From: Andi Kleen <a...@linux.intel.com>
This is not arch perfmon, but older CPUs will just ignore it. This makes
it possible to do at least some TSX measurements from a KVM guest
Cc: a...@redhat.com
Signed-off-by: Andi Kleen <a...@linux.intel.com>
---
arch/x86/kernel/cpu/perf_event_intel.c | 3 ++-
arch/x86/kvm/pmu.c | 10 +++++++---
2 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_event_intel.c
b/arch/x86/kernel/cpu/perf_event_intel.c
index 7dab353..cd48669 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -1631,7 +1631,8 @@ static int hsw_hw_config(struct perf_event *event)
return 0;
}
-static struct event_constraint counter2_constraint = EVENT_CONSTRAINT(0, 0x4,
0);
+static struct event_constraint counter2_constraint =
+ EVENT_CONSTRAINT(0, 0x4, 0);
static struct event_constraint *
hsw_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event)
diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c
index 9b7ec11..03ba87b 100644
--- a/arch/x86/kvm/pmu.c
+++ b/arch/x86/kvm/pmu.c
@@ -160,7 +160,7 @@ static void stop_counter(struct kvm_pmc *pmc)
static void reprogram_counter(struct kvm_pmc *pmc, u32 type,
unsigned config, bool exclude_user, bool exclude_kernel,
- bool intr)
+ bool intr, bool intx, bool intx_cp)
{
struct perf_event *event;
struct perf_event_attr attr = {
@@ -172,6 +172,8 @@ static void reprogram_counter(struct kvm_pmc *pmc, u32 type,
.exclude_user = exclude_user,
.exclude_kernel = exclude_kernel,
.config = config,
+ .intx = intx,
+ .intx_checkpointed = intx_cp
};
attr.sample_period = (-pmc->counter) & pmc_bitmask(pmc);
@@ -239,7 +241,9 @@ static void reprogram_gp_counter(struct kvm_pmc *pmc, u64
eventsel)
reprogram_counter(pmc, type, config,
!(eventsel & ARCH_PERFMON_EVENTSEL_USR),
!(eventsel & ARCH_PERFMON_EVENTSEL_OS),
- eventsel & ARCH_PERFMON_EVENTSEL_INT);
+ eventsel & ARCH_PERFMON_EVENTSEL_INT,
+ !!(eventsel & HSW_INTX),
+ !!(eventsel & HSW_INTX_CHECKPOINTED));
}
static void reprogram_fixed_counter(struct kvm_pmc *pmc, u8 en_pmi, int idx)
@@ -256,7 +260,7 @@ static void reprogram_fixed_counter(struct kvm_pmc *pmc, u8
en_pmi, int idx)
arch_events[fixed_pmc_events[idx]].event_type,
!(en & 0x2), /* exclude user */
!(en & 0x1), /* exclude kernel */
- pmi);
+ pmi, false, false);
}
static inline u8 fixed_en_pmi(u64 ctrl, int idx)
--
1.7.7.6
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
