linux-kernel - Re: [PATCH v2 2/2] drm/amdgpu: add vm fault information to devcoredump

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Message-ID: <ab7c8dde-c914-4e07-a95a-126976917416@amd.com>
Date: Fri, 8 Mar 2024 10:09:34 +0100
From: Christian König <christian.koenig@....com>
To: Sunil Khatri <sunil.khatri@....com>,
 Alex Deucher <alexander.deucher@....com>,
 Shashank Sharma <shashank.sharma@....com>
Cc: amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org, Mukul Joshi <mukul.joshi@....com>,
 Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@....com>
Subject: Re: [PATCH v2 2/2] drm/amdgpu: add vm fault information to
 devcoredump

Am 07.03.24 um 21:50 schrieb Sunil Khatri:
> Add page fault information to the devcoredump.
>
> Output of devcoredump:
> **** AMDGPU Device Coredump ****
> version: 1
> kernel: 6.7.0-amd-staging-drm-next
> module: amdgpu
> time: 29.725011811
> process_name: soft_recovery_p PID: 1720
>
> Ring timed out details
> IP Type: 0 Ring Name: gfx_0.0.0
>
> [gfxhub] Page fault observed
> Faulty page starting at address: 0x0000000000000000
> Protection fault status register: 0x301031
>
> VRAM is lost due to GPU reset!
>
> Signed-off-by: Sunil Khatri <sunil.khatri@....com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c | 14 +++++++++++++-
>   1 file changed, 13 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
> index 147100c27c2d..8794a3c21176 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
> @@ -203,8 +203,20 @@ amdgpu_devcoredump_read(char *buffer, loff_t offset, size_t count,
>   			   coredump->ring->name);
>   	}
>   
> +	if (coredump->adev) {
> +		struct amdgpu_vm_fault_info *fault_info =
> +			&coredump->adev->vm_manager.fault_info;
> +
> +		drm_printf(&p, "\n[%s] Page fault observed\n",
> +			   fault_info->vmhub ? "mmhub" : "gfxhub");
> +		drm_printf(&p, "Faulty page starting at address: 0x%016llx\n",
> +			   fault_info->addr);
> +		drm_printf(&p, "Protection fault status register: 0x%x\n",
> +			   fault_info->status);
> +	}
> +
>   	if (coredump->reset_vram_lost)
> -		drm_printf(&p, "VRAM is lost due to GPU reset!\n");
> +		drm_printf(&p, "\nVRAM is lost due to GPU reset!\n");

Why this additional new line?

Apart from that looks really good to me.

Regards,
Christian.

>   	if (coredump->adev->reset_info.num_regs) {
>   		drm_printf(&p, "AMDGPU register dumps:\nOffset:     Value:\n");
>