Date: Tue, 16 Jun 2026 10:47:01 -0500 From: Matthew Grooms <mgrooms@shrew.net> To: virtualization@freebsd.org Subject: =?UTF-8?Q?Re=3A_**=5BHelp=5D_bhyve=3A_bootrom=5Falloc=3A_vm=5Fmmap?= =?UTF-8?Q?=5Fmapseg=3A_Invalid_argument_=E2=80=94_NVIDIA_passthrough_with_C?= =?UTF-8?Q?orvin=27s_branch_on_FreeBSD_15=2E0**?= Message-ID: <381ad530-f921-496d-b636-14ad28aa1e2d@shrew.net> In-Reply-To: <c55fa3d6d59284260d19064c25f66c4bcb385ef7.camel@FreeBSD.org> References: <CA%2B1FSiiGdW4JCi=XA68Wtr1pDbMNAwTpwq9P8TixdDGRHSf%2B6g@mail.gmail.com> <bc674b3f2815204306480f88f71b48ff886c8a56.camel@FreeBSD.org> <1bbf28a7-7025-4d83-937d-72d8583048ca@shrew.net> <c55fa3d6d59284260d19064c25f66c4bcb385ef7.camel@FreeBSD.org>
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Thanks Corvin. The passthrough feature appears to be working well. I appreciate the time and effort you've put into this. Once passed, I can use the device in a Debian 13 guest to execute cuda workloads. There do appear to be a few issues: 1) The nvidia device is always claimed as the primary GPU by the guest. 2) The guest hangs on shutdown and/or reboot. This only happens when the GPU is passed through. The first issue prevents me from performing a device reset if the GPU gets wedged in a CUDA operation. Reboot required. The second issue prevents a clean reboot ( always a dirty FS at startup ). Any ideas how to force UEFI to prefer the virtual frame buffer device? I've tried everything I can think of but no luck so far. Thanks again, -Matthew On 6/8/26 01:39, Corvin Köhne wrote: > On Fri, 2026-06-05 at 11:20 -0500, Matthew Grooms wrote: >> On 6/5/26 01:34, Corvin Köhne wrote: >>> On Thu, 2026-06-04 at 13:23 +0200, Mario Marietto wrote: >>>> Hi everyone, >>>> I'm trying to get NVIDIA GPU passthrough working with bhyve on FreeBSD >>>> 15.0- >>>> RELEASE-p5, using Corvin Köhne's nvidia-wip branch: >>>> >>>> https://github.com/Beckhoff/freebsd-src/tree/phab/corvink/15.0/nvidia-wip >>>> The VM fails to start with the following error before the guest even >>>> boots: >>>> bhyve: bootrom_alloc: vm_mmap_mapseg: Invalid argument >>> NVIDIA GPU passthrough should work with stock 15.0, no patches required. >> I was about to attempt this myself. Are all the required patches present >> in 14.4 as well? >> >> Thanks, >> >> -Matthew >> > Yes, the required patch is present in 14.4 as well. > >home | help
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