[Xen-changelog] [xen master] x86: correctly check for sub-leaf zero of leaf 7 in pv_cpuid()

[patchbot@xxxxxxx]

commit ae1edef1ae33f3bcff2580116ae2b7c9ffef42f2
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Thu Jan 22 12:48:40 2015 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Jan 22 12:48:40 2015 +0100

    x86: correctly check for sub-leaf zero of leaf 7 in pv_cpuid()
    
    Only the low 32 bits are relevant.
    
    For consistency also change a cast on regs->eax to regs->_eax.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/traps.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/traps.c b/xen/arch/x86/traps.c
index bd04dad..a8d7bb6 100644
--- a/xen/arch/x86/traps.c
+++ b/xen/arch/x86/traps.c
@@ -881,7 +881,7 @@ void pv_cpuid(struct cpu_user_regs *regs)
         }
     }
 
-    switch ( (uint32_t)regs->eax )
+    switch ( regs->_eax )
     {
     case 0x00000001:
         /* Modify Feature Information. */
@@ -916,7 +916,7 @@ void pv_cpuid(struct cpu_user_regs *regs)
         break;
 
     case 0x00000007:
-        if ( regs->ecx == 0 )
+        if ( regs->_ecx == 0 )
             b &= (cpufeat_mask(X86_FEATURE_BMI1) |
                   cpufeat_mask(X86_FEATURE_HLE)  |
                   cpufeat_mask(X86_FEATURE_AVX2) |
--
generated by git-patchbot for /home/xen/git/xen.git#master

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