[Xen-changelog] [xen master] hvm/svm: Enable MSR events

[patchbot@xxxxxxx]

commit 6e9fc4d628b613291e3bb5e2458b49ebc7cbd3af
Author:     Alexandru Isaila <aisaila@xxxxxxxxxxxxxxx>
AuthorDate: Thu Feb 15 12:22:25 2018 +0200
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Thu Feb 15 14:01:24 2018 +0000

    hvm/svm: Enable MSR events
    
    At this moment there is no function to enable msr interception on svm.
    
    This patch implements this function and moves the mov to msr monitor
    event
    form the Intel arch side to the common capabilities.
    
    Signed-off-by: Alexandru Isaila <aisaila@xxxxxxxxxxxxxxx>
    Acked-by: Tamas K Lengyel <tamas@xxxxxxxxxxxxx>
    Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/hvm/svm/svm.c    | 9 +++++++++
 xen/include/asm-x86/monitor.h | 4 ++--
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/hvm/svm/svm.c b/xen/arch/x86/hvm/svm/svm.c
index 98a83d3..ad90205 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;
@@ -2457,6 +2465,7 @@ 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 b1902f2..9a8f9d9 100644
--- a/xen/include/asm-x86/monitor.h
+++ b/xen/include/asm-x86/monitor.h
@@ -78,12 +78,12 @@ static inline uint32_t arch_monitor_get_capabilities(struct 
domain *d)
         return capabilities;
 
     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 ( cpu_has_vmx )
     {
         capabilities |= ((1U << XEN_DOMCTL_MONITOR_EVENT_WRITE_CTRLREG) |
-                         (1U << XEN_DOMCTL_MONITOR_EVENT_MOV_TO_MSR) |
                          (1U << XEN_DOMCTL_MONITOR_EVENT_DEBUG_EXCEPTION) |
                          (1U << XEN_DOMCTL_MONITOR_EVENT_CPUID) |
                          (1U << XEN_DOMCTL_MONITOR_EVENT_INTERRUPT) |
--
generated by git-patchbot for /home/xen/git/xen.git#master

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