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Tsirkin" , "Marcel Apfelbaum" , "Peter Xu" , "Fabiano Rosas" , Subject: Re: [PATCH V6 06/21] backends/iommufd: change process ioctl From: "Landon Clipp" To: "Steve Sistare" , X-Mailer: aerc 0.21.0 References: <1751493538-202042-1-git-send-email-steven.sistare@oracle.com> <1751493538-202042-7-git-send-email-steven.sistare@oracle.com> In-Reply-To: <1751493538-202042-7-git-send-email-steven.sistare@oracle.com> Received-SPF: pass client-ip=2607:f8b0:4864:20::1330; envelope-from=landonclipp@gmail.com; helo=mail-dy1-x1330.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: 2.1.29 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 Hello, I'm running Linux 6.8.12 and when running QEMU 10.1 or above, it segfaults = when submitting the IOMMU_IOAS_CHANGE_PROCESS ioctl which is not supported on my kernel. Here is an example strace: 3388260 22:48:30.540879 openat(AT_FDCWD, "/dev/iommu", O_RDWR|O_CLOEXEC) = =3D 25=20 3388260 22:48:30.540942 ioctl(25, IOMMU_IOAS_CHANGE_PROCESS, 0x7ffe91d96490= ) =3D -1 ENOTTY (Inappropriate ioctl for device) 3388260 22:48:30.541003 close(25) =3D 0 3388260 22:48:30.541059 close(26) =3D 0 3388260 22:48:30.541120 --- SIGSEGV {si_signo=3DSIGSEGV, si_code=3DSEGV_MAP= ERR, si_addr=3DNULL} --- I heard through the grapevine that this is a known issue and was fixed. My question is what QEMU version should I expect this fix to land and roughly = what the timeframe for it is (assuming it hasn't been landed already)? Landon Clipp