This is a note to let you know that I've just added the patch titled
nouveau/tu102: flush all pdbs on vmm flush
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
nouveau-tu102-flush-all-pdbs-on-vmm-flush.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 520ad0f2075065930b40ccf470cdb37018745b10
Author: Dave Airlie <airlied@xxxxxxxxxx>
Date: Thu Nov 30 11:08:52 2023 +1000
nouveau/tu102: flush all pdbs on vmm flush
[ Upstream commit cb9c919364653eeafb49e7ff5cd32f1ad64063ac ]
This is a hack around a bug exposed with the GSP code, I'm not sure
what is happening exactly, but it appears some of our flushes don't
result in proper tlb invalidation for out BAR2 and we get a BAR2
fault from GSP and it all dies.
Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
Signed-off-by: Danilo Krummrich <dakr@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20231130010852.4034774-1-airlied@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmtu102.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmtu102.c
index be91cffc3b52..315000b2f8e3 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmtu102.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmtu102.c
@@ -32,7 +32,7 @@ tu102_vmm_flush(struct nvkm_vmm *vmm, int depth)
type = 0x00000001; /* PAGE_ALL */
if (atomic_read(&vmm->engref[NVKM_SUBDEV_BAR]))
- type |= 0x00000004; /* HUB_ONLY */
+ type |= 0x00000006; /* HUB_ONLY | ALL PDB (hack) */
mutex_lock(&subdev->mutex);
