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

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Message-ID: <CADnq5_OaCRAjCZGOEpd1gTFSUHdNkVbDqDgx_LQKw_JR1Qtv3Q@mail.gmail.com>
Date: Thu, 7 Mar 2024 14:14:12 -0500
From: Alex Deucher <alexdeucher@...il.com>
To: Sunil Khatri <sunil.khatri@....com>
Cc: Alex Deucher <alexander.deucher@....com>, 
	Christian König <christian.koenig@....com>, 
	Shashank Sharma <shashank.sharma@....com>, 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 2/2] drm/amdgpu: add vm fault information to devcoredump

On Thu, Mar 7, 2024 at 12:00 PM Sunil Khatri <sunil.khatri@....com> wrote:
>
> 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

Do you want a : before the address for consistency?

> Protection fault status register:0x301031

How about a space after the : for consistency?

For parsability, it may make more sense to just have a list of key value pairs:
[GPU page fault]
hub:
addr:
status:
[Ring timeout details]
IP:
ring:
name:

etc.

>
> 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..dd39e614d907 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");
>         if (coredump->adev->reset_info.num_regs) {
>                 drm_printf(&p, "AMDGPU register dumps:\nOffset:     Value:\n");
>
> --
> 2.34.1
>