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Mon, 25 May 2026 23:58:24 -0700 (PDT) Date: Tue, 26 May 2026 06:58:22 +0000 In-Reply-To: <20260525164715.GA2487554@ziepe.ca> Mime-Version: 1.0 References: <20260525164715.GA2487554@ziepe.ca> X-Mailer: git-send-email 2.54.0.746.g67dd491aae-goog Message-ID: <20260526065822.914216-1-joonwonkang@google.com> Subject: Re: [PATCH v2] iommu: Allow device driver to use its own PASID space for SVA From: Joonwon Kang To: jgg@ziepe.ca Cc: Alexander.Grest@microsoft.com, alexander.shishkin@linux.intel.com, amhetre@nvidia.com, baolu.lu@linux.intel.com, bp@alien8.de, dave.hansen@linux.intel.com, easwar.hariharan@linux.microsoft.com, hpa@zytor.com, iommu@lists.linux.dev, jacob.jun.pan@linux.intel.com, joonwonkang@google.com, joro@8bytes.org, jpb@kernel.org, kas@kernel.org, kees@kernel.org, kevin.tian@intel.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, mingo@redhat.com, nicolinc@nvidia.com, peterz@infradead.org, praan@google.com, robin.murphy@arm.com, ryasuoka@redhat.com, smostafa@google.com, sohil.mehta@intel.com, tglx@kernel.org, will@kernel.org, x86@kernel.org, xin@zytor.com Content-Type: text/plain; charset="UTF-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260525_235827_117322_0C69EF36 X-CRM114-Status: GOOD ( 14.59 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org > On Mon, May 25, 2026 at 03:29:24PM +0000, Joonwon Kang wrote: > > > Currently, the only known expected user of the new kAPI is our team. Since > > I test if the patch resolves our problem before sending it, I believe it > > should be good enough. Do you mean more than our team by "accompanied > > users"? > > He means you cannot send patches like this that only serve OOT drivers > to the mainline kernel. Hmm, it gets back to the chicken-and-egg problem. So, do you recommend deferring the patch submission until we find a new in-tree user of the new kAPI? I believe we will not make our module in-tree anytime soon. Or, is it like I still can send the patch and get it reviewed although we cannot merge it to the mainline? Thanks, Joonwon Kang