[Xen-devel] [PATCH v1 3/4] hvm/svm: Enable MSR events

[Alexandru Isaila <aisaila@xxxxxxxxxxxxxxx>]

This commit enables MSR events for svm.

Signed-off-by: Alexandru Isaila <aisaila@xxxxxxxxxxxxxxx>
---
 xen/arch/x86/hvm/svm/svm.c    | 9 +++++++++
 xen/include/asm-x86/monitor.h | 3 ++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/xen/arch/x86/hvm/svm/svm.c b/xen/arch/x86/hvm/svm/svm.c
index 14a5f60..dc3ad0b 100644
--- a/xen/arch/x86/hvm/svm/svm.c
+++ b/xen/arch/x86/hvm/svm/svm.c
@@ -163,6 +163,14 @@ void svm_intercept_msr(struct vcpu *v, uint32_t msr, int 
flags)
         __clear_bit(msr * 2 + 1, msr_bit);
 }
 
+static void svm_enable_msr_interception(struct domain *d, uint32_t msr)
+{
+    struct vcpu *v;
+
+    for_each_vcpu ( d, v )
+        svm_intercept_msr(v, msr, MSR_INTERCEPT_WRITE);
+}
+
 static void svm_save_dr(struct vcpu *v)
 {
     struct vmcb_struct *vmcb = v->arch.hvm_svm.vmcb;
@@ -2464,6 +2472,7 @@ static struct hvm_function_table __initdata 
svm_function_table = {
     .fpu_dirty_intercept  = svm_fpu_dirty_intercept,
     .msr_read_intercept   = svm_msr_read_intercept,
     .msr_write_intercept  = svm_msr_write_intercept,
+    .enable_msr_interception = svm_enable_msr_interception,
     .set_rdtsc_exiting    = svm_set_rdtsc_exiting,
     .set_descriptor_access_exiting = svm_set_descriptor_access_exiting,
     .get_insn_bytes       = svm_get_insn_bytes,
diff --git a/xen/include/asm-x86/monitor.h b/xen/include/asm-x86/monitor.h
index 68a210a..4d8887e 100644
--- a/xen/include/asm-x86/monitor.h
+++ b/xen/include/asm-x86/monitor.h
@@ -95,7 +95,8 @@ static inline uint32_t arch_monitor_get_capabilities(struct 
domain *d)
     else if ( cpu_has_svm )
     {
         capabilities = (1U << XEN_DOMCTL_MONITOR_EVENT_GUEST_REQUEST) |
-                       (1U << XEN_DOMCTL_MONITOR_EVENT_SOFTWARE_BREAKPOINT);
+                       (1U << XEN_DOMCTL_MONITOR_EVENT_SOFTWARE_BREAKPOINT) |
+                       (1U << XEN_DOMCTL_MONITOR_EVENT_MOV_TO_MSR);
     }
 
     if ( hvm_funcs.set_descriptor_access_exiting )
-- 
2.7.4


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