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KVM: MIPS: let generic code call prepare_flush_shadow

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Since all calls to kvm_flush_remote_tlbs must be preceded by
kvm_mips_callbacks->prepare_flush_shadow, repurpose
kvm_arch_flush_remote_tlb to invoke it.  This makes it possible
to use the TLB flushing mechanism provided by the generic MMU
notifier code.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2021-04-02 11:44:56 +02:00
parent 5194552fb1
commit 566a0beef5
3 changed files with 10 additions and 10 deletions
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3
arch/mips/include/asm/kvm_host.h
View File

@ -1142,4 +1142,7 @@ static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLB
int kvm_arch_flush_remote_tlb(struct kvm *kvm);
#endif /* __MIPS_KVM_HOST_H__ */

11
arch/mips/kvm/mips.c
View File

@ -204,9 +204,6 @@ void kvm_arch_flush_shadow_all(struct kvm *kvm)
{
/* Flush whole GPA */
kvm_mips_flush_gpa_pt(kvm, 0, ~0);
/* Let implementation do the rest */
kvm_mips_callbacks->prepare_flush_shadow(kvm);
kvm_flush_remote_tlbs(kvm);
}
@ -995,11 +992,15 @@ void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
}
int kvm_arch_flush_remote_tlb(struct kvm *kvm)
{
kvm_mips_callbacks->prepare_flush_shadow(kvm);
return 1;
}
void kvm_arch_flush_remote_tlbs_memslot(struct kvm *kvm,
const struct kvm_memory_slot *memslot)
{
/* Let implementation handle TLB/GVA invalidation */
kvm_mips_callbacks->prepare_flush_shadow(kvm);
kvm_flush_remote_tlbs(kvm);
}

6
arch/mips/kvm/mmu.c
View File

@ -490,8 +490,6 @@ int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end,
unsigned flags)
{
handle_hva_to_gpa(kvm, start, end, &kvm_unmap_hva_handler, NULL);
kvm_mips_callbacks->prepare_flush_shadow(kvm);
kvm_flush_remote_tlbs(kvm);
return 0;
}
@ -533,10 +531,8 @@ int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
int ret;
ret = handle_hva_to_gpa(kvm, hva, end, &kvm_set_spte_handler, &pte);
if (ret) {
kvm_mips_callbacks->prepare_flush_shadow(kvm);
if (ret)
kvm_flush_remote_tlbs(kvm);
}
return 0;
}