x27;s easier to mask problem.
Regards,
Jack
-Original Message-
From: Koenig, Christian
Sent: Tuesday, August 28, 2018 2:46 PM
To: Xiao, Jack ; Kuehling, Felix
; Christian König
; amd-gfx@lists.freedesktop.org
Subject: Re: [PATCH 01/10] drm/amdgpu: use only the lower address
space on GMC
;
amd-gfx@lists.freedesktop.org
Subject: Re: [PATCH 01/10] drm/amdgpu: use only the lower address space on GMC9
Completely agree with Felix here.
It makes system memory access slightly simpler, but I would say that you
accidentally corrupt the GART table and that you accidentally corrupt the the
al Message-
From: Koenig, Christian
Sent: Tuesday, August 28, 2018 2:46 PM
To: Xiao, Jack ; Kuehling, Felix
; Christian König
; amd-gfx@lists.freedesktop.org
Subject: Re: [PATCH 01/10] drm/amdgpu: use only the lower address
space on GMC9
This series patches seems to make AGP aperture allowed to
, but I guess the overhead
is little.
Regards,
Jack
-Original Message-
From: Christian König
Sent: Tuesday, August 28, 2018 7:42 PM
To: Xiao, Jack ; Koenig, Christian
; Kuehling, Felix ;
amd-gfx@lists.freedesktop.org
Subject: Re: [PATCH 01/10] drm/amdgpu: use only the lower address sp
ithout explicit claiming, it's easier to mask problem.
>>
>> Regards,
>> Jack
>>
>> -Original Message-
>> From: Koenig, Christian
>> Sent: Tuesday, August 28, 2018 2:46 PM
>> To: Xiao, Jack ; Kuehling, Felix
>> ; Christian König
>>
On 2018-08-28 02:53 AM, Christian König wrote:
> Am 28.08.2018 um 06:21 schrieb zhoucm1:
>>
>>
>> On 2018年08月28日 03:03, Felix Kuehling wrote:
>>> The point of this series seems to be to allow access to small system
>>> memory BOs (one page) without a GART mapping. I'm guessing that reduces
>>> pres
hling, Felix ;
Christian König ; amd-gfx@lists.freedesktop.org
Subject: Re: [PATCH 01/10] drm/amdgpu: use only the lower address space on GMC9
This series patches seems to make AGP aperture allowed to access any system
memory (16GB) bypass GPU VM protection.
The system aperture should only be a
d-gfx@lists.freedesktop.org
Subject: Re: [PATCH 01/10] drm/amdgpu: use only the lower address space on GMC9
> This series patches seems to make AGP aperture allowed to access any system
> memory (16GB) bypass GPU VM protection.
The system aperture should only be active in the system domain, o
Am 28.08.2018 um 06:21 schrieb zhoucm1:
On 2018年08月28日 03:03, Felix Kuehling wrote:
The point of this series seems to be to allow access to small system
memory BOs (one page) without a GART mapping. I'm guessing that reduces
pressure on the GART and removes the need for HDP and TLB flushes.
I
?
Regards,
Jack
-Original Message-
From: amd-gfx On Behalf Of Felix
Kuehling
Sent: Tuesday, August 28, 2018 3:03 AM
To: Christian König ;
amd-gfx@lists.freedesktop.org; Koenig, Christian
Subject: Re: [PATCH 01/10] drm/amdgpu: use only the lower address space on GMC9
The point of this
.
Is it worth doing this, but exposing risk?
Regards,
Jack
-Original Message-
From: amd-gfx On Behalf Of Felix
Kuehling
Sent: Tuesday, August 28, 2018 3:03 AM
To: Christian König ;
amd-gfx@lists.freedesktop.org; Koenig, Christian
Subject: Re: [PATCH 01/10] drm/amdgpu: use only the lower
On 2018年08月28日 03:03, Felix Kuehling wrote:
The point of this series seems to be to allow access to small system
memory BOs (one page) without a GART mapping. I'm guessing that reduces
pressure on the GART and removes the need for HDP and TLB flushes.
I think if adding these explain/reason to c
On 08/28/2018 09:56 AM, Zhang, Jerry (Junwei) wrote:
On 08/28/2018 12:53 AM, Christian König wrote:
Only use the lower address space on GMC9 for the system domain.
Otherwise we would need to sign extend GMC addresses.
Signed-off-by: Christian König
---
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c |
On 08/28/2018 12:53 AM, Christian König wrote:
Only use the lower address space on GMC9 for the system domain.
Otherwise we would need to sign extend GMC addresses.
Signed-off-by: Christian König
---
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 7 +++
1 file changed, 3 insertions(+), 4 deleti
The point of this series seems to be to allow access to small system
memory BOs (one page) without a GART mapping. I'm guessing that reduces
pressure on the GART and removes the need for HDP and TLB flushes. Why
does Patch 10 only enable that on GFXv9? Is there less benefit on older
chips?
Is this
On Mon, Aug 27, 2018 at 12:56 PM Christian König
wrote:
>
> Only use the lower address space on GMC9 for the system domain.
> Otherwise we would need to sign extend GMC addresses.
>
> Signed-off-by: Christian König
> ---
> drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 7 +++
> 1 file changed, 3 in
Only use the lower address space on GMC9 for the system domain.
Otherwise we would need to sign extend GMC addresses.
Signed-off-by: Christian König
---
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 7 +++
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc
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