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Date: Fri, 1 Feb 2019 21:14:48 -0800
From: Fenghua Yu <fenghua.yu@...el.com>
To: "Thomas Gleixner" <tglx@...utronix.de>,
"Ingo Molnar" <mingo@...hat.com>, "H Peter Anvin" <hpa@...or.com>,
"Dave Hansen" <dave.hansen@...el.com>,
"Ashok Raj" <ashok.raj@...el.com>,
"Peter Zijlstra" <peterz@...radead.org>,
"Michael Chan" <michael.chan@...adcom.com>,
"Ravi V Shankar" <ravi.v.shankar@...el.com>,
"Ricardo Neri" <ricardo.neri@...el.com>
Cc: "linux-kernel" <linux-kernel@...r.kernel.org>,
"x86" <x86@...nel.org>, Fenghua Yu <fenghua.yu@...el.com>
Subject: [PATCH v3 07/10] Change document for kernel option clearcpuid
Since kernel option clearcpuid now supports multiple options and CPU
capability flags, the document needs to be changed.
Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
---
Documentation/admin-guide/kernel-parameters.txt | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index b799bcf67d7b..13bf223c7739 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -558,10 +558,12 @@
loops can be debugged more effectively on production
systems.
- clearcpuid=BITNUM [X86]
+ clearcpuid=BITNUM | FLAG [X86]
Disable CPUID feature X for the kernel. See
arch/x86/include/asm/cpufeatures.h for the valid bit
- numbers. Note the Linux specific bits are not necessarily
+ numbers or /proc/cpuinfo for valid CPU flags.
+ Multiple options can be used to disable a few features.
+ Note the Linux specific bits are not necessarily
stable over kernel options, but the vendor specific
ones should be.
Also note that user programs calling CPUID directly
--
2.7.4
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