From: Andrew Cooper <andrew.cooper3@citrix.com>
Date: Tue, 3 Nov 2015 17:15:39 +0000 (+0100)
Subject: x86: correct {a,m}perf check in generic_identify()
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=b104a0ad2880123b0d36b57af0478cf56b9b412c;p=people%2Fliuw%2Flibxenctrl-split%2Fxen.git

x86: correct {a,m}perf check in generic_identify()

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---

diff --git a/xen/arch/x86/cpu/common.c b/xen/arch/x86/cpu/common.c
index 653b052196..02f25046fd 100644
--- a/xen/arch/x86/cpu/common.c
+++ b/xen/arch/x86/cpu/common.c
@@ -239,7 +239,7 @@ static void __cpuinit generic_identify(struct cpuinfo_x86 *c)
 	if ( cpu_has(c, X86_FEATURE_CLFLSH) )
 		c->x86_clflush_size = ((ebx >> 8) & 0xff) * 8;
 
-	if ( (c->cpuid_level > CPUID_PM_LEAF) &&
+	if ( (c->cpuid_level >= CPUID_PM_LEAF) &&
 	     (cpuid_ecx(CPUID_PM_LEAF) & CPUID6_ECX_APERFMPERF_CAPABILITY) )
 		set_bit(X86_FEATURE_APERFMPERF, c->x86_capability);