[3.11.y.z extended stable] Patch "intel_pstate: Add X86_FEATURE_APERFMPERF to cpu match parameters." has been added to staging queue
Luis Henriques
luis.henriques at canonical.com
Mon Jan 13 14:44:25 UTC 2014
This is a note to let you know that I have just added a patch titled
intel_pstate: Add X86_FEATURE_APERFMPERF to cpu match parameters.
to the linux-3.11.y-queue branch of the 3.11.y.z extended stable tree
which can be found at:
http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.11.y-queue
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.11.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Luis
------
>From 87d62810bb04d04f4b20d5b4d5be47835b64527b Mon Sep 17 00:00:00 2001
From: Dirk Brandewie <dirk.j.brandewie at intel.com>
Date: Mon, 6 Jan 2014 10:59:16 -0800
Subject: intel_pstate: Add X86_FEATURE_APERFMPERF to cpu match parameters.
commit 6cbd7ee10e2842a3d1f9b60abede1c8f3d1f1130 upstream.
KVM environments do not support APERF/MPERF MSRs. intel_pstate cannot
operate without these registers.
The previous validity checks in intel_pstate_msrs_not_valid() are
insufficent in nested KVMs.
References: https://bugzilla.redhat.com/show_bug.cgi?id=1046317
Signed-off-by: Dirk Brandewie <dirk.j.brandewie at intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki at intel.com>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
drivers/cpufreq/intel_pstate.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 85f02a0..8d10dda 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -520,7 +520,8 @@ static void intel_pstate_timer_func(unsigned long __data)
}
#define ICPU(model, policy) \
- { X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, (unsigned long)&policy }
+ { X86_VENDOR_INTEL, 6, model, X86_FEATURE_APERFMPERF,\
+ (unsigned long)&policy }
static const struct x86_cpu_id intel_pstate_cpu_ids[] = {
ICPU(0x2a, default_policy),
--
1.8.3.2
More information about the kernel-team
mailing list