linux-kernel - [PATCH v4 02/16] KVM: x86/mmu: fix parameters to kvm_flush_remote_tlbs_with

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Date:   Tue, 10 Aug 2021 23:52:37 +0300
From:   Maxim Levitsky <mlevitsk@...hat.com>
To:     kvm@...r.kernel.org
Cc:     Jim Mattson <jmattson@...gle.com>, linux-kernel@...r.kernel.org,
        Wanpeng Li <wanpengli@...cent.com>,
        Borislav Petkov <bp@...en8.de>, Joerg Roedel <joro@...tes.org>,
        Suravee Suthikulpanit <suravee.suthikulpanit@....com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        x86@...nel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)),
        Maxim Levitsky <mlevitsk@...hat.com>
Subject: [PATCH v4 02/16] KVM: x86/mmu: fix parameters to kvm_flush_remote_tlbs_with_address

kvm_flush_remote_tlbs_with_address expects (start gfn, number of pages),
and not (start gfn, end gfn)

Signed-off-by: Maxim Levitsky <mlevitsk@...hat.com>
---
 arch/x86/kvm/mmu/mmu.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 9e3839971844..3080e25c8a3a 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -5675,13 +5675,17 @@ void kvm_zap_gfn_range(struct kvm *kvm, gfn_t gfn_start, gfn_t gfn_end)
 			}
 		}
 		if (flush)
-			kvm_flush_remote_tlbs_with_address(kvm, gfn_start, gfn_end);
+			kvm_flush_remote_tlbs_with_address(kvm, gfn_start,
+							   gfn_end - gfn_start);
 	}
 
 	if (is_tdp_mmu_enabled(kvm)) {
 		for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++)
 			flush = kvm_tdp_mmu_zap_gfn_range(kvm, i, gfn_start,
 							  gfn_end, flush);
+		if (flush)
+			kvm_flush_remote_tlbs_with_address(kvm, gfn_start,
+							   gfn_end - gfn_start);
 	}
 
 	if (flush)
-- 
2.26.3