME);
+ }
+ }
+#endif
+ vcpu->arch.cr0 = cr0;
+
+ if (!npt_enabled)
+ cr0 |= X86_CR0_PG | X86_CR0_WP;
+
+ if (!vcpu->fpu_active)
+ cr0 |= X86_CR0_TS;
+ /*
+ * re-enable caching here because the QEMU bios
+ * does not do it - this results in some delay at
+ * reboot
+ */
+ cr0 &= ~(X86_CR0_CD | X86_CR0_NW);
+ svm->vmcb->save.cr0 = cr0;
+ mark_dirty(svm->vmcb, VMCB_CR);
+ update_cr0_intercept(svm);
+}
+
+static int svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
+{
+ unsigned long host_cr4_mce = cr4_read_shadow() & X86_CR4_MCE;
+ unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4;
+
+ if (cr4 & X86_CR4_VMXE)
+ return 1;
+
+ if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE))
+ svm_flush_tlb(vcpu);
+
+ vcpu->arch.cr4 = cr4;
+ if (!npt_enabled)
+ cr4 |= X86_CR4_PAE;
+ cr4 |= host_cr4_mce;
+ to_svm(vcpu)->vmcb->save.cr4 = cr4;
+ mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
+ return 0;
+}
+
+static void svm_set_segment(struct kvm_vcpu *vcpu,
+ struct kvm_segment *var, int seg)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+ struct vmcb_seg *s = svm_seg(vcpu, seg);
+
+ s->base = var->base;
+ s->limit = var->limit;
+ s->selector = var->selector;
+ if (var->unusable)
+ s->attrib = 0;
+ else {
+ s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK);
+ s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT;
+ s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT;
+ s->attrib |= (var->present & 1) << SVM_SELECTOR_P_SHIFT;
+ s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT;
+ s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT;
+ s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT;
+ s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT;
+ }
+
+ /*
+ * This is always accurate, except if SYSRET returned to a segment
+ * with SS.DPL != 3. Intel does not have this quirk, and always
+ * forces SS.DPL to 3 on sysret, so we ignore that case; fixing it
+ * would entail passing the CPL to userspace and back.
+ */
+ if (seg == VCPU_SREG_SS)
+ svm->vmcb->save.cpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3;
+
+ mark_dirty(svm->vmcb, VMCB_SEG);
+}
+
+static void update_db_bp_intercept(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ clr_exception_intercept(svm, DB_VECTOR);
+ clr_exception_intercept(svm, BP_VECTOR);
+
+ if (svm->nmi_singlestep)
+ set_exception_intercept(svm, DB_VECTOR);
+
+ if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) {
+ if (vcpu->guest_debug &
+ (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))
+ set_exception_intercept(svm, DB_VECTOR);
+ if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
+ set_exception_intercept(svm, BP_VECTOR);
+ } else
+ vcpu->guest_debug = 0;
+}
+
+static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd)
+{
+ if (sd->next_asid > sd->max_asid) {
+ ++sd->asid_generation;
+ sd->next_asid = 1;
+ svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
+ }
+
+ svm->asid_generation = sd->asid_generation;
+ svm->vmcb->control.asid = sd->next_asid++;
+
+ mark_dirty(svm->vmcb, VMCB_ASID);
+}
+
+static u64 svm_get_dr6(struct kvm_vcpu *vcpu)
+{
+ return to_svm(vcpu)->vmcb->save.dr6;
+}
+
+static void svm_set_dr6(struct kvm_vcpu *vcpu, unsigned long value)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ svm->vmcb->save.dr6 = value;
+ mark_dirty(svm->vmcb, VMCB_DR);
+}
+
+static void svm_sync_dirty_debug_regs(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ get_debugreg(vcpu->arch.db[0], 0);
+ get_debugreg(vcpu->arch.db[1], 1);
+ get_debugreg(vcpu->arch.db[2], 2);
+ get_debugreg(vcpu->arch.db[3], 3);
+ vcpu->arch.dr6 = svm_get_dr6(vcpu);
+ vcpu->arch.dr7 = svm->vmcb->save.dr7;
+
+ vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_WONT_EXIT;
+ set_dr_intercepts(svm);
+}
+
+static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ svm->vmcb->save.dr7 = value;
+ mark_dirty(svm->vmcb, VMCB_DR);
+}
+
+static int pf_interception(struct vcpu_svm *svm)
+{
+ u64 fault_address = svm->vmcb->control.exit_info_2;
+ u32 error_code;
+ int r = 1;
+
+ switch (svm->apf_reason) {
+ default:
+ error_code = svm->vmcb->control.exit_info_1;
+
+ trace_kvm_page_fault(fault_address, error_code);
+ if (!npt_enabled && kvm_event_needs_reinjection(&svm->vcpu))
+ kvm_mmu_unprotect_page_virt(&svm->vcpu, fault_address);
+ r = kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code,
+ svm->vmcb->control.insn_bytes,
+ svm->vmcb->control.insn_len);
+ break;
+ case KVM_PV_REASON_PAGE_NOT_PRESENT:
+ svm->apf_reason = 0;
+ local_irq_disable();
+ kvm_async_pf_task_wait(fault_address);
+ local_irq_enable();
+ break;
+ case KVM_PV_REASON_PAGE_READY:
+ svm->apf_reason = 0;
+ local_irq_disable();
+ kvm_async_pf_task_wake(fault_address);
+ local_irq_enable();
+ break;
+ }
+ return r;
+}
+
+static int db_interception(struct vcpu_svm *svm)
+{
+ struct kvm_run *kvm_run = svm->vcpu.run;
+
+ if (!(svm->vcpu.guest_debug &
+ (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) &&
+ !svm->nmi_singlestep) {
+ kvm_queue_exception(&svm->vcpu, DB_VECTOR);
+ return 1;
+ }
+
+ if (svm->nmi_singlestep) {
+ svm->nmi_singlestep = false;
+ if (!(svm->vcpu.guest_debug & KVM_GUESTDBG_SINGLESTEP))
+ svm->vmcb->save.rflags &=
+ ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
+ update_db_bp_intercept(&svm->vcpu);
+ }
+
+ if (svm->vcpu.guest_debug &
+ (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) {
+ kvm_run->exit_reason = KVM_EXIT_DEBUG;
+ kvm_run->debug.arch.pc =
+ svm->vmcb->save.cs.base + svm->vmcb->save.rip;
+ kvm_run->debug.arch.exception = DB_VECTOR;
+ return 0;
+ }
+
+ return 1;
+}
+
+static int bp_interception(struct vcpu_svm *svm)
+{
+ struct kvm_run *kvm_run = svm->vcpu.run;
+
+ kvm_run->exit_reason = KVM_EXIT_DEBUG;
+ kvm_run->debug.arch.pc = svm->vmcb->save.cs.base + svm->vmcb->save.rip;
+ kvm_run->debug.arch.exception = BP_VECTOR;
+ return 0;
+}
+
+static int ud_interception(struct vcpu_svm *svm)
+{
+ int er;
+
+ er = emulate_instruction(&svm->vcpu, EMULTYPE_TRAP_UD);
+ if (er != EMULATE_DONE)
+ kvm_queue_exception(&svm->vcpu, UD_VECTOR);
+ return 1;
+}
+
+static void svm_fpu_activate(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ clr_exception_intercept(svm, NM_VECTOR);
+
+ svm->vcpu.fpu_active = 1;
+ update_cr0_intercept(svm);
+}
+
+static int nm_interception(struct vcpu_svm *svm)
+{
+ svm_fpu_activate(&svm->vcpu);
+ return 1;
+}
+
+static bool is_erratum_383(void)
+{
+ int err, i;
+ u64 value;
+
+ if (!erratum_383_found)
+ return false;
+
+ value = native_read_msr_safe(MSR_IA32_MC0_STATUS, &err);
+ if (err)
+ return false;
+
+ /* Bit 62 may or may not be set for this mce */
+ value &= ~(1ULL << 62);
+
+ if (value != 0xb600000000010015ULL)
+ return false;
+
+ /* Clear MCi_STATUS registers */
+ for (i = 0; i < 6; ++i)
+ native_write_msr_safe(MSR_IA32_MCx_STATUS(i), 0, 0);
+
+ value = native_read_msr_safe(MSR_IA32_MCG_STATUS, &err);
+ if (!err) {
+ u32 low, high;
+
+ value &= ~(1ULL << 2);
+ low = lower_32_bits(value);
+ high = upper_32_bits(value);
+
+ native_write_msr_safe(MSR_IA32_MCG_STATUS, low, high);
+ }
+
+ /* Flush tlb to evict multi-match entries */
+ __flush_tlb_all();
+
+ return true;
+}
+
+static void svm_handle_mce(struct vcpu_svm *svm)
+{
+ if (is_erratum_383()) {
+ /*
+ * Erratum 383 triggered. Guest state is corrupt so kill the
+ * guest.
+ */
+ pr_err("KVM: Guest triggered AMD Erratum 383\n");
+
+ kvm_make_request(KVM_REQ_TRIPLE_FAULT, &svm->vcpu);
+
+ return;
+ }
+
+ /*
+ * On an #MC intercept the MCE handler is not called automatically in
+ * the host. So do it by hand here.
+ */
+ asm volatile (
+ "int $0x12\n");
+ /* not sure if we ever come back to this point */
+
+ return;
+}
+
+static int mc_interception(struct vcpu_svm *svm)
+{
+ return 1;
+}
+
+static int shutdown_interception(struct vcpu_svm *svm)
+{
+ struct kvm_run *kvm_run = svm->vcpu.run;
+
+ /*
+ * VMCB is undefined after a SHUTDOWN intercept
+ * so reinitialize it.
+ */
+ clear_page(svm->vmcb);
+ init_vmcb(svm);
+
+ kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
+ return 0;
+}
+
+static int io_interception(struct vcpu_svm *svm)
+{
+ struct kvm_vcpu *vcpu = &svm->vcpu;
+ u32 io_info = svm->vmcb->control.exit_info_1; /* address size bug? */
+ int size, in, string;
+ unsigned port;
+
+ ++svm->vcpu.stat.io_exits;
+ string = (io_info & SVM_IOIO_STR_MASK) != 0;
+ in = (io_info & SVM_IOIO_TYPE_MASK) != 0;
+ if (string || in)
+ return emulate_instruction(vcpu, 0) == EMULATE_DONE;
+
+ port = io_info >> 16;
+ size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT;
+ svm->next_rip = svm->vmcb->control.exit_info_2;
+ skip_emulated_instruction(&svm->vcpu);
+
+ return kvm_fast_pio_out(vcpu, size, port);
+}
+
+static int nmi_interception(struct vcpu_svm *svm)
+{
+ return 1;
+}
+
+static int intr_interception(struct vcpu_svm *svm)
+{
+ ++svm->vcpu.stat.irq_exits;
+ return 1;
+}
+
+static int nop_on_interception(struct vcpu_svm *svm)
+{
+ return 1;
+}
+
+static int halt_interception(struct vcpu_svm *svm)
+{
+ svm->next_rip = kvm_rip_read(&svm->vcpu) + 1;
+ return kvm_emulate_halt(&svm->vcpu);
+}
+
+static int vmmcall_interception(struct vcpu_svm *svm)
+{
+ svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
+ kvm_emulate_hypercall(&svm->vcpu);
+ return 1;
+}
+
+static unsigned long nested_svm_get_tdp_cr3(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ return svm->nested.nested_cr3;
+}
+
+static u64 nested_svm_get_tdp_pdptr(struct kvm_vcpu *vcpu, int index)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+ u64 cr3 = svm->nested.nested_cr3;
+ u64 pdpte;
+ int ret;
+
+ ret = kvm_read_guest_page(vcpu->kvm, gpa_to_gfn(cr3), &pdpte,
+ offset_in_page(cr3) + index * 8, 8);
+ if (ret)
+ return 0;
+ return pdpte;
+}
+
+static void nested_svm_set_tdp_cr3(struct kvm_vcpu *vcpu,
+ unsigned long root)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ svm->vmcb->control.nested_cr3 = root;
+ mark_dirty(svm->vmcb, VMCB_NPT);
+ svm_flush_tlb(vcpu);
+}
+
+static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu,
+ struct x86_exception *fault)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ if (svm->vmcb->control.exit_code != SVM_EXIT_NPF) {
+ /*
+ * TODO: track the cause of the nested page fault, and
+ * correctly fill in the high bits of exit_info_1.
+ */
+ svm->vmcb->control.exit_code = SVM_EXIT_NPF;
+ svm->vmcb->control.exit_code_hi = 0;
+ svm->vmcb->control.exit_info_1 = (1ULL << 32);
+ svm->vmcb->control.exit_info_2 = fault->address;
+ }
+
+ svm->vmcb->control.exit_info_1 &= ~0xffffffffULL;
+ svm->vmcb->control.exit_info_1 |= fault->error_code;
+
+ /*
+ * The present bit is always zero for page structure faults on real
+ * hardware.
+ */
+ if (svm->vmcb->control.exit_info_1 & (2ULL << 32))
+ svm->vmcb->control.exit_info_1 &= ~1;
+
+ nested_svm_vmexit(svm);
+}
+
+static void nested_svm_init_mmu_context(struct kvm_vcpu *vcpu)
+{
+ WARN_ON(mmu_is_nested(vcpu));
+ kvm_init_shadow_mmu(vcpu);
+ vcpu->arch.mmu.set_cr3 = nested_svm_set_tdp_cr3;
+ vcpu->arch.mmu.get_cr3 = nested_svm_get_tdp_cr3;
+ vcpu->arch.mmu.get_pdptr = nested_svm_get_tdp_pdptr;
+ vcpu->arch.mmu.inject_page_fault = nested_svm_inject_npf_exit;
+ vcpu->arch.mmu.shadow_root_level = get_npt_level();
+ vcpu->arch.walk_mmu = &vcpu->arch.nested_mmu;
+}
+
+static void nested_svm_uninit_mmu_context(struct kvm_vcpu *vcpu)
+{
+ vcpu->arch.walk_mmu = &vcpu->arch.mmu;
+}
+
+static int nested_svm_check_permissions(struct vcpu_svm *svm)
+{
+ if (!(svm->vcpu.arch.efer & EFER_SVME)
+ || !is_paging(&svm->vcpu)) {
+ kvm_queue_exception(&svm->vcpu, UD_VECTOR);
+ return 1;
+ }
+
+ if (svm->vmcb->save.cpl) {
+ kvm_inject_gp(&svm->vcpu, 0);
+ return 1;
+ }
+
+ return 0;
+}
+
+static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
+ bool has_error_code, u32 error_code)
+{
+ int vmexit;
+
+ if (!is_guest_mode(&svm->vcpu))
+ return 0;
+
+ svm->vmcb->control.exit_code = SVM_EXIT_EXCP_BASE + nr;
+ svm->vmcb->control.exit_code_hi = 0;
+ svm->vmcb->control.exit_info_1 = error_code;
+ svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2;
+
+ vmexit = nested_svm_intercept(svm);
+ if (vmexit == NESTED_EXIT_DONE)
+ svm->nested.exit_required = true;
+
+ return vmexit;
+}
+
+/* This function returns true if it is save to enable the irq window */
+static inline bool nested_svm_intr(struct vcpu_svm *svm)
+{
+ if (!is_guest_mode(&svm->vcpu))
+ return true;
+
+ if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
+ return true;
+
+ if (!(svm->vcpu.arch.hflags & HF_HIF_MASK))
+ return false;
+
+ /*
+ * if vmexit was already requested (by intercepted exception
+ * for instance) do not overwrite it with "external interrupt"
+ * vmexit.
+ */
+ if (svm->nested.exit_required)
+ return false;
+
+ svm->vmcb->control.exit_code = SVM_EXIT_INTR;
+ svm->vmcb->control.exit_info_1 = 0;
+ svm->vmcb->control.exit_info_2 = 0;
+
+ if (svm->nested.intercept & 1ULL) {
+ /*
+ * The #vmexit can't be emulated here directly because this
+ * code path runs with irqs and preemption disabled. A
+ * #vmexit emulation might sleep. Only signal request for
+ * the #vmexit here.
+ */
+ svm->nested.exit_required = true;
+ trace_kvm_nested_intr_vmexit(svm->vmcb->save.rip);
+ return false;
+ }
+
+ return true;
+}
+
+/* This function returns true if it is save to enable the nmi window */
+static inline bool nested_svm_nmi(struct vcpu_svm *svm)
+{
+ if (!is_guest_mode(&svm->vcpu))
+ return true;
+
+ if (!(svm->nested.intercept & (1ULL << INTERCEPT_NMI)))
+ return true;
+
+ svm->vmcb->control.exit_code = SVM_EXIT_NMI;
+ svm->nested.exit_required = true;
+
+ return false;
+}
+
+static void *nested_svm_map(struct vcpu_svm *svm, u64 gpa, struct page **_page)
+{
+ struct page *page;
+
+ might_sleep();
+
+ page = gfn_to_page(svm->vcpu.kvm, gpa >> PAGE_SHIFT);
+ if (is_error_page(page))
+ goto error;
+
+ *_page = page;
+
+ return kmap(page);
+
+error:
+ kvm_inject_gp(&svm->vcpu, 0);
+
+ return NULL;
+}
+
+static void nested_svm_unmap(struct page *page)
+{
+ kunmap(page);
+ kvm_release_page_dirty(page);
+}
+
+static int nested_svm_intercept_ioio(struct vcpu_svm *svm)
+{
+ unsigned port, size, iopm_len;
+ u16 val, mask;
+ u8 start_bit;
+ u64 gpa;
+
+ if (!(svm->nested.intercept & (1ULL << INTERCEPT_IOIO_PROT)))
+ return NESTED_EXIT_HOST;
+
+ port = svm->vmcb->control.exit_info_1 >> 16;
+ size = (svm->vmcb->control.exit_info_1 & SVM_IOIO_SIZE_MASK) >>
+ SVM_IOIO_SIZE_SHIFT;
+ gpa = svm->nested.vmcb_iopm + (port / 8);
+ start_bit = port % 8;
+ iopm_len = (start_bit + size > 8) ? 2 : 1;
+ mask = (0xf >> (4 - size)) << start_bit;
+ val = 0;
+
+ if (kvm_read_guest(svm->vcpu.kvm, gpa, &val, iopm_len))
+ return NESTED_EXIT_DONE;
+
+ return (val & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
+}
+
+static int nested_svm_exit_handled_msr(struct vcpu_svm *svm)
+{
+ u32 offset, msr, value;
+ int write, mask;
+
+ if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
+ return NESTED_EXIT_HOST;
+
+ msr = svm->vcpu.arch.regs[VCPU_REGS_RCX];
+ offset = svm_msrpm_offset(msr);
+ write = svm->vmcb->control.exit_info_1 & 1;
+ mask = 1 << ((2 * (msr & 0xf)) + write);
+
+ if (offset == MSR_INVALID)
+ return NESTED_EXIT_DONE;
+
+ /* Offset is in 32 bit units but need in 8 bit units */
+ offset *= 4;
+
+ if (kvm_read_guest(svm->vcpu.kvm, svm->nested.vmcb_msrpm + offset, &value, 4))
+ return NESTED_EXIT_DONE;
+
+ return (value & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
+}
+
+static int nested_svm_exit_special(struct vcpu_svm *svm)
+{
+ u32 exit_code = svm->vmcb->control.exit_code;
+
+ switch (exit_code) {
+ case SVM_EXIT_INTR:
+ case SVM_EXIT_NMI:
+ case SVM_EXIT_EXCP_BASE + MC_VECTOR:
+ return NESTED_EXIT_HOST;
+ case SVM_EXIT_NPF:
+ /* For now we are always handling NPFs when using them */
+ if (npt_enabled)
+ return NESTED_EXIT_HOST;
+ break;
+ case SVM_EXIT_EXCP_BASE + PF_VECTOR:
+ /* When we're shadowing, trap PFs, but not async PF */
+ if (!npt_enabled && svm->apf_reason == 0)
+ return NESTED_EXIT_HOST;
+ break;
+ case SVM_EXIT_EXCP_BASE + NM_VECTOR:
+ nm_interception(svm);
+ break;
+ default:
+ break;
+ }
+
+ return NESTED_EXIT_CONTINUE;
+}
+
+/*
+ * If this function returns true, this #vmexit was already handled
+ */
+static int nested_svm_intercept(struct vcpu_svm *svm)
+{
+ u32 exit_code = svm->vmcb->control.exit_code;
+ int vmexit = NESTED_EXIT_HOST;
+
+ switch (exit_code) {
+ case SVM_EXIT_MSR:
+ vmexit = nested_svm_exit_handled_msr(svm);
+ break;
+ case SVM_EXIT_IOIO:
+ vmexit = nested_svm_intercept_ioio(svm);
+ break;
+ case SVM_EXIT_READ_CR0 ... SVM_EXIT_WRITE_CR8: {
+ u32 bit = 1U << (exit_code - SVM_EXIT_READ_CR0);
+ if (svm->nested.intercept_cr & bit)
+ vmexit = NESTED_EXIT_DONE;
+ break;
+ }
+ case SVM_EXIT_READ_DR0 ... SVM_EXIT_WRITE_DR7: {
+ u32 bit = 1U << (exit_code - SVM_EXIT_READ_DR0);
+ if (svm->nested.intercept_dr & bit)
+ vmexit = NESTED_EXIT_DONE;
+ break;
+ }
+ case SVM_EXIT_EXCP_BASE ... SVM_EXIT_EXCP_BASE + 0x1f: {
+ u32 excp_bits = 1 << (exit_code - SVM_EXIT_EXCP_BASE);
+ if (svm->nested.intercept_exceptions & excp_bits)
+ vmexit = NESTED_EXIT_DONE;
+ /* async page fault always cause vmexit */
+ else if ((exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR) &&
+ svm->apf_reason != 0)
+ vmexit = NESTED_EXIT_DONE;
+ break;
+ }
+ case SVM_EXIT_ERR: {
+ vmexit = NESTED_EXIT_DONE;
+ break;
+ }
+ default: {
+ u64 exit_bits = 1ULL << (exit_code - SVM_EXIT_INTR);
+ if (svm->nested.intercept & exit_bits)
+ vmexit = NESTED_EXIT_DONE;
+ }
+ }
+
+ return vmexit;
+}
+
+static int nested_svm_exit_handled(struct vcpu_svm *svm)
+{
+ int vmexit;
+
+ vmexit = nested_svm_intercept(svm);
+
+ if (vmexit == NESTED_EXIT_DONE)
+ nested_svm_vmexit(svm);
+
+ return vmexit;
+}
+
+static inline void copy_vmcb_control_area(struct vmcb *dst_vmcb, struct vmcb *from_vmcb)
+{
+ struct vmcb_control_area *dst = &dst_vmcb->control;
+ struct vmcb_control_area *from = &from_vmcb->control;
+
+ dst->intercept_cr = from->intercept_cr;
+ dst->intercept_dr = from->intercept_dr;
+ dst->intercept_exceptions = from->intercept_exceptions;
+ dst->intercept = from->intercept;
+ dst->iopm_base_pa = from->iopm_base_pa;
+ dst->msrpm_base_pa = from->msrpm_base_pa;
+ dst->tsc_offset = from->tsc_offset;
+ dst->asid = from->asid;
+ dst->tlb_ctl = from->tlb_ctl;
+ dst->int_ctl = from->int_ctl;
+ dst->int_vector = from->int_vector;
+ dst->int_state = from->int_state;
+ dst->exit_code = from->exit_code;
+ dst->exit_code_hi = from->exit_code_hi;
+ dst->exit_info_1 = from->exit_info_1;
+ dst->exit_info_2 = from->exit_info_2;
+ dst->exit_int_info = from->exit_int_info;
+ dst->exit_int_info_err = from->exit_int_info_err;
+ dst->nested_ctl = from->nested_ctl;
+ dst->event_inj = from->event_inj;
+ dst->event_inj_err = from->event_inj_err;
+ dst->nested_cr3 = from->nested_cr3;
+ dst->lbr_ctl = from->lbr_ctl;
+}
+
+static int nested_svm_vmexit(struct vcpu_svm *svm)
+{
+ struct vmcb *nested_vmcb;
+ struct vmcb *hsave = svm->nested.hsave;
+ struct vmcb *vmcb = svm->vmcb;
+ struct page *page;
+
+ trace_kvm_nested_vmexit_inject(vmcb->control.exit_code,
+ vmcb->control.exit_info_1,
+ vmcb->control.exit_info_2,
+ vmcb->control.exit_int_info,
+ vmcb->control.exit_int_info_err,
+ KVM_ISA_SVM);
+
+ nested_vmcb = nested_svm_map(svm, svm->nested.vmcb, &page);
+ if (!nested_vmcb)
+ return 1;
+
+ /* Exit Guest-Mode */
+ leave_guest_mode(&svm->vcpu);
+ svm->nested.vmcb = 0;
+
+ /* Give the current vmcb to the guest */
+ disable_gif(svm);
+
+ nested_vmcb->save.es = vmcb->save.es;
+ nested_vmcb->save.cs = vmcb->save.cs;
+ nested_vmcb->save.ss = vmcb->save.ss;
+ nested_vmcb->save.ds = vmcb->save.ds;
+ nested_vmcb->save.gdtr = vmcb->save.gdtr;
+ nested_vmcb->save.idtr = vmcb->save.idtr;
+ nested_vmcb->save.efer = svm->vcpu.arch.efer;
+ nested_vmcb->save.cr0 = kvm_read_cr0(&svm->vcpu);
+ nested_vmcb->save.cr3 = kvm_read_cr3(&svm->vcpu);
+ nested_vmcb->save.cr2 = vmcb->save.cr2;
+ nested_vmcb->save.cr4 = svm->vcpu.arch.cr4;
+ nested_vmcb->save.rflags = kvm_get_rflags(&svm->vcpu);
+ nested_vmcb->save.rip = vmcb->save.rip;
+ nested_vmcb->save.rsp = vmcb->save.rsp;
+ nested_vmcb->save.rax = vmcb->save.rax;
+ nested_vmcb->save.dr7 = vmcb->save.dr7;
+ nested_vmcb->save.dr6 = vmcb->save.dr6;
+ nested_vmcb->save.cpl = vmcb->save.cpl;
+
+ nested_vmcb->control.int_ctl = vmcb->control.int_ctl;
+ nested_vmcb->control.int_vector = vmcb->control.int_vector;
+ nested_vmcb->control.int_state = vmcb->control.int_state;
+ nested_vmcb->control.exit_code = vmcb->control.exit_code;
+ nested_vmcb->control.exit_code_hi = vmcb->control.exit_code_hi;
+ nested_vmcb->control.exit_info_1 = vmcb->control.exit_info_1;
+ nested_vmcb->control.exit_info_2 = vmcb->control.exit_info_2;
+ nested_vmcb->control.exit_int_info = vmcb->control.exit_int_info;
+ nested_vmcb->control.exit_int_info_err = vmcb->control.exit_int_info_err;
+ nested_vmcb->control.next_rip = vmcb->control.next_rip;
+
+ /*
+ * If we emulate a VMRUN/#VMEXIT in the same host #vmexit cycle we have
+ * to make sure that we do not lose injected events. So check event_inj
+ * here and copy it to exit_int_info if it is valid.
+ * Exit_int_info and event_inj can't be both valid because the case
+ * below only happens on a VMRUN instruction intercept which has
+ * no valid exit_int_info set.
+ */
+ if (vmcb->control.event_inj & SVM_EVTINJ_VALID) {
+ struct vmcb_control_area *nc = &nested_vmcb->control;
+
+ nc->exit_int_info = vmcb->control.event_inj;
+ nc->exit_int_info_err = vmcb->control.event_inj_err;
+ }
+
+ nested_vmcb->control.tlb_ctl = 0;
+ nested_vmcb->control.event_inj = 0;
+ nested_vmcb->control.event_inj_err = 0;
+
+ /* We always set V_INTR_MASKING and remember the old value in hflags */
+ if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
+ nested_vmcb->control.int_ctl &= ~V_INTR_MASKING_MASK;
+
+ /* Restore the original control entries */
+ copy_vmcb_control_area(vmcb, hsave);
+
+ kvm_clear_exception_queue(&svm->vcpu);
+ kvm_clear_interrupt_queue(&svm->vcpu);
+
+ svm->nested.nested_cr3 = 0;
+
+ /* Restore selected save entries */
+ svm->vmcb->save.es = hsave->save.es;
+ svm->vmcb->save.cs = hsave->save.cs;
+ svm->vmcb->save.ss = hsave->save.ss;
+ svm->vmcb->save.ds = hsave->save.ds;
+ svm->vmcb->save.gdtr = hsave->save.gdtr;
+ svm->vmcb->save.idtr = hsave->save.idtr;
+ kvm_set_rflags(&svm->vcpu, hsave->save.rflags);
+ svm_set_efer(&svm->vcpu, hsave->save.efer);
+ svm_set_cr0(&svm->vcpu, hsave->save.cr0 | X86_CR0_PE);
+ svm_set_cr4(&svm->vcpu, hsave->save.cr4);
+ if (npt_enabled) {
+ svm->vmcb->save.cr3 = hsave->save.cr3;
+ svm->vcpu.arch.cr3 = hsave->save.cr3;
+ } else {
+ (void)kvm_set_cr3(&svm->vcpu, hsave->save.cr3);
+ }
+ kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, hsave->save.rax);
+ kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, hsave->save.rsp);
+ kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, hsave->save.rip);
+ svm->vmcb->save.dr7 = 0;
+ svm->vmcb->save.cpl = 0;
+ svm->vmcb->control.exit_int_info = 0;
+
+ mark_all_dirty(svm->vmcb);
+
+ nested_svm_unmap(page);
+
+ nested_svm_uninit_mmu_context(&svm->vcpu);
+ kvm_mmu_reset_context(&svm->vcpu);
+ kvm_mmu_load(&svm->vcpu);
+
+ return 0;
+}
+
+static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm)
+{
+ /*
+ * This function merges the msr permission bitmaps of kvm and the
+ * nested vmcb. It is optimized in that it only merges the parts where
+ * the kvm msr permission bitmap may contain zero bits
+ */
+ int i;
+
+ if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
+ return true;
+
+ for (i = 0; i < MSRPM_OFFSETS; i++) {
+ u32 value, p;
+ u64 offset;
+
+ if (msrpm_offsets[i] == 0xffffffff)
+ break;
+
+ p = msrpm_offsets[i];
+ offset = svm->nested.vmcb_msrpm + (p * 4);
+
+ if (kvm_read_guest(svm->vcpu.kvm, offset, &value, 4))
+ return false;
+
+ svm->nested.msrpm[p] = svm->msrpm[p] | value;
+ }
+
+ svm->vmcb->control.msrpm_base_pa = __pa(svm->nested.msrpm);
+
+ return true;
+}
+
+static bool nested_vmcb_checks(struct vmcb *vmcb)
+{
+ if ((vmcb->control.intercept & (1ULL << INTERCEPT_VMRUN)) == 0)
+ return false;
+
+ if (vmcb->control.asid == 0)
+ return false;
+
+ if (vmcb->control.nested_ctl && !npt_enabled)
+ return false;
+
+ return true;
+}
+
+static bool nested_svm_vmrun(struct vcpu_svm *svm)
+{
+ struct vmcb *nested_vmcb;
+ struct vmcb *hsave = svm->nested.hsave;
+ struct vmcb *vmcb = svm->vmcb;
+ struct page *page;
+ u64 vmcb_gpa;
+
+ vmcb_gpa = svm->vmcb->save.rax;
+
+ nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
+ if (!nested_vmcb)
+ return false;
+
+ if (!nested_vmcb_checks(nested_vmcb)) {
+ nested_vmcb->control.exit_code = SVM_EXIT_ERR;
+ nested_vmcb->control.exit_code_hi = 0;
+ nested_vmcb->control.exit_info_1 = 0;
+ nested_vmcb->control.exit_info_2 = 0;
+
+ nested_svm_unmap(page);
+
+ return false;
+ }
+
+ trace_kvm_nested_vmrun(svm->vmcb->save.rip, vmcb_gpa,
+ nested_vmcb->save.rip,
+ nested_vmcb->control.int_ctl,
+ nested_vmcb->control.event_inj,
+ nested_vmcb->control.nested_ctl);
+
+ trace_kvm_nested_intercepts(nested_vmcb->control.intercept_cr & 0xffff,
+ nested_vmcb->control.intercept_cr >> 16,
+ nested_vmcb->control.intercept_exceptions,
+ nested_vmcb->control.intercept);
+
+ /* Clear internal status */
+ kvm_clear_exception_queue(&svm->vcpu);
+ kvm_clear_interrupt_queue(&svm->vcpu);
+
+ /*
+ * Save the old vmcb, so we don't need to pick what we save, but can
+ * restore everything when a VMEXIT occurs
+ */
+ hsave->save.es = vmcb->save.es;
+ hsave->save.cs = vmcb->save.cs;
+ hsave->save.ss = vmcb->save.ss;
+ hsave->save.ds = vmcb->save.ds;
+ hsave->save.gdtr = vmcb->save.gdtr;
+ hsave->save.idtr = vmcb->save.idtr;
+ hsave->save.efer = svm->vcpu.arch.efer;
+ hsave->save.cr0 = kvm_read_cr0(&svm->vcpu);
+ hsave->save.cr4 = svm->vcpu.arch.cr4;
+ hsave->save.rflags = kvm_get_rflags(&svm->vcpu);
+ hsave->save.rip = kvm_rip_read(&svm->vcpu);
+ hsave->save.rsp = vmcb->save.rsp;
+ hsave->save.rax = vmcb->save.rax;
+ if (npt_enabled)
+ hsave->save.cr3 = vmcb->save.cr3;
+ else
+ hsave->save.cr3 = kvm_read_cr3(&svm->vcpu);
+
+ copy_vmcb_control_area(hsave, vmcb);
+
+ if (kvm_get_rflags(&svm->vcpu) & X86_EFLAGS_IF)
+ svm->vcpu.arch.hflags |= HF_HIF_MASK;
+ else
+ svm->vcpu.arch.hflags &= ~HF_HIF_MASK;
+
+ if (nested_vmcb->control.nested_ctl) {
+ kvm_mmu_unload(&svm->vcpu);
+ svm->nested.nested_cr3 = nested_vmcb->control.nested_cr3;
+ nested_svm_init_mmu_context(&svm->vcpu);
+ }
+
+ /* Load the nested guest state */
+ svm->vmcb->save.es = nested_vmcb->save.es;
+ svm->vmcb->save.cs = nested_vmcb->save.cs;
+ svm->vmcb->save.ss = nested_vmcb->save.ss;
+ svm->vmcb->save.ds = nested_vmcb->save.ds;
+ svm->vmcb->save.gdtr = nested_vmcb->save.gdtr;
+ svm->vmcb->save.idtr = nested_vmcb->save.idtr;
+ kvm_set_rflags(&svm->vcpu, nested_vmcb->save.rflags);
+ svm_set_efer(&svm->vcpu, nested_vmcb->save.efer);
+ svm_set_cr0(&svm->vcpu, nested_vmcb->save.cr0);
+ svm_set_cr4(&svm->vcpu, nested_vmcb->save.cr4);
+ if (npt_enabled) {
+ svm->vmcb->save.cr3 = nested_vmcb->save.cr3;
+ svm->vcpu.arch.cr3 = nested_vmcb->save.cr3;
+ } else
+ (void)kvm_set_cr3(&svm->vcpu, nested_vmcb->save.cr3);
+
+ /* Guest paging mode is active - reset mmu */
+ kvm_mmu_reset_context(&svm->vcpu);
+
+ svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = nested_vmcb->save.cr2;
+ kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, nested_vmcb->save.rax);
+ kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, nested_vmcb->save.rsp);
+ kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, nested_vmcb->save.rip);
+
+ /* In case we don't even reach vcpu_run, the fields are not updated */
+ svm->vmcb->save.rax = nested_vmcb->save.rax;
+ svm->vmcb->save.rsp = nested_vmcb->save.rsp;
+ svm->vmcb->save.rip = nested_vmcb->save.rip;
+ svm->vmcb->save.dr7 = nested_vmcb->save.dr7;
+ svm->vmcb->save.dr6 = nested_vmcb->save.dr6;
+ svm->vmcb->save.cpl = nested_vmcb->save.cpl;
+
+ svm->nested.vmcb_msrpm = nested_vmcb->control.msrpm_base_pa & ~0x0fffULL;
+ svm->nested.vmcb_iopm = nested_vmcb->control.iopm_base_pa & ~0x0fffULL;
+
+ /* cache intercepts */
+ svm->nested.intercept_cr = nested_vmcb->control.intercept_cr;
+ svm->nested.intercept_dr = nested_vmcb->control.intercept_dr;
+ svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions;
+ svm->nested.intercept = nested_vmcb->control.intercept;
+
+ svm_flush_tlb(&svm->vcpu);
+ svm->vmcb->control.int_ctl = nested_vmcb->control.int_ctl | V_INTR_MASKING_MASK;
+ if (nested_vmcb->control.int_ctl & V_INTR_MASKING_MASK)
+ svm->vcpu.arch.hflags |= HF_VINTR_MASK;
+ else
+ svm->vcpu.arch.hflags &= ~HF_VINTR_MASK;
+
+ if (svm->vcpu.arch.hflags & HF_VINTR_MASK) {
+ /* We only want the cr8 intercept bits of the guest */
+ clr_cr_intercept(svm, INTERCEPT_CR8_READ);
+ clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);
+ }
+
+ /* We don't want to see VMMCALLs from a nested guest */
+ clr_intercept(svm, INTERCEPT_VMMCALL);
+
+ svm->vmcb->control.lbr_ctl = nested_vmcb->control.lbr_ctl;
+ svm->vmcb->control.int_vector = nested_vmcb->control.int_vector;
+ svm->vmcb->control.int_state = nested_vmcb->control.int_state;
+ svm->vmcb->control.tsc_offset += nested_vmcb->control.tsc_offset;
+ svm->vmcb->control.event_inj = nested_vmcb->control.event_inj;
+ svm->vmcb->control.event_inj_err = nested_vmcb->control.event_inj_err;
+
+ nested_svm_unmap(page);
+
+ /* Enter Guest-Mode */
+ enter_guest_mode(&svm->vcpu);
+
+ /*
+ * Merge guest and host intercepts - must be called with vcpu in
+ * guest-mode to take affect here
+ */
+ recalc_intercepts(svm);
+
+ svm->nested.vmcb = vmcb_gpa;
+
+ enable_gif(svm);
+
+ mark_all_dirty(svm->vmcb);
+
+ return true;
+}
+
+static void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
+{
+ to_vmcb->save.fs = from_vmcb->save.fs;
+ to_vmcb->save.gs = from_vmcb->save.gs;
+ to_vmcb->save.tr = from_vmcb->save.tr;
+ to_vmcb->save.ldtr = from_vmcb->save.ldtr;
+ to_vmcb->save.kernel_gs_base = from_vmcb->save.kernel_gs_base;
+ to_vmcb->save.star = from_vmcb->save.star;
+ to_vmcb->save.lstar = from_vmcb->save.lstar;
+ to_vmcb->save.cstar = from_vmcb->save.cstar;
+ to_vmcb->save.sfmask = from_vmcb->save.sfmask;
+ to_vmcb->save.sysenter_cs = from_vmcb->save.sysenter_cs;
+ to_vmcb->save.sysenter_esp = from_vmcb->save.sysenter_esp;
+ to_vmcb->save.sysenter_eip = from_vmcb->save.sysenter_eip;
+}
+
+static int vmload_interception(struct vcpu_svm *svm)
+{
+ struct vmcb *nested_vmcb;
+ struct page *page;
+
+ if (nested_svm_check_permissions(svm))
+ return 1;
+
+ nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
+ if (!nested_vmcb)
+ return 1;
+
+ svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
+ skip_emulated_instruction(&svm->vcpu);
+
+ nested_svm_vmloadsave(nested_vmcb, svm->vmcb);
+ nested_svm_unmap(page);
+
+ return 1;
+}
+
+static int vmsave_interception(struct vcpu_svm *svm)
+{
+ struct vmcb *nested_vmcb;
+ struct page *page;
+
+ if (nested_svm_check_permissions(svm))
+ return 1;
+
+ nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
+ if (!nested_vmcb)
+ return 1;
+
+ svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
+ skip_emulated_instruction(&svm->vcpu);
+
+ nested_svm_vmloadsave(svm->vmcb, nested_vmcb);
+ nested_svm_unmap(page);
+
+ return 1;
+}
+
+static int vmrun_interception(struct vcpu_svm *svm)
+{
+ if (nested_svm_check_permissions(svm))
+ return 1;
+
+ /* Save rip after vmrun instruction */
+ kvm_rip_write(&svm->vcpu, kvm_rip_read(&svm->vcpu) + 3);
+
+ if (!nested_svm_vmrun(svm))
+ return 1;
+
+ if (!nested_svm_vmrun_msrpm(svm))
+ goto failed;
+
+ return 1;
+
+failed:
+
+ svm->vmcb->control.exit_code = SVM_EXIT_ERR;
+ svm->vmcb->control.exit_code_hi = 0;
+ svm->vmcb->control.exit_info_1 = 0;
+ svm->vmcb->control.exit_info_2 = 0;
+
+ nested_svm_vmexit(svm);
+
+ return 1;
+}
+
+static int stgi_interception(struct vcpu_svm *svm)
+{
+ if (nested_svm_check_permissions(svm))
+ return 1;
+
+ svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
+ skip_emulated_instruction(&svm->vcpu);
+ kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
+
+ enable_gif(svm);
+
+ return 1;
+}
+
+static int clgi_interception(struct vcpu_svm *svm)
+{
+ if (nested_svm_check_permissions(svm))
+ return 1;
+
+ svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
+ skip_emulated_instruction(&svm->vcpu);
+
+ disable_gif(svm);
+
+ /* After a CLGI no interrupts should come */
+ svm_clear_vintr(svm);
+ svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
+
+ mark_dirty(svm->vmcb, VMCB_INTR);
+
+ return 1;
+}
+
+static int invlpga_interception(struct vcpu_svm *svm)
+{
+ struct kvm_vcpu *vcpu = &svm->vcpu;
+
+ trace_kvm_invlpga(svm->vmcb->save.rip, kvm_register_read(&svm->vcpu, VCPU_REGS_RCX),
+ kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
+
+ /* Let's treat INVLPGA the same as INVLPG (can be optimized!) */
+ kvm_mmu_invlpg(vcpu, kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
+
+ svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
+ skip_emulated_instruction(&svm->vcpu);
+ return 1;
+}
+
+static int skinit_interception(struct vcpu_svm *svm)
+{
+ trace_kvm_skinit(svm->vmcb->save.rip, kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
+
+ kvm_queue_exception(&svm->vcpu, UD_VECTOR);
+ return 1;
+}
+
+static int wbinvd_interception(struct vcpu_svm *svm)
+{
+ kvm_emulate_wbinvd(&svm->vcpu);
+ return 1;
+}
+
+static int xsetbv_interception(struct vcpu_svm *svm)
+{
+ u64 new_bv = kvm_read_edx_eax(&svm->vcpu);
+ u32 index = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX);
+
+ if (kvm_set_xcr(&svm->vcpu, index, new_bv) == 0) {
+ svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
+ skip_emulated_instruction(&svm->vcpu);
+ }
+
+ return 1;
+}
+
+static int task_switch_interception(struct vcpu_svm *svm)
+{
+ u16 tss_selector;
+ int reason;
+ int int_type = svm->vmcb->control.exit_int_info &
+ SVM_EXITINTINFO_TYPE_MASK;
+ int int_vec = svm->vmcb->control.exit_int_info & SVM_EVTINJ_VEC_MASK;
+ uint32_t type =
+ svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_TYPE_MASK;
+ uint32_t idt_v =
+ svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_VALID;
+ bool has_error_code = false;
+ u32 error_code = 0;
+
+ tss_selector = (u16)svm->vmcb->control.exit_info_1;
+
+ if (svm->vmcb->control.exit_info_2 &
+ (1ULL << SVM_EXITINFOSHIFT_TS_REASON_IRET))
+ reason = TASK_SWITCH_IRET;
+ else if (svm->vmcb->control.exit_info_2 &
+ (1ULL << SVM_EXITINFOSHIFT_TS_REASON_JMP))
+ reason = TASK_SWITCH_JMP;
+ else if (idt_v)
+ reason = TASK_SWITCH_GATE;
+ else
+ reason = TASK_SWITCH_CALL;
+
+ if (reason == TASK_SWITCH_GATE) {
+ switch (type) {
+ case SVM_EXITINTINFO_TYPE_NMI:
+ svm->vcpu.arch.nmi_injected = false;
+ break;
+ case SVM_EXITINTINFO_TYPE_EXEPT:
+ if (svm->vmcb->control.exit_info_2 &
+ (1ULL << SVM_EXITINFOSHIFT_TS_HAS_ERROR_CODE)) {
+ has_error_code = true;
+ error_code =
+ (u32)svm->vmcb->control.exit_info_2;
+ }
+ kvm_clear_exception_queue(&svm->vcpu);
+ break;
+ case SVM_EXITINTINFO_TYPE_INTR:
+ kvm_clear_interrupt_queue(&svm->vcpu);
+ break;
+ default:
+ break;
+ }
+ }
+
+ if (reason != TASK_SWITCH_GATE ||
+ int_type == SVM_EXITINTINFO_TYPE_SOFT ||
+ (int_type == SVM_EXITINTINFO_TYPE_EXEPT &&
+ (int_vec == OF_VECTOR || int_vec == BP_VECTOR)))
+ skip_emulated_instruction(&svm->vcpu);
+
+ if (int_type != SVM_EXITINTINFO_TYPE_SOFT)
+ int_vec = -1;
+
+ if (kvm_task_switch(&svm->vcpu, tss_selector, int_vec, reason,
+ has_error_code, error_code) == EMULATE_FAIL) {
+ svm->vcpu.run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
+ svm->vcpu.run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
+ svm->vcpu.run->internal.ndata = 0;
+ return 0;
+ }
+ return 1;
+}
+
+static int cpuid_interception(struct vcpu_svm *svm)
+{
+ svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
+ kvm_emulate_cpuid(&svm->vcpu);
+ return 1;
+}
+
+static int iret_interception(struct vcpu_svm *svm)
+{
+ ++svm->vcpu.stat.nmi_window_exits;
+ clr_intercept(svm, INTERCEPT_IRET);
+ svm->vcpu.arch.hflags |= HF_IRET_MASK;
+ svm->nmi_iret_rip = kvm_rip_read(&svm->vcpu);
+ kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
+ return 1;
+}
+
+static int invlpg_interception(struct vcpu_svm *svm)
+{
+ if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
+ return emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
+
+ kvm_mmu_invlpg(&svm->vcpu, svm->vmcb->control.exit_info_1);
+ skip_emulated_instruction(&svm->vcpu);
+ return 1;
+}
+
+static int emulate_on_interception(struct vcpu_svm *svm)
+{
+ return emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
+}
+
+static int rdpmc_interception(struct vcpu_svm *svm)
+{
+ int err;
+
+ if (!static_cpu_has(X86_FEATURE_NRIPS))
+ return emulate_on_interception(svm);
+
+ err = kvm_rdpmc(&svm->vcpu);
+ kvm_complete_insn_gp(&svm->vcpu, err);
+
+ return 1;
+}
+
+static bool check_selective_cr0_intercepted(struct vcpu_svm *svm,
+ unsigned long val)
+{
+ unsigned long cr0 = svm->vcpu.arch.cr0;
+ bool ret = false;
+ u64 intercept;
+
+ intercept = svm->nested.intercept;
+
+ if (!is_guest_mode(&svm->vcpu) ||
+ (!(intercept & (1ULL << INTERCEPT_SELECTIVE_CR0))))
+ return false;
+
+ cr0 &= ~SVM_CR0_SELECTIVE_MASK;
+ val &= ~SVM_CR0_SELECTIVE_MASK;
+
+ if (cr0 ^ val) {
+ svm->vmcb->control.exit_code = SVM_EXIT_CR0_SEL_WRITE;
+ ret = (nested_svm_exit_handled(svm) == NESTED_EXIT_DONE);
+ }
+
+ return ret;
+}
+
+#define CR_VALID (1ULL << 63)
+
+static int cr_interception(struct vcpu_svm *svm)
+{
+ int reg, cr;
+ unsigned long val;
+ int err;
+
+ if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
+ return emulate_on_interception(svm);
+
+ if (unlikely((svm->vmcb->control.exit_info_1 & CR_VALID) == 0))
+ return emulate_on_interception(svm);
+
+ reg = svm->vmcb->control.exit_info_1 & SVM_EXITINFO_REG_MASK;
+ if (svm->vmcb->control.exit_code == SVM_EXIT_CR0_SEL_WRITE)
+ cr = SVM_EXIT_WRITE_CR0 - SVM_EXIT_READ_CR0;
+ else
+ cr = svm->vmcb->control.exit_code - SVM_EXIT_READ_CR0;
+
+ err = 0;
+ if (cr >= 16) { /* mov to cr */
+ cr -= 16;
+ val = kvm_register_read(&svm->vcpu, reg);
+ switch (cr) {
+ case 0:
+ if (!check_selective_cr0_intercepted(svm, val))
+ err = kvm_set_cr0(&svm->vcpu, val);
+ else
+ return 1;
+
+ break;
+ case 3:
+ err = kvm_set_cr3(&svm->vcpu, val);
+ break;
+ case 4:
+ err = kvm_set_cr4(&svm->vcpu, val);
+ break;
+ case 8:
+ err = kvm_set_cr8(&svm->vcpu, val);
+ break;
+ default:
+ WARN(1, "unhandled write to CR%d", cr);
+ kvm_queue_exception(&svm->vcpu, UD_VECTOR);
+ return 1;
+ }
+ } else { /* mov from cr */
+ switch (cr) {
+ case 0:
+ val = kvm_read_cr0(&svm->vcpu);
+ break;
+ case 2:
+ val = svm->vcpu.arch.cr2;
+ break;
+ case 3:
+ val = kvm_read_cr3(&svm->vcpu);
+ break;
+ case 4:
+ val = kvm_read_cr4(&svm->vcpu);
+ break;
+ case 8:
+ val = kvm_get_cr8(&svm->vcpu);
+ break;
+ default:
+ WARN(1, "unhandled read from CR%d", cr);
+ kvm_queue_exception(&svm->vcpu, UD_VECTOR);
+ return 1;
+ }
+ kvm_register_write(&svm->vcpu, reg, val);
+ }
+ kvm_complete_insn_gp(&svm->vcpu, err);
+
+ return 1;
+}
+
+static int dr_interception(struct vcpu_svm *svm)
+{
+ int reg, dr;
+ unsigned long val;
+
+ if (svm->vcpu.guest_debug == 0) {
+ /*
+ * No more DR vmexits; force a reload of the debug registers
+ * and reenter on this instruction. The next vmexit will
+ * retrieve the full state of the debug registers.
+ */
+ clr_dr_intercepts(svm);
+ svm->vcpu.arch.switch_db_regs |= KVM_DEBUGREG_WONT_EXIT;
+ return 1;
+ }
+
+ if (!boot_cpu_has(X86_FEATURE_DECODEASSISTS))
+ return emulate_on_interception(svm);
+
+ reg = svm->vmcb->control.exit_info_1 & SVM_EXITINFO_REG_MASK;
+ dr = svm->vmcb->control.exit_code - SVM_EXIT_READ_DR0;
+
+ if (dr >= 16) { /* mov to DRn */
+ if (!kvm_require_dr(&svm->vcpu, dr - 16))
+ return 1;
+ val = kvm_register_read(&svm->vcpu, reg);
+ kvm_set_dr(&svm->vcpu, dr - 16, val);
+ } else {
+ if (!kvm_require_dr(&svm->vcpu, dr))
+ return 1;
+ kvm_get_dr(&svm->vcpu, dr, &val);
+ kvm_register_write(&svm->vcpu, reg, val);
+ }
+
+ skip_emulated_instruction(&svm->vcpu);
+
+ return 1;
+}
+
+static int cr8_write_interception(struct vcpu_svm *svm)
+{
+ struct kvm_run *kvm_run = svm->vcpu.run;
+ int r;
+
+ u8 cr8_prev = kvm_get_cr8(&svm->vcpu);
+ /* instruction emulation calls kvm_set_cr8() */
+ r = cr_interception(svm);
+ if (irqchip_in_kernel(svm->vcpu.kvm))
+ return r;
+ if (cr8_prev <= kvm_get_cr8(&svm->vcpu))
+ return r;
+ kvm_run->exit_reason = KVM_EXIT_SET_TPR;
+ return 0;
+}
+
+static u64 svm_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc)
+{
+ struct vmcb *vmcb = get_host_vmcb(to_svm(vcpu));
+ return vmcb->control.tsc_offset +
+ svm_scale_tsc(vcpu, host_tsc);
+}
+
+static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ switch (ecx) {
+ case MSR_IA32_TSC: {
+ *data = svm->vmcb->control.tsc_offset +
+ svm_scale_tsc(vcpu, native_read_tsc());
+
+ break;
+ }
+ case MSR_STAR:
+ *data = svm->vmcb->save.star;
+ break;
+#ifdef CONFIG_X86_64
+ case MSR_LSTAR:
+ *data = svm->vmcb->save.lstar;
+ break;
+ case MSR_CSTAR:
+ *data = svm->vmcb->save.cstar;
+ break;
+ case MSR_KERNEL_GS_BASE:
+ *data = svm->vmcb->save.kernel_gs_base;
+ break;
+ case MSR_SYSCALL_MASK:
+ *data = svm->vmcb->save.sfmask;
+ break;
+#endif
+ case MSR_IA32_SYSENTER_CS:
+ *data = svm->vmcb->save.sysenter_cs;
+ break;
+ case MSR_IA32_SYSENTER_EIP:
+ *data = svm->sysenter_eip;
+ break;
+ case MSR_IA32_SYSENTER_ESP:
+ *data = svm->sysenter_esp;
+ break;
+ /*
+ * Nobody will change the following 5 values in the VMCB so we can
+ * safely return them on rdmsr. They will always be 0 until LBRV is
+ * implemented.
+ */
+ case MSR_IA32_DEBUGCTLMSR:
+ *data = svm->vmcb->save.dbgctl;
+ break;
+ case MSR_IA32_LASTBRANCHFROMIP:
+ *data = svm->vmcb->save.br_from;
+ break;
+ case MSR_IA32_LASTBRANCHTOIP:
+ *data = svm->vmcb->save.br_to;
+ break;
+ case MSR_IA32_LASTINTFROMIP:
+ *data = svm->vmcb->save.last_excp_from;
+ break;
+ case MSR_IA32_LASTINTTOIP:
+ *data = svm->vmcb->save.last_excp_to;
+ break;
+ case MSR_VM_HSAVE_PA:
+ *data = svm->nested.hsave_msr;
+ break;
+ case MSR_VM_CR:
+ *data = svm->nested.vm_cr_msr;
+ break;
+ case MSR_IA32_UCODE_REV:
+ *data = 0x01000065;
+ break;
+ default:
+ return kvm_get_msr_common(vcpu, ecx, data);
+ }
+ return 0;
+}
+
+static int rdmsr_interception(struct vcpu_svm *svm)
+{
+ u32 ecx = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX);
+ u64 data;
+
+ if (svm_get_msr(&svm->vcpu, ecx, &data)) {
+ trace_kvm_msr_read_ex(ecx);
+ kvm_inject_gp(&svm->vcpu, 0);
+ } else {
+ trace_kvm_msr_read(ecx, data);
+
+ kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, data & 0xffffffff);
+ kvm_register_write(&svm->vcpu, VCPU_REGS_RDX, data >> 32);
+ svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
+ skip_emulated_instruction(&svm->vcpu);
+ }
+ return 1;
+}
+
+static int svm_set_vm_cr(struct kvm_vcpu *vcpu, u64 data)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+ int svm_dis, chg_mask;
+
+ if (data & ~SVM_VM_CR_VALID_MASK)
+ return 1;
+
+ chg_mask = SVM_VM_CR_VALID_MASK;
+
+ if (svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK)
+ chg_mask &= ~(SVM_VM_CR_SVM_LOCK_MASK | SVM_VM_CR_SVM_DIS_MASK);
+
+ svm->nested.vm_cr_msr &= ~chg_mask;
+ svm->nested.vm_cr_msr |= (data & chg_mask);
+
+ svm_dis = svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK;
+
+ /* check for svm_disable while efer.svme is set */
+ if (svm_dis && (vcpu->arch.efer & EFER_SVME))
+ return 1;
+
+ return 0;
+}
+
+static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ u32 ecx = msr->index;
+ u64 data = msr->data;
+ switch (ecx) {
+ case MSR_IA32_TSC:
+ kvm_write_tsc(vcpu, msr);
+ break;
+ case MSR_STAR:
+ svm->vmcb->save.star = data;
+ break;
+#ifdef CONFIG_X86_64
+ case MSR_LSTAR:
+ svm->vmcb->save.lstar = data;
+ break;
+ case MSR_CSTAR:
+ svm->vmcb->save.cstar = data;
+ break;
+ case MSR_KERNEL_GS_BASE:
+ svm->vmcb->save.kernel_gs_base = data;
+ break;
+ case MSR_SYSCALL_MASK:
+ svm->vmcb->save.sfmask = data;
+ break;
+#endif
+ case MSR_IA32_SYSENTER_CS:
+ svm->vmcb->save.sysenter_cs = data;
+ break;
+ case MSR_IA32_SYSENTER_EIP:
+ svm->sysenter_eip = data;
+ svm->vmcb->save.sysenter_eip = data;
+ break;
+ case MSR_IA32_SYSENTER_ESP:
+ svm->sysenter_esp = data;
+ svm->vmcb->save.sysenter_esp = data;
+ break;
+ case MSR_IA32_DEBUGCTLMSR:
+ if (!boot_cpu_has(X86_FEATURE_LBRV)) {
+ vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTL 0x%llx, nop\n",
+ __func__, data);
+ break;
+ }
+ if (data & DEBUGCTL_RESERVED_BITS)
+ return 1;
+
+ svm->vmcb->save.dbgctl = data;
+ mark_dirty(svm->vmcb, VMCB_LBR);
+ if (data & (1ULL<<0))
+ svm_enable_lbrv(svm);
+ else
+ svm_disable_lbrv(svm);
+ break;
+ case MSR_VM_HSAVE_PA:
+ svm->nested.hsave_msr = data;
+ break;
+ case MSR_VM_CR:
+ return svm_set_vm_cr(vcpu, data);
+ case MSR_VM_IGNNE:
+ vcpu_unimpl(vcpu, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx, data);
+ break;
+ default:
+ return kvm_set_msr_common(vcpu, msr);
+ }
+ return 0;
+}
+
+static int wrmsr_interception(struct vcpu_svm *svm)
+{
+ struct msr_data msr;
+ u32 ecx = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX);
+ u64 data = kvm_read_edx_eax(&svm->vcpu);
+
+ msr.data = data;
+ msr.index = ecx;
+ msr.host_initiated = false;
+
+ svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
+ if (kvm_set_msr(&svm->vcpu, &msr)) {
+ trace_kvm_msr_write_ex(ecx, data);
+ kvm_inject_gp(&svm->vcpu, 0);
+ } else {
+ trace_kvm_msr_write(ecx, data);
+ skip_emulated_instruction(&svm->vcpu);
+ }
+ return 1;
+}
+
+static int msr_interception(struct vcpu_svm *svm)
+{
+ if (svm->vmcb->control.exit_info_1)
+ return wrmsr_interception(svm);
+ else
+ return rdmsr_interception(svm);
+}
+
+static int interrupt_window_interception(struct vcpu_svm *svm)
+{
+ struct kvm_run *kvm_run = svm->vcpu.run;
+
+ kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
+ svm_clear_vintr(svm);
+ svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
+ mark_dirty(svm->vmcb, VMCB_INTR);
+ ++svm->vcpu.stat.irq_window_exits;
+ /*
+ * If the user space waits to inject interrupts, exit as soon as
+ * possible
+ */
+ if (!irqchip_in_kernel(svm->vcpu.kvm) &&
+ kvm_run->request_interrupt_window &&
+ !kvm_cpu_has_interrupt(&svm->vcpu)) {
+ kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
+ return 0;
+ }
+
+ return 1;
+}
+
+static int pause_interception(struct vcpu_svm *svm)
+{
+ kvm_vcpu_on_spin(&(svm->vcpu));
+ return 1;
+}
+
+static int nop_interception(struct vcpu_svm *svm)
+{
+ skip_emulated_instruction(&(svm->vcpu));
+ return 1;
+}
+
+static int monitor_interception(struct vcpu_svm *svm)
+{
+ printk_once(KERN_WARNING "kvm: MONITOR instruction emulated as NOP!\n");
+ return nop_interception(svm);
+}
+
+static int mwait_interception(struct vcpu_svm *svm)
+{
+ printk_once(KERN_WARNING "kvm: MWAIT instruction emulated as NOP!\n");
+ return nop_interception(svm);
+}
+
+static int (*const svm_exit_handlers[])(struct vcpu_svm *svm) = {
+ [SVM_EXIT_READ_CR0] = cr_interception,
+ [SVM_EXIT_READ_CR3] = cr_interception,
+ [SVM_EXIT_READ_CR4] = cr_interception,
+ [SVM_EXIT_READ_CR8] = cr_interception,
+ [SVM_EXIT_CR0_SEL_WRITE] = cr_interception,
+ [SVM_EXIT_WRITE_CR0] = cr_interception,
+ [SVM_EXIT_WRITE_CR3] = cr_interception,
+ [SVM_EXIT_WRITE_CR4] = cr_interception,
+ [SVM_EXIT_WRITE_CR8] = cr8_write_interception,
+ [SVM_EXIT_READ_DR0] = dr_interception,
+ [SVM_EXIT_READ_DR1] = dr_interception,
+ [SVM_EXIT_READ_DR2] = dr_interception,
+ [SVM_EXIT_READ_DR3] = dr_interception,
+ [SVM_EXIT_READ_DR4] = dr_interception,
+ [SVM_EXIT_READ_DR5] = dr_interception,
+ [SVM_EXIT_READ_DR6] = dr_interception,
+ [SVM_EXIT_READ_DR7] = dr_interception,
+ [SVM_EXIT_WRITE_DR0] = dr_interception,
+ [SVM_EXIT_WRITE_DR1] = dr_interception,
+ [SVM_EXIT_WRITE_DR2] = dr_interception,
+ [SVM_EXIT_WRITE_DR3] = dr_interception,
+ [SVM_EXIT_WRITE_DR4] = dr_interception,
+ [SVM_EXIT_WRITE_DR5] = dr_interception,
+ [SVM_EXIT_WRITE_DR6] = dr_interception,
+ [SVM_EXIT_WRITE_DR7] = dr_interception,
+ [SVM_EXIT_EXCP_BASE + DB_VECTOR] = db_interception,
+ [SVM_EXIT_EXCP_BASE + BP_VECTOR] = bp_interception,
+ [SVM_EXIT_EXCP_BASE + UD_VECTOR] = ud_interception,
+ [SVM_EXIT_EXCP_BASE + PF_VECTOR] = pf_interception,
+ [SVM_EXIT_EXCP_BASE + NM_VECTOR] = nm_interception,
+ [SVM_EXIT_EXCP_BASE + MC_VECTOR] = mc_interception,
+ [SVM_EXIT_INTR] = intr_interception,
+ [SVM_EXIT_NMI] = nmi_interception,
+ [SVM_EXIT_SMI] = nop_on_interception,
+ [SVM_EXIT_INIT] = nop_on_interception,
+ [SVM_EXIT_VINTR] = interrupt_window_interception,
+ [SVM_EXIT_RDPMC] = rdpmc_interception,
+ [SVM_EXIT_CPUID] = cpuid_interception,
+ [SVM_EXIT_IRET] = iret_interception,
+ [SVM_EXIT_INVD] = emulate_on_interception,
+ [SVM_EXIT_PAUSE] = pause_interception,
+ [SVM_EXIT_HLT] = halt_interception,
+ [SVM_EXIT_INVLPG] = invlpg_interception,
+ [SVM_EXIT_INVLPGA] = invlpga_interception,
+ [SVM_EXIT_IOIO] = io_interception,
+ [SVM_EXIT_MSR] = msr_interception,
+ [SVM_EXIT_TASK_SWITCH] = task_switch_interception,
+ [SVM_EXIT_SHUTDOWN] = shutdown_interception,
+ [SVM_EXIT_VMRUN] = vmrun_interception,
+ [SVM_EXIT_VMMCALL] = vmmcall_interception,
+ [SVM_EXIT_VMLOAD] = vmload_interception,
+ [SVM_EXIT_VMSAVE] = vmsave_interception,
+ [SVM_EXIT_STGI] = stgi_interception,
+ [SVM_EXIT_CLGI] = clgi_interception,
+ [SVM_EXIT_SKINIT] = skinit_interception,
+ [SVM_EXIT_WBINVD] = wbinvd_interception,
+ [SVM_EXIT_MONITOR] = monitor_interception,
+ [SVM_EXIT_MWAIT] = mwait_interception,
+ [SVM_EXIT_XSETBV] = xsetbv_interception,
+ [SVM_EXIT_NPF] = pf_interception,
+};
+
+static void dump_vmcb(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+ struct vmcb_control_area *control = &svm->vmcb->control;
+ struct vmcb_save_area *save = &svm->vmcb->save;
+
+ pr_err("VMCB Control Area:\n");
+ pr_err("%-20s%04x\n", "cr_read:", control->intercept_cr & 0xffff);
+ pr_err("%-20s%04x\n", "cr_write:", control->intercept_cr >> 16);
+ pr_err("%-20s%04x\n", "dr_read:", control->intercept_dr & 0xffff);
+ pr_err("%-20s%04x\n", "dr_write:", control->intercept_dr >> 16);
+ pr_err("%-20s%08x\n", "exceptions:", control->intercept_exceptions);
+ pr_err("%-20s%016llx\n", "intercepts:", control->intercept);
+ pr_err("%-20s%d\n", "pause filter count:", control->pause_filter_count);
+ pr_err("%-20s%016llx\n", "iopm_base_pa:", control->iopm_base_pa);
+ pr_err("%-20s%016llx\n", "msrpm_base_pa:", control->msrpm_base_pa);
+ pr_err("%-20s%016llx\n", "tsc_offset:", control->tsc_offset);
+ pr_err("%-20s%d\n", "asid:", control->asid);
+ pr_err("%-20s%d\n", "tlb_ctl:", control->tlb_ctl);
+ pr_err("%-20s%08x\n", "int_ctl:", control->int_ctl);
+ pr_err("%-20s%08x\n", "int_vector:", control->int_vector);
+ pr_err("%-20s%08x\n", "int_state:", control->int_state);
+ pr_err("%-20s%08x\n", "exit_code:", control->exit_code);
+ pr_err("%-20s%016llx\n", "exit_info1:", control->exit_info_1);
+ pr_err("%-20s%016llx\n", "exit_info2:", control->exit_info_2);
+ pr_err("%-20s%08x\n", "exit_int_info:", control->exit_int_info);
+ pr_err("%-20s%08x\n", "exit_int_info_err:", control->exit_int_info_err);
+ pr_err("%-20s%lld\n", "nested_ctl:", control->nested_ctl);
+ pr_err("%-20s%016llx\n", "nested_cr3:", control->nested_cr3);
+ pr_err("%-20s%08x\n", "event_inj:", control->event_inj);
+ pr_err("%-20s%08x\n", "event_inj_err:", control->event_inj_err);
+ pr_err("%-20s%lld\n", "lbr_ctl:", control->lbr_ctl);
+ pr_err("%-20s%016llx\n", "next_rip:", control->next_rip);
+ pr_err("VMCB State Save Area:\n");
+ pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
+ "es:",
+ save->es.selector, save->es.attrib,
+ save->es.limit, save->es.base);
+ pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
+ "cs:",
+ save->cs.selector, save->cs.attrib,
+ save->cs.limit, save->cs.base);
+ pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
+ "ss:",
+ save->ss.selector, save->ss.attrib,
+ save->ss.limit, save->ss.base);
+ pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
+ "ds:",
+ save->ds.selector, save->ds.attrib,
+ save->ds.limit, save->ds.base);
+ pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
+ "fs:",
+ save->fs.selector, save->fs.attrib,
+ save->fs.limit, save->fs.base);
+ pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
+ "gs:",
+ save->gs.selector, save->gs.attrib,
+ save->gs.limit, save->gs.base);
+ pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
+ "gdtr:",
+ save->gdtr.selector, save->gdtr.attrib,
+ save->gdtr.limit, save->gdtr.base);
+ pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
+ "ldtr:",
+ save->ldtr.selector, save->ldtr.attrib,
+ save->ldtr.limit, save->ldtr.base);
+ pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
+ "idtr:",
+ save->idtr.selector, save->idtr.attrib,
+ save->idtr.limit, save->idtr.base);
+ pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
+ "tr:",
+ save->tr.selector, save->tr.attrib,
+ save->tr.limit, save->tr.base);
+ pr_err("cpl: %d efer: %016llx\n",
+ save->cpl, save->efer);
+ pr_err("%-15s %016llx %-13s %016llx\n",
+ "cr0:", save->cr0, "cr2:", save->cr2);
+ pr_err("%-15s %016llx %-13s %016llx\n",
+ "cr3:", save->cr3, "cr4:", save->cr4);
+ pr_err("%-15s %016llx %-13s %016llx\n",
+ "dr6:", save->dr6, "dr7:", save->dr7);
+ pr_err("%-15s %016llx %-13s %016llx\n",
+ "rip:", save->rip, "rflags:", save->rflags);
+ pr_err("%-15s %016llx %-13s %016llx\n",
+ "rsp:", save->rsp, "rax:", save->rax);
+ pr_err("%-15s %016llx %-13s %016llx\n",
+ "star:", save->star, "lstar:", save->lstar);
+ pr_err("%-15s %016llx %-13s %016llx\n",
+ "cstar:", save->cstar, "sfmask:", save->sfmask);
+ pr_err("%-15s %016llx %-13s %016llx\n",
+ "kernel_gs_base:", save->kernel_gs_base,
+ "sysenter_cs:", save->sysenter_cs);
+ pr_err("%-15s %016llx %-13s %016llx\n",
+ "sysenter_esp:", save->sysenter_esp,
+ "sysenter_eip:", save->sysenter_eip);
+ pr_err("%-15s %016llx %-13s %016llx\n",
+ "gpat:", save->g_pat, "dbgctl:", save->dbgctl);
+ pr_err("%-15s %016llx %-13s %016llx\n",
+ "br_from:", save->br_from, "br_to:", save->br_to);
+ pr_err("%-15s %016llx %-13s %016llx\n",
+ "excp_from:", save->last_excp_from,
+ "excp_to:", save->last_excp_to);
+}
+
+static void svm_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2)
+{
+ struct vmcb_control_area *control = &to_svm(vcpu)->vmcb->control;
+
+ *info1 = control->exit_info_1;
+ *info2 = control->exit_info_2;
+}
+
+static int handle_exit(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+ struct kvm_run *kvm_run = vcpu->run;
+ u32 exit_code = svm->vmcb->control.exit_code;
+
+ if (!is_cr_intercept(svm, INTERCEPT_CR0_WRITE))
+ vcpu->arch.cr0 = svm->vmcb->save.cr0;
+ if (npt_enabled)
+ vcpu->arch.cr3 = svm->vmcb->save.cr3;
+
+ if (unlikely(svm->nested.exit_required)) {
+ nested_svm_vmexit(svm);
+ svm->nested.exit_required = false;
+
+ return 1;
+ }
+
+ if (is_guest_mode(vcpu)) {
+ int vmexit;
+
+ trace_kvm_nested_vmexit(svm->vmcb->save.rip, exit_code,
+ svm->vmcb->control.exit_info_1,
+ svm->vmcb->control.exit_info_2,
+ svm->vmcb->control.exit_int_info,
+ svm->vmcb->control.exit_int_info_err,
+ KVM_ISA_SVM);
+
+ vmexit = nested_svm_exit_special(svm);
+
+ if (vmexit == NESTED_EXIT_CONTINUE)
+ vmexit = nested_svm_exit_handled(svm);
+
+ if (vmexit == NESTED_EXIT_DONE)
+ return 1;
+ }
+
+ svm_complete_interrupts(svm);
+
+ if (svm->vmcb->control.exit_code == SVM_EXIT_ERR) {
+ kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
+ kvm_run->fail_entry.hardware_entry_failure_reason
+ = svm->vmcb->control.exit_code;
+ pr_err("KVM: FAILED VMRUN WITH VMCB:\n");
+ dump_vmcb(vcpu);
+ return 0;
+ }
+
+ if (is_external_interrupt(svm->vmcb->control.exit_int_info) &&
+ exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR &&
+ exit_code != SVM_EXIT_NPF && exit_code != SVM_EXIT_TASK_SWITCH &&
+ exit_code != SVM_EXIT_INTR && exit_code != SVM_EXIT_NMI)
+ printk(KERN_ERR "%s: unexpected exit_int_info 0x%x "
+ "exit_code 0x%x\n",
+ __func__, svm->vmcb->control.exit_int_info,
+ exit_code);
+
+ if (exit_code >= ARRAY_SIZE(svm_exit_handlers)
+ || !svm_exit_handlers[exit_code]) {
+ WARN_ONCE(1, "svm: unexpected exit reason 0x%x\n", exit_code);
+ kvm_queue_exception(vcpu, UD_VECTOR);
+ return 1;
+ }
+
+ return svm_exit_handlers[exit_code](svm);
+}
+
+static void reload_tss(struct kvm_vcpu *vcpu)
+{
+ int cpu = raw_smp_processor_id();
+
+ struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
+ sd->tss_desc->type = 9; /* available 32/64-bit TSS */
+ load_TR_desc();
+}
+
+static void pre_svm_run(struct vcpu_svm *svm)
+{
+ int cpu = raw_smp_processor_id();
+
+ struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
+
+ /* FIXME: handle wraparound of asid_generation */
+ if (svm->asid_generation != sd->asid_generation)
+ new_asid(svm, sd);
+}
+
+static void svm_inject_nmi(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_NMI;
+ vcpu->arch.hflags |= HF_NMI_MASK;
+ set_intercept(svm, INTERCEPT_IRET);
+ ++vcpu->stat.nmi_injections;
+}
+
+static inline void svm_inject_irq(struct vcpu_svm *svm, int irq)
+{
+ struct vmcb_control_area *control;
+
+ control = &svm->vmcb->control;
+ control->int_vector = irq;
+ control->int_ctl &= ~V_INTR_PRIO_MASK;
+ control->int_ctl |= V_IRQ_MASK |
+ ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
+ mark_dirty(svm->vmcb, VMCB_INTR);
+}
+
+static void svm_set_irq(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ BUG_ON(!(gif_set(svm)));
+
+ trace_kvm_inj_virq(vcpu->arch.interrupt.nr);
+ ++vcpu->stat.irq_injections;
+
+ svm->vmcb->control.event_inj = vcpu->arch.interrupt.nr |
+ SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR;
+}
+
+static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK))
+ return;
+
+ clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);
+
+ if (irr == -1)
+ return;
+
+ if (tpr >= irr)
+ set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
+}
+
+static void svm_set_virtual_x2apic_mode(struct kvm_vcpu *vcpu, bool set)
+{
+ return;
+}
+
+static int svm_vm_has_apicv(struct kvm *kvm)
+{
+ return 0;
+}
+
+static void svm_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
+{
+ return;
+}
+
+static void svm_sync_pir_to_irr(struct kvm_vcpu *vcpu)
+{
+ return;
+}
+
+static int svm_nmi_allowed(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+ struct vmcb *vmcb = svm->vmcb;
+ int ret;
+ ret = !(vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) &&
+ !(svm->vcpu.arch.hflags & HF_NMI_MASK);
+ ret = ret && gif_set(svm) && nested_svm_nmi(svm);
+
+ return ret;
+}
+
+static bool svm_get_nmi_mask(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ return !!(svm->vcpu.arch.hflags & HF_NMI_MASK);
+}
+
+static void svm_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ if (masked) {
+ svm->vcpu.arch.hflags |= HF_NMI_MASK;
+ set_intercept(svm, INTERCEPT_IRET);
+ } else {
+ svm->vcpu.arch.hflags &= ~HF_NMI_MASK;
+ clr_intercept(svm, INTERCEPT_IRET);
+ }
+}
+
+static int svm_interrupt_allowed(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+ struct vmcb *vmcb = svm->vmcb;
+ int ret;
+
+ if (!gif_set(svm) ||
+ (vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK))
+ return 0;
+
+ ret = !!(kvm_get_rflags(vcpu) & X86_EFLAGS_IF);
+
+ if (is_guest_mode(vcpu))
+ return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK);
+
+ return ret;
+}
+
+static void enable_irq_window(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ /*
+ * In case GIF=0 we can't rely on the CPU to tell us when GIF becomes
+ * 1, because that's a separate STGI/VMRUN intercept. The next time we
+ * get that intercept, this function will be called again though and
+ * we'll get the vintr intercept.
+ */
+ if (gif_set(svm) && nested_svm_intr(svm)) {
+ svm_set_vintr(svm);
+ svm_inject_irq(svm, 0x0);
+ }
+}
+
+static void enable_nmi_window(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ if ((svm->vcpu.arch.hflags & (HF_NMI_MASK | HF_IRET_MASK))
+ == HF_NMI_MASK)
+ return; /* IRET will cause a vm exit */
+
+ /*
+ * Something prevents NMI from been injected. Single step over possible
+ * problem (IRET or exception injection or interrupt shadow)
+ */
+ svm->nmi_singlestep = true;
+ svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);
+ update_db_bp_intercept(vcpu);
+}
+
+static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr)
+{
+ return 0;
+}
+
+static void svm_flush_tlb(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ if (static_cpu_has(X86_FEATURE_FLUSHBYASID))
+ svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ASID;
+ else
+ svm->asid_generation--;
+}
+
+static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu)
+{
+}
+
+static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK))
+ return;
+
+ if (!is_cr_intercept(svm, INTERCEPT_CR8_WRITE)) {
+ int cr8 = svm->vmcb->control.int_ctl & V_TPR_MASK;
+ kvm_set_cr8(vcpu, cr8);
+ }
+}
+
+static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+ u64 cr8;
+
+ if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK))
+ return;
+
+ cr8 = kvm_get_cr8(vcpu);
+ svm->vmcb->control.int_ctl &= ~V_TPR_MASK;
+ svm->vmcb->control.int_ctl |= cr8 & V_TPR_MASK;
+}
+
+static void svm_complete_interrupts(struct vcpu_svm *svm)
+{
+ u8 vector;
+ int type;
+ u32 exitintinfo = svm->vmcb->control.exit_int_info;
+ unsigned int3_injected = svm->int3_injected;
+
+ svm->int3_injected = 0;
+
+ /*
+ * If we've made progress since setting HF_IRET_MASK, we've
+ * executed an IRET and can allow NMI injection.
+ */
+ if ((svm->vcpu.arch.hflags & HF_IRET_MASK)
+ && kvm_rip_read(&svm->vcpu) != svm->nmi_iret_rip) {
+ svm->vcpu.arch.hflags &= ~(HF_NMI_MASK | HF_IRET_MASK);
+ kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
+ }
+
+ svm->vcpu.arch.nmi_injected = false;
+ kvm_clear_exception_queue(&svm->vcpu);
+ kvm_clear_interrupt_queue(&svm->vcpu);
+
+ if (!(exitintinfo & SVM_EXITINTINFO_VALID))
+ return;
+
+ kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
+
+ vector = exitintinfo & SVM_EXITINTINFO_VEC_MASK;
+ type = exitintinfo & SVM_EXITINTINFO_TYPE_MASK;
+
+ switch (type) {
+ case SVM_EXITINTINFO_TYPE_NMI:
+ svm->vcpu.arch.nmi_injected = true;
+ break;
+ case SVM_EXITINTINFO_TYPE_EXEPT:
+ /*
+ * In case of software exceptions, do not reinject the vector,
+ * but re-execute the instruction instead. Rewind RIP first
+ * if we emulated INT3 before.
+ */
+ if (kvm_exception_is_soft(vector)) {
+ if (vector == BP_VECTOR && int3_injected &&
+ kvm_is_linear_rip(&svm->vcpu, svm->int3_rip))
+ kvm_rip_write(&svm->vcpu,
+ kvm_rip_read(&svm->vcpu) -
+ int3_injected);
+ break;
+ }
+ if (exitintinfo & SVM_EXITINTINFO_VALID_ERR) {
+ u32 err = svm->vmcb->control.exit_int_info_err;
+ kvm_requeue_exception_e(&svm->vcpu, vector, err);
+
+ } else
+ kvm_requeue_exception(&svm->vcpu, vector);
+ break;
+ case SVM_EXITINTINFO_TYPE_INTR:
+ kvm_queue_interrupt(&svm->vcpu, vector, false);
+ break;
+ default:
+ break;
+ }
+}
+
+static void svm_cancel_injection(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+ struct vmcb_control_area *control = &svm->vmcb->control;
+
+ control->exit_int_info = control->event_inj;
+ control->exit_int_info_err = control->event_inj_err;
+ control->event_inj = 0;
+ svm_complete_interrupts(svm);
+}
+
+static void svm_vcpu_run(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ svm->vmcb->save.rax = vcpu->arch.regs[VCPU_REGS_RAX];
+ svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP];
+ svm->vmcb->save.rip = vcpu->arch.regs[VCPU_REGS_RIP];
+
+ /*
+ * A vmexit emulation is required before the vcpu can be executed
+ * again.
+ */
+ if (unlikely(svm->nested.exit_required))
+ return;
+
+ pre_svm_run(svm);
+
+ sync_lapic_to_cr8(vcpu);
+
+ svm->vmcb->save.cr2 = vcpu->arch.cr2;
+
+ clgi();
+
+ local_irq_enable();
+
+ asm volatile (
+ "push %%" _ASM_BP "; \n\t"
+ "mov %c[rbx](%[svm]), %%" _ASM_BX " \n\t"
+ "mov %c[rcx](%[svm]), %%" _ASM_CX " \n\t"
+ "mov %c[rdx](%[svm]), %%" _ASM_DX " \n\t"
+ "mov %c[rsi](%[svm]), %%" _ASM_SI " \n\t"
+ "mov %c[rdi](%[svm]), %%" _ASM_DI " \n\t"
+ "mov %c[rbp](%[svm]), %%" _ASM_BP " \n\t"
+#ifdef CONFIG_X86_64
+ "mov %c[r8](%[svm]), %%r8 \n\t"
+ "mov %c[r9](%[svm]), %%r9 \n\t"
+ "mov %c[r10](%[svm]), %%r10 \n\t"
+ "mov %c[r11](%[svm]), %%r11 \n\t"
+ "mov %c[r12](%[svm]), %%r12 \n\t"
+ "mov %c[r13](%[svm]), %%r13 \n\t"
+ "mov %c[r14](%[svm]), %%r14 \n\t"
+ "mov %c[r15](%[svm]), %%r15 \n\t"
+#endif
+
+ /* Enter guest mode */
+ "push %%" _ASM_AX " \n\t"
+ "mov %c[vmcb](%[svm]), %%" _ASM_AX " \n\t"
+ __ex(SVM_VMLOAD) "\n\t"
+ __ex(SVM_VMRUN) "\n\t"
+ __ex(SVM_VMSAVE) "\n\t"
+ "pop %%" _ASM_AX " \n\t"
+
+ /* Save guest registers, load host registers */
+ "mov %%" _ASM_BX ", %c[rbx](%[svm]) \n\t"
+ "mov %%" _ASM_CX ", %c[rcx](%[svm]) \n\t"
+ "mov %%" _ASM_DX ", %c[rdx](%[svm]) \n\t"
+ "mov %%" _ASM_SI ", %c[rsi](%[svm]) \n\t"
+ "mov %%" _ASM_DI ", %c[rdi](%[svm]) \n\t"
+ "mov %%" _ASM_BP ", %c[rbp](%[svm]) \n\t"
+#ifdef CONFIG_X86_64
+ "mov %%r8, %c[r8](%[svm]) \n\t"
+ "mov %%r9, %c[r9](%[svm]) \n\t"
+ "mov %%r10, %c[r10](%[svm]) \n\t"
+ "mov %%r11, %c[r11](%[svm]) \n\t"
+ "mov %%r12, %c[r12](%[svm]) \n\t"
+ "mov %%r13, %c[r13](%[svm]) \n\t"
+ "mov %%r14, %c[r14](%[svm]) \n\t"
+ "mov %%r15, %c[r15](%[svm]) \n\t"
+#endif
+ "pop %%" _ASM_BP
+ :
+ : [svm]"a"(svm),
+ [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)),
+ [rbx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBX])),
+ [rcx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RCX])),
+ [rdx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDX])),
+ [rsi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RSI])),
+ [rdi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDI])),
+ [rbp]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBP]))
+#ifdef CONFIG_X86_64
+ , [r8]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R8])),
+ [r9]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R9])),
+ [r10]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R10])),
+ [r11]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R11])),
+ [r12]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R12])),
+ [r13]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R13])),
+ [r14]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R14])),
+ [r15]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R15]))
+#endif
+ : "cc", "memory"
+#ifdef CONFIG_X86_64
+ , "rbx", "rcx", "rdx", "rsi", "rdi"
+ , "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15"
+#else
+ , "ebx", "ecx", "edx", "esi", "edi"
+#endif
+ );
+
+#ifdef CONFIG_X86_64
+ wrmsrl(MSR_GS_BASE, svm->host.gs_base);
+#else
+ loadsegment(fs, svm->host.fs);
+#ifndef CONFIG_X86_32_LAZY_GS
+ loadsegment(gs, svm->host.gs);
+#endif
+#endif
+
+ reload_tss(vcpu);
+
+ local_irq_disable();
+
+ vcpu->arch.cr2 = svm->vmcb->save.cr2;
+ vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax;
+ vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp;
+ vcpu->arch.regs[VCPU_REGS_RIP] = svm->vmcb->save.rip;
+
+ trace_kvm_exit(svm->vmcb->control.exit_code, vcpu, KVM_ISA_SVM);
+
+ if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
+ kvm_before_handle_nmi(&svm->vcpu);
+
+ stgi();
+
+ /* Any pending NMI will happen here */
+
+ if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
+ kvm_after_handle_nmi(&svm->vcpu);
+
+ sync_cr8_to_lapic(vcpu);
+
+ svm->next_rip = 0;
+
+ svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
+
+ /* if exit due to PF check for async PF */
+ if (svm->vmcb->control.exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR)
+ svm->apf_reason = kvm_read_and_reset_pf_reason();
+
+ if (npt_enabled) {
+ vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR);
+ vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR);
+ }
+
+ /*
+ * We need to handle MC intercepts here before the vcpu has a chance to
+ * change the physical cpu
+ */
+ if (unlikely(svm->vmcb->control.exit_code ==
+ SVM_EXIT_EXCP_BASE + MC_VECTOR))
+ svm_handle_mce(svm);
+
+ mark_all_clean(svm->vmcb);
+}
+
+static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ svm->vmcb->save.cr3 = root;
+ mark_dirty(svm->vmcb, VMCB_CR);
+ svm_flush_tlb(vcpu);
+}
+
+static void set_tdp_cr3(struct kvm_vcpu *vcpu, unsigned long root)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ svm->vmcb->control.nested_cr3 = root;
+ mark_dirty(svm->vmcb, VMCB_NPT);
+
+ /* Also sync guest cr3 here in case we live migrate */
+ svm->vmcb->save.cr3 = kvm_read_cr3(vcpu);
+ mark_dirty(svm->vmcb, VMCB_CR);
+
+ svm_flush_tlb(vcpu);
+}
+
+static int is_disabled(void)
+{
+ u64 vm_cr;
+
+ rdmsrl(MSR_VM_CR, vm_cr);
+ if (vm_cr & (1 << SVM_VM_CR_SVM_DISABLE))
+ return 1;
+
+ return 0;
+}
+
+static void
+svm_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
+{
+ /*
+ * Patch in the VMMCALL instruction:
+ */
+ hypercall[0] = 0x0f;
+ hypercall[1] = 0x01;
+ hypercall[2] = 0xd9;
+}
+
+static void svm_check_processor_compat(void *rtn)
+{
+ *(int *)rtn = 0;
+}
+
+static bool svm_cpu_has_accelerated_tpr(void)
+{
+ return false;
+}
+
+static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
+{
+ return 0;
+}
+
+static void svm_cpuid_update(struct kvm_vcpu *vcpu)
+{
+}
+
+static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
+{
+ switch (func) {
+ case 0x80000001:
+ if (nested)
+ entry->ecx |= (1 << 2); /* Set SVM bit */
+ break;
+ case 0x8000000A:
+ entry->eax = 1; /* SVM revision 1 */
+ entry->ebx = 8; /* Lets support 8 ASIDs in case we add proper
+ ASID emulation to nested SVM */
+ entry->ecx = 0; /* Reserved */
+ entry->edx = 0; /* Per default do not support any
+ additional features */
+
+ /* Support next_rip if host supports it */
+ if (boot_cpu_has(X86_FEATURE_NRIPS))
+ entry->edx |= SVM_FEATURE_NRIP;
+
+ /* Support NPT for the guest if enabled */
+ if (npt_enabled)
+ entry->edx |= SVM_FEATURE_NPT;
+
+ break;
+ }
+}
+
+static int svm_get_lpage_level(void)
+{
+ return PT_PDPE_LEVEL;
+}
+
+static bool svm_rdtscp_supported(void)
+{
+ return false;
+}
+
+static bool svm_invpcid_supported(void)
+{
+ return false;
+}
+
+static bool svm_mpx_supported(void)
+{
+ return false;
+}
+
+static bool svm_xsaves_supported(void)
+{
+ return false;
+}
+
+static bool svm_has_wbinvd_exit(void)
+{
+ return true;
+}
+
+static void svm_fpu_deactivate(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ set_exception_intercept(svm, NM_VECTOR);
+ update_cr0_intercept(svm);
+}
+
+#define PRE_EX(exit) { .exit_code = (exit), \
+ .stage = X86_ICPT_PRE_EXCEPT, }
+#define POST_EX(exit) { .exit_code = (exit), \
+ .stage = X86_ICPT_POST_EXCEPT, }
+#define POST_MEM(exit) { .exit_code = (exit), \
+ .stage = X86_ICPT_POST_MEMACCESS, }
+
+static const struct __x86_intercept {
+ u32 exit_code;
+ enum x86_intercept_stage stage;
+} x86_intercept_map[] = {
+ [x86_intercept_cr_read] = POST_EX(SVM_EXIT_READ_CR0),
+ [x86_intercept_cr_write] = POST_EX(SVM_EXIT_WRITE_CR0),
+ [x86_intercept_clts] = POST_EX(SVM_EXIT_WRITE_CR0),
+ [x86_intercept_lmsw] = POST_EX(SVM_EXIT_WRITE_CR0),
+ [x86_intercept_smsw] = POST_EX(SVM_EXIT_READ_CR0),
+ [x86_intercept_dr_read] = POST_EX(SVM_EXIT_READ_DR0),
+ [x86_intercept_dr_write] = POST_EX(SVM_EXIT_WRITE_DR0),
+ [x86_intercept_sldt] = POST_EX(SVM_EXIT_LDTR_READ),
+ [x86_intercept_str] = POST_EX(SVM_EXIT_TR_READ),
+ [x86_intercept_lldt] = POST_EX(SVM_EXIT_LDTR_WRITE),
+ [x86_intercept_ltr] = POST_EX(SVM_EXIT_TR_WRITE),
+ [x86_intercept_sgdt] = POST_EX(SVM_EXIT_GDTR_READ),
+ [x86_intercept_sidt] = POST_EX(SVM_EXIT_IDTR_READ),
+ [x86_intercept_lgdt] = POST_EX(SVM_EXIT_GDTR_WRITE),
+ [x86_intercept_lidt] = POST_EX(SVM_EXIT_IDTR_WRITE),
+ [x86_intercept_vmrun] = POST_EX(SVM_EXIT_VMRUN),
+ [x86_intercept_vmmcall] = POST_EX(SVM_EXIT_VMMCALL),
+ [x86_intercept_vmload] = POST_EX(SVM_EXIT_VMLOAD),
+ [x86_intercept_vmsave] = POST_EX(SVM_EXIT_VMSAVE),
+ [x86_intercept_stgi] = POST_EX(SVM_EXIT_STGI),
+ [x86_intercept_clgi] = POST_EX(SVM_EXIT_CLGI),
+ [x86_intercept_skinit] = POST_EX(SVM_EXIT_SKINIT),
+ [x86_intercept_invlpga] = POST_EX(SVM_EXIT_INVLPGA),
+ [x86_intercept_rdtscp] = POST_EX(SVM_EXIT_RDTSCP),
+ [x86_intercept_monitor] = POST_MEM(SVM_EXIT_MONITOR),
+ [x86_intercept_mwait] = POST_EX(SVM_EXIT_MWAIT),
+ [x86_intercept_invlpg] = POST_EX(SVM_EXIT_INVLPG),
+ [x86_intercept_invd] = POST_EX(SVM_EXIT_INVD),
+ [x86_intercept_wbinvd] = POST_EX(SVM_EXIT_WBINVD),
+ [x86_intercept_wrmsr] = POST_EX(SVM_EXIT_MSR),
+ [x86_intercept_rdtsc] = POST_EX(SVM_EXIT_RDTSC),
+ [x86_intercept_rdmsr] = POST_EX(SVM_EXIT_MSR),
+ [x86_intercept_rdpmc] = POST_EX(SVM_EXIT_RDPMC),
+ [x86_intercept_cpuid] = PRE_EX(SVM_EXIT_CPUID),
+ [x86_intercept_rsm] = PRE_EX(SVM_EXIT_RSM),
+ [x86_intercept_pause] = PRE_EX(SVM_EXIT_PAUSE),
+ [x86_intercept_pushf] = PRE_EX(SVM_EXIT_PUSHF),
+ [x86_intercept_popf] = PRE_EX(SVM_EXIT_POPF),
+ [x86_intercept_intn] = PRE_EX(SVM_EXIT_SWINT),
+ [x86_intercept_iret] = PRE_EX(SVM_EXIT_IRET),
+ [x86_intercept_icebp] = PRE_EX(SVM_EXIT_ICEBP),
+ [x86_intercept_hlt] = POST_EX(SVM_EXIT_HLT),
+ [x86_intercept_in] = POST_EX(SVM_EXIT_IOIO),
+ [x86_intercept_ins] = POST_EX(SVM_EXIT_IOIO),
+ [x86_intercept_out] = POST_EX(SVM_EXIT_IOIO),
+ [x86_intercept_outs] = POST_EX(SVM_EXIT_IOIO),
+};
+
+#undef PRE_EX
+#undef POST_EX
+#undef POST_MEM
+
+static int svm_check_intercept(struct kvm_vcpu *vcpu,
+ struct x86_instruction_info *info,
+ enum x86_intercept_stage stage)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+ int vmexit, ret = X86EMUL_CONTINUE;
+ struct __x86_intercept icpt_info;
+ struct vmcb *vmcb = svm->vmcb;
+
+ if (info->intercept >= ARRAY_SIZE(x86_intercept_map))
+ goto out;
+
+ icpt_info = x86_intercept_map[info->intercept];
+
+ if (stage != icpt_info.stage)
+ goto out;
+
+ switch (icpt_info.exit_code) {
+ case SVM_EXIT_READ_CR0:
+ if (info->intercept == x86_intercept_cr_read)
+ icpt_info.exit_code += info->modrm_reg;
+ break;
+ case SVM_EXIT_WRITE_CR0: {
+ unsigned long cr0, val;
+ u64 intercept;
+
+ if (info->intercept == x86_intercept_cr_write)
+ icpt_info.exit_code += info->modrm_reg;
+
+ if (icpt_info.exit_code != SVM_EXIT_WRITE_CR0 ||
+ info->intercept == x86_intercept_clts)
+ break;
+
+ intercept = svm->nested.intercept;
+
+ if (!(intercept & (1ULL << INTERCEPT_SELECTIVE_CR0)))
+ break;
+
+ cr0 = vcpu->arch.cr0 & ~SVM_CR0_SELECTIVE_MASK;
+ val = info->src_val & ~SVM_CR0_SELECTIVE_MASK;
+
+ if (info->intercept == x86_intercept_lmsw) {
+ cr0 &= 0xfUL;
+ val &= 0xfUL;
+ /* lmsw can't clear PE - catch this here */
+ if (cr0 & X86_CR0_PE)
+ val |= X86_CR0_PE;
+ }
+
+ if (cr0 ^ val)
+ icpt_info.exit_code = SVM_EXIT_CR0_SEL_WRITE;
+
+ break;
+ }
+ case SVM_EXIT_READ_DR0:
+ case SVM_EXIT_WRITE_DR0:
+ icpt_info.exit_code += info->modrm_reg;
+ break;
+ case SVM_EXIT_MSR:
+ if (info->intercept == x86_intercept_wrmsr)
+ vmcb->control.exit_info_1 = 1;
+ else
+ vmcb->control.exit_info_1 = 0;
+ break;
+ case SVM_EXIT_PAUSE:
+ /*
+ * We get this for NOP only, but pause
+ * is rep not, check this here
+ */
+ if (info->rep_prefix != REPE_PREFIX)
+ goto out;
+ case SVM_EXIT_IOIO: {
+ u64 exit_info;
+ u32 bytes;
+
+ if (info->intercept == x86_intercept_in ||
+ info->intercept == x86_intercept_ins) {
+ exit_info = ((info->src_val & 0xffff) << 16) |
+ SVM_IOIO_TYPE_MASK;
+ bytes = info->dst_bytes;
+ } else {
+ exit_info = (info->dst_val & 0xffff) << 16;
+ bytes = info->src_bytes;
+ }
+
+ if (info->intercept == x86_intercept_outs ||
+ info->intercept == x86_intercept_ins)
+ exit_info |= SVM_IOIO_STR_MASK;
+
+ if (info->rep_prefix)
+ exit_info |= SVM_IOIO_REP_MASK;
+
+ bytes = min(bytes, 4u);
+
+ exit_info |= bytes << SVM_IOIO_SIZE_SHIFT;
+
+ exit_info |= (u32)info->ad_bytes << (SVM_IOIO_ASIZE_SHIFT - 1);
+
+ vmcb->control.exit_info_1 = exit_info;
+ vmcb->control.exit_info_2 = info->next_rip;
+
+ break;
+ }
+ default:
+ break;
+ }
+
+ /* TODO: Advertise NRIPS to guest hypervisor unconditionally */
+ if (static_cpu_has(X86_FEATURE_NRIPS))
+ vmcb->control.next_rip = info->next_rip;
+ vmcb->control.exit_code = icpt_info.exit_code;
+ vmexit = nested_svm_exit_handled(svm);
+
+ ret = (vmexit == NESTED_EXIT_DONE) ? X86EMUL_INTERCEPTED
+ : X86EMUL_CONTINUE;
+
+out:
+ return ret;
+}
+
+static void svm_handle_external_intr(struct kvm_vcpu *vcpu)
+{
+ local_irq_enable();
+}
+
+static void svm_sched_in(struct kvm_vcpu *vcpu, int cpu)
+{
+}
+
+static struct kvm_x86_ops svm_x86_ops = {
+ .cpu_has_kvm_support = has_svm,
+ .disabled_by_bios = is_disabled,
+ .hardware_setup = svm_hardware_setup,
+ .hardware_unsetup = svm_hardware_unsetup,
+ .check_processor_compatibility = svm_check_processor_compat,
+ .hardware_enable = svm_hardware_enable,
+ .hardware_disable = svm_hardware_disable,
+ .cpu_has_accelerated_tpr = svm_cpu_has_accelerated_tpr,
+
+ .vcpu_create = svm_create_vcpu,
+ .vcpu_free = svm_free_vcpu,
+ .vcpu_reset = svm_vcpu_reset,
+
+ .prepare_guest_switch = svm_prepare_guest_switch,
+ .vcpu_load = svm_vcpu_load,
+ .vcpu_put = svm_vcpu_put,
+
+ .update_db_bp_intercept = update_db_bp_intercept,
+ .get_msr = svm_get_msr,
+ .set_msr = svm_set_msr,
+ .get_segment_base = svm_get_segment_base,
+ .get_segment = svm_get_segment,
+ .set_segment = svm_set_segment,
+ .get_cpl = svm_get_cpl,
+ .get_cs_db_l_bits = kvm_get_cs_db_l_bits,
+ .decache_cr0_guest_bits = svm_decache_cr0_guest_bits,
+ .decache_cr3 = svm_decache_cr3,
+ .decache_cr4_guest_bits = svm_decache_cr4_guest_bits,
+ .set_cr0 = svm_set_cr0,
+ .set_cr3 = svm_set_cr3,
+ .set_cr4 = svm_set_cr4,
+ .set_efer = svm_set_efer,
+ .get_idt = svm_get_idt,
+ .set_idt = svm_set_idt,
+ .get_gdt = svm_get_gdt,
+ .set_gdt = svm_set_gdt,
+ .get_dr6 = svm_get_dr6,
+ .set_dr6 = svm_set_dr6,
+ .set_dr7 = svm_set_dr7,
+ .sync_dirty_debug_regs = svm_sync_dirty_debug_regs,
+ .cache_reg = svm_cache_reg,
+ .get_rflags = svm_get_rflags,
+ .set_rflags = svm_set_rflags,
+ .fpu_activate = svm_fpu_activate,
+ .fpu_deactivate = svm_fpu_deactivate,
+
+ .tlb_flush = svm_flush_tlb,
+
+ .run = svm_vcpu_run,
+ .handle_exit = handle_exit,
+ .skip_emulated_instruction = skip_emulated_instruction,
+ .set_interrupt_shadow = svm_set_interrupt_shadow,
+ .get_interrupt_shadow = svm_get_interrupt_shadow,
+ .patch_hypercall = svm_patch_hypercall,
+ .set_irq = svm_set_irq,
+ .set_nmi = svm_inject_nmi,
+ .queue_exception = svm_queue_exception,
+ .cancel_injection = svm_cancel_injection,
+ .interrupt_allowed = svm_interrupt_allowed,
+ .nmi_allowed = svm_nmi_allowed,
+ .get_nmi_mask = svm_get_nmi_mask,
+ .set_nmi_mask = svm_set_nmi_mask,
+ .enable_nmi_window = enable_nmi_window,
+ .enable_irq_window = enable_irq_window,
+ .update_cr8_intercept = update_cr8_intercept,
+ .set_virtual_x2apic_mode = svm_set_virtual_x2apic_mode,
+ .vm_has_apicv = svm_vm_has_apicv,
+ .load_eoi_exitmap = svm_load_eoi_exitmap,
+ .sync_pir_to_irr = svm_sync_pir_to_irr,
+
+ .set_tss_addr = svm_set_tss_addr,
+ .get_tdp_level = get_npt_level,
+ .get_mt_mask = svm_get_mt_mask,
+
+ .get_exit_info = svm_get_exit_info,
+
+ .get_lpage_level = svm_get_lpage_level,
+
+ .cpuid_update = svm_cpuid_update,
+
+ .rdtscp_supported = svm_rdtscp_supported,
+ .invpcid_supported = svm_invpcid_supported,
+ .mpx_supported = svm_mpx_supported,
+ .xsaves_supported = svm_xsaves_supported,
+
+ .set_supported_cpuid = svm_set_supported_cpuid,
+
+ .has_wbinvd_exit = svm_has_wbinvd_exit,
+
+ .set_tsc_khz = svm_set_tsc_khz,
+ .read_tsc_offset = svm_read_tsc_offset,
+ .write_tsc_offset = svm_write_tsc_offset,
+ .adjust_tsc_offset = svm_adjust_tsc_offset,
+ .compute_tsc_offset = svm_compute_tsc_offset,
+ .read_l1_tsc = svm_read_l1_tsc,
+
+ .set_tdp_cr3 = set_tdp_cr3,
+
+ .check_intercept = svm_check_intercept,
+ .handle_external_intr = svm_handle_external_intr,
+
+ .sched_in = svm_sched_in,
+};
+
+static int __init svm_init(void)
+{
+ return kvm_init(&svm_x86_ops, sizeof(struct vcpu_svm),
+ __alignof__(struct vcpu_svm), THIS_MODULE);
+}
+
+static void __exit svm_exit(void)
+{
+ kvm_exit();
+}
+
+module_init(svm_init)
+module_exit(svm_exit)