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| author | Glauber de Oliveira Costa <gcosta@redhat.com> | 2008-01-30 13:32:05 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:32:05 +0100 |
| commit | e5aaac443635c7c6f842f0bf8169f71f3236d574 (patch) | |
| tree | 6be4f1a7cd3e0b1614ea2bbeefcea42d9b1fffc9 /include/asm-x86/paravirt.h | |
| parent | x86: cleanup write_tsc (diff) | |
| download | linux-e5aaac443635c7c6f842f0bf8169f71f3236d574.tar.xz linux-e5aaac443635c7c6f842f0bf8169f71f3236d574.zip | |
x86: provide paravirtualized hook for rdtscp
This patch adds a field in pv_cpu_ops for a paravirtualized hook
for rdtscp, needed for x86_64.
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>
Diffstat (limited to 'include/asm-x86/paravirt.h')
| -rw-r--r-- | include/asm-x86/paravirt.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h index 66290f58e939..8f7984319c30 100644 --- a/include/asm-x86/paravirt.h +++ b/include/asm-x86/paravirt.h @@ -120,6 +120,7 @@ struct pv_cpu_ops { u64 (*read_tsc)(void); u64 (*read_pmc)(int counter); + unsigned long long (*read_tscp)(unsigned int *aux); /* These two are jmp to, not actually called. */ void (*irq_enable_syscall_ret)(void); @@ -668,6 +669,27 @@ static inline unsigned long long paravirt_read_pmc(int counter) high = _l >> 32; \ } while(0) +static inline unsigned long long paravirt_rdtscp(unsigned int *aux) +{ + return PVOP_CALL1(u64, pv_cpu_ops.read_tscp, aux); +} + +#define rdtscp(low, high, aux) \ +do { \ + int __aux; \ + unsigned long __val = paravirt_rdtscp(&__aux); \ + (low) = (u32)__val; \ + (high) = (u32)(__val >> 32); \ + (aux) = __aux; \ +} while (0) + +#define rdtscpll(val, aux) \ +do { \ + unsigned long __aux; \ + val = paravirt_rdtscp(&__aux); \ + (aux) = __aux; \ +} while (0) + static inline void load_TR_desc(void) { PVOP_VCALL0(pv_cpu_ops.load_tr_desc); |