linux-kernel - [PATCH V5 9/10] KVM/MMU: Flush tlb directly in the kvm_set_pte

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Message-Id: <20181108091447.8275-10-Tianyu.Lan@microsoft.com>
Date:   Thu,  8 Nov 2018 17:14:46 +0800
From:   ltykernel@...il.com
To:     unlisted-recipients:; (no To-header on input)
Cc:     Lan Tianyu <Tianyu.Lan@...rosoft.com>, pbonzini@...hat.com,
        rkrcmar@...hat.com, tglx@...utronix.de, mingo@...hat.com,
        bp@...en8.de, hpa@...or.com, x86@...nel.org, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, michael.h.kelley@...rosoft.com,
        kys@...rosoft.com, vkuznets@...hat.com, linux@...linux.org.uk
Subject: [PATCH V5 9/10] KVM/MMU: Flush tlb directly in the kvm_set_pte_rmapp()

From: Lan Tianyu <Tianyu.Lan@...rosoft.com>

This patch is to flush tlb directly in the kvm_set_pte_rmapp()
and return 0.

Signed-off-by: Lan Tianyu <Tianyu.Lan@...rosoft.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 b13b419166c4..39e0e2572710 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1776,6 +1776,11 @@ static int kvm_set_pte_rmapp(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
 		}
 	}
 
+	if (need_flush && kvm_available_flush_tlb_with_range()) {
+		kvm_flush_remote_tlbs_with_address(kvm, gfn, 1);
+		return 0;
+	}
+
 	return need_flush;
 }
 
-- 
2.14.4