From: Mihai Donțu <mdo...@bitdefender.com>
This is needed for the KVMI_VCPU_EVENT_MSR event, which is used notify
the introspection tool about any change made to a MSR of interest.
Signed-off-by: Mihai Donțu <mdo...@bitdefender.com>
Co-developed-by: Nicușor Cîțu <nicu.c...@icloud.com>
Signed-off-by: Nicușor Cîțu <nicu.c...@icloud.com>
Signed-off-by: Adalbert Lazăr <ala...@bitdefender.com>
---
arch/x86/include/asm/kvm-x86-ops.h | 1 +
arch/x86/include/asm/kvm_host.h | 2 ++
arch/x86/kvm/svm/svm.c | 11 +++++++++++
arch/x86/kvm/vmx/vmx.c | 7 +++++++
4 files changed, 21 insertions(+)
diff --git a/arch/x86/include/asm/kvm-x86-ops.h
b/arch/x86/include/asm/kvm-x86-ops.h
index 90e913408c6e..4228b775a48e 100644
--- a/arch/x86/include/asm/kvm-x86-ops.h
+++ b/arch/x86/include/asm/kvm-x86-ops.h
@@ -128,6 +128,7 @@ KVM_X86_OP(desc_ctrl_supported)
KVM_X86_OP(control_desc_intercept)
KVM_X86_OP(desc_intercepted)
KVM_X86_OP(msr_write_intercepted)
+KVM_X86_OP(control_msr_intercept)
#undef KVM_X86_OP
#undef KVM_X86_OP_NULL
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 79b2d8abff36..29f4e8b619e1 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1335,6 +1335,8 @@ struct kvm_x86_ops {
void (*update_exception_bitmap)(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 97f7406cf7d6..b7ef0671863e 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -712,6 +712,16 @@ void set_msr_interception(struct kvm_vcpu *vcpu, u32
*msrpm, u32 msr,
set_msr_interception_bitmap(vcpu, msrpm, msr, type, value);
}
+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);
+}
+
u32 *svm_vcpu_alloc_msrpm(void)
{
unsigned int order = get_order(MSRPM_SIZE);
@@ -4718,6 +4728,7 @@ 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 b036aed96912..a140d69b1bd3 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -3859,6 +3859,12 @@ void vmx_enable_intercept_for_msr(struct kvm_vcpu *vcpu,
u32 msr, int type)
vmx_set_msr_bitmap_write(msr_bitmap, msr);
}
+static void vmx_control_msr_intercept(struct kvm_vcpu *vcpu, unsigned int msr,
+ int type, bool enable)
+{
+ vmx_set_intercept_for_msr(vcpu, msr, type, enable);
+}
+
static void vmx_reset_x2apic_msrs(struct kvm_vcpu *vcpu, u8 mode)
{
unsigned long *msr_bitmap = to_vmx(vcpu)->vmcs01.msr_bitmap;
@@ -7637,6 +7643,7 @@ 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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