Initial import

1 files changed, 290 insertions, 0 deletions

diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h
new file mode 100644
index 000000000..ca108b90a
--- /dev/null
+++ b/arch/s390/kvm/kvm-s390.h
@@ -0,0 +1,290 @@
+/*
+ * definition for kvm on s390
+ *
+ * Copyright IBM Corp. 2008, 2009
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License (version 2 only)
+ * as published by the Free Software Foundation.
+ *
+ *    Author(s): Carsten Otte <cotte@de.ibm.com>
+ *               Christian Borntraeger <borntraeger@de.ibm.com>
+ *               Christian Ehrhardt <ehrhardt@de.ibm.com>
+ */
+
+#ifndef ARCH_S390_KVM_S390_H
+#define ARCH_S390_KVM_S390_H
+
+#include <linux/hrtimer.h>
+#include <linux/kvm.h>
+#include <linux/kvm_host.h>
+#include <asm/facility.h>
+
+typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu);
+
+/* Transactional Memory Execution related macros */
+#define IS_TE_ENABLED(vcpu)	((vcpu->arch.sie_block->ecb & 0x10))
+#define TDB_FORMAT1		1
+#define IS_ITDB_VALID(vcpu)	((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1))
+
+#define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
+do { \
+	debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
+	  d_args); \
+} while (0)
+
+#define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
+do { \
+	debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \
+	  "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \
+	  d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\
+	  d_args); \
+} while (0)
+
+static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
+{
+	return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED;
+}
+
+static inline int kvm_is_ucontrol(struct kvm *kvm)
+{
+#ifdef CONFIG_KVM_S390_UCONTROL
+	if (kvm->arch.gmap)
+		return 0;
+	return 1;
+#else
+	return 0;
+#endif
+}
+
+#define GUEST_PREFIX_SHIFT 13
+static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu)
+{
+	return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT;
+}
+
+static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
+{
+	vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT;
+	kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
+	kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
+}
+
+typedef u8 __bitwise ar_t;
+
+static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, ar_t *ar)
+{
+	u32 base2 = vcpu->arch.sie_block->ipb >> 28;
+	u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
+
+	if (ar)
+		*ar = base2;
+
+	return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
+}
+
+static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
+					      u64 *address1, u64 *address2,
+					      ar_t *ar_b1, ar_t *ar_b2)
+{
+	u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
+	u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
+	u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
+	u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
+
+	*address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
+	*address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
+
+	if (ar_b1)
+		*ar_b1 = base1;
+	if (ar_b2)
+		*ar_b2 = base2;
+}
+
+static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
+{
+	if (r1)
+		*r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
+	if (r2)
+		*r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
+}
+
+static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, ar_t *ar)
+{
+	u32 base2 = vcpu->arch.sie_block->ipb >> 28;
+	u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
+			((vcpu->arch.sie_block->ipb & 0xff00) << 4);
+	/* The displacement is a 20bit _SIGNED_ value */
+	if (disp2 & 0x80000)
+		disp2+=0xfff00000;
+
+	if (ar)
+		*ar = base2;
+
+	return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
+}
+
+static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, ar_t *ar)
+{
+	u32 base2 = vcpu->arch.sie_block->ipb >> 28;
+	u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
+
+	if (ar)
+		*ar = base2;
+
+	return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
+}
+
+/* Set the condition code in the guest program status word */
+static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc)
+{
+	vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44);
+	vcpu->arch.sie_block->gpsw.mask |= cc << 44;
+}
+
+/* test availability of facility in a kvm instance */
+static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr)
+{
+	return __test_facility(nr, kvm->arch.model.fac->mask) &&
+		__test_facility(nr, kvm->arch.model.fac->list);
+}
+
+static inline int set_kvm_facility(u64 *fac_list, unsigned long nr)
+{
+	unsigned char *ptr;
+
+	if (nr >= MAX_FACILITY_BIT)
+		return -EINVAL;
+	ptr = (unsigned char *) fac_list + (nr >> 3);
+	*ptr |= (0x80UL >> (nr & 7));
+	return 0;
+}
+
+/* are cpu states controlled by user space */
+static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
+{
+	return kvm->arch.user_cpu_state_ctrl != 0;
+}
+
+int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
+void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
+enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
+int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
+void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
+void kvm_s390_clear_float_irqs(struct kvm *kvm);
+int __must_check kvm_s390_inject_vm(struct kvm *kvm,
+				    struct kvm_s390_interrupt *s390int);
+int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
+				      struct kvm_s390_irq *irq);
+int __must_check kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code);
+struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
+						    u64 isc_mask, u32 schid);
+int kvm_s390_reinject_io_int(struct kvm *kvm,
+			     struct kvm_s390_interrupt_info *inti);
+int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
+
+/* implemented in intercept.c */
+void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilc);
+int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
+
+/* implemented in priv.c */
+int is_valid_psw(psw_t *psw);
+int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
+int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
+int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
+int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
+int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
+int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
+int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
+int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
+
+/* implemented in sigp.c */
+int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
+int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
+
+/* implemented in kvm-s390.c */
+long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable);
+int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
+int kvm_s390_store_adtl_status_unloaded(struct kvm_vcpu *vcpu,
+					unsigned long addr);
+int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
+int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr);
+void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
+void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
+void s390_vcpu_block(struct kvm_vcpu *vcpu);
+void s390_vcpu_unblock(struct kvm_vcpu *vcpu);
+void exit_sie(struct kvm_vcpu *vcpu);
+void exit_sie_sync(struct kvm_vcpu *vcpu);
+int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
+void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
+/* is cmma enabled */
+bool kvm_s390_cmma_enabled(struct kvm *kvm);
+unsigned long kvm_s390_fac_list_mask_size(void);
+extern unsigned long kvm_s390_fac_list_mask[];
+
+/* implemented in diag.c */
+int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
+/* implemented in interrupt.c */
+int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
+			     struct kvm_s390_pgm_info *pgm_info);
+
+/**
+ * kvm_s390_inject_prog_cond - conditionally inject a program check
+ * @vcpu: virtual cpu
+ * @rc: original return/error code
+ *
+ * This function is supposed to be used after regular guest access functions
+ * failed, to conditionally inject a program check to a vcpu. The typical
+ * pattern would look like
+ *
+ * rc = write_guest(vcpu, addr, data, len);
+ * if (rc)
+ *	return kvm_s390_inject_prog_cond(vcpu, rc);
+ *
+ * A negative return code from guest access functions implies an internal error
+ * like e.g. out of memory. In these cases no program check should be injected
+ * to the guest.
+ * A positive value implies that an exception happened while accessing a guest's
+ * memory. In this case all data belonging to the corresponding program check
+ * has been stored in vcpu->arch.pgm and can be injected with
+ * kvm_s390_inject_prog_irq().
+ *
+ * Returns: - the original @rc value if @rc was negative (internal error)
+ *	    - zero if @rc was already zero
+ *	    - zero or error code from injecting if @rc was positive
+ *	      (program check injected to @vcpu)
+ */
+static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
+{
+	if (rc <= 0)
+		return rc;
+	return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
+}
+
+int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
+			struct kvm_s390_irq *s390irq);
+
+/* implemented in interrupt.c */
+int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop);
+int psw_extint_disabled(struct kvm_vcpu *vcpu);
+void kvm_s390_destroy_adapters(struct kvm *kvm);
+int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu);
+extern struct kvm_device_ops kvm_flic_ops;
+int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu);
+void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu);
+int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu,
+			   void __user *buf, int len);
+int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu,
+			   __u8 __user *buf, int len);
+
+/* implemented in guestdbg.c */
+void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
+void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
+void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
+int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
+			    struct kvm_guest_debug *dbg);
+void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
+void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
+void kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
+
+#endif