linux-kernel - [PATCH] x86, amd: Move CPB flag from "flags" to "power management" section in /proc/cpuinfo

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20101006163354.GA31153@loge.amd.com>
Date:	Wed, 6 Oct 2010 18:33:54 +0200
From:	Andreas Herrmann <herrmann.der.user@...glemail.com>
To:	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org,
	Borislav Petkov <borislav.petkov@....com>
Subject: [PATCH] x86, amd: Move CPB flag from "flags" to "power management"
 section in /proc/cpuinfo

From: Andreas Herrmann <andreas.herrmann3@....com>

Avoid nameless flag in /proc/cpuinfo, ie.

   power management: ts tm 100mhzsteps hwpstate [9]

and indicate CPB support rather in the power management section
instead of the general feature flags section of /proc/cpuinfo.  The
flag is provided with the same cpuid function like the other power
management flags (CPUID Fn8000_0007_EDX).

Signed-off-by: Andreas Herrmann <andreas.herrmann3@....com>
---
 arch/x86/include/asm/cpufeature.h |    2 +-
 arch/x86/kernel/cpu/powerflags.c  |    3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index 220e2ea..3ef222b 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -167,7 +167,7 @@
  */
 #define X86_FEATURE_IDA		(7*32+ 0) /* Intel Dynamic Acceleration */
 #define X86_FEATURE_ARAT	(7*32+ 1) /* Always Running APIC Timer */
-#define X86_FEATURE_CPB		(7*32+ 2) /* AMD Core Performance Boost */
+#define X86_FEATURE_CPB		(7*32+ 2) /* "" AMD Core Performance Boost */
 #define X86_FEATURE_EPB		(7*32+ 3) /* IA32_ENERGY_PERF_BIAS support */
 #define X86_FEATURE_XSAVEOPT	(7*32+ 4) /* Optimized Xsave */
 #define X86_FEATURE_PLN		(7*32+ 5) /* Intel Power Limit Notification */
diff --git a/arch/x86/kernel/cpu/powerflags.c b/arch/x86/kernel/cpu/powerflags.c
index 5abbea2..3215558 100644
--- a/arch/x86/kernel/cpu/powerflags.c
+++ b/arch/x86/kernel/cpu/powerflags.c
@@ -16,5 +16,6 @@ const char *const x86_power_flags[32] = {
 	"100mhzsteps",
 	"hwpstate",
 	"",	/* tsc invariant mapped to constant_tsc */
-		/* nothing */
+	"cpb",
+	/* nothing */
 };
-- 
1.6.4.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/