From 7d596f5ad70969d8171e1eb5b7a39d0dc6c11dc2 Mon Sep 17 00:00:00 2001
From: Brendan Gregg <bgregg@netflix.com>
Date: Wed, 25 Nov 2015 11:12:55 +0100
Subject: [PATCH] x86/VPMU: return correct fixed PMC count

Fixes a register typo.

Signed-off-by: Brendan Gregg <bgregg@netflix.com>
Reviewed-by: Dietmar Hahn <dietmar.hahn@ts.fujitsu.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
---
 xen/arch/x86/cpu/vpmu_intel.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/xen/arch/x86/cpu/vpmu_intel.c b/xen/arch/x86/cpu/vpmu_intel.c
index 12f80aeb70..d5ea7fe2a3 100644
--- a/xen/arch/x86/cpu/vpmu_intel.c
+++ b/xen/arch/x86/cpu/vpmu_intel.c
@@ -166,10 +166,9 @@ static int core2_get_arch_pmc_count(void)
  */
 static int core2_get_fixed_pmc_count(void)
 {
-    u32 eax;
+    u32 edx = cpuid_edx(0xa);
 
-    eax = cpuid_eax(0xa);
-    return MASK_EXTR(eax, PMU_FIXED_NR_MASK);
+    return MASK_EXTR(edx, PMU_FIXED_NR_MASK);
 }
 
 /* edx bits 5-12: Bit width of fixed-function performance counters  */
-- 
2.30.2