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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-07-06 12:48:04 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-07-06 12:48:04 -0700 |
| commit | bfe91da29bfad9941d5d703d45e29f0812a20724 (patch) | |
| tree | e5f04b57e30de099ada784d05c7beefa4b678418 /arch/arm64/kvm/pmu.c | |
| parent | 5c82ec00dd00c7a2b02d4b42cf59ae87592cb75f (diff) | |
| parent | 8038a922cf9af5266eaff29ce996a0d1b788fc0d (diff) | |
| download | linux-bfe91da29bfad9941d5d703d45e29f0812a20724.tar.bz2 | |
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixes from Paolo Bonzini:
"Bugfixes and a one-liner patch to silence a sparse warning"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: arm64: Stop clobbering x0 for HVC_SOFT_RESTART
KVM: arm64: PMU: Fix per-CPU access in preemptible context
KVM: VMX: Use KVM_POSSIBLE_CR*_GUEST_BITS to initialize guest/host masks
KVM: x86: Mark CR4.TSD as being possibly owned by the guest
KVM: x86: Inject #GP if guest attempts to toggle CR4.LA57 in 64-bit mode
kvm: use more precise cast and do not drop __user
KVM: x86: bit 8 of non-leaf PDPEs is not reserved
KVM: X86: Fix async pf caused null-ptr-deref
KVM: arm64: vgic-v4: Plug race between non-residency and v4.1 doorbell
KVM: arm64: pvtime: Ensure task delay accounting is enabled
KVM: arm64: Fix kvm_reset_vcpu() return code being incorrect with SVE
KVM: arm64: Annotate hyp NMI-related functions as __always_inline
KVM: s390: reduce number of IO pins to 1
Diffstat (limited to 'arch/arm64/kvm/pmu.c')
| -rw-r--r-- | arch/arm64/kvm/pmu.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/arm64/kvm/pmu.c b/arch/arm64/kvm/pmu.c index b5ae3a5d509e..3c224162b3dd 100644 --- a/arch/arm64/kvm/pmu.c +++ b/arch/arm64/kvm/pmu.c @@ -159,7 +159,10 @@ static void kvm_vcpu_pmu_disable_el0(unsigned long events) } /* - * On VHE ensure that only guest events have EL0 counting enabled + * On VHE ensure that only guest events have EL0 counting enabled. + * This is called from both vcpu_{load,put} and the sysreg handling. + * Since the latter is preemptible, special care must be taken to + * disable preemption. */ void kvm_vcpu_pmu_restore_guest(struct kvm_vcpu *vcpu) { @@ -169,12 +172,14 @@ void kvm_vcpu_pmu_restore_guest(struct kvm_vcpu *vcpu) if (!has_vhe()) return; + preempt_disable(); host = this_cpu_ptr(&kvm_host_data); events_guest = host->pmu_events.events_guest; events_host = host->pmu_events.events_host; kvm_vcpu_pmu_enable_el0(events_guest); kvm_vcpu_pmu_disable_el0(events_host); + preempt_enable(); } /* |