AcoSail/kernel_optimize_test
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KVM: arm64: Free sve_state via arm specific hook

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Add an arm specific hook to free the arm64-only sve_state.  Doing so
eliminates the last functional code from kvm_arch_vcpu_uninit() across
all architectures and paves the way for removing kvm_arch_vcpu_init()
and kvm_arch_vcpu_uninit() entirely.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2019-12-18 13:55:27 -08:00 committed by Paolo Bonzini
parent 74ce2e60d4
commit 19bcc89eb8
4 changed files with 9 additions and 0 deletions
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1
arch/arm/include/asm/kvm_host.h
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@ -366,6 +366,7 @@ static inline void kvm_arch_sync_events(struct kvm *kvm) {}
static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
static inline void kvm_arm_vcpu_destroy(struct kvm_vcpu *vcpu) {}
static inline void kvm_arm_init_debug(void) {}
static inline void kvm_arm_setup_debug(struct kvm_vcpu *vcpu) {}

1
arch/arm64/include/asm/kvm_host.h
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@ -53,6 +53,7 @@ int kvm_arm_init_sve(void);
int __attribute_const__ kvm_target_cpu(void);
int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
void kvm_arm_vcpu_destroy(struct kvm_vcpu *vcpu);
void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
int kvm_arch_vm_ioctl_check_extension(struct kvm *kvm, long ext);
void __extended_idmap_trampoline(phys_addr_t boot_pgd, phys_addr_t idmap_start);

5
arch/arm64/kvm/reset.c
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@ -205,6 +205,11 @@ bool kvm_arm_vcpu_is_finalized(struct kvm_vcpu *vcpu)
}
void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
{
}
void kvm_arm_vcpu_destroy(struct kvm_vcpu *vcpu)
{
kfree(vcpu->arch.sve_state);
}

2
virt/kvm/arm/arm.c
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@ -326,6 +326,8 @@ void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
kvm_mmu_free_memory_caches(vcpu);
kvm_timer_vcpu_terminate(vcpu);
kvm_pmu_vcpu_destroy(vcpu);
kvm_arm_vcpu_destroy(vcpu);
}
int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)