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=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 65587C433E2 for ; Thu, 2 Jul 2020 13:57:14 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 27FA220772 for ; Thu, 2 Jul 2020 13:57:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 27FA220772 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com 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 D64344B589; Thu, 2 Jul 2020 09:57:13 -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 thBgngZwQi-a; Thu, 2 Jul 2020 09:57:12 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id C5A8C4B602; Thu, 2 Jul 2020 09:57:11 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id E14C54B589 for ; Thu, 2 Jul 2020 09:57:10 -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 aDO++8CVcoul for ; Thu, 2 Jul 2020 09:57:10 -0400 (EDT) Received: from huawei.com (szxga04-in.huawei.com [45.249.212.190]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id DA3154B48F for ; Thu, 2 Jul 2020 09:57:09 -0400 (EDT) Received: from DGGEMS406-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 8000126C23D4911ADAAC; Thu, 2 Jul 2020 21:56:10 +0800 (CST) Received: from DESKTOP-5IS4806.china.huawei.com (10.174.187.22) by DGGEMS406-HUB.china.huawei.com (10.3.19.206) with Microsoft SMTP Server id 14.3.487.0; Thu, 2 Jul 2020 21:56:01 +0800 From: Keqian Zhu To: , , , Subject: [PATCH v2 1/8] KVM: arm64: Set DBM bit for writable PTEs Date: Thu, 2 Jul 2020 21:55:49 +0800 Message-ID: <20200702135556.36896-2-zhukeqian1@huawei.com> X-Mailer: git-send-email 2.8.4.windows.1 In-Reply-To: <20200702135556.36896-1-zhukeqian1@huawei.com> References: <20200702135556.36896-1-zhukeqian1@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.187.22] X-CFilter-Loop: Reflected Cc: Catalin Marinas , Sean Christopherson , Steven Price , liangpeng10@huawei.com, Alexios Zavras , Mark Brown , Marc Zyngier , Thomas Gleixner , Will Deacon , Andrew Morton 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 DBM bit is used by MMU to differentiate a genuinely non-writable page from a page that is only temporarily non-writable in order to mark dirty. Signed-off-by: Keqian Zhu Signed-off-by: Peng Liang --- arch/arm64/include/asm/kvm_mmu.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h index b12bfc1f051a..2700442b0f75 100644 --- a/arch/arm64/include/asm/kvm_mmu.h +++ b/arch/arm64/include/asm/kvm_mmu.h @@ -169,6 +169,10 @@ void kvm_clear_hyp_idmap(void); static inline pte_t kvm_s2pte_mkwrite(pte_t pte) { pte_val(pte) |= PTE_S2_RDWR; + + if (IS_ENABLED(CONFIG_ARM64_HW_AFDBM)) + pte_val(pte) |= PTE_DBM; + return pte; } -- 2.19.1 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm