* [PATCH] drm/amdkfd: Only apply TLB flush optimization on ALdebaran
@ 2021-06-30 22:03 Eric Huang
2021-06-30 22:44 ` Felix Kuehling
0 siblings, 1 reply; 2+ messages in thread
From: Eric Huang @ 2021-06-30 22:03 UTC (permalink / raw)
To: amd-gfx; +Cc: Eric Huang
It is based on reverting two patches back.
drm/amdkfd: Make TLB flush conditional on mapping
drm/amdgpu: Add table_freed parameter to amdgpu_vm_bo_update
Signed-off-by: Eric Huang <jinhuieric.huang@amd.com>
---
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index cfaa5f88e630..f859ee7e8c13 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -1659,6 +1659,12 @@ static int kfd_ioctl_map_memory_to_gpu(struct file *filep,
goto sync_memory_failed;
}
+ /* Only apply no TLB flush on Aldebaran to
+ * workaround regressions on other Asics
+ */
+ if (dev->device_info->asic_family != CHIP_ALDEBARAN)
+ table_freed = true;
+
/* Flush TLBs after waiting for the page table updates to complete */
if (table_freed) {
for (i = 0; i < args->n_devices; i++) {
--
2.25.1
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^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] drm/amdkfd: Only apply TLB flush optimization on ALdebaran
2021-06-30 22:03 [PATCH] drm/amdkfd: Only apply TLB flush optimization on ALdebaran Eric Huang
@ 2021-06-30 22:44 ` Felix Kuehling
0 siblings, 0 replies; 2+ messages in thread
From: Felix Kuehling @ 2021-06-30 22:44 UTC (permalink / raw)
To: amd-gfx
On 2021-06-30 6:03 p.m., Eric Huang wrote:
> It is based on reverting two patches back.
> drm/amdkfd: Make TLB flush conditional on mapping
> drm/amdgpu: Add table_freed parameter to amdgpu_vm_bo_update
>
> Signed-off-by: Eric Huang <jinhuieric.huang@amd.com>
I'd prefer to put HW-specific workarounds in
amdgpu_amdkfd_gpuvm_map_memory_to_gpu.
Regards,
Felix
> ---
> drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
> index cfaa5f88e630..f859ee7e8c13 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
> @@ -1659,6 +1659,12 @@ static int kfd_ioctl_map_memory_to_gpu(struct file *filep,
> goto sync_memory_failed;
> }
>
> + /* Only apply no TLB flush on Aldebaran to
> + * workaround regressions on other Asics
> + */
> + if (dev->device_info->asic_family != CHIP_ALDEBARAN)
> + table_freed = true;
> +
> /* Flush TLBs after waiting for the page table updates to complete */
> if (table_freed) {
> for (i = 0; i < args->n_devices; i++) {
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2021-06-30 22:03 [PATCH] drm/amdkfd: Only apply TLB flush optimization on ALdebaran Eric Huang
2021-06-30 22:44 ` Felix Kuehling
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