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Cc:     Lan Tianyu <Tianyu.Lan@microsoft.com>, christoffer.dall@arm.com,
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Subject: [PATCH V3 5/10] KVM/MMU: Flush tlb directly in the kvm_mmu_slot_gfn_write_protect()
Date:   Fri, 22 Feb 2019 23:06:32 +0800
Message-Id: <20190222150637.2337-6-Tianyu.Lan@microsoft.com>
In-Reply-To: <20190222150637.2337-1-Tianyu.Lan@microsoft.com>
References: <20190222150637.2337-1-Tianyu.Lan@microsoft.com>
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From: Lan Tianyu <Tianyu.Lan@microsoft.com>

This patch is to flush tlb directly in the kvm_mmu_slot_gfn_write_protect()
when range flush is available.

Signed-off-by: Lan Tianyu <Tianyu.Lan@microsoft.com>
---
 arch/x86/kvm/mmu.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 7a862c56b954..60b1771e400e 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1729,6 +1729,11 @@ bool kvm_mmu_slot_gfn_write_protect(struct kvm *kvm,
 		write_protected |= __rmap_write_protect(kvm, rmap_head, true);
 	}
 
+	if (write_protected && kvm_available_flush_tlb_with_range()) {
+		kvm_flush_remote_tlbs_with_address(kvm, gfn, 1);
+		write_protected = false;
+	}
+
 	return write_protected;
 }
 
-- 
2.14.4