[Xen-devel] [PATCH v13 for-xen-4.5 03/21] x86/VPMU: Set MSR bitmaps only for HVM/PVH guests

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

In preparation for making VPMU code shared with PV make sure that we we update
MSR bitmaps only for HVM/PVH guests

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Acked-by: Kevin Tian <kevin.tian@xxxxxxxxx>
Reviewed-by: Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxx>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
---
 xen/arch/x86/hvm/svm/vpmu.c       | 21 +++++++++++++--------
 xen/arch/x86/hvm/vmx/vpmu_core2.c |  8 +++++---
 2 files changed, 18 insertions(+), 11 deletions(-)

diff --git a/xen/arch/x86/hvm/svm/vpmu.c b/xen/arch/x86/hvm/svm/vpmu.c
index 8e07a98..f49af97 100644
--- a/xen/arch/x86/hvm/svm/vpmu.c
+++ b/xen/arch/x86/hvm/svm/vpmu.c
@@ -244,7 +244,8 @@ static int amd_vpmu_save(struct vcpu *v)
 
     context_save(v);
 
-    if ( !vpmu_is_set(vpmu, VPMU_RUNNING) && ctx->msr_bitmap_set )
+    if ( !vpmu_is_set(vpmu, VPMU_RUNNING) &&
+         has_hvm_container_vcpu(v) && ctx->msr_bitmap_set )
         amd_vpmu_unset_msr_bitmap(v);
 
     return 1;
@@ -287,8 +288,9 @@ static int amd_vpmu_do_wrmsr(unsigned int msr, uint64_t 
msr_content,
     ASSERT(!supported);
 
     /* For all counters, enable guest only mode for HVM guest */
-    if ( (get_pmu_reg_type(msr) == MSR_TYPE_CTRL) &&
-        !(is_guest_mode(msr_content)) )
+    if ( has_hvm_container_vcpu(v) &&
+         (get_pmu_reg_type(msr) == MSR_TYPE_CTRL) &&
+         !is_guest_mode(msr_content) )
     {
         set_guest_mode(msr_content);
     }
@@ -303,8 +305,9 @@ static int amd_vpmu_do_wrmsr(unsigned int msr, uint64_t 
msr_content,
         apic_write(APIC_LVTPC, PMU_APIC_VECTOR);
         vpmu->hw_lapic_lvtpc = PMU_APIC_VECTOR;
 
-        if ( !((struct amd_vpmu_context *)vpmu->context)->msr_bitmap_set )
-            amd_vpmu_set_msr_bitmap(v);
+        if ( has_hvm_container_vcpu(v) &&
+             !((struct amd_vpmu_context *)vpmu->context)->msr_bitmap_set )
+             amd_vpmu_set_msr_bitmap(v);
     }
 
     /* stop saving & restore if guest stops first counter */
@@ -314,8 +317,9 @@ static int amd_vpmu_do_wrmsr(unsigned int msr, uint64_t 
msr_content,
         apic_write(APIC_LVTPC, PMU_APIC_VECTOR | APIC_LVT_MASKED);
         vpmu->hw_lapic_lvtpc = PMU_APIC_VECTOR | APIC_LVT_MASKED;
         vpmu_reset(vpmu, VPMU_RUNNING);
-        if ( ((struct amd_vpmu_context *)vpmu->context)->msr_bitmap_set )
-            amd_vpmu_unset_msr_bitmap(v);
+        if ( has_hvm_container_vcpu(v) &&
+             ((struct amd_vpmu_context *)vpmu->context)->msr_bitmap_set )
+             amd_vpmu_unset_msr_bitmap(v);
         release_pmu_ownship(PMU_OWNER_HVM);
     }
 
@@ -406,7 +410,8 @@ static void amd_vpmu_destroy(struct vcpu *v)
     if ( !vpmu_is_set(vpmu, VPMU_CONTEXT_ALLOCATED) )
         return;
 
-    if ( ((struct amd_vpmu_context *)vpmu->context)->msr_bitmap_set )
+    if ( has_hvm_container_vcpu(v) &&
+         ((struct amd_vpmu_context *)vpmu->context)->msr_bitmap_set )
         amd_vpmu_unset_msr_bitmap(v);
 
     xfree(vpmu->context);
diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c 
b/xen/arch/x86/hvm/vmx/vpmu_core2.c
index 68b6272..54e96b6 100644
--- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
+++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
@@ -335,7 +335,8 @@ static int core2_vpmu_save(struct vcpu *v)
     __core2_vpmu_save(v);
 
     /* Unset PMU MSR bitmap to trap lazy load. */
-    if ( !vpmu_is_set(vpmu, VPMU_RUNNING) && cpu_has_vmx_msr_bitmap )
+    if ( !vpmu_is_set(vpmu, VPMU_RUNNING) &&
+         has_hvm_container_vcpu(v) && cpu_has_vmx_msr_bitmap )
         core2_vpmu_unset_msr_bitmap(v->arch.hvm_vmx.msr_bitmap);
 
     return 1;
@@ -448,7 +449,8 @@ static int core2_vpmu_msr_common_check(u32 msr_index, int 
*type, int *index)
     {
         __core2_vpmu_load(current);
         vpmu_set(vpmu, VPMU_CONTEXT_LOADED);
-        if ( cpu_has_vmx_msr_bitmap )
+        if ( has_hvm_container_vcpu(current) &&
+             cpu_has_vmx_msr_bitmap )
             core2_vpmu_set_msr_bitmap(current->arch.hvm_vmx.msr_bitmap);
     }
     return 1;
@@ -822,7 +824,7 @@ static void core2_vpmu_destroy(struct vcpu *v)
         return;
     xfree(core2_vpmu_cxt->pmu_enable);
     xfree(vpmu->context);
-    if ( cpu_has_vmx_msr_bitmap )
+    if ( has_hvm_container_vcpu(v) && cpu_has_vmx_msr_bitmap )
         core2_vpmu_unset_msr_bitmap(v->arch.hvm_vmx.msr_bitmap);
     release_pmu_ownship(PMU_OWNER_HVM);
     vpmu_reset(vpmu, VPMU_CONTEXT_ALLOCATED);
-- 
1.8.1.4


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