Similar to NMI, there may be ISA specific reasons why an SMI cannot be
injected into the guest. This commit adds a new smi_allowed callback to
be implemented in following commits.
Signed-off-by: Ladi Prosek <lprosek@xxxxxxxxxx>
---
arch/x86/include/asm/kvm_host.h | 1 +
arch/x86/kvm/svm.c | 6 ++++++
arch/x86/kvm/vmx.c | 6 ++++++
arch/x86/kvm/x86.c | 2 +-
4 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 769de6d2e684..1c9d6b90f50c 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1062,6 +1062,7 @@ struct kvm_x86_ops {
void (*setup_mce)(struct kvm_vcpu *vcpu);
+ int (*smi_allowed)(struct kvm_vcpu *vcpu);
int (*prep_enter_smm)(struct kvm_vcpu *vcpu, char *smstate);
int (*post_leave_smm)(struct kvm_vcpu *vcpu, u64 smbase,
bool *reload_state);
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index d9b3e1bea644..e7c6c7fb3e19 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -5393,6 +5393,11 @@ static void svm_setup_mce(struct kvm_vcpu *vcpu)
vcpu->arch.mcg_cap &= 0x1ff;
}
+static int svm_smi_allowed(struct kvm_vcpu *vcpu)
+{
+ return 1;
+}
+
static int svm_prep_enter_smm(struct kvm_vcpu *vcpu, char *smstate)
{
/* TODO: Implement */
@@ -5517,6 +5522,7 @@ static struct kvm_x86_ops svm_x86_ops __ro_after_init = {
.update_pi_irte = svm_update_pi_irte,
.setup_mce = svm_setup_mce,
+ .smi_allowed = svm_smi_allowed,
.prep_enter_smm = svm_prep_enter_smm,
.post_leave_smm = svm_post_leave_smm,
};
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 15478f413392..bde45f0c27cc 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -11941,6 +11941,11 @@ static void vmx_setup_mce(struct kvm_vcpu *vcpu)
~FEATURE_CONTROL_LMCE;
}
+static int vmx_smi_allowed(struct kvm_vcpu *vcpu)
+{
+ return 1;
+}
+
static int vmx_prep_enter_smm(struct kvm_vcpu *vcpu, char *smstate)
{
/* TODO: Implement */
@@ -12080,6 +12085,7 @@ static struct kvm_x86_ops vmx_x86_ops __ro_after_init = {
.setup_mce = vmx_setup_mce,
+ .smi_allowed = vmx_smi_allowed,
.prep_enter_smm = vmx_prep_enter_smm,
.post_leave_smm = vmx_post_leave_smm,
};
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index e9aef1d858a8..588ef3864ebd 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6433,7 +6433,7 @@ 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)) {
+ } else if (vcpu->arch.smi_pending && !is_smm(vcpu) && kvm_x86_ops->smi_allowed(vcpu)) {
vcpu->arch.smi_pending = false;
enter_smm(vcpu);
} else if (vcpu->arch.nmi_pending && kvm_x86_ops->nmi_allowed(vcpu)) {
--
2.13.5
