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Fri, 05 Jul 2024 00:28:59 -0400 Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1sPaZC-0003Zy-GF for bug-guix@gnu.org; Fri, 05 Jul 2024 00:29:02 -0400 X-Loop: help-debbugs@gnu.org Subject: bug#55907: VFIO kernel module fails to capture PCI device References: In-Reply-To: Resent-From: Nikola =?UTF-8?Q?Brkovi=C4=87?= Original-Sender: "Debbugs-submit" Resent-CC: bug-guix@gnu.org Resent-Date: Fri, 05 Jul 2024 04:29:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 55907 X-GNU-PR-Package: guix X-GNU-PR-Keywords: To: "55907@debbugs.gnu.org" <55907@debbugs.gnu.org> Received: via spool by 55907-submit@debbugs.gnu.org id=B55907.172015373613742 (code B ref 55907); Fri, 05 Jul 2024 04:29:02 +0000 Received: (at 55907) by debbugs.gnu.org; 5 Jul 2024 04:28:56 +0000 Received: from localhost ([127.0.0.1]:43349 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1sPaZ5-0003ZY-E3 for submit@debbugs.gnu.org; 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charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Mailman-Approved-At: Fri, 05 Jul 2024 00:28:54 -0400 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-Mailman-Approved-At: Sat, 06 Jul 2024 17:53:37 -0400 X-BeenThere: bug-guix@gnu.org List-Id: Bug reports for GNU Guix List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-to: Nikola =?UTF-8?Q?Brkovi=C4=87?= From: Nikola =?UTF-8?Q?Brkovi=C4=87?= via Bug reports for GNU Guix Errors-To: bug-guix-bounces+larch=yhetil.org@gnu.org Sender: bug-guix-bounces+larch=yhetil.org@gnu.org X-Migadu-Flow: FLOW_IN X-Migadu-Country: US X-Migadu-Spam-Score: -2.89 X-Spam-Score: -2.89 X-Migadu-Queue-Id: E97B971506 X-Migadu-Scanner: mx11.migadu.com X-TUID: 35h/2pTf5AGk I have managed to get VFIO working by creating a service of boot-service-ty= pe which overrides the GPU driver with vfio-pci and binds the GPU to VFIO: >(simple-service 'vfio-override=C2=A0boot-service-type >=C2=A0 =C2=A0 '(and (call-with-output-file "/sys/bus/pci/devices/0000:04:0= 0.0/driver_override" >=C2=A0 =C2=A0 (lambda (p) >=C2=A0 =C2=A0 =C2=A0 (display "vfio-pci" p))) >=C2=A0 (call-with-output-file "/sys/bus/pci/drivers/vfio-pci/new_id" >=C2=A0 =C2=A0 (lambda (p) >=C2=A0 =C2=A0 =C2=A0 (display "1002 665f" p))) >=C2=A0 ) >) Sorry for the hard-coded IDs, you should replace them with your own. You mi= ght need to unbind the GPU's audio card from its driver as well, after you'= re fully booted. QEMU will refuse to pass-through the GPU if the audio card= is in the same IOMMU group and not using vfio-pci. In my case, the service runs early enough in the boot process where amdgpu = has not initialized the GPU yet. There might be a better way to accomplish = this, I'm still new to Guix and Scheme. Thanks, Nikola