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-rw-r--r--arch/x86/include/asm/kvm_host.h3
-rw-r--r--arch/x86/kvm/lapic.c2
-rw-r--r--arch/x86/kvm/svm/sev.c22
-rw-r--r--arch/x86/kvm/svm/svm.c10
-rw-r--r--arch/x86/kvm/svm/svm.h2
-rw-r--r--arch/x86/kvm/vmx/vmx.c2
-rw-r--r--arch/x86/kvm/x86.c26
-rw-r--r--include/uapi/linux/kvm.h2
8 files changed, 63 insertions, 6 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index afed3da3b3a0..3d6616f6f6ef 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1299,6 +1299,8 @@ struct kvm_x86_ops {
void (*migrate_timers)(struct kvm_vcpu *vcpu);
void (*msr_filter_changed)(struct kvm_vcpu *vcpu);
int (*complete_emulated_msr)(struct kvm_vcpu *vcpu, int err);
+
+ void (*vcpu_deliver_sipi_vector)(struct kvm_vcpu *vcpu, u8 vector);
};
struct kvm_x86_nested_ops {
@@ -1480,6 +1482,7 @@ int kvm_fast_pio(struct kvm_vcpu *vcpu, int size, unsigned short port, int in);
int kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
int kvm_emulate_halt(struct kvm_vcpu *vcpu);
int kvm_vcpu_halt(struct kvm_vcpu *vcpu);
+int kvm_emulate_ap_reset_hold(struct kvm_vcpu *vcpu);
int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu);
void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 78823227c592..43cceadd073e 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -2898,7 +2898,7 @@ void kvm_apic_accept_events(struct kvm_vcpu *vcpu)
/* evaluate pending_events before reading the vector */
smp_rmb();
sipi_vector = apic->sipi_vector;
- kvm_vcpu_deliver_sipi_vector(vcpu, sipi_vector);
+ kvm_x86_ops.vcpu_deliver_sipi_vector(vcpu, sipi_vector);
vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
}
}
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 563ced07b0b8..c8ffdbc81709 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -1563,6 +1563,7 @@ static int sev_es_validate_vmgexit(struct vcpu_svm *svm)
goto vmgexit_err;
break;
case SVM_VMGEXIT_NMI_COMPLETE:
+ case SVM_VMGEXIT_AP_HLT_LOOP:
case SVM_VMGEXIT_AP_JUMP_TABLE:
case SVM_VMGEXIT_UNSUPPORTED_EVENT:
break;
@@ -1888,6 +1889,9 @@ int sev_handle_vmgexit(struct vcpu_svm *svm)
case SVM_VMGEXIT_NMI_COMPLETE:
ret = svm_invoke_exit_handler(svm, SVM_EXIT_IRET);
break;
+ case SVM_VMGEXIT_AP_HLT_LOOP:
+ ret = kvm_emulate_ap_reset_hold(&svm->vcpu);
+ break;
case SVM_VMGEXIT_AP_JUMP_TABLE: {
struct kvm_sev_info *sev = &to_kvm_svm(svm->vcpu.kvm)->sev_info;
@@ -2040,3 +2044,21 @@ void sev_es_vcpu_put(struct vcpu_svm *svm)
wrmsrl(host_save_user_msrs[i].index, svm->host_user_msrs[i]);
}
}
+
+void sev_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ /* First SIPI: Use the values as initially set by the VMM */
+ if (!svm->received_first_sipi) {
+ svm->received_first_sipi = true;
+ return;
+ }
+
+ /*
+ * Subsequent SIPI: Return from an AP Reset Hold VMGEXIT, where
+ * the guest will set the CS and RIP. Set SW_EXIT_INFO_2 to a
+ * non-zero value.
+ */
+ ghcb_set_sw_exit_info_2(svm->ghcb, 1);
+}
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 6824d611dc5d..7ef171790d02 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -4382,6 +4382,14 @@ static bool svm_apic_init_signal_blocked(struct kvm_vcpu *vcpu)
(vmcb_is_intercept(&svm->vmcb->control, INTERCEPT_INIT));
}
+static void svm_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector)
+{
+ if (!sev_es_guest(vcpu->kvm))
+ return kvm_vcpu_deliver_sipi_vector(vcpu, vector);
+
+ sev_vcpu_deliver_sipi_vector(vcpu, vector);
+}
+
static void svm_vm_destroy(struct kvm *kvm)
{
avic_vm_destroy(kvm);
@@ -4524,6 +4532,8 @@ static struct kvm_x86_ops svm_x86_ops __initdata = {
.msr_filter_changed = svm_msr_filter_changed,
.complete_emulated_msr = svm_complete_emulated_msr,
+
+ .vcpu_deliver_sipi_vector = svm_vcpu_deliver_sipi_vector,
};
static struct kvm_x86_init_ops svm_init_ops __initdata = {
diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h
index 5431e6335e2e..0fe874ae5498 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -185,6 +185,7 @@ struct vcpu_svm {
struct vmcb_save_area *vmsa;
struct ghcb *ghcb;
struct kvm_host_map ghcb_map;
+ bool received_first_sipi;
/* SEV-ES scratch area support */
void *ghcb_sa;
@@ -591,6 +592,7 @@ void sev_es_init_vmcb(struct vcpu_svm *svm);
void sev_es_create_vcpu(struct vcpu_svm *svm);
void sev_es_vcpu_load(struct vcpu_svm *svm, int cpu);
void sev_es_vcpu_put(struct vcpu_svm *svm);
+void sev_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector);
/* vmenter.S */
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 75c9c6a0a3a4..2af05d3b0590 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7707,6 +7707,8 @@ static struct kvm_x86_ops vmx_x86_ops __initdata = {
.msr_filter_changed = vmx_msr_filter_changed,
.complete_emulated_msr = kvm_complete_insn_gp,
.cpu_dirty_log_size = vmx_cpu_dirty_log_size,
+
+ .vcpu_deliver_sipi_vector = kvm_vcpu_deliver_sipi_vector,
};
static __init int hardware_setup(void)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index f6e7b25c40e2..0287840b93e0 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7976,17 +7976,22 @@ void kvm_arch_exit(void)
kmem_cache_destroy(x86_fpu_cache);
}
-int kvm_vcpu_halt(struct kvm_vcpu *vcpu)
+int __kvm_vcpu_halt(struct kvm_vcpu *vcpu, int state, int reason)
{
++vcpu->stat.halt_exits;
if (lapic_in_kernel(vcpu)) {
- vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
+ vcpu->arch.mp_state = state;
return 1;
} else {
- vcpu->run->exit_reason = KVM_EXIT_HLT;
+ vcpu->run->exit_reason = reason;
return 0;
}
}
+
+int kvm_vcpu_halt(struct kvm_vcpu *vcpu)
+{
+ return __kvm_vcpu_halt(vcpu, KVM_MP_STATE_HALTED, KVM_EXIT_HLT);
+}
EXPORT_SYMBOL_GPL(kvm_vcpu_halt);
int kvm_emulate_halt(struct kvm_vcpu *vcpu)
@@ -8000,6 +8005,14 @@ int kvm_emulate_halt(struct kvm_vcpu *vcpu)
}
EXPORT_SYMBOL_GPL(kvm_emulate_halt);
+int kvm_emulate_ap_reset_hold(struct kvm_vcpu *vcpu)
+{
+ int ret = kvm_skip_emulated_instruction(vcpu);
+
+ return __kvm_vcpu_halt(vcpu, KVM_MP_STATE_AP_RESET_HOLD, KVM_EXIT_AP_RESET_HOLD) && ret;
+}
+EXPORT_SYMBOL_GPL(kvm_emulate_ap_reset_hold);
+
#ifdef CONFIG_X86_64
static int kvm_pv_clock_pairing(struct kvm_vcpu *vcpu, gpa_t paddr,
unsigned long clock_type)
@@ -9096,6 +9109,7 @@ static inline int vcpu_block(struct kvm *kvm, struct kvm_vcpu *vcpu)
kvm_apic_accept_events(vcpu);
switch(vcpu->arch.mp_state) {
case KVM_MP_STATE_HALTED:
+ case KVM_MP_STATE_AP_RESET_HOLD:
vcpu->arch.pv.pv_unhalted = false;
vcpu->arch.mp_state =
KVM_MP_STATE_RUNNABLE;
@@ -9522,8 +9536,9 @@ int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
kvm_load_guest_fpu(vcpu);
kvm_apic_accept_events(vcpu);
- if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED &&
- vcpu->arch.pv.pv_unhalted)
+ if ((vcpu->arch.mp_state == KVM_MP_STATE_HALTED ||
+ vcpu->arch.mp_state == KVM_MP_STATE_AP_RESET_HOLD) &&
+ vcpu->arch.pv.pv_unhalted)
mp_state->mp_state = KVM_MP_STATE_RUNNABLE;
else
mp_state->mp_state = vcpu->arch.mp_state;
@@ -10154,6 +10169,7 @@ void kvm_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector)
kvm_set_segment(vcpu, &cs, VCPU_SREG_CS);
kvm_rip_write(vcpu, 0);
}
+EXPORT_SYMBOL_GPL(kvm_vcpu_deliver_sipi_vector);
int kvm_arch_hardware_enable(void)
{
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 886802b8ffba..374c67875cdb 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -251,6 +251,7 @@ struct kvm_hyperv_exit {
#define KVM_EXIT_X86_RDMSR 29
#define KVM_EXIT_X86_WRMSR 30
#define KVM_EXIT_DIRTY_RING_FULL 31
+#define KVM_EXIT_AP_RESET_HOLD 32
/* For KVM_EXIT_INTERNAL_ERROR */
/* Emulate instruction failed. */
@@ -573,6 +574,7 @@ struct kvm_vapic_addr {
#define KVM_MP_STATE_CHECK_STOP 6
#define KVM_MP_STATE_OPERATING 7
#define KVM_MP_STATE_LOAD 8
+#define KVM_MP_STATE_AP_RESET_HOLD 9
struct kvm_mp_state {
__u32 mp_state;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.