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Mon, 18 Jan 2021 04:59:01 -0800 (PST) Received: from localhost ([211.108.35.36]) by smtp.gmail.com with ESMTPSA id w9sm15670166pfj.128.2021.01.18.04.59.00 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Mon, 18 Jan 2021 04:59:01 -0800 (PST) Date: Mon, 18 Jan 2021 21:58:59 +0900 From: Minwoo Im To: Klaus Jensen Subject: Re: [PATCH v2 10/12] hw/block/nvme: move cmb logic to v1.4 Message-ID: <20210118125859.GH18718@localhost.localdomain> References: <20210118094705.56772-1-its@irrelevant.dk> <20210118094705.56772-11-its@irrelevant.dk> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20210118094705.56772-11-its@irrelevant.dk> User-Agent: Mutt/1.11.4 (2019-03-13) Received-SPF: pass client-ip=2607:f8b0:4864:20::102f; envelope-from=minwoo.im.dev@gmail.com; helo=mail-pj1-x102f.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Fam Zheng , Kevin Wolf , Stefan Hajnoczi , qemu-block@nongnu.org, Klaus Jensen , qemu-devel@nongnu.org, Max Reitz , Padmakar Kalghatgi , Keith Busch Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Hello, On 21-01-18 10:47:03, Klaus Jensen wrote: > From: Padmakar Kalghatgi > > Implement v1.4 logic for configuring the Controller Memory Buffer. This > is not backward compatible with v1.3, so drivers that only support v1.3 > will not be able to use the CMB anymore. > > Signed-off-by: Padmakar Kalghatgi > Signed-off-by: Klaus Jensen Yes, CMB in v1.4 is not backward-compatible, but is it okay to move onto the CMB v1.4 from v1.3 without supporting the v1.3 usage on this device model?