From patchwork Fri Mar 9 22:15:03 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peng Hao X-Patchwork-Id: 10270635 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id EB85B60211 for ; Fri, 9 Mar 2018 14:03:04 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D620F2923C for ; Fri, 9 Mar 2018 14:03:04 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CADF129285; Fri, 9 Mar 2018 14:03:04 +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=0.0 required=2.0 tests=BAYES_00, DATE_IN_FUTURE_06_12, DKIM_SIGNED,DKIM_VALID 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 AC3952923C for ; Fri, 9 Mar 2018 14:03:03 +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:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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:In-Reply-To: References:List-Owner; bh=3fD6qT/oudWSjKyDkJ7rvbqgFdZGbLyiVJ/nID2RK84=; b=h6d a6f54igvY2RaDVwiwzYDvsTNbaPjZNWMzS70sPK12I79oGQLkTnSFzHcI5Hu4zXv+osS1WCrTEsOP RcjDj7SN9kwDpp/Wau3haX4teR6JnN2I3FSXRMjmc9JyVtXf2XvS9IrIW2LBo9iMo6rqQIFk9r8M2 lomOlhWD9ExYUbFSGPhdUdMy+ZQ5mP/nJ5/h3ghXrGgbJM1O67NEQqhI3SFrsSVxEfQ0WpcsUHjgu 2lBKcVOpr3tGoxeNVtoL8ho0E7N5Ni1jyW1APWTRTGwbrsqAc5Zj8oVIbzE0nMwBn7N78aA+DQXnM 6SqaJv5FYjXnnoXez+lQIFUgfJPNwPA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.89 #1 (Red Hat Linux)) id 1euIbo-0003NT-9R; Fri, 09 Mar 2018 14:02:56 +0000 Received: from out1.zte.com.cn ([202.103.147.172] helo=mxct.zte.com.cn) by bombadil.infradead.org with esmtps (Exim 4.89 #1 (Red Hat Linux)) id 1euIba-00030R-8B for linux-arm-kernel@lists.infradead.org; Fri, 09 Mar 2018 14:02:50 +0000 Received: from mse01.zte.com.cn (unknown [10.30.3.20]) by Forcepoint Email with ESMTPS id B83CE980D2E693179ED6; Fri, 9 Mar 2018 22:02:20 +0800 (CST) Received: from notes_smtp.zte.com.cn ([10.30.1.239]) by mse01.zte.com.cn with ESMTP id w29E2DAL042614; Fri, 9 Mar 2018 22:02:13 +0800 (GMT-8) (envelope-from peng.hao2@zte.com.cn) Received: from localhost.localdomain.localdomain ([10.74.120.59]) by szsmtp06.zte.com.cn (Lotus Domino Release 8.5.3FP6) with ESMTP id 2018030922022332-1467657 ; Fri, 9 Mar 2018 22:02:23 +0800 From: Peng Hao To: christoffer.dall@linaro.org, marc.zyngier@arm.com Subject: [PATCH] KVM:arm/arm64: dcache need be coherent unconditionally Date: Sat, 10 Mar 2018 06:15:03 +0800 Message-Id: <1520633703-15121-1-git-send-email-peng.hao2@zte.com.cn> X-Mailer: git-send-email 1.8.3.1 X-MIMETrack: Itemize by SMTP Server on SZSMTP06/server/zte_ltd(Release 8.5.3FP6|November 21, 2013) at 2018-03-09 22:02:23, Serialize by Router on notes_smtp/zte_ltd(Release 9.0.1FP7|August 17, 2016) at 2018-03-09 22:01:57, Serialize complete at 2018-03-09 22:01:57 X-MAIL: mse01.zte.com.cn w29E2DAL042614 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180309_060242_885877_C67666E9 X-CRM114-Status: UNSURE ( 7.56 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peng Hao , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org MIME-Version: 1.0 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 For emulation devices just like vga, keeping coherent dcache between guest and host timely is needed. Now the display of vnc-viewer will not update continuously and the patch can fix up. Signed-off-by: Peng Hao --- virt/kvm/arm/mmu.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c index ec62d1c..4a28395e 100644 --- a/virt/kvm/arm/mmu.c +++ b/virt/kvm/arm/mmu.c @@ -1416,8 +1416,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa, kvm_set_pfn_dirty(pfn); } - if (fault_status != FSC_PERM) - clean_dcache_guest_page(pfn, PMD_SIZE); + clean_dcache_guest_page(pfn, PMD_SIZE); if (exec_fault) { new_pmd = kvm_s2pmd_mkexec(new_pmd); @@ -1438,8 +1437,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa, mark_page_dirty(kvm, gfn); } - if (fault_status != FSC_PERM) - clean_dcache_guest_page(pfn, PAGE_SIZE); + clean_dcache_guest_page(pfn, PAGE_SIZE); if (exec_fault) { new_pte = kvm_s2pte_mkexec(new_pte);