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AJvYcCUSGDP8uuFhcB//XXpkI2EQTd+0ycLOH6V9qcyDguYp2H/6bNx21Gem2ya9y2RDMwz40PqKpS6wrpSjEn8=@vger.kernel.org X-Gm-Message-State: AOJu0Yx0KHLhxUFg+czCu71Z50ydLwULqzjxPUbWRtfbKY3bQF8AXN1L h7lzZTNseFSwjqidhIB+ZkPThedBPC9w8rszG8w6R0DTfgSH1bHE4IkLn3R6Ycpo2L44XyFLx+F 8+iEvgw== X-Google-Smtp-Source: AGHT+IF9lRdjIaJMGffmVpoig7dkM1EZi9TG7goqvwtOE+A6AKDHS0ehZiZ8FiJ1CPYjTylPsun8hRe7S+Y= X-Received: from pjbpv3.prod.google.com ([2002:a17:90b:3c83:b0:2fe:800f:23a]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90a:d406:b0:2fa:1e56:5d82 with SMTP id 98e67ed59e1d1-313bfdcc12emr1459552a91.17.1749682017517; Wed, 11 Jun 2025 15:46:57 -0700 (PDT) Reply-To: Sean Christopherson Date: Wed, 11 Jun 2025 15:45:04 -0700 In-Reply-To: <20250611224604.313496-2-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250611224604.313496-2-seanjc@google.com> X-Mailer: git-send-email 2.50.0.rc1.591.g9c95f17f64-goog Message-ID: <20250611224604.313496-3-seanjc@google.com> Subject: [PATCH v3 01/62] KVM: arm64: Explicitly treat routing entry type changes as changes From: Sean Christopherson To: Marc Zyngier , Oliver Upton , Sean Christopherson , Paolo Bonzini , Joerg Roedel , David Woodhouse , Lu Baolu Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, kvm@vger.kernel.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, Sairaj Kodilkar , Vasant Hegde , Maxim Levitsky , Joao Martins , Francesco Lavra , David Matlack Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Explicitly treat type differences as GSI routing changes, as comparing MSI data between two entries could get a false negative, e.g. if userspace changed the type but left the type-specific data as- Note, the same bug was fixed in x86 by commit bcda70c56f3e ("KVM: x86: Explicitly treat routing entry type changes as changes"). Fixes: 4bf3693d36af ("KVM: arm64: Unmap vLPIs affected by changes to GSI ro= uting information") Signed-off-by: Sean Christopherson Reviewed-by: Oliver Upton --- arch/arm64/kvm/arm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index de2b4e9c9f9f..38a91bb5d4c7 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -2764,7 +2764,8 @@ void kvm_arch_irq_bypass_del_producer(struct irq_bypa= ss_consumer *cons, bool kvm_arch_irqfd_route_changed(struct kvm_kernel_irq_routing_entry *old, struct kvm_kernel_irq_routing_entry *new) { - if (new->type !=3D KVM_IRQ_ROUTING_MSI) + if (old->type !=3D KVM_IRQ_ROUTING_MSI || + new->type !=3D KVM_IRQ_ROUTING_MSI) return true; =20 return memcmp(&old->msi, &new->msi, sizeof(new->msi)); --=20 2.50.0.rc1.591.g9c95f17f64-goog