From: Keir Fraser <keir.fraser@citrix.com>
Date: Fri, 16 Jan 2009 15:32:12 +0000 (+0000)
Subject: x86: Let dom0 write MPERF/APERF MSRs if it is managing cpufreq.
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~14014^2~49
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https://%22%22/%22http:/www.example.com/cgi/%22https:/%22%22?a=commitdiff_plain;h=36b4fb7408b0bf5dbdc3082836f3e4ae0b4f5703;p=xen.git

x86: Let dom0 write MPERF/APERF MSRs if it is managing cpufreq.

Signed-off-by: Chris Lalancette <clalance@redhat.com>
---

diff --git a/xen/arch/x86/traps.c b/xen/arch/x86/traps.c
index cd23b9bc50..226cc899da 100644
--- a/xen/arch/x86/traps.c
+++ b/xen/arch/x86/traps.c
@@ -2178,6 +2178,8 @@ static int emulate_privileged_op(struct cpu_user_regs *regs)
             if ( wrmsr_safe(MSR_FAM10H_MMIO_CONF_BASE, eax, edx) != 0 )
                 goto fail;
             break;
+        case MSR_IA32_MPERF:
+        case MSR_IA32_APERF:
         case MSR_IA32_PERF_CTL:
             if ( boot_cpu_data.x86_vendor != X86_VENDOR_INTEL )
                 goto fail;