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From: "Christian König" <ckoenig.leichtzumerken@gmail.com>
To: "Luo, Zhigang" <Zhigang.Luo@amd.com>,
	"Deng, Emily" <Emily.Deng@amd.com>,
	 "Liu, Shaoyun" <Shaoyun.Liu@amd.com>,
	"amd-gfx@lists.freedesktop.org" <amd-gfx@lists.freedesktop.org>
Subject: Re: [PATCH 1/5] drm/amdgpu: remove sriov vf checking from getting fb location
Date: Fri, 4 Jun 2021 15:46:14 +0200	[thread overview]
Message-ID: <0126c234-be22-f615-d9ad-c671e615cb37@gmail.com> (raw)
In-Reply-To: <BL1PR12MB531733CB397DBB9AF12C13FBF13B9@BL1PR12MB5317.namprd12.prod.outlook.com>

Well, but are you the one defining the compatibility policy?

See usually Linux kernel code compatibility policy is that existing 
stuff needs to work forever.

We could argue a bit that the hypervisor components are not open source 
nor uAPI, but that argument is rather thin.

Christian.

Am 04.06.21 um 15:23 schrieb Luo, Zhigang:
> [AMD Official Use Only]
>
> Here is our hypervisor driver compatibility policy:
>          - Host.y supports Guest.y-1, Guest.y, Guest.y+1
>          - Guest.y supported by Host.y-1, Host.y,Host.y+1
>
> Host driver had the feature for gfx9 2 years ago. So, this change meet our compatibility policy.
>
> Thanks,
> Zhigang
>
> -----Original Message-----
> From: Christian König <ckoenig.leichtzumerken@gmail.com>
> Sent: June 4, 2021 7:14 AM
> To: Deng, Emily <Emily.Deng@amd.com>; Liu, Shaoyun <Shaoyun.Liu@amd.com>; Luo, Zhigang <Zhigang.Luo@amd.com>; amd-gfx@lists.freedesktop.org
> Subject: Re: [PATCH 1/5] drm/amdgpu: remove sriov vf checking from getting fb location
>
> I was just about to question the same thing.
>
> It looks really good to me to have that cleaned up, but if this breaks with older versions of the hypervisor then it is a bit questionable change.
>
> Regards,
> Christian.
>
> Am 04.06.21 um 03:13 schrieb Deng, Emily:
>> Do we need to consider backward compatibility?
>>
>>
>> Best wishes
>> Emily Deng
>>
>>
>>> -----Original Message-----
>>> From: amd-gfx <amd-gfx-bounces@lists.freedesktop.org> On Behalf Of
>>> Liu, Shaoyun
>>> Sent: Thursday, June 3, 2021 11:10 PM
>>> To: Luo, Zhigang <Zhigang.Luo@amd.com>; amd-gfx@lists.freedesktop.org
>>> Cc: Luo, Zhigang <Zhigang.Luo@amd.com>
>>> Subject: RE: [PATCH 1/5] drm/amdgpu: remove sriov vf checking from
>>> getting fb location
>>>
>>> [AMD Official Use Only]
>>>
>>> Looks ok to me .
>>>
>>> Reviewed-By : Shaoyun.liu <shaoyunl@amd.com>
>>>
>>> -----Original Message-----
>>> From: amd-gfx <amd-gfx-bounces@lists.freedesktop.org> On Behalf Of
>>> Zhigang Luo
>>> Sent: Thursday, June 3, 2021 10:13 AM
>>> To: amd-gfx@lists.freedesktop.org
>>> Cc: Luo, Zhigang <Zhigang.Luo@amd.com>
>>> Subject: [PATCH 1/5] drm/amdgpu: remove sriov vf checking from
>>> getting fb location
>>>
>>> host driver programmed fb location registers for vf, no need to check anymore.
>>>
>>> Signed-off-by: Zhigang Luo <zhigang.luo@amd.com>
>>> ---
>>> drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 5 +----
>>> 1 file changed, 1 insertion(+), 4 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
>>> b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
>>> index ceb3968d8326..1c2d9fde9021 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
>>> @@ -1292,10 +1292,7 @@ static int gmc_v9_0_late_init(void *handle)
>>> static void gmc_v9_0_vram_gtt_location(struct amdgpu_device *adev,
>>>                                       struct amdgpu_gmc *mc)
>>> {
>>> -    u64 base = 0;
>>> -
>>> -    if (!amdgpu_sriov_vf(adev))
>>> -            base = adev->mmhub.funcs->get_fb_location(adev);
>>> +    u64 base = adev->mmhub.funcs->get_fb_location(adev);
>>>
>>>       /* add the xgmi offset of the physical node */
>>>       base += adev->gmc.xgmi.physical_node_id * adev-
>>>> gmc.xgmi.node_segment_size;
>>> --
>>> 2.17.1
>>>
>>> _______________________________________________
>>> amd-gfx mailing list
>>> amd-gfx@lists.freedesktop.org
>>> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flis
>>> ts.fre
>>> edesktop.org%2Fmailman%2Flistinfo%2Famd-
>>> gfx&amp;data=04%7C01%7CEmily.Deng%40amd.com%7Cd41e78b1a3af4f08ff
>>> d108d926a1a2d8%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C63
>>> 7583297946242271%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAi
>>> LCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=Nsz
>>> ZyRZHCxj%2FIJ1hYoSrkv3LpTmF9FbchpNMtQ2GE5M%3D&amp;reserved=0
>>> _______________________________________________
>>> amd-gfx mailing list
>>> amd-gfx@lists.freedesktop.org
>>> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flis
>>> ts.fre
>>> edesktop.org%2Fmailman%2Flistinfo%2Famd-
>>> gfx&amp;data=04%7C01%7CEmily.Deng%40amd.com%7Cd41e78b1a3af4f08ff
>>> d108d926a1a2d8%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C63
>>> 7583297946242271%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAi
>>> LCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=Nsz
>>> ZyRZHCxj%2FIJ1hYoSrkv3LpTmF9FbchpNMtQ2GE5M%3D&amp;reserved=0
>> _______________________________________________
>> amd-gfx mailing list
>> amd-gfx@lists.freedesktop.org
>> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flist
>> s.freedesktop.org%2Fmailman%2Flistinfo%2Famd-gfx&amp;data=04%7C01%7CZh
>> igang.Luo%40amd.com%7C9b87dfa195ed4e84a8c808d92749e416%7C3dd8961fe4884
>> e608e11a82d994e183d%7C0%7C0%7C637584020581460118%7CUnknown%7CTWFpbGZsb
>> 3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%
>> 7C1000&amp;sdata=3S6ZEnCCMHHlfc%2B6xmLDz7Bgn91Is7EIpMS7WRxq0Jo%3D&amp;
>> reserved=0

_______________________________________________
amd-gfx mailing list
amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx

  reply	other threads:[~2021-06-04 13:46 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-03 14:13 [PATCH 1/5] drm/amdgpu: remove sriov vf checking from getting fb location Zhigang Luo
2021-06-03 14:13 ` [PATCH 2/5] drm/amdgpu: remove sriov vf gfxhub fb location programming Zhigang Luo
2021-06-03 15:10   ` Liu, Shaoyun
2021-06-03 15:22     ` Luo, Zhigang
2021-06-03 14:13 ` [PATCH 3/5] drm/amdgpu: remove sriov vf mmhub system aperture and " Zhigang Luo
2021-06-03 15:11   ` Liu, Shaoyun
2021-06-03 14:13 ` [PATCH 4/5] drm/amdgpu: add psp microcode init for arcturus and aldebaran sriov vf Zhigang Luo
2021-06-03 15:12   ` Liu, Shaoyun
2021-06-03 15:31     ` Luo, Zhigang
2021-06-07 13:51       ` Zhang, Hawking
2021-06-07 13:59         ` Luo, Zhigang
2021-06-03 14:13 ` [PATCH 5/5] drm/amdgpu: allocate psp fw private buffer from VRAM for " Zhigang Luo
2021-06-03 15:14   ` Liu, Shaoyun
2021-06-03 15:47     ` Luo, Zhigang
2021-06-03 16:43       ` Liu, Shaoyun
2021-06-03 15:09 ` [PATCH 1/5] drm/amdgpu: remove sriov vf checking from getting fb location Liu, Shaoyun
2021-06-04  1:13   ` Deng, Emily
2021-06-04 11:14     ` Christian König
2021-06-04 13:23       ` Luo, Zhigang
2021-06-04 13:46         ` Christian König [this message]
2021-06-04 14:06           ` Luo, Zhigang

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