linux-kernel - Re: [PATCH v4 4/4] EDAC/amd64: Enumerate memory on Aldebaran GPU nodes

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Date:   Thu, 21 Oct 2021 16:40:51 +0000
From:   Yazen Ghannam <yazen.ghannam@....com>
To:     Naveen Krishna Chatradhi <nchatrad@....com>
Cc:     linux-edac@...r.kernel.org, x86@...nel.org,
        linux-kernel@...r.kernel.org, bp@...en8.de, mingo@...hat.com,
        mchehab@...nel.org, Muralidhara M K <muralimk@....com>
Subject: Re: [PATCH v4 4/4] EDAC/amd64: Enumerate memory on Aldebaran GPU
 nodes

On Fri, Oct 15, 2021 at 12:24:00AM +0530, Naveen Krishna Chatradhi wrote:
...
> @@ -3726,6 +3935,17 @@ static struct amd64_family_type *per_family_init(struct amd64_pvt *pvt)
>  			pvt->ops = &family_types[F17_M70H_CPUS].ops;
>  			fam_type->ctl_name = "F19h_M20h";
>  			break;
> +		} else if (pvt->model >= 0x30 && pvt->model <= 0x3f) {
> +			if (pvt->mc_node_id >= amd_cpu_node_count()) {
> +				fam_type = &family_types[ALDEBARAN_GPUS];

The fam_type needs to become part of amd64_pvt.

Otherwise, what happens here is the module loads on a CPU node and sets a CPU
family type. Then a GPU node is probed and the family type is overwritten
with a GPU family type.

> +				pvt->ops = &family_types[ALDEBARAN_GPUS].ops;
> +				pvt->is_gpu = true;
> +			} else {
> +				fam_type = &family_types[F19_CPUS];
> +				pvt->ops = &family_types[F19_CPUS].ops;
> +				fam_type->ctl_name = "F19h_M30h";
> +			}
> +			break;
>  		}
>  		fam_type	= &family_types[F19_CPUS];
>  		pvt->ops	= &family_types[F19_CPUS].ops;
> @@ -3808,9 +4028,10 @@ static int init_one_instance(struct amd64_pvt *pvt)

Thanks,
Yazen