[PATCH v2 08/10] x86/vtx: Remove opencoded MSR_ARCH_CAPS check

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

MSR_ARCH_CAPS data is now included in featureset information.

Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
---
CC: Jan Beulich <JBeulich@xxxxxxxx>
CC: Roger Pau Monné <roger.pau@xxxxxxxxxx>
CC: Wei Liu <wl@xxxxxxx>
CC: Jun Nakajima <jun.nakajima@xxxxxxxxx>
CC: Kevin Tian <kevin.tian@xxxxxxxxx>
---
 xen/arch/x86/hvm/vmx/vmx.c            | 8 ++------
 xen/arch/x86/include/asm/cpufeature.h | 3 +++
 2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index 096c69251d58..9dc16d0cc6b9 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -2849,8 +2849,6 @@ static void __init ler_to_fixup_check(void);
  */
 static bool __init has_if_pschange_mc(void)
 {
-    uint64_t caps = 0;
-
     /*
      * If we are virtualised, there is nothing we can do.  Our EPT tables are
      * shadowed by our hypervisor, and not walked by hardware.
@@ -2858,10 +2856,8 @@ static bool __init has_if_pschange_mc(void)
     if ( cpu_has_hypervisor )
         return false;
 
-    if ( cpu_has_arch_caps )
-        rdmsrl(MSR_ARCH_CAPABILITIES, caps);
-
-    if ( caps & ARCH_CAPS_IF_PSCHANGE_MC_NO )
+    /* Hardware reports itself as fixed. */
+    if ( cpu_has_if_pschange_mc_no )
         return false;
 
     /*
diff --git a/xen/arch/x86/include/asm/cpufeature.h 
b/xen/arch/x86/include/asm/cpufeature.h
index d0ead8e7a51e..e3154ec5800d 100644
--- a/xen/arch/x86/include/asm/cpufeature.h
+++ b/xen/arch/x86/include/asm/cpufeature.h
@@ -182,6 +182,9 @@ static inline bool boot_cpu_has(unsigned int feat)
 #define cpu_has_avx_vnni_int8   boot_cpu_has(X86_FEATURE_AVX_VNNI_INT8)
 #define cpu_has_avx_ne_convert  boot_cpu_has(X86_FEATURE_AVX_NE_CONVERT)
 
+/* MSR_ARCH_CAPS */
+#define cpu_has_if_pschange_mc_no boot_cpu_has(X86_FEATURE_IF_PSCHANGE_MC_NO)
+
 /* Synthesized. */
 #define cpu_has_arch_perfmon    boot_cpu_has(X86_FEATURE_ARCH_PERFMON)
 #define cpu_has_cpuid_faulting  boot_cpu_has(X86_FEATURE_CPUID_FAULTING)
-- 
2.30.2