diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2026-03-16 11:04:46 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-03-25 11:13:22 +0100 |
| commit | d73bf55bec76cf616e95fc10b6addc371c41d31a (patch) | |
| tree | cf57e6cab4b124a89c2af7a604fb34d0256bf7b3 /drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | |
| parent | f462624a6e4b5f1ec2664c2c53e408b2f4fb53e9 (diff) | |
drm/amdgpu: rework how we handle TLB fences
commit e9f58ff991dd4be13fd7a651bbf64329c090af09 upstream.
Add a new VM flag to indicate whether or not we need
a TLB fence. Userqs (KFD or KGD) require a TLB fence.
A TLB fence is not strictly required for kernel queues,
but it shouldn't hurt. That said, enabling this
unconditionally should be fine, but it seems to tickle
some issues in KIQ/MES. Only enable them for KFD,
or when KGD userq queues are enabled (currently via module
parameter).
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4798
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4749
Fixes: f3854e04b708 ("drm/amdgpu: attach tlb fence to the PTs update")
Cc: Christian König <christian.koenig@amd.com>
Cc: Prike Liang <Prike.Liang@amd.com>
Reviewed-by: Prike Liang <Prike.Liang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 69c5fbd2b93b5ced77c6e79afe83371bca84c788)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h index de53176a398d..d3edc92c7a12 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h @@ -440,6 +440,8 @@ struct amdgpu_vm { struct ttm_lru_bulk_move lru_bulk_move; /* Flag to indicate if VM is used for compute */ bool is_compute_context; + /* Flag to indicate if VM needs a TLB fence (KFD or KGD) */ + bool need_tlb_fence; /* Memory partition number, -1 means any partition */ int8_t mem_id; |