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Diffstat (limited to 'arch/x86/kvm/x86.c')
-rw-r--r--arch/x86/kvm/x86.c374
1 files changed, 305 insertions, 69 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 18b5ca7a31974..b2ff74b12ec45 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -102,6 +102,8 @@ static void update_cr8_intercept(struct kvm_vcpu *vcpu);
static void process_nmi(struct kvm_vcpu *vcpu);
static void enter_smm(struct kvm_vcpu *vcpu);
static void __kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags);
+static void store_regs(struct kvm_vcpu *vcpu);
+static int sync_regs(struct kvm_vcpu *vcpu);
struct kvm_x86_ops *kvm_x86_ops __read_mostly;
EXPORT_SYMBOL_GPL(kvm_x86_ops);
@@ -140,6 +142,13 @@ module_param(lapic_timer_advance_ns, uint, S_IRUGO | S_IWUSR);
static bool __read_mostly vector_hashing = true;
module_param(vector_hashing, bool, S_IRUGO);
+bool __read_mostly enable_vmware_backdoor = false;
+module_param(enable_vmware_backdoor, bool, S_IRUGO);
+EXPORT_SYMBOL_GPL(enable_vmware_backdoor);
+
+static bool __read_mostly force_emulation_prefix = false;
+module_param(force_emulation_prefix, bool, S_IRUGO);
+
#define KVM_NR_SHARED_MSRS 16
struct kvm_shared_msrs_global {
@@ -1032,7 +1041,11 @@ static u32 emulated_msrs[] = {
HV_X64_MSR_VP_RUNTIME,
HV_X64_MSR_SCONTROL,
HV_X64_MSR_STIMER0_CONFIG,
- HV_X64_MSR_APIC_ASSIST_PAGE, MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME,
+ HV_X64_MSR_VP_ASSIST_PAGE,
+ HV_X64_MSR_REENLIGHTENMENT_CONTROL, HV_X64_MSR_TSC_EMULATION_CONTROL,
+ HV_X64_MSR_TSC_EMULATION_STATUS,
+
+ MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME,
MSR_KVM_PV_EOI_EN,
MSR_IA32_TSC_ADJUST,
@@ -1054,6 +1067,25 @@ static unsigned num_emulated_msrs;
* can be used by a hypervisor to validate requested CPU features.
*/
static u32 msr_based_features[] = {
+ MSR_IA32_VMX_BASIC,
+ MSR_IA32_VMX_TRUE_PINBASED_CTLS,
+ MSR_IA32_VMX_PINBASED_CTLS,
+ MSR_IA32_VMX_TRUE_PROCBASED_CTLS,
+ MSR_IA32_VMX_PROCBASED_CTLS,
+ MSR_IA32_VMX_TRUE_EXIT_CTLS,
+ MSR_IA32_VMX_EXIT_CTLS,
+ MSR_IA32_VMX_TRUE_ENTRY_CTLS,
+ MSR_IA32_VMX_ENTRY_CTLS,
+ MSR_IA32_VMX_MISC,
+ MSR_IA32_VMX_CR0_FIXED0,
+ MSR_IA32_VMX_CR0_FIXED1,
+ MSR_IA32_VMX_CR4_FIXED0,
+ MSR_IA32_VMX_CR4_FIXED1,
+ MSR_IA32_VMX_VMCS_ENUM,
+ MSR_IA32_VMX_PROCBASED_CTLS2,
+ MSR_IA32_VMX_EPT_VPID_CAP,
+ MSR_IA32_VMX_VMFUNC,
+
MSR_F10H_DECFG,
MSR_IA32_UCODE_REV,
};
@@ -2432,6 +2464,9 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4:
case HV_X64_MSR_CRASH_CTL:
case HV_X64_MSR_STIMER0_CONFIG ... HV_X64_MSR_STIMER3_COUNT:
+ case HV_X64_MSR_REENLIGHTENMENT_CONTROL:
+ case HV_X64_MSR_TSC_EMULATION_CONTROL:
+ case HV_X64_MSR_TSC_EMULATION_STATUS:
return kvm_hv_set_msr_common(vcpu, msr, data,
msr_info->host_initiated);
case MSR_IA32_BBL_CR_CTL3:
@@ -2558,6 +2593,7 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
case MSR_AMD64_DC_CFG:
msr_info->data = 0;
break;
+ case MSR_F15H_PERF_CTL0 ... MSR_F15H_PERF_CTR5:
case MSR_K7_EVNTSEL0 ... MSR_K7_EVNTSEL3:
case MSR_K7_PERFCTR0 ... MSR_K7_PERFCTR3:
case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR1:
@@ -2661,6 +2697,9 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4:
case HV_X64_MSR_CRASH_CTL:
case HV_X64_MSR_STIMER0_CONFIG ... HV_X64_MSR_STIMER3_COUNT:
+ case HV_X64_MSR_REENLIGHTENMENT_CONTROL:
+ case HV_X64_MSR_TSC_EMULATION_CONTROL:
+ case HV_X64_MSR_TSC_EMULATION_STATUS:
return kvm_hv_get_msr_common(vcpu,
msr_info->index, &msr_info->data);
break;
@@ -2777,9 +2816,15 @@ out:
return r;
}
+static inline bool kvm_can_mwait_in_guest(void)
+{
+ return boot_cpu_has(X86_FEATURE_MWAIT) &&
+ !boot_cpu_has_bug(X86_BUG_MONITOR);
+}
+
int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
{
- int r;
+ int r = 0;
switch (ext) {
case KVM_CAP_IRQCHIP:
@@ -2809,6 +2854,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_HYPERV_SYNIC:
case KVM_CAP_HYPERV_SYNIC2:
case KVM_CAP_HYPERV_VP_INDEX:
+ case KVM_CAP_HYPERV_EVENTFD:
case KVM_CAP_PCI_SEGMENT:
case KVM_CAP_DEBUGREGS:
case KVM_CAP_X86_ROBUST_SINGLESTEP:
@@ -2828,11 +2874,16 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_GET_MSR_FEATURES:
r = 1;
break;
+ case KVM_CAP_SYNC_REGS:
+ r = KVM_SYNC_X86_VALID_FIELDS;
+ break;
case KVM_CAP_ADJUST_CLOCK:
r = KVM_CLOCK_TSC_STABLE;
break;
- case KVM_CAP_X86_GUEST_MWAIT:
- r = kvm_mwait_in_guest();
+ case KVM_CAP_X86_DISABLE_EXITS:
+ r |= KVM_X86_DISABLE_EXITS_HTL | KVM_X86_DISABLE_EXITS_PAUSE;
+ if(kvm_can_mwait_in_guest())
+ r |= KVM_X86_DISABLE_EXITS_MWAIT;
break;
case KVM_CAP_X86_SMM:
/* SMBASE is usually relocated above 1M on modern chipsets,
@@ -2873,7 +2924,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
r = KVM_X2APIC_API_VALID_FLAGS;
break;
default:
- r = 0;
break;
}
return r;
@@ -3265,7 +3315,7 @@ static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu,
events->exception.error_code = vcpu->arch.exception.error_code;
events->interrupt.injected =
- vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft;
+ vcpu->arch.interrupt.injected && !vcpu->arch.interrupt.soft;
events->interrupt.nr = vcpu->arch.interrupt.nr;
events->interrupt.soft = 0;
events->interrupt.shadow = kvm_x86_ops->get_interrupt_shadow(vcpu);
@@ -3318,7 +3368,7 @@ static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu,
vcpu->arch.exception.has_error_code = events->exception.has_error_code;
vcpu->arch.exception.error_code = events->exception.error_code;
- vcpu->arch.interrupt.pending = events->interrupt.injected;
+ vcpu->arch.interrupt.injected = events->interrupt.injected;
vcpu->arch.interrupt.nr = events->interrupt.nr;
vcpu->arch.interrupt.soft = events->interrupt.soft;
if (events->flags & KVM_VCPUEVENT_VALID_SHADOW)
@@ -3917,8 +3967,7 @@ static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr)
static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm,
u64 ident_addr)
{
- kvm->arch.ept_identity_map_addr = ident_addr;
- return 0;
+ return kvm_x86_ops->set_identity_map_addr(kvm, ident_addr);
}
static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
@@ -4178,6 +4227,20 @@ split_irqchip_unlock:
r = 0;
break;
+ case KVM_CAP_X86_DISABLE_EXITS:
+ r = -EINVAL;
+ if (cap->args[0] & ~KVM_X86_DISABLE_VALID_EXITS)
+ break;
+
+ if ((cap->args[0] & KVM_X86_DISABLE_EXITS_MWAIT) &&
+ kvm_can_mwait_in_guest())
+ kvm->arch.mwait_in_guest = true;
+ if (cap->args[0] & KVM_X86_DISABLE_EXITS_HTL)
+ kvm->arch.hlt_in_guest = true;
+ if (cap->args[0] & KVM_X86_DISABLE_EXITS_PAUSE)
+ kvm->arch.pause_in_guest = true;
+ r = 0;
+ break;
default:
r = -EINVAL;
break;
@@ -4482,6 +4545,15 @@ set_identity_unlock:
r = kvm_x86_ops->mem_enc_unreg_region(kvm, &region);
break;
}
+ case KVM_HYPERV_EVENTFD: {
+ struct kvm_hyperv_eventfd hvevfd;
+
+ r = -EFAULT;
+ if (copy_from_user(&hvevfd, argp, sizeof(hvevfd)))
+ goto out;
+ r = kvm_vm_ioctl_hv_eventfd(kvm, &hvevfd);
+ break;
+ }
default:
r = -ENOTTY;
}
@@ -4771,6 +4843,30 @@ out:
}
EXPORT_SYMBOL_GPL(kvm_write_guest_virt_system);
+int handle_ud(struct kvm_vcpu *vcpu)
+{
+ int emul_type = EMULTYPE_TRAP_UD;
+ enum emulation_result er;
+ char sig[5]; /* ud2; .ascii "kvm" */
+ struct x86_exception e;
+
+ if (force_emulation_prefix &&
+ kvm_read_guest_virt(&vcpu->arch.emulate_ctxt,
+ kvm_get_linear_rip(vcpu), sig, sizeof(sig), &e) == 0 &&
+ memcmp(sig, "\xf\xbkvm", sizeof(sig)) == 0) {
+ kvm_rip_write(vcpu, kvm_rip_read(vcpu) + sizeof(sig));
+ emul_type = 0;
+ }
+
+ er = emulate_instruction(vcpu, emul_type);
+ if (er == EMULATE_USER_EXIT)
+ return 0;
+ if (er != EMULATE_DONE)
+ kvm_queue_exception(vcpu, UD_VECTOR);
+ return 1;
+}
+EXPORT_SYMBOL_GPL(handle_ud);
+
static int vcpu_is_mmio_gpa(struct kvm_vcpu *vcpu, unsigned long gva,
gpa_t gpa, bool write)
{
@@ -5612,27 +5708,27 @@ int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip)
kvm_rip_write(vcpu, ctxt->eip);
kvm_set_rflags(vcpu, ctxt->eflags);
- if (irq == NMI_VECTOR)
- vcpu->arch.nmi_pending = 0;
- else
- vcpu->arch.interrupt.pending = false;
-
return EMULATE_DONE;
}
EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt);
-static int handle_emulation_failure(struct kvm_vcpu *vcpu)
+static int handle_emulation_failure(struct kvm_vcpu *vcpu, int emulation_type)
{
int r = EMULATE_DONE;
++vcpu->stat.insn_emulation_fail;
trace_kvm_emulate_insn_failed(vcpu);
+
+ if (emulation_type & EMULTYPE_NO_UD_ON_FAIL)
+ return EMULATE_FAIL;
+
if (!is_guest_mode(vcpu) && kvm_x86_ops->get_cpl(vcpu) == 0) {
vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
vcpu->run->internal.ndata = 0;
r = EMULATE_USER_EXIT;
}
+
kvm_queue_exception(vcpu, UD_VECTOR);
return r;
@@ -5876,6 +5972,37 @@ static bool kvm_vcpu_check_breakpoint(struct kvm_vcpu *vcpu, int *r)
return false;
}
+static bool is_vmware_backdoor_opcode(struct x86_emulate_ctxt *ctxt)
+{
+ switch (ctxt->opcode_len) {
+ case 1:
+ switch (ctxt->b) {
+ case 0xe4: /* IN */
+ case 0xe5:
+ case 0xec:
+ case 0xed:
+ case 0xe6: /* OUT */
+ case 0xe7:
+ case 0xee:
+ case 0xef:
+ case 0x6c: /* INS */
+ case 0x6d:
+ case 0x6e: /* OUTS */
+ case 0x6f:
+ return true;
+ }
+ break;
+ case 2:
+ switch (ctxt->b) {
+ case 0x33: /* RDPMC */
+ return true;
+ }
+ break;
+ }
+
+ return false;
+}
+
int x86_emulate_instruction(struct kvm_vcpu *vcpu,
unsigned long cr2,
int emulation_type,
@@ -5928,10 +6055,14 @@ int x86_emulate_instruction(struct kvm_vcpu *vcpu,
return EMULATE_DONE;
if (emulation_type & EMULTYPE_SKIP)
return EMULATE_FAIL;
- return handle_emulation_failure(vcpu);
+ return handle_emulation_failure(vcpu, emulation_type);
}
}
+ if ((emulation_type & EMULTYPE_VMWARE) &&
+ !is_vmware_backdoor_opcode(ctxt))
+ return EMULATE_FAIL;
+
if (emulation_type & EMULTYPE_SKIP) {
kvm_rip_write(vcpu, ctxt->_eip);
if (ctxt->eflags & X86_EFLAGS_RF)
@@ -5963,7 +6094,7 @@ restart:
emulation_type))
return EMULATE_DONE;
- return handle_emulation_failure(vcpu);
+ return handle_emulation_failure(vcpu, emulation_type);
}
if (ctxt->have_exception) {
@@ -6016,7 +6147,8 @@ restart:
}
EXPORT_SYMBOL_GPL(x86_emulate_instruction);
-int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port)
+static int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size,
+ unsigned short port)
{
unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX);
int ret = emulator_pio_out_emulated(&vcpu->arch.emulate_ctxt,
@@ -6025,7 +6157,6 @@ int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port)
vcpu->arch.pio.count = 0;
return ret;
}
-EXPORT_SYMBOL_GPL(kvm_fast_pio_out);
static int complete_fast_pio_in(struct kvm_vcpu *vcpu)
{
@@ -6049,7 +6180,8 @@ static int complete_fast_pio_in(struct kvm_vcpu *vcpu)
return 1;
}
-int kvm_fast_pio_in(struct kvm_vcpu *vcpu, int size, unsigned short port)
+static int kvm_fast_pio_in(struct kvm_vcpu *vcpu, int size,
+ unsigned short port)
{
unsigned long val;
int ret;
@@ -6068,7 +6200,21 @@ int kvm_fast_pio_in(struct kvm_vcpu *vcpu, int size, unsigned short port)
return 0;
}
-EXPORT_SYMBOL_GPL(kvm_fast_pio_in);
+
+int kvm_fast_pio(struct kvm_vcpu *vcpu, int size, unsigned short port, int in)
+{
+ int ret = kvm_skip_emulated_instruction(vcpu);
+
+ /*
+ * TODO: we might be squashing a KVM_GUESTDBG_SINGLESTEP-triggered
+ * KVM_EXIT_DEBUG here.
+ */
+ if (in)
+ return kvm_fast_pio_in(vcpu, size, port) && ret;
+ else
+ return kvm_fast_pio_out(vcpu, size, port) && ret;
+}
+EXPORT_SYMBOL_GPL(kvm_fast_pio);
static int kvmclock_cpu_down_prep(unsigned int cpu)
{
@@ -6246,7 +6392,8 @@ static void kvm_timer_init(void)
kvmclock_cpu_online, kvmclock_cpu_down_prep);
}
-static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu);
+DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu);
+EXPORT_PER_CPU_SYMBOL_GPL(current_vcpu);
int kvm_is_in_guest(void)
{
@@ -6279,18 +6426,6 @@ static struct perf_guest_info_callbacks kvm_guest_cbs = {
.get_guest_ip = kvm_get_guest_ip,
};
-void kvm_before_handle_nmi(struct kvm_vcpu *vcpu)
-{
- __this_cpu_write(current_vcpu, vcpu);
-}
-EXPORT_SYMBOL_GPL(kvm_before_handle_nmi);
-
-void kvm_after_handle_nmi(struct kvm_vcpu *vcpu)
-{
- __this_cpu_write(current_vcpu, NULL);
-}
-EXPORT_SYMBOL_GPL(kvm_after_handle_nmi);
-
static void kvm_set_mmio_spte_mask(void)
{
u64 mask;
@@ -6644,27 +6779,36 @@ static int inject_pending_event(struct kvm_vcpu *vcpu, bool req_int_win)
int r;
/* try to reinject previous events if any */
- if (vcpu->arch.exception.injected) {
- kvm_x86_ops->queue_exception(vcpu);
- return 0;
- }
+ if (vcpu->arch.exception.injected)
+ kvm_x86_ops->queue_exception(vcpu);
/*
- * Exceptions must be injected immediately, or the exception
- * frame will have the address of the NMI or interrupt handler.
+ * Do not inject an NMI or interrupt if there is a pending
+ * exception. Exceptions and interrupts are recognized at
+ * instruction boundaries, i.e. the start of an instruction.
+ * Trap-like exceptions, e.g. #DB, have higher priority than
+ * NMIs and interrupts, i.e. traps are recognized before an
+ * NMI/interrupt that's pending on the same instruction.
+ * Fault-like exceptions, e.g. #GP and #PF, are the lowest
+ * priority, but are only generated (pended) during instruction
+ * execution, i.e. a pending fault-like exception means the
+ * fault occurred on the *previous* instruction and must be
+ * serviced prior to recognizing any new events in order to
+ * fully complete the previous instruction.
*/
- if (!vcpu->arch.exception.pending) {
- if (vcpu->arch.nmi_injected) {
+ else if (!vcpu->arch.exception.pending) {
+ if (vcpu->arch.nmi_injected)
kvm_x86_ops->set_nmi(vcpu);
- return 0;
- }
-
- if (vcpu->arch.interrupt.pending) {
+ else if (vcpu->arch.interrupt.injected)
kvm_x86_ops->set_irq(vcpu);
- return 0;
- }
}
+ /*
+ * Call check_nested_events() even if we reinjected a previous event
+ * in order for caller to determine if it should require immediate-exit
+ * from L2 to L1 due to pending L1 events which require exit
+ * from L2 to L1.
+ */
if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) {
r = kvm_x86_ops->check_nested_events(vcpu, req_int_win);
if (r != 0)
@@ -6677,6 +6821,7 @@ static int inject_pending_event(struct kvm_vcpu *vcpu, bool req_int_win)
vcpu->arch.exception.has_error_code,
vcpu->arch.exception.error_code);
+ WARN_ON_ONCE(vcpu->arch.exception.injected);
vcpu->arch.exception.pending = false;
vcpu->arch.exception.injected = true;
@@ -6691,7 +6836,14 @@ static int inject_pending_event(struct kvm_vcpu *vcpu, bool req_int_win)
}
kvm_x86_ops->queue_exception(vcpu);
- } else if (vcpu->arch.smi_pending && !is_smm(vcpu) && kvm_x86_ops->smi_allowed(vcpu)) {
+ }
+
+ /* Don't consider new event if we re-injected an event */
+ if (kvm_event_needs_reinjection(vcpu))
+ return 0;
+
+ if (vcpu->arch.smi_pending && !is_smm(vcpu) &&
+ kvm_x86_ops->smi_allowed(vcpu)) {
vcpu->arch.smi_pending = false;
++vcpu->arch.smi_count;
enter_smm(vcpu);
@@ -6985,8 +7137,6 @@ void kvm_make_scan_ioapic_request(struct kvm *kvm)
static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu)
{
- u64 eoi_exit_bitmap[4];
-
if (!kvm_apic_hw_enabled(vcpu->arch.apic))
return;
@@ -6999,6 +7149,20 @@ static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu)
kvm_x86_ops->sync_pir_to_irr(vcpu);
kvm_ioapic_scan_entry(vcpu, vcpu->arch.ioapic_handled_vectors);
}
+
+ if (is_guest_mode(vcpu))
+ vcpu->arch.load_eoi_exitmap_pending = true;
+ else
+ kvm_make_request(KVM_REQ_LOAD_EOI_EXITMAP, vcpu);
+}
+
+static void vcpu_load_eoi_exitmap(struct kvm_vcpu *vcpu)
+{
+ u64 eoi_exit_bitmap[4];
+
+ if (!kvm_apic_hw_enabled(vcpu->arch.apic))
+ return;
+
bitmap_or((ulong *)eoi_exit_bitmap, vcpu->arch.ioapic_handled_vectors,
vcpu_to_synic(vcpu)->vec_bitmap, 256);
kvm_x86_ops->load_eoi_exitmap(vcpu, eoi_exit_bitmap);
@@ -7113,6 +7277,8 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
}
if (kvm_check_request(KVM_REQ_SCAN_IOAPIC, vcpu))
vcpu_scan_ioapic(vcpu);
+ if (kvm_check_request(KVM_REQ_LOAD_EOI_EXITMAP, vcpu))
+ vcpu_load_eoi_exitmap(vcpu);
if (kvm_check_request(KVM_REQ_APIC_PAGE_RELOAD, vcpu))
kvm_vcpu_reload_apic_access_page(vcpu);
if (kvm_check_request(KVM_REQ_HV_CRASH, vcpu)) {
@@ -7291,7 +7457,9 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
kvm_put_guest_xcr0(vcpu);
+ kvm_before_interrupt(vcpu);
kvm_x86_ops->handle_external_intr(vcpu);
+ kvm_after_interrupt(vcpu);
++vcpu->stat.exits;
@@ -7500,7 +7668,6 @@ static int complete_emulated_mmio(struct kvm_vcpu *vcpu)
return 0;
}
-
int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
int r;
@@ -7526,6 +7693,17 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
goto out;
}
+ if (vcpu->run->kvm_valid_regs & ~KVM_SYNC_X86_VALID_FIELDS) {
+ r = -EINVAL;
+ goto out;
+ }
+
+ if (vcpu->run->kvm_dirty_regs) {
+ r = sync_regs(vcpu);
+ if (r != 0)
+ goto out;
+ }
+
/* re-sync apic's tpr */
if (!lapic_in_kernel(vcpu)) {
if (kvm_set_cr8(vcpu, kvm_run->cr8) != 0) {
@@ -7550,6 +7728,8 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
out:
kvm_put_guest_fpu(vcpu);
+ if (vcpu->run->kvm_valid_regs)
+ store_regs(vcpu);
post_kvm_run_save(vcpu);
kvm_sigset_deactivate(vcpu);
@@ -7557,10 +7737,8 @@ out:
return r;
}
-int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
+static void __get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
{
- vcpu_load(vcpu);
-
if (vcpu->arch.emulate_regs_need_sync_to_vcpu) {
/*
* We are here if userspace calls get_regs() in the middle of
@@ -7593,15 +7771,18 @@ int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
regs->rip = kvm_rip_read(vcpu);
regs->rflags = kvm_get_rflags(vcpu);
+}
+int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
+{
+ vcpu_load(vcpu);
+ __get_regs(vcpu, regs);
vcpu_put(vcpu);
return 0;
}
-int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
+static void __set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
{
- vcpu_load(vcpu);
-
vcpu->arch.emulate_regs_need_sync_from_vcpu = true;
vcpu->arch.emulate_regs_need_sync_to_vcpu = false;
@@ -7630,7 +7811,12 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
vcpu->arch.exception.pending = false;
kvm_make_request(KVM_REQ_EVENT, vcpu);
+}
+int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
+{
+ vcpu_load(vcpu);
+ __set_regs(vcpu, regs);
vcpu_put(vcpu);
return 0;
}
@@ -7645,13 +7831,10 @@ void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
}
EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
-int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
- struct kvm_sregs *sregs)
+static void __get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
{
struct desc_ptr dt;
- vcpu_load(vcpu);
-
kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
@@ -7679,10 +7862,16 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap);
- if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft)
+ if (vcpu->arch.interrupt.injected && !vcpu->arch.interrupt.soft)
set_bit(vcpu->arch.interrupt.nr,
(unsigned long *)sregs->interrupt_bitmap);
+}
+int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
+ struct kvm_sregs *sregs)
+{
+ vcpu_load(vcpu);
+ __get_sregs(vcpu, sregs);
vcpu_put(vcpu);
return 0;
}
@@ -7754,7 +7943,7 @@ int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index,
}
EXPORT_SYMBOL_GPL(kvm_task_switch);
-int kvm_valid_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
+static int kvm_valid_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
{
if ((sregs->efer & EFER_LME) && (sregs->cr0 & X86_CR0_PG)) {
/*
@@ -7777,8 +7966,7 @@ int kvm_valid_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
return 0;
}
-int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
- struct kvm_sregs *sregs)
+static int __set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
{
struct msr_data apic_base_msr;
int mmu_reset_needed = 0;
@@ -7786,8 +7974,6 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
struct desc_ptr dt;
int ret = -EINVAL;
- vcpu_load(vcpu);
-
if (!guest_cpuid_has(vcpu, X86_FEATURE_XSAVE) &&
(sregs->cr4 & X86_CR4_OSXSAVE))
goto out;
@@ -7866,6 +8052,16 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
ret = 0;
out:
+ return ret;
+}
+
+int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
+ struct kvm_sregs *sregs)
+{
+ int ret;
+
+ vcpu_load(vcpu);
+ ret = __set_sregs(vcpu, sregs);
vcpu_put(vcpu);
return ret;
}
@@ -7992,6 +8188,45 @@ int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
return 0;
}
+static void store_regs(struct kvm_vcpu *vcpu)
+{
+ BUILD_BUG_ON(sizeof(struct kvm_sync_regs) > SYNC_REGS_SIZE_BYTES);
+
+ if (vcpu->run->kvm_valid_regs & KVM_SYNC_X86_REGS)
+ __get_regs(vcpu, &vcpu->run->s.regs.regs);
+
+ if (vcpu->run->kvm_valid_regs & KVM_SYNC_X86_SREGS)
+ __get_sregs(vcpu, &vcpu->run->s.regs.sregs);
+
+ if (vcpu->run->kvm_valid_regs & KVM_SYNC_X86_EVENTS)
+ kvm_vcpu_ioctl_x86_get_vcpu_events(
+ vcpu, &vcpu->run->s.regs.events);
+}
+
+static int sync_regs(struct kvm_vcpu *vcpu)
+{
+ if (vcpu->run->kvm_dirty_regs & ~KVM_SYNC_X86_VALID_FIELDS)
+ return -EINVAL;
+
+ if (vcpu->run->kvm_dirty_regs & KVM_SYNC_X86_REGS) {
+ __set_regs(vcpu, &vcpu->run->s.regs.regs);
+ vcpu->run->kvm_dirty_regs &= ~KVM_SYNC_X86_REGS;
+ }
+ if (vcpu->run->kvm_dirty_regs & KVM_SYNC_X86_SREGS) {
+ if (__set_sregs(vcpu, &vcpu->run->s.regs.sregs))
+ return -EINVAL;
+ vcpu->run->kvm_dirty_regs &= ~KVM_SYNC_X86_SREGS;
+ }
+ if (vcpu->run->kvm_dirty_regs & KVM_SYNC_X86_EVENTS) {
+ if (kvm_vcpu_ioctl_x86_set_vcpu_events(
+ vcpu, &vcpu->run->s.regs.events))
+ return -EINVAL;
+ vcpu->run->kvm_dirty_regs &= ~KVM_SYNC_X86_EVENTS;
+ }
+
+ return 0;
+}
+
static void fx_init(struct kvm_vcpu *vcpu)
{
fpstate_init(&vcpu->arch.guest_fpu.state);
@@ -8447,7 +8682,6 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
raw_spin_lock_init(&kvm->arch.tsc_write_lock);
mutex_init(&kvm->arch.apic_map_lock);
- mutex_init(&kvm->arch.hyperv.hv_lock);
spin_lock_init(&kvm->arch.pvclock_gtod_sync_lock);
kvm->arch.kvmclock_offset = -ktime_get_boot_ns();
@@ -8456,6 +8690,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
INIT_DELAYED_WORK(&kvm->arch.kvmclock_update_work, kvmclock_update_fn);
INIT_DELAYED_WORK(&kvm->arch.kvmclock_sync_work, kvmclock_sync_fn);
+ kvm_hv_init_vm(kvm);
kvm_page_track_init(kvm);
kvm_mmu_init_vm(kvm);
@@ -8586,6 +8821,7 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
kvfree(rcu_dereference_check(kvm->arch.apic_map, 1));
kvm_mmu_uninit_vm(kvm);
kvm_page_track_cleanup(kvm);
+ kvm_hv_destroy_vm(kvm);
}
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-24 14:10:45 +0000