linux-kernel - [PATCH 5.15 153/207] KVM: x86/mmu: Pass parameter flush as false in kvm_tdp_mmu_zap_collapsible

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Date:   Mon,  6 Dec 2021 15:56:47 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Hou Wenlong <houwenlong93@...ux.alibaba.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 153/207] KVM: x86/mmu: Pass parameter flush as false in kvm_tdp_mmu_zap_collapsible_sptes()

From: Hou Wenlong <houwenlong93@...ux.alibaba.com>

[ Upstream commit 8ed716ca7dc91f058be0ba644a3048667a20db13 ]

Since tlb flush has been done for legacy MMU before
kvm_tdp_mmu_zap_collapsible_sptes(), so the parameter flush
should be false for kvm_tdp_mmu_zap_collapsible_sptes().

Fixes: e2209710ccc5d ("KVM: x86/mmu: Skip rmap operations if rmaps not allocated")
Signed-off-by: Hou Wenlong <houwenlong93@...ux.alibaba.com>
Message-Id: <21453a1d2533afb6e59fb6c729af89e771ff2e76.1637140154.git.houwenlong93@...ux.alibaba.com>
Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/x86/kvm/mmu/mmu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 9d04474b00272..c9b1d63d3cfba 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -5855,7 +5855,7 @@ static bool kvm_mmu_zap_collapsible_spte(struct kvm *kvm,
 void kvm_mmu_zap_collapsible_sptes(struct kvm *kvm,
 				   const struct kvm_memory_slot *slot)
 {
-	bool flush = false;
+	bool flush;
 
 	if (kvm_memslots_have_rmaps(kvm)) {
 		write_lock(&kvm->mmu_lock);
@@ -5867,7 +5867,7 @@ void kvm_mmu_zap_collapsible_sptes(struct kvm *kvm,
 
 	if (is_tdp_mmu_enabled(kvm)) {
 		read_lock(&kvm->mmu_lock);
-		flush = kvm_tdp_mmu_zap_collapsible_sptes(kvm, slot, flush);
+		flush = kvm_tdp_mmu_zap_collapsible_sptes(kvm, slot, false);
 		if (flush)
 			kvm_arch_flush_remote_tlbs_memslot(kvm, slot);
 		read_unlock(&kvm->mmu_lock);
-- 
2.33.0