diff --git a/Documentation/virt/kvm/kvmi.rst b/Documentation/virt/kvm/kvmi.rst
index 649a679a485b..3466db72e5e8 100644
--- a/Documentation/virt/kvm/kvmi.rst
+++ b/Documentation/virt/kvm/kvmi.rst
@@ -542,6 +542,7 @@ the following events::
 	KVMI_VCPU_EVENT_CR
 	KVMI_VCPU_EVENT_DESCRIPTOR
 	KVMI_VCPU_EVENT_HYPERCALL
+	KVMI_VCPU_EVENT_MSR
 	KVMI_VCPU_EVENT_XSETBV
 
 When an event is enabled, the introspection tool is notified and
@@ -922,6 +923,48 @@ Returns the guest memory type for a specific guest physical address (``gpa``).
 * -KVM_EINVAL - the padding is not zero
 * -KVM_EAGAIN - the selected vCPU can't be introspected yet
 
+22. KVMI_VCPU_CONTROL_MSR
+-------------------------
+
+:Architectures: x86
+:Versions: >= 1
+:Parameters:
+
+::
+
+	struct kvmi_vcpu_hdr;
+	struct kvmi_vcpu_control_msr {
+		__u8 enable;
+		__u8 padding1;
+		__u16 padding2;
+		__u32 msr;
+	};
+
+:Returns:
+
+::
+
+	struct kvmi_error_code
+
+Enables/disables introspection for a specific MSR and must be used
+in addition to *KVMI_VCPU_CONTROL_EVENTS* with the *KVMI_VCPU_EVENT_MSR*
+ID set.
+
+Currently, only MSRs within the following two ranges are supported. Trying
+to control events for any other register will fail with -KVM_EINVAL::
+
+	0          ... 0x00001fff
+	0xc0000000 ... 0xc0001fff
+
+:Errors:
+
+* -KVM_EINVAL - the selected vCPU is invalid
+* -KVM_EINVAL - the specified MSR is invalid
+* -KVM_EINVAL - the padding is not zero
+* -KVM_EAGAIN - the selected vCPU can't be introspected yet
+* -KVM_EPERM  - the interception of the selected MSR is disallowed
+                from userspace (KVM_X86_SET_MSR_FILTER)
+
 Events
 ======
 
@@ -1260,3 +1303,39 @@ introspection tool.
 	KVMI_DESC_TR
 
 ``write`` is 1 if the descriptor was written, 0 otherwise.
+
+9. KVMI_VCPU_EVENT_MSR
+----------------------
+
+:Architectures: x86
+:Versions: >= 1
+:Actions: CONTINUE, CRASH
+:Parameters:
+
+::
+
+	struct kvmi_vcpu_event;
+	struct kvmi_vcpu_event_msr {
+		__u32 msr;
+		__u32 padding;
+		__u64 old_value;
+		__u64 new_value;
+	};
+
+:Returns:
+
+::
+
+	struct kvmi_vcpu_hdr;
+	struct kvmi_vcpu_event_reply;
+	struct kvmi_vcpu_event_msr_reply {
+		__u64 new_val;
+	};
+
+This event is sent when a model specific register is going to be changed
+and the introspection has been enabled for this event and for this specific
+register (see **KVMI_VCPU_CONTROL_EVENTS**).
+
+``kvmi_vcpu_event`` (with the vCPU state), the MSR number (``msr``),
+the old value (``old_value``) and the new value (``new_value``) are sent
+to the introspection tool. The *CONTINUE* action will set the ``new_val``.
diff --git a/arch/x86/include/asm/kvmi_host.h b/arch/x86/include/asm/kvmi_host.h
index a872277eba67..5a4fc5b80907 100644
--- a/arch/x86/include/asm/kvmi_host.h
+++ b/arch/x86/include/asm/kvmi_host.h
@@ -4,7 +4,10 @@
 
 #include <asm/kvmi.h>
 
+struct msr_data;
+
 #define KVMI_NUM_CR 5
+#define KVMI_NUM_MSR 0x2000
 
 struct kvmi_monitor_interception {
 	bool kvmi_intercepted;
@@ -18,6 +21,12 @@ struct kvmi_interception {
 	struct kvmi_monitor_interception breakpoint;
 	struct kvmi_monitor_interception cr3w;
 	struct kvmi_monitor_interception descriptor;
+	struct {
+		struct {
+			DECLARE_BITMAP(low, KVMI_NUM_MSR);
+			DECLARE_BITMAP(high, KVMI_NUM_MSR);
+		} kvmi_mask;
+	} msrw;
 };
 
 struct kvm_vcpu_arch_introspection {
@@ -51,6 +60,7 @@ void kvmi_xsetbv_event(struct kvm_vcpu *vcpu, u8 xcr,
 		       u64 old_value, u64 new_value);
 bool kvmi_monitor_desc_intercept(struct kvm_vcpu *vcpu, bool enable);
 bool kvmi_descriptor_event(struct kvm_vcpu *vcpu, u8 descriptor, bool write);
+bool kvmi_msr_event(struct kvm_vcpu *vcpu, struct msr_data *msr);
 
 #else /* CONFIG_KVM_INTROSPECTION */
 
@@ -70,6 +80,8 @@ static inline bool kvmi_monitor_desc_intercept(struct kvm_vcpu *vcpu,
 					       bool enable) { return false; }
 static inline bool kvmi_descriptor_event(struct kvm_vcpu *vcpu, u8 descriptor,
 					 bool write) { return true; }
+static inline bool kvmi_msr_event(struct kvm_vcpu *vcpu, struct msr_data *msr)
+				{ return true; }
 
 #endif /* CONFIG_KVM_INTROSPECTION */
 
diff --git a/arch/x86/include/uapi/asm/kvmi.h b/arch/x86/include/uapi/asm/kvmi.h
index db01c56a95ff..705e90c2137a 100644
--- a/arch/x86/include/uapi/asm/kvmi.h
+++ b/arch/x86/include/uapi/asm/kvmi.h
@@ -141,4 +141,22 @@ struct kvmi_vcpu_event_descriptor {
 	__u8 padding[6];
 };
 
+struct kvmi_vcpu_control_msr {
+	__u8 enable;
+	__u8 padding1;
+	__u16 padding2;
+	__u32 msr;
+};
+
+struct kvmi_vcpu_event_msr {
+	__u32 msr;
+	__u32 padding;
+	__u64 old_value;
+	__u64 new_value;
+};
+
+struct kvmi_vcpu_event_msr_reply {
+	__u64 new_val;
+};
+
 #endif /* _UAPI_ASM_X86_KVMI_H */
diff --git a/arch/x86/kvm/kvmi.c b/arch/x86/kvm/kvmi.c
index 4106ae63a115..ce29e01ba7a6 100644
--- a/arch/x86/kvm/kvmi.c
+++ b/arch/x86/kvm/kvmi.c
@@ -16,6 +16,7 @@ void kvmi_arch_init_vcpu_events_mask(unsigned long *supported)
 	set_bit(KVMI_VCPU_EVENT_CR, supported);
 	set_bit(KVMI_VCPU_EVENT_HYPERCALL, supported);
 	set_bit(KVMI_VCPU_EVENT_DESCRIPTOR, supported);
+	set_bit(KVMI_VCPU_EVENT_MSR, supported);
 	set_bit(KVMI_VCPU_EVENT_TRAP, supported);
 	set_bit(KVMI_VCPU_EVENT_XSETBV, supported);
 }
@@ -344,6 +345,77 @@ static void kvmi_arch_disable_desc_intercept(struct kvm_vcpu *vcpu)
 	vcpu->arch.kvmi->descriptor.kvm_intercepted = false;
 }
 
+static unsigned long *msr_mask(struct kvm_vcpu *vcpu, unsigned int *msr)
+{
+	switch (*msr) {
+	case 0 ... 0x1fff:
+		return vcpu->arch.kvmi->msrw.kvmi_mask.low;
+	case 0xc0000000 ... 0xc0001fff:
+		*msr &= 0x1fff;
+		return vcpu->arch.kvmi->msrw.kvmi_mask.high;
+	}
+
+	return NULL;
+}
+
+static bool test_msr_mask(struct kvm_vcpu *vcpu, unsigned int msr)
+{
+	unsigned long *mask = msr_mask(vcpu, &msr);
+
+	if (!mask)
+		return false;
+
+	return !!test_bit(msr, mask);
+}
+
+static bool msr_control(struct kvm_vcpu *vcpu, unsigned int msr, bool enable)
+{
+	unsigned long *mask = msr_mask(vcpu, &msr);
+
+	if (!mask)
+		return false;
+
+	if (enable)
+		set_bit(msr, mask);
+	else
+		clear_bit(msr, mask);
+
+	return true;
+}
+
+static unsigned int msr_mask_to_base(struct kvm_vcpu *vcpu, unsigned long *mask)
+{
+	if (mask == vcpu->arch.kvmi->msrw.kvmi_mask.high)
+		return 0xc0000000;
+
+	return 0;
+}
+
+void kvmi_control_msrw_intercept(struct kvm_vcpu *vcpu, u32 msr, bool enable)
+{
+	kvm_x86_ops.control_msr_intercept(vcpu, msr, MSR_TYPE_W, enable);
+	msr_control(vcpu, msr, enable);
+}
+
+static void kvmi_arch_disable_msr_intercept(struct kvm_vcpu *vcpu,
+					    unsigned long *mask)
+{
+	unsigned int msr_base = msr_mask_to_base(vcpu, mask);
+	int offset = -1;
+
+	for (;;) {
+		offset = find_next_bit(mask, KVMI_NUM_MSR, offset + 1);
+
+		if (offset >= KVMI_NUM_MSR)
+			break;
+
+		kvm_x86_ops.control_msr_intercept(vcpu, msr_base + offset,
+						   MSR_TYPE_W, false);
+	}
+
+	bitmap_zero(mask, KVMI_NUM_MSR);
+}
+
 int kvmi_arch_cmd_control_intercept(struct kvm_vcpu *vcpu,
 				    unsigned int event_id, bool enable)
 {
@@ -385,9 +457,13 @@ void kvmi_arch_breakpoint_event(struct kvm_vcpu *vcpu, u64 gva, u8 insn_len)
 
 static void kvmi_arch_restore_interception(struct kvm_vcpu *vcpu)
 {
+	struct kvmi_interception *arch_vcpui = vcpu->arch.kvmi;
+
 	kvmi_arch_disable_bp_intercept(vcpu);
 	kvmi_arch_disable_cr3w_intercept(vcpu);
 	kvmi_arch_disable_desc_intercept(vcpu);
+	kvmi_arch_disable_msr_intercept(vcpu, arch_vcpui->msrw.kvmi_mask.low);
+	kvmi_arch_disable_msr_intercept(vcpu, arch_vcpui->msrw.kvmi_mask.high);
 }
 
 bool kvmi_arch_clean_up_interception(struct kvm_vcpu *vcpu)
@@ -700,3 +776,52 @@ bool kvmi_descriptor_event(struct kvm_vcpu *vcpu, u8 descriptor, bool write)
 	return ret;
 }
 EXPORT_SYMBOL(kvmi_descriptor_event);
+
+static bool __kvmi_msr_event(struct kvm_vcpu *vcpu, struct msr_data *msr)
+{
+	struct msr_data old_msr = {
+		.host_initiated = true,
+		.index = msr->index,
+	};
+	u64 reply_value;
+	u32 action;
+	bool ret;
+
+	if (!test_msr_mask(vcpu, msr->index))
+		return true;
+	if (kvm_x86_ops.get_msr(vcpu, &old_msr))
+		return true;
+	if (old_msr.data == msr->data)
+		return true;
+
+	action = kvmi_msg_send_vcpu_msr(vcpu, msr->index, old_msr.data,
+					msr->data, &reply_value);
+	switch (action) {
+	case KVMI_EVENT_ACTION_CONTINUE:
+		msr->data = reply_value;
+		ret = true;
+		break;
+	default:
+		kvmi_handle_common_event_actions(vcpu, action);
+		ret = false;
+	}
+
+	return ret;
+}
+
+bool kvmi_msr_event(struct kvm_vcpu *vcpu, struct msr_data *msr)
+{
+	struct kvm_introspection *kvmi;
+	bool ret = true;
+
+	kvmi = kvmi_get(vcpu->kvm);
+	if (!kvmi)
+		return true;
+
+	if (is_vcpu_event_enabled(vcpu, KVMI_VCPU_EVENT_MSR))
+		ret = __kvmi_msr_event(vcpu, msr);
+
+	kvmi_put(vcpu->kvm);
+
+	return ret;
+}
diff --git a/arch/x86/kvm/kvmi.h b/arch/x86/kvm/kvmi.h
index 92422e2e57cf..6483edbb80c5 100644
--- a/arch/x86/kvm/kvmi.h
+++ b/arch/x86/kvm/kvmi.h
@@ -17,5 +17,8 @@ u32 kvmi_msg_send_vcpu_trap(struct kvm_vcpu *vcpu);
 u32 kvmi_msg_send_vcpu_xsetbv(struct kvm_vcpu *vcpu, u8 xcr,
 			      u64 old_value, u64 new_value);
 u32 kvmi_msg_send_vcpu_descriptor(struct kvm_vcpu *vcpu, u8 desc, bool write);
+void kvmi_control_msrw_intercept(struct kvm_vcpu *vcpu, u32 msr, bool enable);
+u32 kvmi_msg_send_vcpu_msr(struct kvm_vcpu *vcpu, u32 msr, u64 old_value,
+			   u64 new_value, u64 *ret_value);
 
 #endif
diff --git a/arch/x86/kvm/kvmi_msg.c b/arch/x86/kvm/kvmi_msg.c
index 7a851b4d5983..c961c5367a13 100644
--- a/arch/x86/kvm/kvmi_msg.c
+++ b/arch/x86/kvm/kvmi_msg.c
@@ -249,8 +249,36 @@ static int handle_vcpu_get_mtrr_type(const struct kvmi_vcpu_msg_job *job,
 	return kvmi_msg_vcpu_reply(job, msg, 0, &rpl, sizeof(rpl));
 }
 
+static bool is_valid_msr(unsigned int msr)
+{
+	return msr <= 0x1fff || (msr >= 0xc0000000 && msr <= 0xc0001fff);
+}
+
+static int handle_vcpu_control_msr(const struct kvmi_vcpu_msg_job *job,
+				   const struct kvmi_msg_hdr *msg,
+				   const void *_req)
+{
+	const struct kvmi_vcpu_control_msr *req = _req;
+	int ec = 0;
+
+	if (req->padding1 || req->padding2 || req->enable > 1)
+		ec = -KVM_EINVAL;
+	else if (!is_valid_msr(req->msr))
+		ec = -KVM_EINVAL;
+	else if (req->enable &&
+		 !kvm_msr_allowed(job->vcpu, req->msr,
+				  KVM_MSR_FILTER_WRITE))
+		ec = -KVM_EPERM;
+	else
+		kvmi_control_msrw_intercept(job->vcpu, req->msr,
+					    req->enable == 1);
+
+	return kvmi_msg_vcpu_reply(job, msg, ec, NULL, 0);
+}
+
 static kvmi_vcpu_msg_job_fct const msg_vcpu[] = {
 	[KVMI_VCPU_CONTROL_CR]       = handle_vcpu_control_cr,
+	[KVMI_VCPU_CONTROL_MSR]      = handle_vcpu_control_msr,
 	[KVMI_VCPU_GET_CPUID]        = handle_vcpu_get_cpuid,
 	[KVMI_VCPU_GET_INFO]         = handle_vcpu_get_info,
 	[KVMI_VCPU_GET_MTRR_TYPE]    = handle_vcpu_get_mtrr_type,
@@ -350,3 +378,27 @@ u32 kvmi_msg_send_vcpu_descriptor(struct kvm_vcpu *vcpu, u8 desc, bool write)
 	return action;
 
 }
+
+u32 kvmi_msg_send_vcpu_msr(struct kvm_vcpu *vcpu, u32 msr, u64 old_value,
+			   u64 new_value, u64 *ret_value)
+{
+	struct kvmi_vcpu_event_msr e;
+	struct kvmi_vcpu_event_msr_reply r;
+	int err, action;
+
+	memset(&e, 0, sizeof(e));
+	e.msr = msr;
+	e.old_value = old_value;
+	e.new_value = new_value;
+
+	err = kvmi_send_vcpu_event(vcpu, KVMI_VCPU_EVENT_MSR, &e, sizeof(e),
+				   &r, sizeof(r), &action);
+	if (err) {
+		action = KVMI_EVENT_ACTION_CONTINUE;
+		*ret_value = new_value;
+	} else {
+		*ret_value = r.new_val;
+	}
+
+	return action;
+}
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index d62294fee424..0ffa2e73284e 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1588,6 +1588,9 @@ static int __kvm_set_msr(struct kvm_vcpu *vcpu, u32 index, u64 data,
 	msr.index = index;
 	msr.host_initiated = host_initiated;
 
+	if (!host_initiated && !kvmi_msr_event(vcpu, &msr))
+		return 1;
+
 	return kvm_x86_ops.set_msr(vcpu, &msr);
 }
 
diff --git a/include/uapi/linux/kvmi.h b/include/uapi/linux/kvmi.h
index 09f78c0efc4f..c8e7f4516379 100644
--- a/include/uapi/linux/kvmi.h
+++ b/include/uapi/linux/kvmi.h
@@ -48,6 +48,7 @@ enum {
 	KVMI_VCPU_GET_XSAVE        = KVMI_VCPU_MESSAGE_ID(9),
 	KVMI_VCPU_SET_XSAVE        = KVMI_VCPU_MESSAGE_ID(10),
 	KVMI_VCPU_GET_MTRR_TYPE    = KVMI_VCPU_MESSAGE_ID(11),
+	KVMI_VCPU_CONTROL_MSR      = KVMI_VCPU_MESSAGE_ID(12),
 
 	KVMI_NEXT_VCPU_MESSAGE
 };
@@ -69,6 +70,7 @@ enum {
 	KVMI_VCPU_EVENT_TRAP       = KVMI_VCPU_EVENT_ID(4),
 	KVMI_VCPU_EVENT_XSETBV     = KVMI_VCPU_EVENT_ID(5),
 	KVMI_VCPU_EVENT_DESCRIPTOR = KVMI_VCPU_EVENT_ID(6),
+	KVMI_VCPU_EVENT_MSR        = KVMI_VCPU_EVENT_ID(7),
 
 	KVMI_NEXT_VCPU_EVENT
 };
diff --git a/tools/testing/selftests/kvm/x86_64/kvmi_test.c b/tools/testing/selftests/kvm/x86_64/kvmi_test.c
index d26df3a9ffff..2e07b22bc8c0 100644
--- a/tools/testing/selftests/kvm/x86_64/kvmi_test.c
+++ b/tools/testing/selftests/kvm/x86_64/kvmi_test.c
@@ -60,6 +60,7 @@ enum {
 	GUEST_TEST_CR,
 	GUEST_TEST_DESCRIPTOR,
 	GUEST_TEST_HYPERCALL,
+	GUEST_TEST_MSR,
 	GUEST_TEST_XSETBV,
 };
 
@@ -104,6 +105,15 @@ static void guest_hypercall_test(void)
 	asm volatile(".byte 0x0f,0x01,0xc1");
 }
 
+static void guest_msr_test(void)
+{
+	uint64_t msr;
+
+	msr = rdmsr(MSR_MISC_FEATURES_ENABLES);
+	msr |= 1; /* MSR_MISC_FEATURES_ENABLES_CPUID_FAULT */
+	wrmsr(MSR_MISC_FEATURES_ENABLES, msr);
+}
+
 /* from fpu/internal.h */
 static u64 xgetbv(u32 index)
 {
@@ -161,6 +171,9 @@ static void guest_code(void)
 		case GUEST_TEST_HYPERCALL:
 			guest_hypercall_test();
 			break;
+		case GUEST_TEST_MSR:
+			guest_msr_test();
+			break;
 		case GUEST_TEST_XSETBV:
 			guest_xsetbv_test();
 			break;
@@ -1579,6 +1592,103 @@ static void test_event_descriptor(struct kvm_vm *vm)
 	disable_vcpu_event(vm, event_id);
 }
 
+static void cmd_control_msr(struct kvm_vm *vm, __u32 msr, __u8 enable,
+			    int expected_err)
+{
+	struct {
+		struct kvmi_msg_hdr hdr;
+		struct kvmi_vcpu_hdr vcpu_hdr;
+		struct kvmi_vcpu_control_msr cmd;
+	} req = {};
+
+	req.cmd.msr = msr;
+	req.cmd.enable = enable;
+
+	test_vcpu0_command(vm, KVMI_VCPU_CONTROL_MSR, &req.hdr, sizeof(req),
+			     NULL, 0, expected_err);
+}
+
+static void enable_msr_events(struct kvm_vm *vm, __u32 msr)
+{
+	enable_vcpu_event(vm, KVMI_VCPU_EVENT_MSR);
+	cmd_control_msr(vm, msr, 1, 0);
+}
+
+static void disable_msr_events(struct kvm_vm *vm, __u32 msr)
+{
+	cmd_control_msr(vm, msr, 0, 0);
+	disable_vcpu_event(vm, KVMI_VCPU_EVENT_MSR);
+}
+
+static void handle_msr_event(struct kvm_vm *vm, __u16 event_id, __u32 msr,
+			     __u64 *old_value)
+{
+	struct kvmi_msg_hdr hdr;
+	struct {
+		struct vcpu_event vcpu_ev;
+		struct kvmi_vcpu_event_msr msr;
+	} ev;
+	struct {
+		struct vcpu_reply common;
+		struct kvmi_vcpu_event_msr_reply msr;
+	} rpl = {};
+
+	receive_vcpu_event(&hdr, &ev.vcpu_ev, sizeof(ev), event_id);
+
+	pr_debug("MSR 0x%x, old 0x%llx, new 0x%llx\n",
+		 ev.msr.msr, ev.msr.old_value, ev.msr.new_value);
+
+	TEST_ASSERT(ev.msr.msr == msr,
+		"Unexpected MSR event, received MSR 0x%x, expected MSR 0x%x",
+		ev.msr.msr, msr);
+
+	*old_value = rpl.msr.new_val = ev.msr.old_value;
+
+	reply_to_event(&hdr, &ev.vcpu_ev, KVMI_EVENT_ACTION_CONTINUE,
+			&rpl.common, sizeof(rpl));
+}
+
+static void test_invalid_control_msr(struct kvm_vm *vm, __u32 msr)
+{
+	__u8 enable = 1, enable_inval = 2;
+	int expected_err = -KVM_EINVAL;
+	__u32 msr_inval = -1;
+
+	cmd_control_msr(vm, msr, enable_inval, expected_err);
+	cmd_control_msr(vm, msr_inval, enable, expected_err);
+}
+
+static void test_cmd_vcpu_control_msr(struct kvm_vm *vm)
+{
+	struct vcpu_worker_data data = {
+		.vm = vm,
+		.vcpu_id = VCPU_ID,
+		.test_id = GUEST_TEST_MSR,
+	};
+	__u16 event_id = KVMI_VCPU_EVENT_MSR;
+	__u32 msr = MSR_MISC_FEATURES_ENABLES;
+	pthread_t vcpu_thread;
+	uint64_t msr_data;
+	__u64 old_value;
+
+	enable_msr_events(vm, msr);
+
+	vcpu_thread = start_vcpu_worker(&data);
+
+	handle_msr_event(vm, event_id, msr, &old_value);
+
+	wait_vcpu_worker(vcpu_thread);
+
+	disable_msr_events(vm, msr);
+
+	msr_data = vcpu_get_msr(vm, VCPU_ID, msr);
+	TEST_ASSERT(msr_data == old_value,
+		"Failed to block MSR 0x%x update, value 0x%lx, expected 0x%llx",
+		msr, msr_data, old_value);
+
+	test_invalid_control_msr(vm, msr);
+}
+
 static void test_introspection(struct kvm_vm *vm)
 {
 	srandom(time(0));
@@ -1610,6 +1720,7 @@ static void test_introspection(struct kvm_vm *vm)
 	test_cmd_vcpu_xsave(vm);
 	test_cmd_vcpu_get_mtrr_type(vm);
 	test_event_descriptor(vm);
+	test_cmd_vcpu_control_msr(vm);
 
 	unhook_introspection(vm);
 }
