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xen-devel
[Xen-devel] Re: [RFC, PATCH 17/24] i386 Vmi msr patch
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To: |
virtualization@xxxxxxxxxxxxxx |
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Subject: |
[Xen-devel] Re: [RFC, PATCH 17/24] i386 Vmi msr patch |
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From: |
Andi Kleen <ak@xxxxxxx> |
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Date: |
Wed, 22 Mar 2006 21:21:32 +0100 |
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Cc: |
Zachary Amsden <zach@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Pratap Subrahmanyam <pratap@xxxxxxxxxx>, Wim Coekaerts <wim.coekaerts@xxxxxxxxxx>, Joshua LeVasseur <jtl@xxxxxxxxxx>, Dan Hecht <dhecht@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Jack Lo <jlo@xxxxxxxxxx>, Christopher Li <chrisl@xxxxxxxxxx>, Chris Wright <chrisw@xxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxx>, Anne Holler <anne@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxxxx>, Jyothy Reddy <jreddy@xxxxxxxxxx>, Kip Macy <kmacy@xxxxxxxxxxx>, Ky Srinivasan <ksrinivasan@xxxxxxxxxx>, Leendert van Doorn <leendert@xxxxxxxxxxxxxx>, Dan Arai <arai@xxxxxxxxxx> |
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Thu, 23 Mar 2006 17:46:24 +0000 |
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> -#define rdtsc(low,high) \
> - __asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high))
> -
> -#define rdtscl(low) \
> - __asm__ __volatile__("rdtsc" : "=a" (low) : : "edx")
> -
> -#define rdtscll(val) \
> - __asm__ __volatile__("rdtsc" : "=A" (val))
> -
> -#define write_tsc(val1,val2) wrmsr(0x10, val1, val2)
> -
> -#define rdpmc(counter,low,high) \
> - __asm__ __volatile__("rdpmc" \
> - : "=a" (low), "=d" (high) \
> - : "c" (counter))
The kernel doesn't use rdpmc. And moving rdtsc is useless
as I wrote earlier.
But mostly it is used from user space and you will break everything there.
-Andi
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