From patchwork Tue Jun 11 17:03:32 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 10987877 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DE60B14DB for ; Tue, 11 Jun 2019 17:05:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C708C20174 for ; Tue, 11 Jun 2019 17:05:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B99992846D; Tue, 11 Jun 2019 17:05:36 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 6A8B320174 for ; Tue, 11 Jun 2019 17:05:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=qzU8Rpk8nW8zFXbVDZawJwBgBX1FXc9zaQ3Bgn69kLs=; b=pbEnL3QsZe5rNI yxO93QRlXpSmPlHuor3SJsL2F+6qqr+whCvyL2sh/gfYMbdE1+b3V9DOjID0r468PmFZXR090Ku92 ppPIXKy6J6JiB0QEbbcENOqAIZNz+jq2EBpQQuLpJbLuZydkdWxcSCE/jS58rRS6TEJYTfD8Hz2GI M8uvnteAn7pgPfMhHmbEyYkM7Vdg88SF53bnLH3cvfIBqIjXJMxIBkYd7UqHpeFwJHldrey06ExNL hRmuDzK79RgbEJfPbJmR7wGO3NZjZB6RCOIqgbcJi66e4Lu+krIIF7aiYgBjn2doyRJBJYArwjY67 63wQCt4vHOcXC3HjLT7Q==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hakDC-00037N-1k; Tue, 11 Jun 2019 17:05:30 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hakBg-0000c9-Dz for linux-arm-kernel@lists.infradead.org; Tue, 11 Jun 2019 17:03:57 +0000 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 1DBD1EBD; Tue, 11 Jun 2019 10:03:56 -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 A30143F73C; Tue, 11 Jun 2019 10:03:54 -0700 (PDT) From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Subject: [PATCH v2 5/9] KVM: arm/arm64: vgic-its: Invalidate MSI-LPI translation cache on disabling LPIs Date: Tue, 11 Jun 2019 18:03:32 +0100 Message-Id: <20190611170336.121706-6-marc.zyngier@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190611170336.121706-1-marc.zyngier@arm.com> References: <20190611170336.121706-1-marc.zyngier@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190611_100356_586342_175670FB X-CRM114-Status: GOOD ( 10.68 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Suzuki K Poulose , "Raslan, KarimAllah" , Julien Thierry , Christoffer Dall , Eric Auger , James Morse , Zenghui Yu , "Saidi, Ali" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP If a vcpu disables LPIs at its redistributor level, we need to make sure we won't pend more interrupts. For this, we need to invalidate the LPI translation cache. Signed-off-by: Marc Zyngier Reviewed-by: Eric Auger --- virt/kvm/arm/vgic/vgic-mmio-v3.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c b/virt/kvm/arm/vgic/vgic-mmio-v3.c index 936962abc38d..cb60da48810d 100644 --- a/virt/kvm/arm/vgic/vgic-mmio-v3.c +++ b/virt/kvm/arm/vgic/vgic-mmio-v3.c @@ -192,8 +192,10 @@ static void vgic_mmio_write_v3r_ctlr(struct kvm_vcpu *vcpu, vgic_cpu->lpis_enabled = val & GICR_CTLR_ENABLE_LPIS; - if (was_enabled && !vgic_cpu->lpis_enabled) + if (was_enabled && !vgic_cpu->lpis_enabled) { vgic_flush_pending_lpis(vcpu); + vgic_its_invalidate_cache(vcpu->kvm); + } if (!was_enabled && vgic_cpu->lpis_enabled) vgic_enable_lpis(vcpu);