[PATCH AUTOSEL 6.17] vfio/nvgrace-gpu: Add GB300 SKU to the devid table

[Sasha Levin <sashal@kernel.org>]

From: Tushar Dave <tdave@nvidia.com>

[ Upstream commit 407aa63018d15c35a34938633868e61174d2ef6e ]

GB300 is NVIDIA's Grace Blackwell Ultra Superchip.

Add the GB300 SKU device-id to nvgrace_gpu_vfio_pci_table.

Signed-off-by: Tushar Dave <tdave@nvidia.com>
Reviewed-by: Ankit Agrawal <ankita@nvidia.com>
Link: https://lore.kernel.org/r/20250925170935.121587-1-tdave@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

LLM Generated explanations, may be completely bogus:

YES – this backports cleanly and only extends the VFIO NVGrace device-id
table (`drivers/vfio/pci/nvgrace-gpu/main.c:998-1000`) with the GB300
identifier `0x31C2`, mirroring prior entries for GH200/GB200 SKUs.
Without the entry, the GB300 parts simply fail to bind to
`nvgrace_gpu_vfio_pci_driver`, blocking VFIO passthrough for shipped
hardware and forcing users to carry out-of-tree patches; adding the ID
fixes that functional gap without touching probe/remove logic
(`…/main.c:934-979`) or altering any other code paths. I found no
auxiliary references to `0x31C2`, so the existing mature infrastructure
for Grace/Blackwell devices automatically handles the new SKU. The
change is self-contained, risk-free to existing platforms, and aligns
with the stable policy of accepting simple device-id updates that enable
supported hardware.

Next step: run a brief VFIO probe bind test on GB300 hardware to confirm
the new table entry succeeds.

 drivers/vfio/pci/nvgrace-gpu/main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/vfio/pci/nvgrace-gpu/main.c b/drivers/vfio/pci/nvgrace-gpu/main.c
index d95761dcdd58c..36b79713fd5a5 100644
--- a/drivers/vfio/pci/nvgrace-gpu/main.c
+++ b/drivers/vfio/pci/nvgrace-gpu/main.c
@@ -995,6 +995,8 @@ static const struct pci_device_id nvgrace_gpu_vfio_pci_table[] = {
 	{ PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_NVIDIA, 0x2348) },
 	/* GB200 SKU */
 	{ PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_NVIDIA, 0x2941) },
+	/* GB300 SKU */
+	{ PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_NVIDIA, 0x31C2) },
 	{}
 };
 
-- 
2.51.0