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Tsirkin" , John Snow , "Denis V. Lunev" , qemu-block@nongnu.org, Pierrick Bouvier , Viresh Kumar Subject: Re: [PATCH v2 0/4] RME-DA preparatory work Message-ID: References: <20260904-jmac-rme-da-prep-v2-0-fb461d78bbb2@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260904-jmac-rme-da-prep-v2-0-fb461d78bbb2@linaro.org> Received-SPF: pass client-ip=2a00:1450:4864:33::2a; envelope-from=jim.macarthur@linaro.org; helo=mail-ed2-x2a.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, 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: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Fri, Sep 04, 2026 at 05:05:00PM +0100, Jim MacArthur wrote: > This is a subset of patches from Gustavo Romero's SMMU DA branch work, > featuring patches from Pierrick Bouvier and Viresh Kumar. These add > capabilities to the PCIe root port and ICH9 SATA driver, and also refactor > some code in hw/pci/msi.c for future use. > > The goal here is to upstream work which is independent of Tao Tang's SMMU-V3 > patches, while those are being reviewed. If/when Tao Tang's patches are > accepted, we can proceed with the remainder of the SMMU DA work. > > I have spent some time understanding these patches and believe them to be > sensible, but some parts of them may be outside my understanding. In > particular, we may be incorrectly advertising features here which are not > actually implemented; although this doesn't cause any problems I can see > with Linux or our test suites, I can quite easily set the feature flags to > zero and keep the code structure if that's a problem. > > Jim > > Signed-off-by: Jim MacArthur > --- > Changes in v2: > - Removed RFC tag, rebased to current master. No other changes. > - Link to v1: https://lore.kernel.org/qemu-devel/20260818-jmac-rme-da-prep-v1-0-30fab951bc75@linaro.org > Thanks to Michael and Phillipe for reviewing this - it clearly needs more documentation on it; I'll have a new version up with better explanations shortly. Jim