From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A25B2606D824 for ; Fri, 6 Nov 2026 15:37:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=iJmP7UDg; dkim=pass (1024-bit key, unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss header.b=WX68Z5yL DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc: To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Unsubscribe-Post: List-Owner; bh=WbInPTtgeVQVaR+YtMP5Ieeyl2biDusMLIdL8tIaNf8=; b=iJmP7UDgkY3bUT cKyz83sd58VdyiF0gNzUTDHQ41sGZ9tECAytQXVRRRXXMtpnZnujc9Og3oM7/cCikHHsIJBT9sCG6 8tZL021Wr0yZ31Bhiekyo6M/zNFpLvihKlWqy9avYd0EfcYddcV5TFjOQolsZ0lt9VeveCVH7jvOn WKSiwfTg5KLuf8iH5hv3XlcjUVZf1/iliQZmnjZiuGSsgam85MDJisG5xpiZy0xuQguvsUqFLiFf2 GDEvYeZwPfX/RS5vbEQCF9TSE+dB+WYj48cygTRp4++rlJ5nPOI45COM40sJfwl/6Xz9VQGSWCQyl G0CmZunUKcY2DaL5nGuA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xPM0M-0000000Cr9I-20vm; Fri, 06 Nov 2026 15:37:26 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xPM0K-0000000Cr8J-1jhm for linux-arm-kernel@lists.infradead.org; Fri, 06 Nov 2026 15:37:26 +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 DEC4F1650; Fri, 6 Nov 2026 07:37:19 -0800 (PST) Received: from LeoBrasDK.cambridge.arm.com (LeoBrasDK.cambridge.arm.com [10.2.212.21]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 8047E3F632; Fri, 6 Nov 2026 07:37:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1793979442; bh=7EK+OV8cc6RynWDVsBo3aQX5rI+zXYDSLKEL403LmQM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WX68Z5yL6OyzNuu6ZywpIXZrFSwK9X2UJrdZ6ELbVJWB/Rx0VdMU5Rbmy0NZFI+PD m1eJazJZTMQLnD3Wv7gPUGVEW1c51bZ3fbQ9BWbBFFx622ozPIILzlDy0QQ8ZDBTKa ZKgMtPWWAQZ7ODXi1Gn2Q1+KL1k+y4WW/FQyfpNw= From: Leonardo Bras To: Tian Zheng Cc: Leonardo Bras , maz@kernel.org, oupton@kernel.org, catalin.marinas@arm.com, will@kernel.org, corbet@lwn.net, pbonzini@redhat.com, yuzenghui@huawei.com, wangzhou1@hisilicon.com, yangjinqian1@huawei.com, caijian11@h-partners.com, liuyonglong@huawei.com, tangchengchang@huawei.com, yezhenyu2@huawei.com, yubihong@huawei.com, linuxarm@huawei.com, joey.gouly@arm.com, kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, seiden@linux.ibm.com, suzuki.poulose@arm.com, fuad.tabba@linux.dev, mark.rutland@arm.com, seanjc@google.com, rdunlap@infradead.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, skhan@linuxfoundation.org Subject: Re: [PATCH v5 12/15] KVM: arm64: Derive the VM hardware dirty mode from dirty logging Date: Fri, 6 Nov 2026 15:37:14 +0000 Message-ID: X-Mailer: git-send-email 2.56.0 In-Reply-To: <191ab0e3-9913-4927-9f84-c861c8f3bcd5@huawei.com> References: <20260929103655.85107-1-zhengtian10@huawei.com> <20260929103655.85107-13-zhengtian10@huawei.com> <191ab0e3-9913-4927-9f84-c861c8f3bcd5@huawei.com> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261106_073724_500600_C8D296E5 X-CRM114-Status: GOOD ( 15.05 ) X-Spam-Score: -4.4 (----) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-8.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Fri, Nov 06, 2026 at 06:46:46PM +0800, Tian Zheng wrote: > > > On 11/2/2026 11:03 PM, Leonardo Bras wrote: > > On Tue, Sep 29, 2026 at 06:36:52PM +0800, Tian Zheng wrote: > > > Both HAFDBS and HDBSS flip VTCR_EL2.HD at memslot-update time. Two > > > independent toggles allow an intermediate HDBSS-set/HD-clear state, > > > an illegal combination, and need locking against concurrent updates. > > > > > > Replace both with kvm_arch_update_hw_dirty_mode(), a pure function > > > of the static capabilities and the number of logging memslots: > > > > > > - logging && HDBSS-capable -> HD|HA|HDBSS > > > - logging, no HDBSS -> off > > > - !logging && HAFDBS-cap. -> HD|HA > > > > This last one is gone now, so I guess most of this patch has to be > > reworked, right? > > > > Thanks! > > Leo > > Hi Leo, > > Yes, the last one is no longer needed as we discussed earlier in [1], so > I'll rework this patch. > Awesome, thanks! Leo