diff options
| author | Quentin Perret <qperret@google.com> | 2021-03-19 13:01:21 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2021-03-19 15:01:20 +0300 |
| commit | 7a440cc78392c3caf805ef0afc7ead031e4d0830 (patch) | |
| tree | 519090f45eec37e78f243ab5f44b2d46469b0a3a /arch/arm64/include/asm/kvm_host.h | |
| parent | 8e17c66249e9ea08b44879c7af0315e70a83316c (diff) | |
| download | linux-7a440cc78392c3caf805ef0afc7ead031e4d0830.tar.xz | |
KVM: arm64: Enable access to sanitized CPU features at EL2
Introduce the infrastructure in KVM enabling to copy CPU feature
registers into EL2-owned data-structures, to allow reading sanitised
values directly at EL2 in nVHE.
Given that only a subset of these features are being read by the
hypervisor, the ones that need to be copied are to be listed under
<asm/kvm_cpufeature.h> together with the name of the nVHE variable that
will hold the copy. This introduces only the infrastructure enabling
this copy. The first users will follow shortly.
Signed-off-by: Quentin Perret <qperret@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210319100146.1149909-14-qperret@google.com
Diffstat (limited to 'arch/arm64/include/asm/kvm_host.h')
| -rw-r--r-- | arch/arm64/include/asm/kvm_host.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 6a2031af9562..02e172dc5087 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -740,9 +740,13 @@ void kvm_clr_pmu_events(u32 clr); void kvm_vcpu_pmu_restore_guest(struct kvm_vcpu *vcpu); void kvm_vcpu_pmu_restore_host(struct kvm_vcpu *vcpu); + +void setup_kvm_el2_caps(void); #else static inline void kvm_set_pmu_events(u32 set, struct perf_event_attr *attr) {} static inline void kvm_clr_pmu_events(u32 clr) {} + +static inline void setup_kvm_el2_caps(void) {} #endif void kvm_vcpu_load_sysregs_vhe(struct kvm_vcpu *vcpu); |