From patchwork Thu Jul 25 15:35:39 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 11059125 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 7E13014DB for ; Thu, 25 Jul 2019 15:38:27 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6CC4B28877 for ; Thu, 25 Jul 2019 15:38:27 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 60A30288F4; Thu, 25 Jul 2019 15:38:27 +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 14CF328877 for ; Thu, 25 Jul 2019 15:38:27 +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=Rh/+9WB61w+Fwk3VCHq+LQeMU5nvQ42a4TBf3Ufq3b8=; b=fxvCnue8VgB5A1 fkFadpBC76Hgf2Kne0B9l5mIf/8WrY+71HQqJ7Cx3LxG0hl6exU8A16jUE5RfrTNUMFLEDE6KriHw 1QunC99AA7KM766Qk1JUTezzdAy8pjkS5BzIXqxKYleb+MkiLWeiewCdECvFTpMUFiIr6BOqbTotW Bnor66dYx5RprBLE2wqP6FCiPQvvWTsmtGyZAlHfnbCbu6X23Jb3FZT2GlA4iJgulQhjl6UDK3/dB 9Q2qOuniD+OhWTogl+wlEQS//1Ie+4Y13PZudh57cMXdDjZO6sP96vaqGke65FyAAAXKGWRwZe1GN FcU53JrNG+3nPZECsnPg==; 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 1hqfoy-0006CM-Iy; Thu, 25 Jul 2019 15:38:20 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hqfnJ-0004rQ-Ep for linux-arm-kernel@lists.infradead.org; Thu, 25 Jul 2019 15:36:38 +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 EF3E01684; Thu, 25 Jul 2019 08:36:36 -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 4B1B43F71A; Thu, 25 Jul 2019 08:36:35 -0700 (PDT) From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Subject: [PATCH v3 06/10] KVM: arm/arm64: vgic-its: Invalidate MSI-LPI translation cache on ITS disable Date: Thu, 25 Jul 2019 16:35:39 +0100 Message-Id: <20190725153543.24386-7-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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190725_083637_577105_9781EFA3 X-CRM114-Status: UNSURE ( 9.35 ) X-CRM114-Notice: Please train this message. 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 , Marc Zyngier , Andre Przywara , "Raslan, KarimAllah" , Christoffer Dall , Eric Auger , James Morse , "Saidi, Ali" , Zenghui Yu , Julien Thierry 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 From: Marc Zyngier If an ITS gets disabled, we need to make sure that further interrupts won't hit in the cache. For that, we invalidate the translation cache when the ITS is disabled. Signed-off-by: Marc Zyngier Reviewed-by: Eric Auger --- virt/kvm/arm/vgic/vgic-its.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c index 09a179820816..05406bd92ce9 100644 --- a/virt/kvm/arm/vgic/vgic-its.c +++ b/virt/kvm/arm/vgic/vgic-its.c @@ -1597,6 +1597,8 @@ static void vgic_mmio_write_its_ctlr(struct kvm *kvm, struct vgic_its *its, goto out; its->enabled = !!(val & GITS_CTLR_ENABLE); + if (!its->enabled) + vgic_its_invalidate_cache(kvm); /* * Try to process any pending commands. This function bails out early