[Xen-changelog] [xen master] vpmu intel: pass through cpuid bits when BTS is enabled

[patchbot@xxxxxxx]

commit 647597124fe28ee88f3baf499f5afdfed8de341f
Author:     Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxx>
AuthorDate: Tue Mar 12 15:37:45 2013 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Mar 12 15:37:45 2013 +0100

    vpmu intel: pass through cpuid bits when BTS is enabled
    
    This patch passes the orginal cpuid bits for X86_FEATURE_DTES64 (64-bit
    DS Area) and X86_FEATURE_DSCPL (CPL Qualified Debug Store) to the guest
    when the BTS feature is switched on. I forgot this when I did this BTS
    emulation.
    
    Signed-off-by: Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxx>
---
 xen/arch/x86/hvm/vmx/vpmu_core2.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/xen/arch/x86/hvm/vmx/vpmu_core2.c 
b/xen/arch/x86/hvm/vmx/vpmu_core2.c
index 2af8966..afad35b 100644
--- a/xen/arch/x86/hvm/vmx/vpmu_core2.c
+++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c
@@ -607,6 +607,10 @@ static void core2_vpmu_do_cpuid(unsigned int input,
         {
             /* Switch on the 'Debug Store' feature in CPUID.EAX[1]:EDX[21] */
             *edx |= cpufeat_mask(X86_FEATURE_DS);
+            if ( cpu_has(&current_cpu_data, X86_FEATURE_DTES64) )
+                *ecx |= cpufeat_mask(X86_FEATURE_DTES64);
+            if ( cpu_has(&current_cpu_data, X86_FEATURE_DSCPL) )
+                *ecx |= cpufeat_mask(X86_FEATURE_DSCPL);
         }
     }
 }
--
generated by git-patchbot for /home/xen/git/xen.git#master

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