diff options
| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2021-04-05 17:42:53 +0100 |
|---|---|---|
| committer | Mathieu Poirier <mathieu.poirier@linaro.org> | 2021-04-06 16:05:20 -0600 |
| commit | d2602bb4f5a450642b96d467e27e6d5d3ef7fa54 (patch) | |
| tree | 3b8135ff3455cff344767192995cc11662101e00 /arch/arm64/include/asm/kvm_host.h | |
| parent | cc427cbb15375f1229e78908064cdff98138b8b1 (diff) | |
KVM: arm64: Move SPE availability check to VCPU load
At the moment, we check the availability of SPE on the given
CPU (i.e, SPE is implemented and is allowed at the host) during
every guest entry. This can be optimized a bit by moving the
check to vcpu_load time and recording the availability of the
feature on the current CPU via a new flag. This will also be useful
for adding the TRBE support.
Cc: Marc Zyngier <maz@kernel.org>
Cc: Will Deacon <will@kernel.org>
Cc: Alexandru Elisei <Alexandru.Elisei@arm.com>
Cc: James Morse <james.morse@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210405164307.1720226-7-suzuki.poulose@arm.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Diffstat (limited to 'arch/arm64/include/asm/kvm_host.h')
| -rw-r--r-- | arch/arm64/include/asm/kvm_host.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 3d10e6527f7d..acc2b45dd433 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -400,6 +400,7 @@ struct kvm_vcpu_arch { #define KVM_ARM64_GUEST_HAS_PTRAUTH (1 << 7) /* PTRAUTH exposed to guest */ #define KVM_ARM64_PENDING_EXCEPTION (1 << 8) /* Exception pending */ #define KVM_ARM64_EXCEPT_MASK (7 << 9) /* Target EL/MODE */ +#define KVM_ARM64_DEBUG_STATE_SAVE_SPE (1 << 12) /* Save SPE context if active */ /* * When KVM_ARM64_PENDING_EXCEPTION is set, KVM_ARM64_EXCEPT_MASK can @@ -734,6 +735,10 @@ static inline bool kvm_pmu_counter_deferred(struct perf_event_attr *attr) return (!has_vhe() && attr->exclude_host); } +/* Flags for host debug state */ +void kvm_arch_vcpu_load_debug_state_flags(struct kvm_vcpu *vcpu); +void kvm_arch_vcpu_put_debug_state_flags(struct kvm_vcpu *vcpu); + #ifdef CONFIG_KVM /* Avoid conflicts with core headers if CONFIG_KVM=n */ static inline int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu) { |