From: Mihai Donțu <mdontu@xxxxxxxxxxxxxxx>
This is needed for the KVMI_EVENT_MSR event, which is used notify the
introspection tool about any change made to a MSR of interest.
Signed-off-by: Mihai Donțu <mdontu@xxxxxxxxxxxxxxx>
Co-developed-by: Nicușor Cîțu <ncitu@xxxxxxxxxxxxxxx>
Signed-off-by: Nicușor Cîțu <ncitu@xxxxxxxxxxxxxxx>
Signed-off-by: Adalbert Lazăr <alazar@xxxxxxxxxxxxxxx>
---
arch/x86/include/asm/kvm_host.h | 2 ++
arch/x86/kvm/svm/svm.c | 11 +++++++++++
arch/x86/kvm/vmx/vmx.c | 10 ++++++++++
3 files changed, 23 insertions(+)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index a3230ab377db..f04a01dac423 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1110,6 +1110,8 @@ struct kvm_x86_ops {
void (*update_bp_intercept)(struct kvm_vcpu *vcpu);
int (*get_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr);
int (*set_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr);
+ void (*control_msr_intercept)(struct kvm_vcpu *vcpu, unsigned int msr,
+ int type, bool enable);
bool (*msr_write_intercepted)(struct kvm_vcpu *vcpu, u32 msr);
u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
void (*get_segment)(struct kvm_vcpu *vcpu,
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index dfa1a6e74bf7..9c8e77193f98 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -612,6 +612,16 @@ static void set_msr_interception(struct kvm_vcpu *vcpu,
msrpm[offset] = tmp;
}
+static void svm_control_msr_intercept(struct kvm_vcpu *vcpu, unsigned int msr,
+ int type, bool enable)
+{
+ const struct vcpu_svm *svm = to_svm(vcpu);
+ u32 *msrpm = is_guest_mode(vcpu) ? svm->nested.msrpm :
+ svm->msrpm;
+
+ set_msr_interception(vcpu, msrpm, msr, type, !enable);
+}
+
static void svm_vcpu_init_msrpm(u32 *msrpm)
{
int i;
@@ -4096,6 +4106,7 @@ static struct kvm_x86_ops svm_x86_ops __initdata = {
.get_msr_feature = svm_get_msr_feature,
.get_msr = svm_get_msr,
.set_msr = svm_set_msr,
+ .control_msr_intercept = svm_control_msr_intercept,
.msr_write_intercepted = msr_write_intercepted,
.get_segment_base = svm_get_segment_base,
.get_segment = svm_get_segment,
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index ecf7fb21b812..fed661eb65a7 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -3822,6 +3822,15 @@ static __always_inline void vmx_set_intercept_for_msr(struct kvm_vcpu *vcpu,
vmx_disable_intercept_for_msr(vcpu, msr_bitmap, msr, type);
}
+static void vmx_control_msr_intercept(struct kvm_vcpu *vcpu, unsigned int msr,
+ int type, bool enable)
+{
+ struct vcpu_vmx *vmx = to_vmx(vcpu);
+ unsigned long *msr_bitmap = vmx->vmcs01.msr_bitmap;
+
+ vmx_set_intercept_for_msr(vcpu, msr_bitmap, msr, type, enable);
+}
+
static u8 vmx_msr_bitmap_mode(struct kvm_vcpu *vcpu)
{
u8 mode = 0;
@@ -7916,6 +7925,7 @@ static struct kvm_x86_ops vmx_x86_ops __initdata = {
.get_msr_feature = vmx_get_msr_feature,
.get_msr = vmx_get_msr,
.set_msr = vmx_set_msr,
+ .control_msr_intercept = vmx_control_msr_intercept,
.msr_write_intercepted = msr_write_intercepted,
.get_segment_base = vmx_get_segment_base,
.get_segment = vmx_get_segment,
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