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-rw-r--r--arch/powerpc/kvm/book3s_hv.c2766
1 files changed, 2766 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
new file mode 100644
index 000000000..df81caab7
--- /dev/null
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -0,0 +1,2766 @@
+/*
+ * Copyright 2011 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
+ * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved.
+ *
+ * Authors:
+ * Paul Mackerras <paulus@au1.ibm.com>
+ * Alexander Graf <agraf@suse.de>
+ * Kevin Wolf <mail@kevin-wolf.de>
+ *
+ * Description: KVM functions specific to running on Book 3S
+ * processors in hypervisor mode (specifically POWER7 and later).
+ *
+ * This file is derived from arch/powerpc/kvm/book3s.c,
+ * by Alexander Graf <agraf@suse.de>.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kvm_host.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/preempt.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/export.h>
+#include <linux/fs.h>
+#include <linux/anon_inodes.h>
+#include <linux/cpumask.h>
+#include <linux/spinlock.h>
+#include <linux/page-flags.h>
+#include <linux/srcu.h>
+#include <linux/miscdevice.h>
+#include <linux/debugfs.h>
+
+#include <asm/reg.h>
+#include <asm/cputable.h>
+#include <asm/cache.h>
+#include <asm/cacheflush.h>
+#include <asm/tlbflush.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/kvm_ppc.h>
+#include <asm/kvm_book3s.h>
+#include <asm/mmu_context.h>
+#include <asm/lppaca.h>
+#include <asm/processor.h>
+#include <asm/cputhreads.h>
+#include <asm/page.h>
+#include <asm/hvcall.h>
+#include <asm/switch_to.h>
+#include <asm/smp.h>
+#include <asm/dbell.h>
+#include <linux/gfp.h>
+#include <linux/vmalloc.h>
+#include <linux/highmem.h>
+#include <linux/hugetlb.h>
+#include <linux/module.h>
+
+#include "book3s.h"
+
+#define CREATE_TRACE_POINTS
+#include "trace_hv.h"
+
+/* #define EXIT_DEBUG */
+/* #define EXIT_DEBUG_SIMPLE */
+/* #define EXIT_DEBUG_INT */
+
+/* Used to indicate that a guest page fault needs to be handled */
+#define RESUME_PAGE_FAULT (RESUME_GUEST | RESUME_FLAG_ARCH1)
+
+/* Used as a "null" value for timebase values */
+#define TB_NIL (~(u64)0)
+
+static DECLARE_BITMAP(default_enabled_hcalls, MAX_HCALL_OPCODE/4 + 1);
+
+#if defined(CONFIG_PPC_64K_PAGES)
+#define MPP_BUFFER_ORDER 0
+#elif defined(CONFIG_PPC_4K_PAGES)
+#define MPP_BUFFER_ORDER 3
+#endif
+
+
+static void kvmppc_end_cede(struct kvm_vcpu *vcpu);
+static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu);
+
+static bool kvmppc_ipi_thread(int cpu)
+{
+ /* On POWER8 for IPIs to threads in the same core, use msgsnd */
+ if (cpu_has_feature(CPU_FTR_ARCH_207S)) {
+ preempt_disable();
+ if (cpu_first_thread_sibling(cpu) ==
+ cpu_first_thread_sibling(smp_processor_id())) {
+ unsigned long msg = PPC_DBELL_TYPE(PPC_DBELL_SERVER);
+ msg |= cpu_thread_in_core(cpu);
+ smp_mb();
+ __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
+ preempt_enable();
+ return true;
+ }
+ preempt_enable();
+ }
+
+#if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP)
+ if (cpu >= 0 && cpu < nr_cpu_ids && paca[cpu].kvm_hstate.xics_phys) {
+ xics_wake_cpu(cpu);
+ return true;
+ }
+#endif
+
+ return false;
+}
+
+static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu *vcpu)
+{
+ int cpu = vcpu->cpu;
+ wait_queue_head_t *wqp;
+
+ wqp = kvm_arch_vcpu_wq(vcpu);
+ if (waitqueue_active(wqp)) {
+ wake_up_interruptible(wqp);
+ ++vcpu->stat.halt_wakeup;
+ }
+
+ if (kvmppc_ipi_thread(cpu + vcpu->arch.ptid))
+ return;
+
+ /* CPU points to the first thread of the core */
+ if (cpu >= 0 && cpu < nr_cpu_ids && cpu_online(cpu))
+ smp_send_reschedule(cpu);
+}
+
+/*
+ * We use the vcpu_load/put functions to measure stolen time.
+ * Stolen time is counted as time when either the vcpu is able to
+ * run as part of a virtual core, but the task running the vcore
+ * is preempted or sleeping, or when the vcpu needs something done
+ * in the kernel by the task running the vcpu, but that task is
+ * preempted or sleeping. Those two things have to be counted
+ * separately, since one of the vcpu tasks will take on the job
+ * of running the core, and the other vcpu tasks in the vcore will
+ * sleep waiting for it to do that, but that sleep shouldn't count
+ * as stolen time.
+ *
+ * Hence we accumulate stolen time when the vcpu can run as part of
+ * a vcore using vc->stolen_tb, and the stolen time when the vcpu
+ * needs its task to do other things in the kernel (for example,
+ * service a page fault) in busy_stolen. We don't accumulate
+ * stolen time for a vcore when it is inactive, or for a vcpu
+ * when it is in state RUNNING or NOTREADY. NOTREADY is a bit of
+ * a misnomer; it means that the vcpu task is not executing in
+ * the KVM_VCPU_RUN ioctl, i.e. it is in userspace or elsewhere in
+ * the kernel. We don't have any way of dividing up that time
+ * between time that the vcpu is genuinely stopped, time that
+ * the task is actively working on behalf of the vcpu, and time
+ * that the task is preempted, so we don't count any of it as
+ * stolen.
+ *
+ * Updates to busy_stolen are protected by arch.tbacct_lock;
+ * updates to vc->stolen_tb are protected by the vcore->stoltb_lock
+ * lock. The stolen times are measured in units of timebase ticks.
+ * (Note that the != TB_NIL checks below are purely defensive;
+ * they should never fail.)
+ */
+
+static void kvmppc_core_vcpu_load_hv(struct kvm_vcpu *vcpu, int cpu)
+{
+ struct kvmppc_vcore *vc = vcpu->arch.vcore;
+ unsigned long flags;
+
+ /*
+ * We can test vc->runner without taking the vcore lock,
+ * because only this task ever sets vc->runner to this
+ * vcpu, and once it is set to this vcpu, only this task
+ * ever sets it to NULL.
+ */
+ if (vc->runner == vcpu && vc->vcore_state != VCORE_INACTIVE) {
+ spin_lock_irqsave(&vc->stoltb_lock, flags);
+ if (vc->preempt_tb != TB_NIL) {
+ vc->stolen_tb += mftb() - vc->preempt_tb;
+ vc->preempt_tb = TB_NIL;
+ }
+ spin_unlock_irqrestore(&vc->stoltb_lock, flags);
+ }
+ spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags);
+ if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST &&
+ vcpu->arch.busy_preempt != TB_NIL) {
+ vcpu->arch.busy_stolen += mftb() - vcpu->arch.busy_preempt;
+ vcpu->arch.busy_preempt = TB_NIL;
+ }
+ spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags);
+}
+
+static void kvmppc_core_vcpu_put_hv(struct kvm_vcpu *vcpu)
+{
+ struct kvmppc_vcore *vc = vcpu->arch.vcore;
+ unsigned long flags;
+
+ if (vc->runner == vcpu && vc->vcore_state != VCORE_INACTIVE) {
+ spin_lock_irqsave(&vc->stoltb_lock, flags);
+ vc->preempt_tb = mftb();
+ spin_unlock_irqrestore(&vc->stoltb_lock, flags);
+ }
+ spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags);
+ if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST)
+ vcpu->arch.busy_preempt = mftb();
+ spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags);
+}
+
+static void kvmppc_set_msr_hv(struct kvm_vcpu *vcpu, u64 msr)
+{
+ vcpu->arch.shregs.msr = msr;
+ kvmppc_end_cede(vcpu);
+}
+
+void kvmppc_set_pvr_hv(struct kvm_vcpu *vcpu, u32 pvr)
+{
+ vcpu->arch.pvr = pvr;
+}
+
+int kvmppc_set_arch_compat(struct kvm_vcpu *vcpu, u32 arch_compat)
+{
+ unsigned long pcr = 0;
+ struct kvmppc_vcore *vc = vcpu->arch.vcore;
+
+ if (arch_compat) {
+ switch (arch_compat) {
+ case PVR_ARCH_205:
+ /*
+ * If an arch bit is set in PCR, all the defined
+ * higher-order arch bits also have to be set.
+ */
+ pcr = PCR_ARCH_206 | PCR_ARCH_205;
+ break;
+ case PVR_ARCH_206:
+ case PVR_ARCH_206p:
+ pcr = PCR_ARCH_206;
+ break;
+ case PVR_ARCH_207:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (!cpu_has_feature(CPU_FTR_ARCH_207S)) {
+ /* POWER7 can't emulate POWER8 */
+ if (!(pcr & PCR_ARCH_206))
+ return -EINVAL;
+ pcr &= ~PCR_ARCH_206;
+ }
+ }
+
+ spin_lock(&vc->lock);
+ vc->arch_compat = arch_compat;
+ vc->pcr = pcr;
+ spin_unlock(&vc->lock);
+
+ return 0;
+}
+
+void kvmppc_dump_regs(struct kvm_vcpu *vcpu)
+{
+ int r;
+
+ pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id);
+ pr_err("pc = %.16lx msr = %.16llx trap = %x\n",
+ vcpu->arch.pc, vcpu->arch.shregs.msr, vcpu->arch.trap);
+ for (r = 0; r < 16; ++r)
+ pr_err("r%2d = %.16lx r%d = %.16lx\n",
+ r, kvmppc_get_gpr(vcpu, r),
+ r+16, kvmppc_get_gpr(vcpu, r+16));
+ pr_err("ctr = %.16lx lr = %.16lx\n",
+ vcpu->arch.ctr, vcpu->arch.lr);
+ pr_err("srr0 = %.16llx srr1 = %.16llx\n",
+ vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1);
+ pr_err("sprg0 = %.16llx sprg1 = %.16llx\n",
+ vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1);
+ pr_err("sprg2 = %.16llx sprg3 = %.16llx\n",
+ vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3);
+ pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n",
+ vcpu->arch.cr, vcpu->arch.xer, vcpu->arch.shregs.dsisr);
+ pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar);
+ pr_err("fault dar = %.16lx dsisr = %.8x\n",
+ vcpu->arch.fault_dar, vcpu->arch.fault_dsisr);
+ pr_err("SLB (%d entries):\n", vcpu->arch.slb_max);
+ for (r = 0; r < vcpu->arch.slb_max; ++r)
+ pr_err(" ESID = %.16llx VSID = %.16llx\n",
+ vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv);
+ pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n",
+ vcpu->arch.vcore->lpcr, vcpu->kvm->arch.sdr1,
+ vcpu->arch.last_inst);
+}
+
+struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id)
+{
+ int r;
+ struct kvm_vcpu *v, *ret = NULL;
+
+ mutex_lock(&kvm->lock);
+ kvm_for_each_vcpu(r, v, kvm) {
+ if (v->vcpu_id == id) {
+ ret = v;
+ break;
+ }
+ }
+ mutex_unlock(&kvm->lock);
+ return ret;
+}
+
+static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa)
+{
+ vpa->__old_status |= LPPACA_OLD_SHARED_PROC;
+ vpa->yield_count = cpu_to_be32(1);
+}
+
+static int set_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *v,
+ unsigned long addr, unsigned long len)
+{
+ /* check address is cacheline aligned */
+ if (addr & (L1_CACHE_BYTES - 1))
+ return -EINVAL;
+ spin_lock(&vcpu->arch.vpa_update_lock);
+ if (v->next_gpa != addr || v->len != len) {
+ v->next_gpa = addr;
+ v->len = addr ? len : 0;
+ v->update_pending = 1;
+ }
+ spin_unlock(&vcpu->arch.vpa_update_lock);
+ return 0;
+}
+
+/* Length for a per-processor buffer is passed in at offset 4 in the buffer */
+struct reg_vpa {
+ u32 dummy;
+ union {
+ __be16 hword;
+ __be32 word;
+ } length;
+};
+
+static int vpa_is_registered(struct kvmppc_vpa *vpap)
+{
+ if (vpap->update_pending)
+ return vpap->next_gpa != 0;
+ return vpap->pinned_addr != NULL;
+}
+
+static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu,
+ unsigned long flags,
+ unsigned long vcpuid, unsigned long vpa)
+{
+ struct kvm *kvm = vcpu->kvm;
+ unsigned long len, nb;
+ void *va;
+ struct kvm_vcpu *tvcpu;
+ int err;
+ int subfunc;
+ struct kvmppc_vpa *vpap;
+
+ tvcpu = kvmppc_find_vcpu(kvm, vcpuid);
+ if (!tvcpu)
+ return H_PARAMETER;
+
+ subfunc = (flags >> H_VPA_FUNC_SHIFT) & H_VPA_FUNC_MASK;
+ if (subfunc == H_VPA_REG_VPA || subfunc == H_VPA_REG_DTL ||
+ subfunc == H_VPA_REG_SLB) {
+ /* Registering new area - address must be cache-line aligned */
+ if ((vpa & (L1_CACHE_BYTES - 1)) || !vpa)
+ return H_PARAMETER;
+
+ /* convert logical addr to kernel addr and read length */
+ va = kvmppc_pin_guest_page(kvm, vpa, &nb);
+ if (va == NULL)
+ return H_PARAMETER;
+ if (subfunc == H_VPA_REG_VPA)
+ len = be16_to_cpu(((struct reg_vpa *)va)->length.hword);
+ else
+ len = be32_to_cpu(((struct reg_vpa *)va)->length.word);
+ kvmppc_unpin_guest_page(kvm, va, vpa, false);
+
+ /* Check length */
+ if (len > nb || len < sizeof(struct reg_vpa))
+ return H_PARAMETER;
+ } else {
+ vpa = 0;
+ len = 0;
+ }
+
+ err = H_PARAMETER;
+ vpap = NULL;
+ spin_lock(&tvcpu->arch.vpa_update_lock);
+
+ switch (subfunc) {
+ case H_VPA_REG_VPA: /* register VPA */
+ if (len < sizeof(struct lppaca))
+ break;
+ vpap = &tvcpu->arch.vpa;
+ err = 0;
+ break;
+
+ case H_VPA_REG_DTL: /* register DTL */
+ if (len < sizeof(struct dtl_entry))
+ break;
+ len -= len % sizeof(struct dtl_entry);
+
+ /* Check that they have previously registered a VPA */
+ err = H_RESOURCE;
+ if (!vpa_is_registered(&tvcpu->arch.vpa))
+ break;
+
+ vpap = &tvcpu->arch.dtl;
+ err = 0;
+ break;
+
+ case H_VPA_REG_SLB: /* register SLB shadow buffer */
+ /* Check that they have previously registered a VPA */
+ err = H_RESOURCE;
+ if (!vpa_is_registered(&tvcpu->arch.vpa))
+ break;
+
+ vpap = &tvcpu->arch.slb_shadow;
+ err = 0;
+ break;
+
+ case H_VPA_DEREG_VPA: /* deregister VPA */
+ /* Check they don't still have a DTL or SLB buf registered */
+ err = H_RESOURCE;
+ if (vpa_is_registered(&tvcpu->arch.dtl) ||
+ vpa_is_registered(&tvcpu->arch.slb_shadow))
+ break;
+
+ vpap = &tvcpu->arch.vpa;
+ err = 0;
+ break;
+
+ case H_VPA_DEREG_DTL: /* deregister DTL */
+ vpap = &tvcpu->arch.dtl;
+ err = 0;
+ break;
+
+ case H_VPA_DEREG_SLB: /* deregister SLB shadow buffer */
+ vpap = &tvcpu->arch.slb_shadow;
+ err = 0;
+ break;
+ }
+
+ if (vpap) {
+ vpap->next_gpa = vpa;
+ vpap->len = len;
+ vpap->update_pending = 1;
+ }
+
+ spin_unlock(&tvcpu->arch.vpa_update_lock);
+
+ return err;
+}
+
+static void kvmppc_update_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *vpap)
+{
+ struct kvm *kvm = vcpu->kvm;
+ void *va;
+ unsigned long nb;
+ unsigned long gpa;
+
+ /*
+ * We need to pin the page pointed to by vpap->next_gpa,
+ * but we can't call kvmppc_pin_guest_page under the lock
+ * as it does get_user_pages() and down_read(). So we
+ * have to drop the lock, pin the page, then get the lock
+ * again and check that a new area didn't get registered
+ * in the meantime.
+ */
+ for (;;) {
+ gpa = vpap->next_gpa;
+ spin_unlock(&vcpu->arch.vpa_update_lock);
+ va = NULL;
+ nb = 0;
+ if (gpa)
+ va = kvmppc_pin_guest_page(kvm, gpa, &nb);
+ spin_lock(&vcpu->arch.vpa_update_lock);
+ if (gpa == vpap->next_gpa)
+ break;
+ /* sigh... unpin that one and try again */
+ if (va)
+ kvmppc_unpin_guest_page(kvm, va, gpa, false);
+ }
+
+ vpap->update_pending = 0;
+ if (va && nb < vpap->len) {
+ /*
+ * If it's now too short, it must be that userspace
+ * has changed the mappings underlying guest memory,
+ * so unregister the region.
+ */
+ kvmppc_unpin_guest_page(kvm, va, gpa, false);
+ va = NULL;
+ }
+ if (vpap->pinned_addr)
+ kvmppc_unpin_guest_page(kvm, vpap->pinned_addr, vpap->gpa,
+ vpap->dirty);
+ vpap->gpa = gpa;
+ vpap->pinned_addr = va;
+ vpap->dirty = false;
+ if (va)
+ vpap->pinned_end = va + vpap->len;
+}
+
+static void kvmppc_update_vpas(struct kvm_vcpu *vcpu)
+{
+ if (!(vcpu->arch.vpa.update_pending ||
+ vcpu->arch.slb_shadow.update_pending ||
+ vcpu->arch.dtl.update_pending))
+ return;
+
+ spin_lock(&vcpu->arch.vpa_update_lock);
+ if (vcpu->arch.vpa.update_pending) {
+ kvmppc_update_vpa(vcpu, &vcpu->arch.vpa);
+ if (vcpu->arch.vpa.pinned_addr)
+ init_vpa(vcpu, vcpu->arch.vpa.pinned_addr);
+ }
+ if (vcpu->arch.dtl.update_pending) {
+ kvmppc_update_vpa(vcpu, &vcpu->arch.dtl);
+ vcpu->arch.dtl_ptr = vcpu->arch.dtl.pinned_addr;
+ vcpu->arch.dtl_index = 0;
+ }
+ if (vcpu->arch.slb_shadow.update_pending)
+ kvmppc_update_vpa(vcpu, &vcpu->arch.slb_shadow);
+ spin_unlock(&vcpu->arch.vpa_update_lock);
+}
+
+/*
+ * Return the accumulated stolen time for the vcore up until `now'.
+ * The caller should hold the vcore lock.
+ */
+static u64 vcore_stolen_time(struct kvmppc_vcore *vc, u64 now)
+{
+ u64 p;
+ unsigned long flags;
+
+ spin_lock_irqsave(&vc->stoltb_lock, flags);
+ p = vc->stolen_tb;
+ if (vc->vcore_state != VCORE_INACTIVE &&
+ vc->preempt_tb != TB_NIL)
+ p += now - vc->preempt_tb;
+ spin_unlock_irqrestore(&vc->stoltb_lock, flags);
+ return p;
+}
+
+static void kvmppc_create_dtl_entry(struct kvm_vcpu *vcpu,
+ struct kvmppc_vcore *vc)
+{
+ struct dtl_entry *dt;
+ struct lppaca *vpa;
+ unsigned long stolen;
+ unsigned long core_stolen;
+ u64 now;
+
+ dt = vcpu->arch.dtl_ptr;
+ vpa = vcpu->arch.vpa.pinned_addr;
+ now = mftb();
+ core_stolen = vcore_stolen_time(vc, now);
+ stolen = core_stolen - vcpu->arch.stolen_logged;
+ vcpu->arch.stolen_logged = core_stolen;
+ spin_lock_irq(&vcpu->arch.tbacct_lock);
+ stolen += vcpu->arch.busy_stolen;
+ vcpu->arch.busy_stolen = 0;
+ spin_unlock_irq(&vcpu->arch.tbacct_lock);
+ if (!dt || !vpa)
+ return;
+ memset(dt, 0, sizeof(struct dtl_entry));
+ dt->dispatch_reason = 7;
+ dt->processor_id = cpu_to_be16(vc->pcpu + vcpu->arch.ptid);
+ dt->timebase = cpu_to_be64(now + vc->tb_offset);
+ dt->enqueue_to_dispatch_time = cpu_to_be32(stolen);
+ dt->srr0 = cpu_to_be64(kvmppc_get_pc(vcpu));
+ dt->srr1 = cpu_to_be64(vcpu->arch.shregs.msr);
+ ++dt;
+ if (dt == vcpu->arch.dtl.pinned_end)
+ dt = vcpu->arch.dtl.pinned_addr;
+ vcpu->arch.dtl_ptr = dt;
+ /* order writing *dt vs. writing vpa->dtl_idx */
+ smp_wmb();
+ vpa->dtl_idx = cpu_to_be64(++vcpu->arch.dtl_index);
+ vcpu->arch.dtl.dirty = true;
+}
+
+static bool kvmppc_power8_compatible(struct kvm_vcpu *vcpu)
+{
+ if (vcpu->arch.vcore->arch_compat >= PVR_ARCH_207)
+ return true;
+ if ((!vcpu->arch.vcore->arch_compat) &&
+ cpu_has_feature(CPU_FTR_ARCH_207S))
+ return true;
+ return false;
+}
+
+static int kvmppc_h_set_mode(struct kvm_vcpu *vcpu, unsigned long mflags,
+ unsigned long resource, unsigned long value1,
+ unsigned long value2)
+{
+ switch (resource) {
+ case H_SET_MODE_RESOURCE_SET_CIABR:
+ if (!kvmppc_power8_compatible(vcpu))
+ return H_P2;
+ if (value2)
+ return H_P4;
+ if (mflags)
+ return H_UNSUPPORTED_FLAG_START;
+ /* Guests can't breakpoint the hypervisor */
+ if ((value1 & CIABR_PRIV) == CIABR_PRIV_HYPER)
+ return H_P3;
+ vcpu->arch.ciabr = value1;
+ return H_SUCCESS;
+ case H_SET_MODE_RESOURCE_SET_DAWR:
+ if (!kvmppc_power8_compatible(vcpu))
+ return H_P2;
+ if (mflags)
+ return H_UNSUPPORTED_FLAG_START;
+ if (value2 & DABRX_HYP)
+ return H_P4;
+ vcpu->arch.dawr = value1;
+ vcpu->arch.dawrx = value2;
+ return H_SUCCESS;
+ default:
+ return H_TOO_HARD;
+ }
+}
+
+static int kvm_arch_vcpu_yield_to(struct kvm_vcpu *target)
+{
+ struct kvmppc_vcore *vcore = target->arch.vcore;
+
+ /*
+ * We expect to have been called by the real mode handler
+ * (kvmppc_rm_h_confer()) which would have directly returned
+ * H_SUCCESS if the source vcore wasn't idle (e.g. if it may
+ * have useful work to do and should not confer) so we don't
+ * recheck that here.
+ */
+
+ spin_lock(&vcore->lock);
+ if (target->arch.state == KVMPPC_VCPU_RUNNABLE &&
+ vcore->vcore_state != VCORE_INACTIVE)
+ target = vcore->runner;
+ spin_unlock(&vcore->lock);
+
+ return kvm_vcpu_yield_to(target);
+}
+
+static int kvmppc_get_yield_count(struct kvm_vcpu *vcpu)
+{
+ int yield_count = 0;
+ struct lppaca *lppaca;
+
+ spin_lock(&vcpu->arch.vpa_update_lock);
+ lppaca = (struct lppaca *)vcpu->arch.vpa.pinned_addr;
+ if (lppaca)
+ yield_count = be32_to_cpu(lppaca->yield_count);
+ spin_unlock(&vcpu->arch.vpa_update_lock);
+ return yield_count;
+}
+
+int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
+{
+ unsigned long req = kvmppc_get_gpr(vcpu, 3);
+ unsigned long target, ret = H_SUCCESS;
+ int yield_count;
+ struct kvm_vcpu *tvcpu;
+ int idx, rc;
+
+ if (req <= MAX_HCALL_OPCODE &&
+ !test_bit(req/4, vcpu->kvm->arch.enabled_hcalls))
+ return RESUME_HOST;
+
+ switch (req) {
+ case H_CEDE:
+ break;
+ case H_PROD:
+ target = kvmppc_get_gpr(vcpu, 4);
+ tvcpu = kvmppc_find_vcpu(vcpu->kvm, target);
+ if (!tvcpu) {
+ ret = H_PARAMETER;
+ break;
+ }
+ tvcpu->arch.prodded = 1;
+ smp_mb();
+ if (vcpu->arch.ceded) {
+ if (waitqueue_active(&vcpu->wq)) {
+ wake_up_interruptible(&vcpu->wq);
+ vcpu->stat.halt_wakeup++;
+ }
+ }
+ break;
+ case H_CONFER:
+ target = kvmppc_get_gpr(vcpu, 4);
+ if (target == -1)
+ break;
+ tvcpu = kvmppc_find_vcpu(vcpu->kvm, target);
+ if (!tvcpu) {
+ ret = H_PARAMETER;
+ break;
+ }
+ yield_count = kvmppc_get_gpr(vcpu, 5);
+ if (kvmppc_get_yield_count(tvcpu) != yield_count)
+ break;
+ kvm_arch_vcpu_yield_to(tvcpu);
+ break;
+ case H_REGISTER_VPA:
+ ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4),
+ kvmppc_get_gpr(vcpu, 5),
+ kvmppc_get_gpr(vcpu, 6));
+ break;
+ case H_RTAS:
+ if (list_empty(&vcpu->kvm->arch.rtas_tokens))
+ return RESUME_HOST;
+
+ idx = srcu_read_lock(&vcpu->kvm->srcu);
+ rc = kvmppc_rtas_hcall(vcpu);
+ srcu_read_unlock(&vcpu->kvm->srcu, idx);
+
+ if (rc == -ENOENT)
+ return RESUME_HOST;
+ else if (rc == 0)
+ break;
+
+ /* Send the error out to userspace via KVM_RUN */
+ return rc;
+ case H_LOGICAL_CI_LOAD:
+ ret = kvmppc_h_logical_ci_load(vcpu);
+ if (ret == H_TOO_HARD)
+ return RESUME_HOST;
+ break;
+ case H_LOGICAL_CI_STORE:
+ ret = kvmppc_h_logical_ci_store(vcpu);
+ if (ret == H_TOO_HARD)
+ return RESUME_HOST;
+ break;
+ case H_SET_MODE:
+ ret = kvmppc_h_set_mode(vcpu, kvmppc_get_gpr(vcpu, 4),
+ kvmppc_get_gpr(vcpu, 5),
+ kvmppc_get_gpr(vcpu, 6),
+ kvmppc_get_gpr(vcpu, 7));
+ if (ret == H_TOO_HARD)
+ return RESUME_HOST;
+ break;
+ case H_XIRR:
+ case H_CPPR:
+ case H_EOI:
+ case H_IPI:
+ case H_IPOLL:
+ case H_XIRR_X:
+ if (kvmppc_xics_enabled(vcpu)) {
+ ret = kvmppc_xics_hcall(vcpu, req);
+ break;
+ } /* fallthrough */
+ default:
+ return RESUME_HOST;
+ }
+ kvmppc_set_gpr(vcpu, 3, ret);
+ vcpu->arch.hcall_needed = 0;
+ return RESUME_GUEST;
+}
+
+static int kvmppc_hcall_impl_hv(unsigned long cmd)
+{
+ switch (cmd) {
+ case H_CEDE:
+ case H_PROD:
+ case H_CONFER:
+ case H_REGISTER_VPA:
+ case H_SET_MODE:
+ case H_LOGICAL_CI_LOAD:
+ case H_LOGICAL_CI_STORE:
+#ifdef CONFIG_KVM_XICS
+ case H_XIRR:
+ case H_CPPR:
+ case H_EOI:
+ case H_IPI:
+ case H_IPOLL:
+ case H_XIRR_X:
+#endif
+ return 1;
+ }
+
+ /* See if it's in the real-mode table */
+ return kvmppc_hcall_impl_hv_realmode(cmd);
+}
+
+static int kvmppc_emulate_debug_inst(struct kvm_run *run,
+ struct kvm_vcpu *vcpu)
+{
+ u32 last_inst;
+
+ if (kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst) !=
+ EMULATE_DONE) {
+ /*
+ * Fetch failed, so return to guest and
+ * try executing it again.
+ */
+ return RESUME_GUEST;
+ }
+
+ if (last_inst == KVMPPC_INST_SW_BREAKPOINT) {
+ run->exit_reason = KVM_EXIT_DEBUG;
+ run->debug.arch.address = kvmppc_get_pc(vcpu);
+ return RESUME_HOST;
+ } else {
+ kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
+ return RESUME_GUEST;
+ }
+}
+
+static int kvmppc_handle_exit_hv(struct kvm_run *run, struct kvm_vcpu *vcpu,
+ struct task_struct *tsk)
+{
+ int r = RESUME_HOST;
+
+ vcpu->stat.sum_exits++;
+
+ run->exit_reason = KVM_EXIT_UNKNOWN;
+ run->ready_for_interrupt_injection = 1;
+ switch (vcpu->arch.trap) {
+ /* We're good on these - the host merely wanted to get our attention */
+ case BOOK3S_INTERRUPT_HV_DECREMENTER:
+ vcpu->stat.dec_exits++;
+ r = RESUME_GUEST;
+ break;
+ case BOOK3S_INTERRUPT_EXTERNAL:
+ case BOOK3S_INTERRUPT_H_DOORBELL:
+ vcpu->stat.ext_intr_exits++;
+ r = RESUME_GUEST;
+ break;
+ /* HMI is hypervisor interrupt and host has handled it. Resume guest.*/
+ case BOOK3S_INTERRUPT_HMI:
+ case BOOK3S_INTERRUPT_PERFMON:
+ r = RESUME_GUEST;
+ break;
+ case BOOK3S_INTERRUPT_MACHINE_CHECK:
+ /*
+ * Deliver a machine check interrupt to the guest.
+ * We have to do this, even if the host has handled the
+ * machine check, because machine checks use SRR0/1 and
+ * the interrupt might have trashed guest state in them.
+ */
+ kvmppc_book3s_queue_irqprio(vcpu,
+ BOOK3S_INTERRUPT_MACHINE_CHECK);
+ r = RESUME_GUEST;
+ break;
+ case BOOK3S_INTERRUPT_PROGRAM:
+ {
+ ulong flags;
+ /*
+ * Normally program interrupts are delivered directly
+ * to the guest by the hardware, but we can get here
+ * as a result of a hypervisor emulation interrupt
+ * (e40) getting turned into a 700 by BML RTAS.
+ */
+ flags = vcpu->arch.shregs.msr & 0x1f0000ull;
+ kvmppc_core_queue_program(vcpu, flags);
+ r = RESUME_GUEST;
+ break;
+ }
+ case BOOK3S_INTERRUPT_SYSCALL:
+ {
+ /* hcall - punt to userspace */
+ int i;
+
+ /* hypercall with MSR_PR has already been handled in rmode,
+ * and never reaches here.
+ */
+
+ run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3);
+ for (i = 0; i < 9; ++i)
+ run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i);
+ run->exit_reason = KVM_EXIT_PAPR_HCALL;
+ vcpu->arch.hcall_needed = 1;
+ r = RESUME_HOST;
+ break;
+ }
+ /*
+ * We get these next two if the guest accesses a page which it thinks
+ * it has mapped but which is not actually present, either because
+ * it is for an emulated I/O device or because the corresonding
+ * host page has been paged out. Any other HDSI/HISI interrupts
+ * have been handled already.
+ */
+ case BOOK3S_INTERRUPT_H_DATA_STORAGE:
+ r = RESUME_PAGE_FAULT;
+ break;
+ case BOOK3S_INTERRUPT_H_INST_STORAGE:
+ vcpu->arch.fault_dar = kvmppc_get_pc(vcpu);
+ vcpu->arch.fault_dsisr = 0;
+ r = RESUME_PAGE_FAULT;
+ break;
+ /*
+ * This occurs if the guest executes an illegal instruction.
+ * If the guest debug is disabled, generate a program interrupt
+ * to the guest. If guest debug is enabled, we need to check
+ * whether the instruction is a software breakpoint instruction.
+ * Accordingly return to Guest or Host.
+ */
+ case BOOK3S_INTERRUPT_H_EMUL_ASSIST:
+ if (vcpu->arch.emul_inst != KVM_INST_FETCH_FAILED)
+ vcpu->arch.last_inst = kvmppc_need_byteswap(vcpu) ?
+ swab32(vcpu->arch.emul_inst) :
+ vcpu->arch.emul_inst;
+ if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) {
+ r = kvmppc_emulate_debug_inst(run, vcpu);
+ } else {
+ kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
+ r = RESUME_GUEST;
+ }
+ break;
+ /*
+ * This occurs if the guest (kernel or userspace), does something that
+ * is prohibited by HFSCR. We just generate a program interrupt to
+ * the guest.
+ */
+ case BOOK3S_INTERRUPT_H_FAC_UNAVAIL:
+ kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
+ r = RESUME_GUEST;
+ break;
+ default:
+ kvmppc_dump_regs(vcpu);
+ printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n",
+ vcpu->arch.trap, kvmppc_get_pc(vcpu),
+ vcpu->arch.shregs.msr);
+ run->hw.hardware_exit_reason = vcpu->arch.trap;
+ r = RESUME_HOST;
+ break;
+ }
+
+ return r;
+}
+
+static int kvm_arch_vcpu_ioctl_get_sregs_hv(struct kvm_vcpu *vcpu,
+ struct kvm_sregs *sregs)
+{
+ int i;
+
+ memset(sregs, 0, sizeof(struct kvm_sregs));
+ sregs->pvr = vcpu->arch.pvr;
+ for (i = 0; i < vcpu->arch.slb_max; i++) {
+ sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige;
+ sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv;
+ }
+
+ return 0;
+}
+
+static int kvm_arch_vcpu_ioctl_set_sregs_hv(struct kvm_vcpu *vcpu,
+ struct kvm_sregs *sregs)
+{
+ int i, j;
+
+ /* Only accept the same PVR as the host's, since we can't spoof it */
+ if (sregs->pvr != vcpu->arch.pvr)
+ return -EINVAL;
+
+ j = 0;
+ for (i = 0; i < vcpu->arch.slb_nr; i++) {
+ if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) {
+ vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe;
+ vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv;
+ ++j;
+ }
+ }
+ vcpu->arch.slb_max = j;
+
+ return 0;
+}
+
+static void kvmppc_set_lpcr(struct kvm_vcpu *vcpu, u64 new_lpcr,
+ bool preserve_top32)
+{
+ struct kvm *kvm = vcpu->kvm;
+ struct kvmppc_vcore *vc = vcpu->arch.vcore;
+ u64 mask;
+
+ mutex_lock(&kvm->lock);
+ spin_lock(&vc->lock);
+ /*
+ * If ILE (interrupt little-endian) has changed, update the
+ * MSR_LE bit in the intr_msr for each vcpu in this vcore.
+ */
+ if ((new_lpcr & LPCR_ILE) != (vc->lpcr & LPCR_ILE)) {
+ struct kvm_vcpu *vcpu;
+ int i;
+
+ kvm_for_each_vcpu(i, vcpu, kvm) {
+ if (vcpu->arch.vcore != vc)
+ continue;
+ if (new_lpcr & LPCR_ILE)
+ vcpu->arch.intr_msr |= MSR_LE;
+ else
+ vcpu->arch.intr_msr &= ~MSR_LE;
+ }
+ }
+
+ /*
+ * Userspace can only modify DPFD (default prefetch depth),
+ * ILE (interrupt little-endian) and TC (translation control).
+ * On POWER8 userspace can also modify AIL (alt. interrupt loc.)
+ */
+ mask = LPCR_DPFD | LPCR_ILE | LPCR_TC;
+ if (cpu_has_feature(CPU_FTR_ARCH_207S))
+ mask |= LPCR_AIL;
+
+ /* Broken 32-bit version of LPCR must not clear top bits */
+ if (preserve_top32)
+ mask &= 0xFFFFFFFF;
+ vc->lpcr = (vc->lpcr & ~mask) | (new_lpcr & mask);
+ spin_unlock(&vc->lock);
+ mutex_unlock(&kvm->lock);
+}
+
+static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id,
+ union kvmppc_one_reg *val)
+{
+ int r = 0;
+ long int i;
+
+ switch (id) {
+ case KVM_REG_PPC_DEBUG_INST:
+ *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT);
+ break;
+ case KVM_REG_PPC_HIOR:
+ *val = get_reg_val(id, 0);
+ break;
+ case KVM_REG_PPC_DABR:
+ *val = get_reg_val(id, vcpu->arch.dabr);
+ break;
+ case KVM_REG_PPC_DABRX:
+ *val = get_reg_val(id, vcpu->arch.dabrx);
+ break;
+ case KVM_REG_PPC_DSCR:
+ *val = get_reg_val(id, vcpu->arch.dscr);
+ break;
+ case KVM_REG_PPC_PURR:
+ *val = get_reg_val(id, vcpu->arch.purr);
+ break;
+ case KVM_REG_PPC_SPURR:
+ *val = get_reg_val(id, vcpu->arch.spurr);
+ break;
+ case KVM_REG_PPC_AMR:
+ *val = get_reg_val(id, vcpu->arch.amr);
+ break;
+ case KVM_REG_PPC_UAMOR:
+ *val = get_reg_val(id, vcpu->arch.uamor);
+ break;
+ case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS:
+ i = id - KVM_REG_PPC_MMCR0;
+ *val = get_reg_val(id, vcpu->arch.mmcr[i]);
+ break;
+ case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8:
+ i = id - KVM_REG_PPC_PMC1;
+ *val = get_reg_val(id, vcpu->arch.pmc[i]);
+ break;
+ case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2:
+ i = id - KVM_REG_PPC_SPMC1;
+ *val = get_reg_val(id, vcpu->arch.spmc[i]);
+ break;
+ case KVM_REG_PPC_SIAR:
+ *val = get_reg_val(id, vcpu->arch.siar);
+ break;
+ case KVM_REG_PPC_SDAR:
+ *val = get_reg_val(id, vcpu->arch.sdar);
+ break;
+ case KVM_REG_PPC_SIER:
+ *val = get_reg_val(id, vcpu->arch.sier);
+ break;
+ case KVM_REG_PPC_IAMR:
+ *val = get_reg_val(id, vcpu->arch.iamr);
+ break;
+ case KVM_REG_PPC_PSPB:
+ *val = get_reg_val(id, vcpu->arch.pspb);
+ break;
+ case KVM_REG_PPC_DPDES:
+ *val = get_reg_val(id, vcpu->arch.vcore->dpdes);
+ break;
+ case KVM_REG_PPC_DAWR:
+ *val = get_reg_val(id, vcpu->arch.dawr);
+ break;
+ case KVM_REG_PPC_DAWRX:
+ *val = get_reg_val(id, vcpu->arch.dawrx);
+ break;
+ case KVM_REG_PPC_CIABR:
+ *val = get_reg_val(id, vcpu->arch.ciabr);
+ break;
+ case KVM_REG_PPC_CSIGR:
+ *val = get_reg_val(id, vcpu->arch.csigr);
+ break;
+ case KVM_REG_PPC_TACR:
+ *val = get_reg_val(id, vcpu->arch.tacr);
+ break;
+ case KVM_REG_PPC_TCSCR:
+ *val = get_reg_val(id, vcpu->arch.tcscr);
+ break;
+ case KVM_REG_PPC_PID:
+ *val = get_reg_val(id, vcpu->arch.pid);
+ break;
+ case KVM_REG_PPC_ACOP:
+ *val = get_reg_val(id, vcpu->arch.acop);
+ break;
+ case KVM_REG_PPC_WORT:
+ *val = get_reg_val(id, vcpu->arch.wort);
+ break;
+ case KVM_REG_PPC_VPA_ADDR:
+ spin_lock(&vcpu->arch.vpa_update_lock);
+ *val = get_reg_val(id, vcpu->arch.vpa.next_gpa);
+ spin_unlock(&vcpu->arch.vpa_update_lock);
+ break;
+ case KVM_REG_PPC_VPA_SLB:
+ spin_lock(&vcpu->arch.vpa_update_lock);
+ val->vpaval.addr = vcpu->arch.slb_shadow.next_gpa;
+ val->vpaval.length = vcpu->arch.slb_shadow.len;
+ spin_unlock(&vcpu->arch.vpa_update_lock);
+ break;
+ case KVM_REG_PPC_VPA_DTL:
+ spin_lock(&vcpu->arch.vpa_update_lock);
+ val->vpaval.addr = vcpu->arch.dtl.next_gpa;
+ val->vpaval.length = vcpu->arch.dtl.len;
+ spin_unlock(&vcpu->arch.vpa_update_lock);
+ break;
+ case KVM_REG_PPC_TB_OFFSET:
+ *val = get_reg_val(id, vcpu->arch.vcore->tb_offset);
+ break;
+ case KVM_REG_PPC_LPCR:
+ case KVM_REG_PPC_LPCR_64:
+ *val = get_reg_val(id, vcpu->arch.vcore->lpcr);
+ break;
+ case KVM_REG_PPC_PPR:
+ *val = get_reg_val(id, vcpu->arch.ppr);
+ break;
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ case KVM_REG_PPC_TFHAR:
+ *val = get_reg_val(id, vcpu->arch.tfhar);
+ break;
+ case KVM_REG_PPC_TFIAR:
+ *val = get_reg_val(id, vcpu->arch.tfiar);
+ break;
+ case KVM_REG_PPC_TEXASR:
+ *val = get_reg_val(id, vcpu->arch.texasr);
+ break;
+ case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31:
+ i = id - KVM_REG_PPC_TM_GPR0;
+ *val = get_reg_val(id, vcpu->arch.gpr_tm[i]);
+ break;
+ case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63:
+ {
+ int j;
+ i = id - KVM_REG_PPC_TM_VSR0;
+ if (i < 32)
+ for (j = 0; j < TS_FPRWIDTH; j++)
+ val->vsxval[j] = vcpu->arch.fp_tm.fpr[i][j];
+ else {
+ if (cpu_has_feature(CPU_FTR_ALTIVEC))
+ val->vval = vcpu->arch.vr_tm.vr[i-32];
+ else
+ r = -ENXIO;
+ }
+ break;
+ }
+ case KVM_REG_PPC_TM_CR:
+ *val = get_reg_val(id, vcpu->arch.cr_tm);
+ break;
+ case KVM_REG_PPC_TM_LR:
+ *val = get_reg_val(id, vcpu->arch.lr_tm);
+ break;
+ case KVM_REG_PPC_TM_CTR:
+ *val = get_reg_val(id, vcpu->arch.ctr_tm);
+ break;
+ case KVM_REG_PPC_TM_FPSCR:
+ *val = get_reg_val(id, vcpu->arch.fp_tm.fpscr);
+ break;
+ case KVM_REG_PPC_TM_AMR:
+ *val = get_reg_val(id, vcpu->arch.amr_tm);
+ break;
+ case KVM_REG_PPC_TM_PPR:
+ *val = get_reg_val(id, vcpu->arch.ppr_tm);
+ break;
+ case KVM_REG_PPC_TM_VRSAVE:
+ *val = get_reg_val(id, vcpu->arch.vrsave_tm);
+ break;
+ case KVM_REG_PPC_TM_VSCR:
+ if (cpu_has_feature(CPU_FTR_ALTIVEC))
+ *val = get_reg_val(id, vcpu->arch.vr_tm.vscr.u[3]);
+ else
+ r = -ENXIO;
+ break;
+ case KVM_REG_PPC_TM_DSCR:
+ *val = get_reg_val(id, vcpu->arch.dscr_tm);
+ break;
+ case KVM_REG_PPC_TM_TAR:
+ *val = get_reg_val(id, vcpu->arch.tar_tm);
+ break;
+#endif
+ case KVM_REG_PPC_ARCH_COMPAT:
+ *val = get_reg_val(id, vcpu->arch.vcore->arch_compat);
+ break;
+ default:
+ r = -EINVAL;
+ break;
+ }
+
+ return r;
+}
+
+static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id,
+ union kvmppc_one_reg *val)
+{
+ int r = 0;
+ long int i;
+ unsigned long addr, len;
+
+ switch (id) {
+ case KVM_REG_PPC_HIOR:
+ /* Only allow this to be set to zero */
+ if (set_reg_val(id, *val))
+ r = -EINVAL;
+ break;
+ case KVM_REG_PPC_DABR:
+ vcpu->arch.dabr = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_DABRX:
+ vcpu->arch.dabrx = set_reg_val(id, *val) & ~DABRX_HYP;
+ break;
+ case KVM_REG_PPC_DSCR:
+ vcpu->arch.dscr = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_PURR:
+ vcpu->arch.purr = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_SPURR:
+ vcpu->arch.spurr = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_AMR:
+ vcpu->arch.amr = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_UAMOR:
+ vcpu->arch.uamor = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS:
+ i = id - KVM_REG_PPC_MMCR0;
+ vcpu->arch.mmcr[i] = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8:
+ i = id - KVM_REG_PPC_PMC1;
+ vcpu->arch.pmc[i] = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2:
+ i = id - KVM_REG_PPC_SPMC1;
+ vcpu->arch.spmc[i] = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_SIAR:
+ vcpu->arch.siar = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_SDAR:
+ vcpu->arch.sdar = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_SIER:
+ vcpu->arch.sier = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_IAMR:
+ vcpu->arch.iamr = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_PSPB:
+ vcpu->arch.pspb = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_DPDES:
+ vcpu->arch.vcore->dpdes = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_DAWR:
+ vcpu->arch.dawr = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_DAWRX:
+ vcpu->arch.dawrx = set_reg_val(id, *val) & ~DAWRX_HYP;
+ break;
+ case KVM_REG_PPC_CIABR:
+ vcpu->arch.ciabr = set_reg_val(id, *val);
+ /* Don't allow setting breakpoints in hypervisor code */
+ if ((vcpu->arch.ciabr & CIABR_PRIV) == CIABR_PRIV_HYPER)
+ vcpu->arch.ciabr &= ~CIABR_PRIV; /* disable */
+ break;
+ case KVM_REG_PPC_CSIGR:
+ vcpu->arch.csigr = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TACR:
+ vcpu->arch.tacr = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TCSCR:
+ vcpu->arch.tcscr = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_PID:
+ vcpu->arch.pid = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_ACOP:
+ vcpu->arch.acop = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_WORT:
+ vcpu->arch.wort = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_VPA_ADDR:
+ addr = set_reg_val(id, *val);
+ r = -EINVAL;
+ if (!addr && (vcpu->arch.slb_shadow.next_gpa ||
+ vcpu->arch.dtl.next_gpa))
+ break;
+ r = set_vpa(vcpu, &vcpu->arch.vpa, addr, sizeof(struct lppaca));
+ break;
+ case KVM_REG_PPC_VPA_SLB:
+ addr = val->vpaval.addr;
+ len = val->vpaval.length;
+ r = -EINVAL;
+ if (addr && !vcpu->arch.vpa.next_gpa)
+ break;
+ r = set_vpa(vcpu, &vcpu->arch.slb_shadow, addr, len);
+ break;
+ case KVM_REG_PPC_VPA_DTL:
+ addr = val->vpaval.addr;
+ len = val->vpaval.length;
+ r = -EINVAL;
+ if (addr && (len < sizeof(struct dtl_entry) ||
+ !vcpu->arch.vpa.next_gpa))
+ break;
+ len -= len % sizeof(struct dtl_entry);
+ r = set_vpa(vcpu, &vcpu->arch.dtl, addr, len);
+ break;
+ case KVM_REG_PPC_TB_OFFSET:
+ /* round up to multiple of 2^24 */
+ vcpu->arch.vcore->tb_offset =
+ ALIGN(set_reg_val(id, *val), 1UL << 24);
+ break;
+ case KVM_REG_PPC_LPCR:
+ kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), true);
+ break;
+ case KVM_REG_PPC_LPCR_64:
+ kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), false);
+ break;
+ case KVM_REG_PPC_PPR:
+ vcpu->arch.ppr = set_reg_val(id, *val);
+ break;
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ case KVM_REG_PPC_TFHAR:
+ vcpu->arch.tfhar = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TFIAR:
+ vcpu->arch.tfiar = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TEXASR:
+ vcpu->arch.texasr = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31:
+ i = id - KVM_REG_PPC_TM_GPR0;
+ vcpu->arch.gpr_tm[i] = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63:
+ {
+ int j;
+ i = id - KVM_REG_PPC_TM_VSR0;
+ if (i < 32)
+ for (j = 0; j < TS_FPRWIDTH; j++)
+ vcpu->arch.fp_tm.fpr[i][j] = val->vsxval[j];
+ else
+ if (cpu_has_feature(CPU_FTR_ALTIVEC))
+ vcpu->arch.vr_tm.vr[i-32] = val->vval;
+ else
+ r = -ENXIO;
+ break;
+ }
+ case KVM_REG_PPC_TM_CR:
+ vcpu->arch.cr_tm = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TM_LR:
+ vcpu->arch.lr_tm = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TM_CTR:
+ vcpu->arch.ctr_tm = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TM_FPSCR:
+ vcpu->arch.fp_tm.fpscr = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TM_AMR:
+ vcpu->arch.amr_tm = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TM_PPR:
+ vcpu->arch.ppr_tm = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TM_VRSAVE:
+ vcpu->arch.vrsave_tm = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TM_VSCR:
+ if (cpu_has_feature(CPU_FTR_ALTIVEC))
+ vcpu->arch.vr.vscr.u[3] = set_reg_val(id, *val);
+ else
+ r = - ENXIO;
+ break;
+ case KVM_REG_PPC_TM_DSCR:
+ vcpu->arch.dscr_tm = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TM_TAR:
+ vcpu->arch.tar_tm = set_reg_val(id, *val);
+ break;
+#endif
+ case KVM_REG_PPC_ARCH_COMPAT:
+ r = kvmppc_set_arch_compat(vcpu, set_reg_val(id, *val));
+ break;
+ default:
+ r = -EINVAL;
+ break;
+ }
+
+ return r;
+}
+
+static struct kvmppc_vcore *kvmppc_vcore_create(struct kvm *kvm, int core)
+{
+ struct kvmppc_vcore *vcore;
+
+ vcore = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL);
+
+ if (vcore == NULL)
+ return NULL;
+
+ INIT_LIST_HEAD(&vcore->runnable_threads);
+ spin_lock_init(&vcore->lock);
+ spin_lock_init(&vcore->stoltb_lock);
+ init_waitqueue_head(&vcore->wq);
+ vcore->preempt_tb = TB_NIL;
+ vcore->lpcr = kvm->arch.lpcr;
+ vcore->first_vcpuid = core * threads_per_subcore;
+ vcore->kvm = kvm;
+
+ vcore->mpp_buffer_is_valid = false;
+
+ if (cpu_has_feature(CPU_FTR_ARCH_207S))
+ vcore->mpp_buffer = (void *)__get_free_pages(
+ GFP_KERNEL|__GFP_ZERO,
+ MPP_BUFFER_ORDER);
+
+ return vcore;
+}
+
+#ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING
+static struct debugfs_timings_element {
+ const char *name;
+ size_t offset;
+} timings[] = {
+ {"rm_entry", offsetof(struct kvm_vcpu, arch.rm_entry)},
+ {"rm_intr", offsetof(struct kvm_vcpu, arch.rm_intr)},
+ {"rm_exit", offsetof(struct kvm_vcpu, arch.rm_exit)},
+ {"guest", offsetof(struct kvm_vcpu, arch.guest_time)},
+ {"cede", offsetof(struct kvm_vcpu, arch.cede_time)},
+};
+
+#define N_TIMINGS (sizeof(timings) / sizeof(timings[0]))
+
+struct debugfs_timings_state {
+ struct kvm_vcpu *vcpu;
+ unsigned int buflen;
+ char buf[N_TIMINGS * 100];
+};
+
+static int debugfs_timings_open(struct inode *inode, struct file *file)
+{
+ struct kvm_vcpu *vcpu = inode->i_private;
+ struct debugfs_timings_state *p;
+
+ p = kzalloc(sizeof(*p), GFP_KERNEL);
+ if (!p)
+ return -ENOMEM;
+
+ kvm_get_kvm(vcpu->kvm);
+ p->vcpu = vcpu;
+ file->private_data = p;
+
+ return nonseekable_open(inode, file);
+}
+
+static int debugfs_timings_release(struct inode *inode, struct file *file)
+{
+ struct debugfs_timings_state *p = file->private_data;
+
+ kvm_put_kvm(p->vcpu->kvm);
+ kfree(p);
+ return 0;
+}
+
+static ssize_t debugfs_timings_read(struct file *file, char __user *buf,
+ size_t len, loff_t *ppos)
+{
+ struct debugfs_timings_state *p = file->private_data;
+ struct kvm_vcpu *vcpu = p->vcpu;
+ char *s, *buf_end;
+ struct kvmhv_tb_accumulator tb;
+ u64 count;
+ loff_t pos;
+ ssize_t n;
+ int i, loops;
+ bool ok;
+
+ if (!p->buflen) {
+ s = p->buf;
+ buf_end = s + sizeof(p->buf);
+ for (i = 0; i < N_TIMINGS; ++i) {
+ struct kvmhv_tb_accumulator *acc;
+
+ acc = (struct kvmhv_tb_accumulator *)
+ ((unsigned long)vcpu + timings[i].offset);
+ ok = false;
+ for (loops = 0; loops < 1000; ++loops) {
+ count = acc->seqcount;
+ if (!(count & 1)) {
+ smp_rmb();
+ tb = *acc;
+ smp_rmb();
+ if (count == acc->seqcount) {
+ ok = true;
+ break;
+ }
+ }
+ udelay(1);
+ }
+ if (!ok)
+ snprintf(s, buf_end - s, "%s: stuck\n",
+ timings[i].name);
+ else
+ snprintf(s, buf_end - s,
+ "%s: %llu %llu %llu %llu\n",
+ timings[i].name, count / 2,
+ tb_to_ns(tb.tb_total),
+ tb_to_ns(tb.tb_min),
+ tb_to_ns(tb.tb_max));
+ s += strlen(s);
+ }
+ p->buflen = s - p->buf;
+ }
+
+ pos = *ppos;
+ if (pos >= p->buflen)
+ return 0;
+ if (len > p->buflen - pos)
+ len = p->buflen - pos;
+ n = copy_to_user(buf, p->buf + pos, len);
+ if (n) {
+ if (n == len)
+ return -EFAULT;
+ len -= n;
+ }
+ *ppos = pos + len;
+ return len;
+}
+
+static ssize_t debugfs_timings_write(struct file *file, const char __user *buf,
+ size_t len, loff_t *ppos)
+{
+ return -EACCES;
+}
+
+static const struct file_operations debugfs_timings_ops = {
+ .owner = THIS_MODULE,
+ .open = debugfs_timings_open,
+ .release = debugfs_timings_release,
+ .read = debugfs_timings_read,
+ .write = debugfs_timings_write,
+ .llseek = generic_file_llseek,
+};
+
+/* Create a debugfs directory for the vcpu */
+static void debugfs_vcpu_init(struct kvm_vcpu *vcpu, unsigned int id)
+{
+ char buf[16];
+ struct kvm *kvm = vcpu->kvm;
+
+ snprintf(buf, sizeof(buf), "vcpu%u", id);
+ if (IS_ERR_OR_NULL(kvm->arch.debugfs_dir))
+ return;
+ vcpu->arch.debugfs_dir = debugfs_create_dir(buf, kvm->arch.debugfs_dir);
+ if (IS_ERR_OR_NULL(vcpu->arch.debugfs_dir))
+ return;
+ vcpu->arch.debugfs_timings =
+ debugfs_create_file("timings", 0444, vcpu->arch.debugfs_dir,
+ vcpu, &debugfs_timings_ops);
+}
+
+#else /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */
+static void debugfs_vcpu_init(struct kvm_vcpu *vcpu, unsigned int id)
+{
+}
+#endif /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */
+
+static struct kvm_vcpu *kvmppc_core_vcpu_create_hv(struct kvm *kvm,
+ unsigned int id)
+{
+ struct kvm_vcpu *vcpu;
+ int err = -EINVAL;
+ int core;
+ struct kvmppc_vcore *vcore;
+
+ core = id / threads_per_subcore;
+ if (core >= KVM_MAX_VCORES)
+ goto out;
+
+ err = -ENOMEM;
+ vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
+ if (!vcpu)
+ goto out;
+
+ err = kvm_vcpu_init(vcpu, kvm, id);
+ if (err)
+ goto free_vcpu;
+
+ vcpu->arch.shared = &vcpu->arch.shregs;
+#ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE
+ /*
+ * The shared struct is never shared on HV,
+ * so we can always use host endianness
+ */
+#ifdef __BIG_ENDIAN__
+ vcpu->arch.shared_big_endian = true;
+#else
+ vcpu->arch.shared_big_endian = false;
+#endif
+#endif
+ vcpu->arch.mmcr[0] = MMCR0_FC;
+ vcpu->arch.ctrl = CTRL_RUNLATCH;
+ /* default to host PVR, since we can't spoof it */
+ kvmppc_set_pvr_hv(vcpu, mfspr(SPRN_PVR));
+ spin_lock_init(&vcpu->arch.vpa_update_lock);
+ spin_lock_init(&vcpu->arch.tbacct_lock);
+ vcpu->arch.busy_preempt = TB_NIL;
+ vcpu->arch.intr_msr = MSR_SF | MSR_ME;
+
+ kvmppc_mmu_book3s_hv_init(vcpu);
+
+ vcpu->arch.state = KVMPPC_VCPU_NOTREADY;
+
+ init_waitqueue_head(&vcpu->arch.cpu_run);
+
+ mutex_lock(&kvm->lock);
+ vcore = kvm->arch.vcores[core];
+ if (!vcore) {
+ vcore = kvmppc_vcore_create(kvm, core);
+ kvm->arch.vcores[core] = vcore;
+ kvm->arch.online_vcores++;
+ }
+ mutex_unlock(&kvm->lock);
+
+ if (!vcore)
+ goto free_vcpu;
+
+ spin_lock(&vcore->lock);
+ ++vcore->num_threads;
+ spin_unlock(&vcore->lock);
+ vcpu->arch.vcore = vcore;
+ vcpu->arch.ptid = vcpu->vcpu_id - vcore->first_vcpuid;
+
+ vcpu->arch.cpu_type = KVM_CPU_3S_64;
+ kvmppc_sanity_check(vcpu);
+
+ debugfs_vcpu_init(vcpu, id);
+
+ return vcpu;
+
+free_vcpu:
+ kmem_cache_free(kvm_vcpu_cache, vcpu);
+out:
+ return ERR_PTR(err);
+}
+
+static void unpin_vpa(struct kvm *kvm, struct kvmppc_vpa *vpa)
+{
+ if (vpa->pinned_addr)
+ kvmppc_unpin_guest_page(kvm, vpa->pinned_addr, vpa->gpa,
+ vpa->dirty);
+}
+
+static void kvmppc_core_vcpu_free_hv(struct kvm_vcpu *vcpu)
+{
+ spin_lock(&vcpu->arch.vpa_update_lock);
+ unpin_vpa(vcpu->kvm, &vcpu->arch.dtl);
+ unpin_vpa(vcpu->kvm, &vcpu->arch.slb_shadow);
+ unpin_vpa(vcpu->kvm, &vcpu->arch.vpa);
+ spin_unlock(&vcpu->arch.vpa_update_lock);
+ kvm_vcpu_uninit(vcpu);
+ kmem_cache_free(kvm_vcpu_cache, vcpu);
+}
+
+static int kvmppc_core_check_requests_hv(struct kvm_vcpu *vcpu)
+{
+ /* Indicate we want to get back into the guest */
+ return 1;
+}
+
+static void kvmppc_set_timer(struct kvm_vcpu *vcpu)
+{
+ unsigned long dec_nsec, now;
+
+ now = get_tb();
+ if (now > vcpu->arch.dec_expires) {
+ /* decrementer has already gone negative */
+ kvmppc_core_queue_dec(vcpu);
+ kvmppc_core_prepare_to_enter(vcpu);
+ return;
+ }
+ dec_nsec = (vcpu->arch.dec_expires - now) * NSEC_PER_SEC
+ / tb_ticks_per_sec;
+ hrtimer_start(&vcpu->arch.dec_timer, ktime_set(0, dec_nsec),
+ HRTIMER_MODE_REL);
+ vcpu->arch.timer_running = 1;
+}
+
+static void kvmppc_end_cede(struct kvm_vcpu *vcpu)
+{
+ vcpu->arch.ceded = 0;
+ if (vcpu->arch.timer_running) {
+ hrtimer_try_to_cancel(&vcpu->arch.dec_timer);
+ vcpu->arch.timer_running = 0;
+ }
+}
+
+extern void __kvmppc_vcore_entry(void);
+
+static void kvmppc_remove_runnable(struct kvmppc_vcore *vc,
+ struct kvm_vcpu *vcpu)
+{
+ u64 now;
+
+ if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE)
+ return;
+ spin_lock_irq(&vcpu->arch.tbacct_lock);
+ now = mftb();
+ vcpu->arch.busy_stolen += vcore_stolen_time(vc, now) -
+ vcpu->arch.stolen_logged;
+ vcpu->arch.busy_preempt = now;
+ vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST;
+ spin_unlock_irq(&vcpu->arch.tbacct_lock);
+ --vc->n_runnable;
+ list_del(&vcpu->arch.run_list);
+}
+
+static int kvmppc_grab_hwthread(int cpu)
+{
+ struct paca_struct *tpaca;
+ long timeout = 10000;
+
+ tpaca = &paca[cpu];
+
+ /* Ensure the thread won't go into the kernel if it wakes */
+ tpaca->kvm_hstate.kvm_vcpu = NULL;
+ tpaca->kvm_hstate.napping = 0;
+ smp_wmb();
+ tpaca->kvm_hstate.hwthread_req = 1;
+
+ /*
+ * If the thread is already executing in the kernel (e.g. handling
+ * a stray interrupt), wait for it to get back to nap mode.
+ * The smp_mb() is to ensure that our setting of hwthread_req
+ * is visible before we look at hwthread_state, so if this
+ * races with the code at system_reset_pSeries and the thread
+ * misses our setting of hwthread_req, we are sure to see its
+ * setting of hwthread_state, and vice versa.
+ */
+ smp_mb();
+ while (tpaca->kvm_hstate.hwthread_state == KVM_HWTHREAD_IN_KERNEL) {
+ if (--timeout <= 0) {
+ pr_err("KVM: couldn't grab cpu %d\n", cpu);
+ return -EBUSY;
+ }
+ udelay(1);
+ }
+ return 0;
+}
+
+static void kvmppc_release_hwthread(int cpu)
+{
+ struct paca_struct *tpaca;
+
+ tpaca = &paca[cpu];
+ tpaca->kvm_hstate.hwthread_req = 0;
+ tpaca->kvm_hstate.kvm_vcpu = NULL;
+}
+
+static void kvmppc_start_thread(struct kvm_vcpu *vcpu)
+{
+ int cpu;
+ struct paca_struct *tpaca;
+ struct kvmppc_vcore *vc = vcpu->arch.vcore;
+
+ if (vcpu->arch.timer_running) {
+ hrtimer_try_to_cancel(&vcpu->arch.dec_timer);
+ vcpu->arch.timer_running = 0;
+ }
+ cpu = vc->pcpu + vcpu->arch.ptid;
+ tpaca = &paca[cpu];
+ tpaca->kvm_hstate.kvm_vcore = vc;
+ tpaca->kvm_hstate.ptid = vcpu->arch.ptid;
+ vcpu->cpu = vc->pcpu;
+ /* Order stores to hstate.kvm_vcore etc. before store to kvm_vcpu */
+ smp_wmb();
+ tpaca->kvm_hstate.kvm_vcpu = vcpu;
+ if (cpu != smp_processor_id())
+ kvmppc_ipi_thread(cpu);
+}
+
+static void kvmppc_wait_for_nap(void)
+{
+ int cpu = smp_processor_id();
+ int i, loops;
+
+ for (loops = 0; loops < 1000000; ++loops) {
+ /*
+ * Check if all threads are finished.
+ * We set the vcpu pointer when starting a thread
+ * and the thread clears it when finished, so we look
+ * for any threads that still have a non-NULL vcpu ptr.
+ */
+ for (i = 1; i < threads_per_subcore; ++i)
+ if (paca[cpu + i].kvm_hstate.kvm_vcpu)
+ break;
+ if (i == threads_per_subcore) {
+ HMT_medium();
+ return;
+ }
+ HMT_low();
+ }
+ HMT_medium();
+ for (i = 1; i < threads_per_subcore; ++i)
+ if (paca[cpu + i].kvm_hstate.kvm_vcpu)
+ pr_err("KVM: CPU %d seems to be stuck\n", cpu + i);
+}
+
+/*
+ * Check that we are on thread 0 and that any other threads in
+ * this core are off-line. Then grab the threads so they can't
+ * enter the kernel.
+ */
+static int on_primary_thread(void)
+{
+ int cpu = smp_processor_id();
+ int thr;
+
+ /* Are we on a primary subcore? */
+ if (cpu_thread_in_subcore(cpu))
+ return 0;
+
+ thr = 0;
+ while (++thr < threads_per_subcore)
+ if (cpu_online(cpu + thr))
+ return 0;
+
+ /* Grab all hw threads so they can't go into the kernel */
+ for (thr = 1; thr < threads_per_subcore; ++thr) {
+ if (kvmppc_grab_hwthread(cpu + thr)) {
+ /* Couldn't grab one; let the others go */
+ do {
+ kvmppc_release_hwthread(cpu + thr);
+ } while (--thr > 0);
+ return 0;
+ }
+ }
+ return 1;
+}
+
+static void kvmppc_start_saving_l2_cache(struct kvmppc_vcore *vc)
+{
+ phys_addr_t phy_addr, mpp_addr;
+
+ phy_addr = (phys_addr_t)virt_to_phys(vc->mpp_buffer);
+ mpp_addr = phy_addr & PPC_MPPE_ADDRESS_MASK;
+
+ mtspr(SPRN_MPPR, mpp_addr | PPC_MPPR_FETCH_ABORT);
+ logmpp(mpp_addr | PPC_LOGMPP_LOG_L2);
+
+ vc->mpp_buffer_is_valid = true;
+}
+
+static void kvmppc_start_restoring_l2_cache(const struct kvmppc_vcore *vc)
+{
+ phys_addr_t phy_addr, mpp_addr;
+
+ phy_addr = virt_to_phys(vc->mpp_buffer);
+ mpp_addr = phy_addr & PPC_MPPE_ADDRESS_MASK;
+
+ /* We must abort any in-progress save operations to ensure
+ * the table is valid so that prefetch engine knows when to
+ * stop prefetching. */
+ logmpp(mpp_addr | PPC_LOGMPP_LOG_ABORT);
+ mtspr(SPRN_MPPR, mpp_addr | PPC_MPPR_FETCH_WHOLE_TABLE);
+}
+
+static void prepare_threads(struct kvmppc_vcore *vc)
+{
+ struct kvm_vcpu *vcpu, *vnext;
+
+ list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads,
+ arch.run_list) {
+ if (signal_pending(vcpu->arch.run_task))
+ vcpu->arch.ret = -EINTR;
+ else if (vcpu->arch.vpa.update_pending ||
+ vcpu->arch.slb_shadow.update_pending ||
+ vcpu->arch.dtl.update_pending)
+ vcpu->arch.ret = RESUME_GUEST;
+ else
+ continue;
+ kvmppc_remove_runnable(vc, vcpu);
+ wake_up(&vcpu->arch.cpu_run);
+ }
+}
+
+static void post_guest_process(struct kvmppc_vcore *vc)
+{
+ u64 now;
+ long ret;
+ struct kvm_vcpu *vcpu, *vnext;
+
+ now = get_tb();
+ list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads,
+ arch.run_list) {
+ /* cancel pending dec exception if dec is positive */
+ if (now < vcpu->arch.dec_expires &&
+ kvmppc_core_pending_dec(vcpu))
+ kvmppc_core_dequeue_dec(vcpu);
+
+ trace_kvm_guest_exit(vcpu);
+
+ ret = RESUME_GUEST;
+ if (vcpu->arch.trap)
+ ret = kvmppc_handle_exit_hv(vcpu->arch.kvm_run, vcpu,
+ vcpu->arch.run_task);
+
+ vcpu->arch.ret = ret;
+ vcpu->arch.trap = 0;
+
+ if (vcpu->arch.ceded) {
+ if (!is_kvmppc_resume_guest(ret))
+ kvmppc_end_cede(vcpu);
+ else
+ kvmppc_set_timer(vcpu);
+ }
+ if (!is_kvmppc_resume_guest(vcpu->arch.ret)) {
+ kvmppc_remove_runnable(vc, vcpu);
+ wake_up(&vcpu->arch.cpu_run);
+ }
+ }
+}
+
+/*
+ * Run a set of guest threads on a physical core.
+ * Called with vc->lock held.
+ */
+static noinline void kvmppc_run_core(struct kvmppc_vcore *vc)
+{
+ struct kvm_vcpu *vcpu, *vnext;
+ int i;
+ int srcu_idx;
+
+ /*
+ * Remove from the list any threads that have a signal pending
+ * or need a VPA update done
+ */
+ prepare_threads(vc);
+
+ /* if the runner is no longer runnable, let the caller pick a new one */
+ if (vc->runner->arch.state != KVMPPC_VCPU_RUNNABLE)
+ return;
+
+ /*
+ * Initialize *vc.
+ */
+ vc->entry_exit_map = 0;
+ vc->preempt_tb = TB_NIL;
+ vc->in_guest = 0;
+ vc->napping_threads = 0;
+ vc->conferring_threads = 0;
+
+ /*
+ * Make sure we are running on primary threads, and that secondary
+ * threads are offline. Also check if the number of threads in this
+ * guest are greater than the current system threads per guest.
+ */
+ if ((threads_per_core > 1) &&
+ ((vc->num_threads > threads_per_subcore) || !on_primary_thread())) {
+ list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads,
+ arch.run_list) {
+ vcpu->arch.ret = -EBUSY;
+ kvmppc_remove_runnable(vc, vcpu);
+ wake_up(&vcpu->arch.cpu_run);
+ }
+ goto out;
+ }
+
+
+ vc->pcpu = smp_processor_id();
+ list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) {
+ kvmppc_start_thread(vcpu);
+ kvmppc_create_dtl_entry(vcpu, vc);
+ trace_kvm_guest_enter(vcpu);
+ }
+
+ /* Set this explicitly in case thread 0 doesn't have a vcpu */
+ get_paca()->kvm_hstate.kvm_vcore = vc;
+ get_paca()->kvm_hstate.ptid = 0;
+
+ vc->vcore_state = VCORE_RUNNING;
+ preempt_disable();
+
+ trace_kvmppc_run_core(vc, 0);
+
+ spin_unlock(&vc->lock);
+
+ kvm_guest_enter();
+
+ srcu_idx = srcu_read_lock(&vc->kvm->srcu);
+
+ if (vc->mpp_buffer_is_valid)
+ kvmppc_start_restoring_l2_cache(vc);
+
+ __kvmppc_vcore_entry();
+
+ spin_lock(&vc->lock);
+
+ if (vc->mpp_buffer)
+ kvmppc_start_saving_l2_cache(vc);
+
+ /* disable sending of IPIs on virtual external irqs */
+ list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list)
+ vcpu->cpu = -1;
+ /* wait for secondary threads to finish writing their state to memory */
+ kvmppc_wait_for_nap();
+ for (i = 0; i < threads_per_subcore; ++i)
+ kvmppc_release_hwthread(vc->pcpu + i);
+ /* prevent other vcpu threads from doing kvmppc_start_thread() now */
+ vc->vcore_state = VCORE_EXITING;
+ spin_unlock(&vc->lock);
+
+ srcu_read_unlock(&vc->kvm->srcu, srcu_idx);
+
+ /* make sure updates to secondary vcpu structs are visible now */
+ smp_mb();
+ kvm_guest_exit();
+
+ preempt_enable();
+
+ spin_lock(&vc->lock);
+ post_guest_process(vc);
+
+ out:
+ vc->vcore_state = VCORE_INACTIVE;
+ trace_kvmppc_run_core(vc, 1);
+}
+
+/*
+ * Wait for some other vcpu thread to execute us, and
+ * wake us up when we need to handle something in the host.
+ */
+static void kvmppc_wait_for_exec(struct kvm_vcpu *vcpu, int wait_state)
+{
+ DEFINE_WAIT(wait);
+
+ prepare_to_wait(&vcpu->arch.cpu_run, &wait, wait_state);
+ if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE)
+ schedule();
+ finish_wait(&vcpu->arch.cpu_run, &wait);
+}
+
+/*
+ * All the vcpus in this vcore are idle, so wait for a decrementer
+ * or external interrupt to one of the vcpus. vc->lock is held.
+ */
+static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc)
+{
+ struct kvm_vcpu *vcpu;
+ int do_sleep = 1;
+
+ DEFINE_WAIT(wait);
+
+ prepare_to_wait(&vc->wq, &wait, TASK_INTERRUPTIBLE);
+
+ /*
+ * Check one last time for pending exceptions and ceded state after
+ * we put ourselves on the wait queue
+ */
+ list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) {
+ if (vcpu->arch.pending_exceptions || !vcpu->arch.ceded) {
+ do_sleep = 0;
+ break;
+ }
+ }
+
+ if (!do_sleep) {
+ finish_wait(&vc->wq, &wait);
+ return;
+ }
+
+ vc->vcore_state = VCORE_SLEEPING;
+ trace_kvmppc_vcore_blocked(vc, 0);
+ spin_unlock(&vc->lock);
+ schedule();
+ finish_wait(&vc->wq, &wait);
+ spin_lock(&vc->lock);
+ vc->vcore_state = VCORE_INACTIVE;
+ trace_kvmppc_vcore_blocked(vc, 1);
+}
+
+static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
+{
+ int n_ceded;
+ struct kvmppc_vcore *vc;
+ struct kvm_vcpu *v, *vn;
+
+ trace_kvmppc_run_vcpu_enter(vcpu);
+
+ kvm_run->exit_reason = 0;
+ vcpu->arch.ret = RESUME_GUEST;
+ vcpu->arch.trap = 0;
+ kvmppc_update_vpas(vcpu);
+
+ /*
+ * Synchronize with other threads in this virtual core
+ */
+ vc = vcpu->arch.vcore;
+ spin_lock(&vc->lock);
+ vcpu->arch.ceded = 0;
+ vcpu->arch.run_task = current;
+ vcpu->arch.kvm_run = kvm_run;
+ vcpu->arch.stolen_logged = vcore_stolen_time(vc, mftb());
+ vcpu->arch.state = KVMPPC_VCPU_RUNNABLE;
+ vcpu->arch.busy_preempt = TB_NIL;
+ list_add_tail(&vcpu->arch.run_list, &vc->runnable_threads);
+ ++vc->n_runnable;
+
+ /*
+ * This happens the first time this is called for a vcpu.
+ * If the vcore is already running, we may be able to start
+ * this thread straight away and have it join in.
+ */
+ if (!signal_pending(current)) {
+ if (vc->vcore_state == VCORE_RUNNING && !VCORE_IS_EXITING(vc)) {
+ kvmppc_create_dtl_entry(vcpu, vc);
+ kvmppc_start_thread(vcpu);
+ trace_kvm_guest_enter(vcpu);
+ } else if (vc->vcore_state == VCORE_SLEEPING) {
+ wake_up(&vc->wq);
+ }
+
+ }
+
+ while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE &&
+ !signal_pending(current)) {
+ if (vc->vcore_state != VCORE_INACTIVE) {
+ spin_unlock(&vc->lock);
+ kvmppc_wait_for_exec(vcpu, TASK_INTERRUPTIBLE);
+ spin_lock(&vc->lock);
+ continue;
+ }
+ list_for_each_entry_safe(v, vn, &vc->runnable_threads,
+ arch.run_list) {
+ kvmppc_core_prepare_to_enter(v);
+ if (signal_pending(v->arch.run_task)) {
+ kvmppc_remove_runnable(vc, v);
+ v->stat.signal_exits++;
+ v->arch.kvm_run->exit_reason = KVM_EXIT_INTR;
+ v->arch.ret = -EINTR;
+ wake_up(&v->arch.cpu_run);
+ }
+ }
+ if (!vc->n_runnable || vcpu->arch.state != KVMPPC_VCPU_RUNNABLE)
+ break;
+ n_ceded = 0;
+ list_for_each_entry(v, &vc->runnable_threads, arch.run_list) {
+ if (!v->arch.pending_exceptions)
+ n_ceded += v->arch.ceded;
+ else
+ v->arch.ceded = 0;
+ }
+ vc->runner = vcpu;
+ if (n_ceded == vc->n_runnable) {
+ kvmppc_vcore_blocked(vc);
+ } else if (should_resched()) {
+ vc->vcore_state = VCORE_PREEMPT;
+ /* Let something else run */
+ cond_resched_lock(&vc->lock);
+ vc->vcore_state = VCORE_INACTIVE;
+ } else {
+ kvmppc_run_core(vc);
+ }
+ vc->runner = NULL;
+ }
+
+ while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE &&
+ (vc->vcore_state == VCORE_RUNNING ||
+ vc->vcore_state == VCORE_EXITING)) {
+ spin_unlock(&vc->lock);
+ kvmppc_wait_for_exec(vcpu, TASK_UNINTERRUPTIBLE);
+ spin_lock(&vc->lock);
+ }
+
+ if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) {
+ kvmppc_remove_runnable(vc, vcpu);
+ vcpu->stat.signal_exits++;
+ kvm_run->exit_reason = KVM_EXIT_INTR;
+ vcpu->arch.ret = -EINTR;
+ }
+
+ if (vc->n_runnable && vc->vcore_state == VCORE_INACTIVE) {
+ /* Wake up some vcpu to run the core */
+ v = list_first_entry(&vc->runnable_threads,
+ struct kvm_vcpu, arch.run_list);
+ wake_up(&v->arch.cpu_run);
+ }
+
+ trace_kvmppc_run_vcpu_exit(vcpu, kvm_run);
+ spin_unlock(&vc->lock);
+ return vcpu->arch.ret;
+}
+
+static int kvmppc_vcpu_run_hv(struct kvm_run *run, struct kvm_vcpu *vcpu)
+{
+ int r;
+ int srcu_idx;
+
+ if (!vcpu->arch.sane) {
+ run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
+ return -EINVAL;
+ }
+
+ kvmppc_core_prepare_to_enter(vcpu);
+
+ /* No need to go into the guest when all we'll do is come back out */
+ if (signal_pending(current)) {
+ run->exit_reason = KVM_EXIT_INTR;
+ return -EINTR;
+ }
+
+ atomic_inc(&vcpu->kvm->arch.vcpus_running);
+ /* Order vcpus_running vs. hpte_setup_done, see kvmppc_alloc_reset_hpt */
+ smp_mb();
+
+ /* On the first time here, set up HTAB and VRMA */
+ if (!vcpu->kvm->arch.hpte_setup_done) {
+ r = kvmppc_hv_setup_htab_rma(vcpu);
+ if (r)
+ goto out;
+ }
+
+ flush_fp_to_thread(current);
+ flush_altivec_to_thread(current);
+ flush_vsx_to_thread(current);
+ vcpu->arch.wqp = &vcpu->arch.vcore->wq;
+ vcpu->arch.pgdir = current->mm->pgd;
+ vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST;
+
+ do {
+ r = kvmppc_run_vcpu(run, vcpu);
+
+ if (run->exit_reason == KVM_EXIT_PAPR_HCALL &&
+ !(vcpu->arch.shregs.msr & MSR_PR)) {
+ trace_kvm_hcall_enter(vcpu);
+ r = kvmppc_pseries_do_hcall(vcpu);
+ trace_kvm_hcall_exit(vcpu, r);
+ kvmppc_core_prepare_to_enter(vcpu);
+ } else if (r == RESUME_PAGE_FAULT) {
+ srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
+ r = kvmppc_book3s_hv_page_fault(run, vcpu,
+ vcpu->arch.fault_dar, vcpu->arch.fault_dsisr);
+ srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
+ }
+ } while (is_kvmppc_resume_guest(r));
+
+ out:
+ vcpu->arch.state = KVMPPC_VCPU_NOTREADY;
+ atomic_dec(&vcpu->kvm->arch.vcpus_running);
+ return r;
+}
+
+static void kvmppc_add_seg_page_size(struct kvm_ppc_one_seg_page_size **sps,
+ int linux_psize)
+{
+ struct mmu_psize_def *def = &mmu_psize_defs[linux_psize];
+
+ if (!def->shift)
+ return;
+ (*sps)->page_shift = def->shift;
+ (*sps)->slb_enc = def->sllp;
+ (*sps)->enc[0].page_shift = def->shift;
+ (*sps)->enc[0].pte_enc = def->penc[linux_psize];
+ /*
+ * Add 16MB MPSS support if host supports it
+ */
+ if (linux_psize != MMU_PAGE_16M && def->penc[MMU_PAGE_16M] != -1) {
+ (*sps)->enc[1].page_shift = 24;
+ (*sps)->enc[1].pte_enc = def->penc[MMU_PAGE_16M];
+ }
+ (*sps)++;
+}
+
+static int kvm_vm_ioctl_get_smmu_info_hv(struct kvm *kvm,
+ struct kvm_ppc_smmu_info *info)
+{
+ struct kvm_ppc_one_seg_page_size *sps;
+
+ info->flags = KVM_PPC_PAGE_SIZES_REAL;
+ if (mmu_has_feature(MMU_FTR_1T_SEGMENT))
+ info->flags |= KVM_PPC_1T_SEGMENTS;
+ info->slb_size = mmu_slb_size;
+
+ /* We only support these sizes for now, and no muti-size segments */
+ sps = &info->sps[0];
+ kvmppc_add_seg_page_size(&sps, MMU_PAGE_4K);
+ kvmppc_add_seg_page_size(&sps, MMU_PAGE_64K);
+ kvmppc_add_seg_page_size(&sps, MMU_PAGE_16M);
+
+ return 0;
+}
+
+/*
+ * Get (and clear) the dirty memory log for a memory slot.
+ */
+static int kvm_vm_ioctl_get_dirty_log_hv(struct kvm *kvm,
+ struct kvm_dirty_log *log)
+{
+ struct kvm_memory_slot *memslot;
+ int r;
+ unsigned long n;
+
+ mutex_lock(&kvm->slots_lock);
+
+ r = -EINVAL;
+ if (log->slot >= KVM_USER_MEM_SLOTS)
+ goto out;
+
+ memslot = id_to_memslot(kvm->memslots, log->slot);
+ r = -ENOENT;
+ if (!memslot->dirty_bitmap)
+ goto out;
+
+ n = kvm_dirty_bitmap_bytes(memslot);
+ memset(memslot->dirty_bitmap, 0, n);
+
+ r = kvmppc_hv_get_dirty_log(kvm, memslot, memslot->dirty_bitmap);
+ if (r)
+ goto out;
+
+ r = -EFAULT;
+ if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n))
+ goto out;
+
+ r = 0;
+out:
+ mutex_unlock(&kvm->slots_lock);
+ return r;
+}
+
+static void kvmppc_core_free_memslot_hv(struct kvm_memory_slot *free,
+ struct kvm_memory_slot *dont)
+{
+ if (!dont || free->arch.rmap != dont->arch.rmap) {
+ vfree(free->arch.rmap);
+ free->arch.rmap = NULL;
+ }
+}
+
+static int kvmppc_core_create_memslot_hv(struct kvm_memory_slot *slot,
+ unsigned long npages)
+{
+ slot->arch.rmap = vzalloc(npages * sizeof(*slot->arch.rmap));
+ if (!slot->arch.rmap)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int kvmppc_core_prepare_memory_region_hv(struct kvm *kvm,
+ struct kvm_memory_slot *memslot,
+ struct kvm_userspace_memory_region *mem)
+{
+ return 0;
+}
+
+static void kvmppc_core_commit_memory_region_hv(struct kvm *kvm,
+ struct kvm_userspace_memory_region *mem,
+ const struct kvm_memory_slot *old)
+{
+ unsigned long npages = mem->memory_size >> PAGE_SHIFT;
+ struct kvm_memory_slot *memslot;
+
+ if (npages && old->npages) {
+ /*
+ * If modifying a memslot, reset all the rmap dirty bits.
+ * If this is a new memslot, we don't need to do anything
+ * since the rmap array starts out as all zeroes,
+ * i.e. no pages are dirty.
+ */
+ memslot = id_to_memslot(kvm->memslots, mem->slot);
+ kvmppc_hv_get_dirty_log(kvm, memslot, NULL);
+ }
+}
+
+/*
+ * Update LPCR values in kvm->arch and in vcores.
+ * Caller must hold kvm->lock.
+ */
+void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr, unsigned long mask)
+{
+ long int i;
+ u32 cores_done = 0;
+
+ if ((kvm->arch.lpcr & mask) == lpcr)
+ return;
+
+ kvm->arch.lpcr = (kvm->arch.lpcr & ~mask) | lpcr;
+
+ for (i = 0; i < KVM_MAX_VCORES; ++i) {
+ struct kvmppc_vcore *vc = kvm->arch.vcores[i];
+ if (!vc)
+ continue;
+ spin_lock(&vc->lock);
+ vc->lpcr = (vc->lpcr & ~mask) | lpcr;
+ spin_unlock(&vc->lock);
+ if (++cores_done >= kvm->arch.online_vcores)
+ break;
+ }
+}
+
+static void kvmppc_mmu_destroy_hv(struct kvm_vcpu *vcpu)
+{
+ return;
+}
+
+static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu)
+{
+ int err = 0;
+ struct kvm *kvm = vcpu->kvm;
+ unsigned long hva;
+ struct kvm_memory_slot *memslot;
+ struct vm_area_struct *vma;
+ unsigned long lpcr = 0, senc;
+ unsigned long psize, porder;
+ int srcu_idx;
+
+ mutex_lock(&kvm->lock);
+ if (kvm->arch.hpte_setup_done)
+ goto out; /* another vcpu beat us to it */
+
+ /* Allocate hashed page table (if not done already) and reset it */
+ if (!kvm->arch.hpt_virt) {
+ err = kvmppc_alloc_hpt(kvm, NULL);
+ if (err) {
+ pr_err("KVM: Couldn't alloc HPT\n");
+ goto out;
+ }
+ }
+
+ /* Look up the memslot for guest physical address 0 */
+ srcu_idx = srcu_read_lock(&kvm->srcu);
+ memslot = gfn_to_memslot(kvm, 0);
+
+ /* We must have some memory at 0 by now */
+ err = -EINVAL;
+ if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID))
+ goto out_srcu;
+
+ /* Look up the VMA for the start of this memory slot */
+ hva = memslot->userspace_addr;
+ down_read(&current->mm->mmap_sem);
+ vma = find_vma(current->mm, hva);
+ if (!vma || vma->vm_start > hva || (vma->vm_flags & VM_IO))
+ goto up_out;
+
+ psize = vma_kernel_pagesize(vma);
+ porder = __ilog2(psize);
+
+ up_read(&current->mm->mmap_sem);
+
+ /* We can handle 4k, 64k or 16M pages in the VRMA */
+ err = -EINVAL;
+ if (!(psize == 0x1000 || psize == 0x10000 ||
+ psize == 0x1000000))
+ goto out_srcu;
+
+ /* Update VRMASD field in the LPCR */
+ senc = slb_pgsize_encoding(psize);
+ kvm->arch.vrma_slb_v = senc | SLB_VSID_B_1T |
+ (VRMA_VSID << SLB_VSID_SHIFT_1T);
+ /* the -4 is to account for senc values starting at 0x10 */
+ lpcr = senc << (LPCR_VRMASD_SH - 4);
+
+ /* Create HPTEs in the hash page table for the VRMA */
+ kvmppc_map_vrma(vcpu, memslot, porder);
+
+ kvmppc_update_lpcr(kvm, lpcr, LPCR_VRMASD);
+
+ /* Order updates to kvm->arch.lpcr etc. vs. hpte_setup_done */
+ smp_wmb();
+ kvm->arch.hpte_setup_done = 1;
+ err = 0;
+ out_srcu:
+ srcu_read_unlock(&kvm->srcu, srcu_idx);
+ out:
+ mutex_unlock(&kvm->lock);
+ return err;
+
+ up_out:
+ up_read(&current->mm->mmap_sem);
+ goto out_srcu;
+}
+
+static int kvmppc_core_init_vm_hv(struct kvm *kvm)
+{
+ unsigned long lpcr, lpid;
+ char buf[32];
+
+ /* Allocate the guest's logical partition ID */
+
+ lpid = kvmppc_alloc_lpid();
+ if ((long)lpid < 0)
+ return -ENOMEM;
+ kvm->arch.lpid = lpid;
+
+ /*
+ * Since we don't flush the TLB when tearing down a VM,
+ * and this lpid might have previously been used,
+ * make sure we flush on each core before running the new VM.
+ */
+ cpumask_setall(&kvm->arch.need_tlb_flush);
+
+ /* Start out with the default set of hcalls enabled */
+ memcpy(kvm->arch.enabled_hcalls, default_enabled_hcalls,
+ sizeof(kvm->arch.enabled_hcalls));
+
+ kvm->arch.host_sdr1 = mfspr(SPRN_SDR1);
+
+ /* Init LPCR for virtual RMA mode */
+ kvm->arch.host_lpid = mfspr(SPRN_LPID);
+ kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR);
+ lpcr &= LPCR_PECE | LPCR_LPES;
+ lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE |
+ LPCR_VPM0 | LPCR_VPM1;
+ kvm->arch.vrma_slb_v = SLB_VSID_B_1T |
+ (VRMA_VSID << SLB_VSID_SHIFT_1T);
+ /* On POWER8 turn on online bit to enable PURR/SPURR */
+ if (cpu_has_feature(CPU_FTR_ARCH_207S))
+ lpcr |= LPCR_ONL;
+ kvm->arch.lpcr = lpcr;
+
+ /*
+ * Track that we now have a HV mode VM active. This blocks secondary
+ * CPU threads from coming online.
+ */
+ kvm_hv_vm_activated();
+
+ /*
+ * Create a debugfs directory for the VM
+ */
+ snprintf(buf, sizeof(buf), "vm%d", current->pid);
+ kvm->arch.debugfs_dir = debugfs_create_dir(buf, kvm_debugfs_dir);
+ if (!IS_ERR_OR_NULL(kvm->arch.debugfs_dir))
+ kvmppc_mmu_debugfs_init(kvm);
+
+ return 0;
+}
+
+static void kvmppc_free_vcores(struct kvm *kvm)
+{
+ long int i;
+
+ for (i = 0; i < KVM_MAX_VCORES; ++i) {
+ if (kvm->arch.vcores[i] && kvm->arch.vcores[i]->mpp_buffer) {
+ struct kvmppc_vcore *vc = kvm->arch.vcores[i];
+ free_pages((unsigned long)vc->mpp_buffer,
+ MPP_BUFFER_ORDER);
+ }
+ kfree(kvm->arch.vcores[i]);
+ }
+ kvm->arch.online_vcores = 0;
+}
+
+static void kvmppc_core_destroy_vm_hv(struct kvm *kvm)
+{
+ debugfs_remove_recursive(kvm->arch.debugfs_dir);
+
+ kvm_hv_vm_deactivated();
+
+ kvmppc_free_vcores(kvm);
+
+ kvmppc_free_hpt(kvm);
+}
+
+/* We don't need to emulate any privileged instructions or dcbz */
+static int kvmppc_core_emulate_op_hv(struct kvm_run *run, struct kvm_vcpu *vcpu,
+ unsigned int inst, int *advance)
+{
+ return EMULATE_FAIL;
+}
+
+static int kvmppc_core_emulate_mtspr_hv(struct kvm_vcpu *vcpu, int sprn,
+ ulong spr_val)
+{
+ return EMULATE_FAIL;
+}
+
+static int kvmppc_core_emulate_mfspr_hv(struct kvm_vcpu *vcpu, int sprn,
+ ulong *spr_val)
+{
+ return EMULATE_FAIL;
+}
+
+static int kvmppc_core_check_processor_compat_hv(void)
+{
+ if (!cpu_has_feature(CPU_FTR_HVMODE) ||
+ !cpu_has_feature(CPU_FTR_ARCH_206))
+ return -EIO;
+ return 0;
+}
+
+static long kvm_arch_vm_ioctl_hv(struct file *filp,
+ unsigned int ioctl, unsigned long arg)
+{
+ struct kvm *kvm __maybe_unused = filp->private_data;
+ void __user *argp = (void __user *)arg;
+ long r;
+
+ switch (ioctl) {
+
+ case KVM_PPC_ALLOCATE_HTAB: {
+ u32 htab_order;
+
+ r = -EFAULT;
+ if (get_user(htab_order, (u32 __user *)argp))
+ break;
+ r = kvmppc_alloc_reset_hpt(kvm, &htab_order);
+ if (r)
+ break;
+ r = -EFAULT;
+ if (put_user(htab_order, (u32 __user *)argp))
+ break;
+ r = 0;
+ break;
+ }
+
+ case KVM_PPC_GET_HTAB_FD: {
+ struct kvm_get_htab_fd ghf;
+
+ r = -EFAULT;
+ if (copy_from_user(&ghf, argp, sizeof(ghf)))
+ break;
+ r = kvm_vm_ioctl_get_htab_fd(kvm, &ghf);
+ break;
+ }
+
+ default:
+ r = -ENOTTY;
+ }
+
+ return r;
+}
+
+/*
+ * List of hcall numbers to enable by default.
+ * For compatibility with old userspace, we enable by default
+ * all hcalls that were implemented before the hcall-enabling
+ * facility was added. Note this list should not include H_RTAS.
+ */
+static unsigned int default_hcall_list[] = {
+ H_REMOVE,
+ H_ENTER,
+ H_READ,
+ H_PROTECT,
+ H_BULK_REMOVE,
+ H_GET_TCE,
+ H_PUT_TCE,
+ H_SET_DABR,
+ H_SET_XDABR,
+ H_CEDE,
+ H_PROD,
+ H_CONFER,
+ H_REGISTER_VPA,
+#ifdef CONFIG_KVM_XICS
+ H_EOI,
+ H_CPPR,
+ H_IPI,
+ H_IPOLL,
+ H_XIRR,
+ H_XIRR_X,
+#endif
+ 0
+};
+
+static void init_default_hcalls(void)
+{
+ int i;
+ unsigned int hcall;
+
+ for (i = 0; default_hcall_list[i]; ++i) {
+ hcall = default_hcall_list[i];
+ WARN_ON(!kvmppc_hcall_impl_hv(hcall));
+ __set_bit(hcall / 4, default_enabled_hcalls);
+ }
+}
+
+static struct kvmppc_ops kvm_ops_hv = {
+ .get_sregs = kvm_arch_vcpu_ioctl_get_sregs_hv,
+ .set_sregs = kvm_arch_vcpu_ioctl_set_sregs_hv,
+ .get_one_reg = kvmppc_get_one_reg_hv,
+ .set_one_reg = kvmppc_set_one_reg_hv,
+ .vcpu_load = kvmppc_core_vcpu_load_hv,
+ .vcpu_put = kvmppc_core_vcpu_put_hv,
+ .set_msr = kvmppc_set_msr_hv,
+ .vcpu_run = kvmppc_vcpu_run_hv,
+ .vcpu_create = kvmppc_core_vcpu_create_hv,
+ .vcpu_free = kvmppc_core_vcpu_free_hv,
+ .check_requests = kvmppc_core_check_requests_hv,
+ .get_dirty_log = kvm_vm_ioctl_get_dirty_log_hv,
+ .flush_memslot = kvmppc_core_flush_memslot_hv,
+ .prepare_memory_region = kvmppc_core_prepare_memory_region_hv,
+ .commit_memory_region = kvmppc_core_commit_memory_region_hv,
+ .unmap_hva = kvm_unmap_hva_hv,
+ .unmap_hva_range = kvm_unmap_hva_range_hv,
+ .age_hva = kvm_age_hva_hv,
+ .test_age_hva = kvm_test_age_hva_hv,
+ .set_spte_hva = kvm_set_spte_hva_hv,
+ .mmu_destroy = kvmppc_mmu_destroy_hv,
+ .free_memslot = kvmppc_core_free_memslot_hv,
+ .create_memslot = kvmppc_core_create_memslot_hv,
+ .init_vm = kvmppc_core_init_vm_hv,
+ .destroy_vm = kvmppc_core_destroy_vm_hv,
+ .get_smmu_info = kvm_vm_ioctl_get_smmu_info_hv,
+ .emulate_op = kvmppc_core_emulate_op_hv,
+ .emulate_mtspr = kvmppc_core_emulate_mtspr_hv,
+ .emulate_mfspr = kvmppc_core_emulate_mfspr_hv,
+ .fast_vcpu_kick = kvmppc_fast_vcpu_kick_hv,
+ .arch_vm_ioctl = kvm_arch_vm_ioctl_hv,
+ .hcall_implemented = kvmppc_hcall_impl_hv,
+};
+
+static int kvmppc_book3s_init_hv(void)
+{
+ int r;
+ /*
+ * FIXME!! Do we need to check on all cpus ?
+ */
+ r = kvmppc_core_check_processor_compat_hv();
+ if (r < 0)
+ return -ENODEV;
+
+ kvm_ops_hv.owner = THIS_MODULE;
+ kvmppc_hv_ops = &kvm_ops_hv;
+
+ init_default_hcalls();
+
+ r = kvmppc_mmu_hv_init();
+ return r;
+}
+
+static void kvmppc_book3s_exit_hv(void)
+{
+ kvmppc_hv_ops = NULL;
+}
+
+module_init(kvmppc_book3s_init_hv);
+module_exit(kvmppc_book3s_exit_hv);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(KVM_MINOR);
+MODULE_ALIAS("devname:kvm");
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-17 02:14:16 +0000