[PATCH 42/45] KVM: arm64: Free sve_state via arm specific hook

Sean Christopherson
2019-10-22T01:59:22Z

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>
---
arch/arm/include/asm/kvm_host.h | 1 +
arch/arm64/include/asm/kvm_host.h | 1 +
arch/arm64/kvm/reset.c | 5 +++++
virt/kvm/arm/arm.c | 2 ++
4 files changed, 9 insertions(+)

diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h
index 8a37c8e89777..cc414de5acd3 100644
--- a/arch/arm/include/asm/kvm_host.h
+++ b/arch/arm/include/asm/kvm_host.h
@@ -333,6 +333,7 @@ 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 int 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) {}
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index f656169db8c3..92d7c384a4ed 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -52,6 +52,7 @@ int kvm_arm_init_sve(void);

int __attribute_const__ kvm_target_cpu(void);
int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
+int 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);
diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c
index f4a8ae918827..98abc4278f42 100644
--- a/arch/arm64/kvm/reset.c
+++ b/arch/arm64/kvm/reset.c
@@ -205,6 +205,11 @@ bool kvm_arm_vcpu_is_finalized(struct kvm_vcpu *vcpu)
}

void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
+{
+
+}
+
+int kvm_arm_vcpu_destroy(struct kvm_vcpu *vcpu)
{
kfree(vcpu->arch.sve_state);
}
diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c
index aac4e5a1a521..b38088415cde 100644
--- a/virt/kvm/arm/arm.c
+++ b/virt/kvm/arm/arm.c
@@ -298,6 +298,8 @@ 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)
--
2.22.0