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);
+
#define KVM_NR_SHARED_MSRS 16
struct kvm_shared_msrs_global {
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_APIC_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,
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:
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;
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:
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,
r = KVM_X2APIC_API_VALID_FLAGS;
break;
default:
- r = 0;
break;
}
return r;
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,
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;
}
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;
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,
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)
emulation_type))
return EMULATE_DONE;
- return handle_emulation_failure(vcpu);
+ return handle_emulation_failure(vcpu, emulation_type);
}
if (ctxt->have_exception) {
}
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,
vcpu->arch.pio.count = 0;
return ret;
}
-EXPORT_SYMBOL_GPL(kvm_fast_pio_out);
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;
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)
{
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)
{
.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;
static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu)
{
- u64 eoi_exit_bitmap[4];
-
if (!kvm_apic_hw_enabled(vcpu->arch.apic))
return;
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);
}
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)) {
kvm_put_guest_xcr0(vcpu);
+ kvm_before_interrupt(vcpu);
kvm_x86_ops->handle_external_intr(vcpu);
+ kvm_after_interrupt(vcpu);
++vcpu->stat.exits;
projects / linux.git / blobdiff