Re: [RESEND PATCH v5 09/11] KVM: arm64: Flush only the memslot after write-protect
From: Gavin Shan <hidden>
Date: 2023-07-05 00:36:24
Also in:
kvm, kvm-riscv, kvmarm, linux-mips, linux-riscv, lkml
On 6/22/23 03:50, Raghavendra Rao Ananta wrote:
After write-protecting the region, currently KVM invalidates the entire TLB entries using kvm_flush_remote_tlbs(). Instead, scope the invalidation only to the targeted memslot. If supported, the architecture would use the range-based TLBI instructions to flush the memslot or else fallback to flushing all of the TLBs. Signed-off-by: Raghavendra Rao Ananta <redacted> --- arch/arm64/kvm/mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
Reviewed-by: Gavin Shan <redacted>
quoted hunk ↗ jump to hunk
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index c3ec2141c3284..94f10e670c100 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c@@ -992,7 +992,7 @@ static void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot) write_lock(&kvm->mmu_lock); stage2_wp_range(&kvm->arch.mmu, start, end); write_unlock(&kvm->mmu_lock); - kvm_flush_remote_tlbs(kvm); + kvm_flush_remote_tlbs_memslot(kvm, memslot); } /**
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