linux-kernel - [PATCH] x86/cpu: add some advanced power management bits

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Message-ID: <1458871720-3209-1-git-send-email-ray.huang@amd.com>
Date:	Fri, 25 Mar 2016 10:08:40 +0800
From:	Huang Rui <ray.huang@....com>
To:	Borislav Petkov <bp@...e.de>, Thomas Gleixner <tglx@...utronix.de>,
	"Len Brown" <lenb@...nel.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	"Ingo Molnar" <mingo@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
	Fenghua Yu <fenghua.yu@...el.com>,
	Tony Luck <tony.luck@...el.com>,
	Andy Lutomirski <luto@...capital.net>,
	Peter Zijlstra <peterz@...radead.org>
CC:	<linux-kernel@...r.kernel.org>, <x86@...nel.org>,
	Fengguang Wu <fengguang.wu@...el.com>,
	Sherry Hurwitz <sherry.hurwitz@....com>,
	Tony Li <tony.li@....com>, Huang Rui <ray.huang@....com>
Subject: [PATCH] x86/cpu: add some advanced power management bits

Bit 11 of CPUID 8000_0007 edx is processor feedback interface.
Bit 12 of CPUID 8000_0007 edx is accumulated power.

So this patch fixes the output of cpuinfo, and add some new names to
make it more meaningful.

Reported-by: Borislav Petkov <bp@...en8.de>
Signed-off-by: Huang Rui <ray.huang@....com>
---
 arch/x86/kernel/cpu/powerflags.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kernel/cpu/powerflags.c b/arch/x86/kernel/cpu/powerflags.c
index 31f0f33..1dd8294 100644
--- a/arch/x86/kernel/cpu/powerflags.c
+++ b/arch/x86/kernel/cpu/powerflags.c
@@ -18,4 +18,6 @@ const char *const x86_power_flags[32] = {
 	"",	/* tsc invariant mapped to constant_tsc */
 	"cpb",  /* core performance boost */
 	"eff_freq_ro", /* Readonly aperf/mperf */
+	"proc_feedback", /* processor feedback interface */
+	"acc_power", /* accumulated power mechanism */
 };
-- 
1.9.1