[kvm-unit-tests PATCH 1/4] x86/pmu: Enable PEBS on fixed counters iff baseline PEBS is support

[Sean Christopherson <seanjc@google.com>]

Enabling PEBS for fixed counters is only allowed if "Extended PEBS" is
supported, and unfortunately "Extended PEBS" is bundled with a pile of
other PEBS features under the "Baseline" umbrella.  KVM emulates this
correctly and disallows enabling PEBS on fixed counters if the vCPU
doesn't have Baseline PEBS support.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 x86/pmu_pebs.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/x86/pmu_pebs.c b/x86/pmu_pebs.c
index f7b52b90..050617cd 100644
--- a/x86/pmu_pebs.c
+++ b/x86/pmu_pebs.c
@@ -356,13 +356,13 @@ static void check_pebs_counters(u64 pebs_data_cfg)
 	unsigned int idx;
 	u64 bitmask = 0;
 
-	for (idx = 0; idx < pmu.nr_fixed_counters; idx++)
+	for (idx = 0; has_baseline && idx < pmu.nr_fixed_counters; idx++)
 		check_one_counter(FIXED, idx, pebs_data_cfg);
 
 	for (idx = 0; idx < max_nr_gp_events; idx++)
 		check_one_counter(GP, idx, pebs_data_cfg);
 
-	for (idx = 0; idx < pmu.nr_fixed_counters; idx++)
+	for (idx = 0; has_baseline && idx < pmu.nr_fixed_counters; idx++)
 		bitmask |= BIT_ULL(FIXED_CNT_INDEX + idx);
 	for (idx = 0; idx < max_nr_gp_events; idx += 2)
 		bitmask |= BIT_ULL(idx);
-- 
2.44.0.278.ge034bb2e1d-goog