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From: Qunqin Zhao <zhaoqunqin@loongson.cn>
To: Borislav Petkov <bp@alien8.de>
Cc: Qunqin Zhao <zhaoqunqin@163.com>,
	tony.luck@intel.com, linux-edac@vger.kernel.org,
	chenhuacai@kernel.org, linux-kernel@vger.kernel.org,
	Wang Jinwei <wangjinwei@loongson.cn>,
	Yulong Wang <wangyulong@loongson.cn>,
	Dongyan Qian <qiandongyan@loongson.cn>,
	Chao Li <lichao@loongson.cn>,
	Huacai Chen <chenhuacai@loongson.cn>
Subject: Re: [PATCH v6 2/4] EDAC/loongson: Encode node and MC info into mc_idx
Date: Tue, 10 Nov 2026 16:23:29 +0800	[thread overview]
Message-ID: <61dc34e7-e872-42cb-a0b1-be100a78053a@loongson.cn> (raw)
In-Reply-To: <20261110080338.GJavLP2h448voZSQRE@fat_crate.local>


在 2026/11/10 16:03, Borislav Petkov 写道:
> On Tue, Nov 10, 2026 at 03:47:20PM +0800, Qunqin Zhao wrote:
>> "all your nodes belong to memory controller 0"
>> I don't quite follow this sentence. There are four memory controllers on LS3C6000/S.
>>
>> On firmware without mc-idx there can still be more than one  memory controller
> So edac_device_alloc_index() is used to give out indices for other EDAC
> devices with edac_device_alloc_ctl_info() but I guess you could use that in
> your driver until you don't need to add other devices besides MCs and then
> it'll become a mess...
>
> Lemme ask the simplest question first: is there any case where ACPI won't

mc-idx is not guaranteed. There is firmware that does not provide the property.


Qunqin,

Thanks.

> provide that _DSD property or you're in control of the firmware - not like on
> x86 - and this case we're trying to fix is never going to happen anyway...?
>
> Thx.
>


  reply	other threads:[~2026-11-10  8:26 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-11-05  2:55 [PATCH v6 0/4] EDAC/loongson: Improvements for Loongson EDAC driver Qunqin Zhao
2026-11-05  2:55 ` [PATCH v6 1/4] EDAC/loongson: Rename driver-local symbols Qunqin Zhao
2026-11-05  7:10   ` Huacai Chen
2026-11-05  2:55 ` [PATCH v6 2/4] EDAC/loongson: Encode node and MC info into mc_idx Qunqin Zhao
2026-11-10  6:41   ` Borislav Petkov
2026-11-10  7:47     ` Qunqin Zhao
2026-11-10  8:03       ` Borislav Petkov
2026-11-10  8:23         ` Qunqin Zhao [this message]
2026-11-10 18:31           ` Borislav Petkov
2026-11-11  6:37             ` Qunqin Zhao
2026-11-11  8:08               ` Borislav Petkov
2026-11-11  8:33                 ` Qunqin Zhao
2026-11-05  2:55 ` [PATCH v6 3/4] EDAC/loongson: Get DIMM size from ACPI _DSM method Qunqin Zhao
2026-11-05  2:55 ` [PATCH v6 4/4] EDAC/loongson: Add CS4-7 timeout filter for cross-node access Qunqin Zhao

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