[PATCH 4/4] KVM: MIPS: defer flush to generic MMU notifier code

Paolo Bonzini
2021-04-02T15:58:26Z

Return 1 from kvm_unmap_hva_range and kvm_set_spte_hva if a flush is
needed, so that the generic code can coalesce the flushes.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
arch/mips/kvm/mmu.c | 11 ++---------
1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/arch/mips/kvm/mmu.c b/arch/mips/kvm/mmu.c
index 2cedf908d744..a3a49b009dc4 100644
--- a/arch/mips/kvm/mmu.c
+++ b/arch/mips/kvm/mmu.c
@@ -489,9 +489,7 @@ static int kvm_unmap_hva_handler(struct kvm *kvm, gfn_t gfn, gfn_t gfn_end,
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_flush_remote_tlbs(kvm);
- return 0;
+ return handle_hva_to_gpa(kvm, start, end, &kvm_unmap_hva_handler, NULL);
}

static int kvm_set_spte_handler(struct kvm *kvm, gfn_t gfn, gfn_t gfn_end,
@@ -528,12 +526,7 @@ static int kvm_set_spte_handler(struct kvm *kvm, gfn_t gfn, gfn_t gfn_end,
int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
{
unsigned long end = hva + PAGE_SIZE;
- int ret;
-
- ret = handle_hva_to_gpa(kvm, hva, end, &kvm_set_spte_handler, &pte);
- if (ret)
- kvm_flush_remote_tlbs(kvm);
- return 0;
+ return handle_hva_to_gpa(kvm, hva, end, &kvm_set_spte_handler, &pte);
}

static int kvm_age_hva_handler(struct kvm *kvm, gfn_t gfn, gfn_t gfn_end,
--
2.30.1