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Diffstat (limited to 'arch/arm64/kvm/pmu-emul.c')
-rw-r--r--arch/arm64/kvm/pmu-emul.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/arch/arm64/kvm/pmu-emul.c b/arch/arm64/kvm/pmu-emul.c
index 4ad66a532e38..247422ac78a9 100644
--- a/arch/arm64/kvm/pmu-emul.c
+++ b/arch/arm64/kvm/pmu-emul.c
@@ -788,7 +788,7 @@ u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1)
{
unsigned long *bmap = vcpu->kvm->arch.pmu_filter;
u64 val, mask = 0;
- int base, i;
+ int base, i, nr_events;
if (!pmceid1) {
val = read_sysreg(pmceid0_el0);
@@ -801,13 +801,17 @@ u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1)
if (!bmap)
return val;
+ nr_events = kvm_pmu_event_mask(vcpu->kvm) + 1;
+
for (i = 0; i < 32; i += 8) {
u64 byte;
byte = bitmap_get_value8(bmap, base + i);
mask |= byte << i;
- byte = bitmap_get_value8(bmap, 0x4000 + base + i);
- mask |= byte << (32 + i);
+ if (nr_events >= (0x4000 + base + 32)) {
+ byte = bitmap_get_value8(bmap, 0x4000 + base + i);
+ mask |= byte << (32 + i);
+ }
}
return val & mask;