1 files changed, 10 insertions, 2 deletions

diff --git a/arch/i386/kernel/cpu/intel.c b/arch/i386/kernel/cpu/intel.c
index 94a95aa5227e..56fe26584957 100644
--- a/arch/i386/kernel/cpu/intel.c
+++ b/arch/i386/kernel/cpu/intel.c
@@ -107,7 +107,7 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
          * Note that the workaround only should be initialized once...
          */
         c->f00f_bug = 0;
-        if ( c->x86 == 5 ) {
+        if (!paravirt_enabled() && c->x86 == 5) {
                 static int f00f_workaround_enabled = 0;
 
                 c->f00f_bug = 1;
@@ -195,8 +195,16 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
         if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
                 (c->x86 == 0x6 && c->x86_model >= 0x0e))
                 set_bit(X86_FEATURE_CONSTANT_TSC, c->x86_capability);
-}
 
+        if (cpu_has_ds) {
+                unsigned int l1;
+                rdmsr(MSR_IA32_MISC_ENABLE, l1, l2);
+                if (!(l1 & (1<<11)))
+                        set_bit(X86_FEATURE_BTS, c->x86_capability);
+                if (!(l1 & (1<<12)))
+                        set_bit(X86_FEATURE_PEBS, c->x86_capability);
+        }
+}
 
 static unsigned int __cpuinit intel_size_cache(struct cpuinfo_x86 * c, unsigned int size)
 {