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KVM: arm64: Flush only the memslot after write-protect

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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 <rananta@google.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Shaoqin Huang <shahuang@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230811045127.3308641-13-rananta@google.com
This commit is contained in:
Raghavendra Rao Ananta 2023-08-11 04:51:25 +00:00 committed by Marc Zyngier
parent c42b6f0b1c
commit 3756b6f2bb
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/kvm/mmu.c
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@ -1083,7 +1083,7 @@ 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);
}
/**