Gitweb: http://git.kernel.org/linus/ff55df53dfdd338906c8ba9d1f4a759b86b869d5
Commit: ff55df53dfdd338906c8ba9d1f4a759b86b869d5
Parent: 8b956bf1f0f2b552ed93cf6cafe823edff298b3b
Author: H. Peter Anvin <hpa@zytor.com>
AuthorDate: Mon Aug 31 14:16:57 2009 -0700
Committer: H. Peter Anvin <hpa@zytor.com>
CommitDate: Mon Aug 31 16:16:04 2009 -0700
x86, msr: Export the register-setting MSR functions via /dev/*/msr
Make it possible to access the all-register-setting/getting MSR
functions via the MSR driver. This is implemented as an ioctl() on
the standard MSR device node.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Borislav Petkov <petkovbb@gmail.com>
---
Documentation/ioctl/ioctl-number.txt | 1 +
arch/x86/include/asm/msr.h | 10 +++++-
arch/x86/kernel/msr.c | 51 ++++++++++++++++++++++++++++++++++
3 files changed, 60 insertions(+), 2 deletions(-)
diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt
index dbea4f9..1c058b5 100644
--- a/Documentation/ioctl/ioctl-number.txt
+++ b/Documentation/ioctl/ioctl-number.txt
@@ -121,6 +121,7 @@ Code Seq# Include File Comments
'c' 00-7F linux/comstats.h conflict!
'c' 00-7F linux/coda.h conflict!
'c' 80-9F arch/s390/include/asm/chsc.h
+'c' A0-AF arch/x86/include/asm/msr.h
'd' 00-FF linux/char/drm/drm/h conflict!
'd' F0-FF linux/digi1.h
'e' all linux/digi1.h conflict!
diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h
index 8e56712..7e2b6ba 100644
--- a/arch/x86/include/asm/msr.h
+++ b/arch/x86/include/asm/msr.h
@@ -3,10 +3,16 @@
#include <asm/msr-index.h>
-#ifdef __KERNEL__
#ifndef __ASSEMBLY__
#include <linux/types.h>
+#include <linux/ioctl.h>
+
+#define X86_IOC_RDMSR_REGS _IOWR('c', 0xA0, __u32[8])
+#define X86_IOC_WRMSR_REGS _IOWR('c', 0xA1, __u32[8])
+
+#ifdef __KERNEL__
+
#include <asm/asm.h>
#include <asm/errno.h>
#include <asm/cpumask.h>
@@ -286,6 ...
