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| author | Paolo Bonzini <pbonzini@redhat.com> | 2021-01-25 18:52:01 -0500 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-01-25 18:52:01 -0500 |
| commit | 615099b01eb7127fb2f4bc956171a6a0accf688b (patch) | |
| tree | 4659f3c859797375d95587d2cd3e47cf7e295a32 /arch/arm64/kvm/pmu-emul.c | |
| parent | 7c53f6b671f4aba70ff15e1b05148b10d58c2837 (diff) | |
| parent | 139bc8a6146d92822c866cf2fd410159c56b3648 (diff) | |
| download | linux-615099b01eb7127fb2f4bc956171a6a0accf688b.tar.bz2 | |
Merge tag 'kvmarm-fixes-5.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm64 fixes for 5.11, take #2
- Don't allow tagged pointers to point to memslots
- Filter out ARMv8.1+ PMU events on v8.0 hardware
- Hide PMU registers from userspace when no PMU is configured
- More PMU cleanups
- Don't try to handle broken PSCI firmware
- More sys_reg() to reg_to_encoding() conversions
Diffstat (limited to 'arch/arm64/kvm/pmu-emul.c')
| -rw-r--r-- | arch/arm64/kvm/pmu-emul.c | 10 |
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; |