linux-kernel - Re: [PATCH] drm/amdkfd: enable kfd on RISCV systems

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Message-Id: <202504291317.53TDHHjY085301@mse-db.zte.com.cn>
Date: Tue, 29 Apr 2025 17:29:05 +0800 (CST)
From: <liu.song13@....com.cn>
To: <felix.kuehling@....com>
Cc: <alexander.deucher@....com>, <christian.koenig@....com>,
        <airlied@...il.com>, <simona@...ll.ch>,
        <amd-gfx@...ts.freedesktop.org>, <dri-devel@...ts.freedesktop.org>,
        <linux-kernel@...r.kernel.org>, <liu.xuemei1@....com.cn>,
        <jiang.xuexin@....com.cn>, <xue.zhihong@....com.cn>
Subject: Re: [PATCH] drm/amdkfd: enable kfd on RISCV systems

>> From: Xuemei Liu <liu.xuemei1@....com.cn>
>>
>> KFD has been confirmed that can run on RISCV systems. It's necessary to
>> support CONFIG_HSA_AMD on RISCV.
> 
> Is there a public user mode branch with any changes needed to make ROCm 
> user mode work with RISCV?
> 
> One more question inline.
> 
> 
>> Signed-off-by: Xuemei Liu <liu.xuemei1@....com.cn>
>> ---
>>   drivers/gpu/drm/amd/amdkfd/Kconfig | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdkfd/Kconfig b/drivers/gpu/drm/amd/amdkfd/Kconfig
>> index d3c3d3ab7225..9d4a5f8ef43f 100644
>> --- a/drivers/gpu/drm/amd/amdkfd/Kconfig
>> +++ b/drivers/gpu/drm/amd/amdkfd/Kconfig
>> @@ -5,7 +5,7 @@
>>
>>   config HSA_AMD
>>    bool "HSA kernel driver for AMD GPU devices"
>> - depends on DRM_AMDGPU && (X86_64 || ARM64 || PPC64)
>> + depends on DRM_AMDGPU && (X86_64 || ARM64 || PPC64 || RISCV)
> 
> The KFD memory model only works on 64-bit architectures. Is there a way 
> to express that in the RISCV dependency?
> 
> Regards,
>   Felix

Dear Felix:

  Thanks for your feedback.
  Regarding the issues you've pointed out:
  1. The adaptation work of ROCm user mode work on RISCV was done by my collegue. He replied that he made no changes in ROCm code.
  2. I will send patch-v2 to satisfy KFD only work on 64-bit architectures.

Best regards,
  Xuemei