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Commit a7b9d2cc authored by Gleb Natapov's avatar Gleb Natapov Committed by Avi Kivity
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KVM: PMU: warn when pin control is set in eventsel msr 



Print warning once if pin control bit is set in eventsel msr since
emulation does not support it yet.

Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent 9ee73970

arch/x86/include/asm/perf_event.h

+1 −0
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 
#define ARCH_PERFMON_EVENTSEL_USR			(1ULL << 16)

#define ARCH_PERFMON_EVENTSEL_OS			(1ULL << 17)

#define ARCH_PERFMON_EVENTSEL_EDGE			(1ULL << 18)

#define ARCH_PERFMON_EVENTSEL_PIN_CONTROL		(1ULL << 19)

#define ARCH_PERFMON_EVENTSEL_INT			(1ULL << 20)

#define ARCH_PERFMON_EVENTSEL_ANY			(1ULL << 21)

#define ARCH_PERFMON_EVENTSEL_ENABLE			(1ULL << 22)

arch/x86/kvm/pmu.c

+3 −0
Original line number Diff line number Diff line
@@ -210,6 +210,9 @@ static void reprogram_gp_counter(struct kvm_pmc *pmc, u64 eventsel) 
	unsigned config, type = PERF_TYPE_RAW;

	u8 event_select, unit_mask;



	if (eventsel & ARCH_PERFMON_EVENTSEL_PIN_CONTROL)

		printk_once("kvm pmu: pin control bit is ignored\n");



	pmc->eventsel = eventsel;



	stop_counter(pmc);