File 54c0e398-x86-correctly-check-for-sub-leaf-zero-of-leaf-7-in-pv_cpuid.patch of Package xen.481

# Commit ae1edef1ae33f3bcff2580116ae2b7c9ffef42f2
# Date 2015-01-22 12:48:40 +0100
# Author Jan Beulich <jbeulich@suse.com>
# Committer Jan Beulich <jbeulich@suse.com>
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@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>

--- a/xen/arch/x86/traps.c
+++ b/xen/arch/x86/traps.c
@@ -787,7 +787,7 @@ void pv_cpuid(struct cpu_user_regs *regs
         __clear_bit(X86_FEATURE_PSE36, &d);
     }
 
-    switch ( (uint32_t)regs->eax )
+    switch ( regs->_eax )
     {
     case 0x00000001:
         /* Modify Feature Information. */
@@ -822,7 +822,7 @@ 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) |