From 3c404b578fab699c4708279938078d9404b255a4 Mon Sep 17 00:00:00 2001 From: Glauber Costa Date: Mon, 11 Jul 2011 15:28:15 -0400 Subject: KVM guest: Add a pv_ops stub for steal time This patch adds a function pointer in one of the many paravirt_ops structs, to allow guests to register a steal time function. Besides a steal time function, we also declare two jump_labels. They will be used to allow the steal time code to be easily bypassed when not in use. Signed-off-by: Glauber Costa Acked-by: Rik van Riel Tested-by: Eric B Munson CC: Jeremy Fitzhardinge CC: Peter Zijlstra CC: Anthony Liguori Signed-off-by: Avi Kivity --- arch/x86/include/asm/paravirt.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'arch/x86/include/asm/paravirt.h') diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h index ebbc4d8ab170..a7d2db9a74fb 100644 --- a/arch/x86/include/asm/paravirt.h +++ b/arch/x86/include/asm/paravirt.h @@ -230,6 +230,15 @@ static inline unsigned long long paravirt_sched_clock(void) return PVOP_CALL0(unsigned long long, pv_time_ops.sched_clock); } +struct jump_label_key; +extern struct jump_label_key paravirt_steal_enabled; +extern struct jump_label_key paravirt_steal_rq_enabled; + +static inline u64 paravirt_steal_clock(int cpu) +{ + return PVOP_CALL1(u64, pv_time_ops.steal_clock, cpu); +} + static inline unsigned long long paravirt_read_pmc(int counter) { return PVOP_CALL1(u64, pv_cpu_ops.read_pmc, counter); -- cgit v1.2.3