From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.0 required=3.0 tests=INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5571CC7618B for ; Thu, 25 Jul 2019 15:36:40 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 1CB0022BF5 for ; Thu, 25 Jul 2019 15:36:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1CB0022BF5 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id B6EE94A612; Thu, 25 Jul 2019 11:36:39 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id T-dDX5lQvkDL; Thu, 25 Jul 2019 11:36:38 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 0F8444A600; Thu, 25 Jul 2019 11:36:37 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 3F1FE4A5D9 for ; Thu, 25 Jul 2019 11:36:36 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id vPfBO6+xWZBY for ; Thu, 25 Jul 2019 11:36:35 -0400 (EDT) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 7610A4A5EE for ; Thu, 25 Jul 2019 11:36:33 -0400 (EDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 2EA0E1597; Thu, 25 Jul 2019 08:36:33 -0700 (PDT) Received: from filthy-habits.cambridge.arm.com (filthy-habits.cambridge.arm.com [10.1.197.61]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 7E7C13F71A; Thu, 25 Jul 2019 08:36:31 -0700 (PDT) From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Subject: [PATCH v3 04/10] KVM: arm/arm64: vgic-its: Invalidate MSI-LPI translation cache on specific commands Date: Thu, 25 Jul 2019 16:35:37 +0100 Message-Id: <20190725153543.24386-5-maz@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190725153543.24386-1-maz@kernel.org> References: <20190725153543.24386-1-maz@kernel.org> MIME-Version: 1.0 Cc: Marc Zyngier , Andre Przywara , "Raslan, KarimAllah" , "Saidi, Ali" X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu From: Marc Zyngier The LPI translation cache needs to be discarded when an ITS command may affect the translation of an LPI (DISCARD, MAPC and MAPD with V=0) or the routing of an LPI to a redistributor with disabled LPIs (MOVI, MOVALL). We decide to perform a full invalidation of the cache, irrespective of the LPI that is affected. Commands are supposed to be rare enough that it doesn't matter. Reviewed-by: Eric Auger Signed-off-by: Marc Zyngier --- virt/kvm/arm/vgic/vgic-its.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c index cc6b5e49a312..09a179820816 100644 --- a/virt/kvm/arm/vgic/vgic-its.c +++ b/virt/kvm/arm/vgic/vgic-its.c @@ -722,6 +722,8 @@ static int vgic_its_cmd_handle_discard(struct kvm *kvm, struct vgic_its *its, * don't bother here since we clear the ITTE anyway and the * pending state is a property of the ITTE struct. */ + vgic_its_invalidate_cache(kvm); + its_free_ite(kvm, ite); return 0; } @@ -757,6 +759,8 @@ static int vgic_its_cmd_handle_movi(struct kvm *kvm, struct vgic_its *its, ite->collection = collection; vcpu = kvm_get_vcpu(kvm, collection->target_addr); + vgic_its_invalidate_cache(kvm); + return update_affinity(ite->irq, vcpu); } @@ -985,6 +989,8 @@ static void vgic_its_free_device(struct kvm *kvm, struct its_device *device) list_for_each_entry_safe(ite, temp, &device->itt_head, ite_list) its_free_ite(kvm, ite); + vgic_its_invalidate_cache(kvm); + list_del(&device->dev_list); kfree(device); } @@ -1090,6 +1096,7 @@ static int vgic_its_cmd_handle_mapc(struct kvm *kvm, struct vgic_its *its, if (!valid) { vgic_its_free_collection(its, coll_id); + vgic_its_invalidate_cache(kvm); } else { collection = find_collection(its, coll_id); @@ -1238,6 +1245,8 @@ static int vgic_its_cmd_handle_movall(struct kvm *kvm, struct vgic_its *its, vgic_put_irq(kvm, irq); } + vgic_its_invalidate_cache(kvm); + kfree(intids); return 0; } -- 2.20.1 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm