x86: introduce native_read_tscp

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Targetting paravirt, this patch introduces native_read_tscp, in
place of rdtscp() macro. When in a paravirt guest, this will
involve a function call, and thus, cannot be done in the vdso area.
These users then have to call the native version directly

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

...

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Glauber de Oliveira Costa 2008-01-30 13:31:06 +01:00 • committed by Ingo Molnar

parent c758ecf62a

commit 8f12dea613

3 changed files with 25 additions and 12 deletions

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4

arch/x86/kernel/vsyscall_64.c

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4

arch/x86/vdso/vgetcpu.c

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29

include/asm-x86/msr.h

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