linux-kernel - Re: [PATCH 1/5] x86/mce/inject: Check if a bank is unpopulated before error simulation

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Date:   Tue, 28 Sep 2021 00:05:22 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Smita Koralahalli Channabasappa <skoralah@....com>
Cc:     Smita Koralahalli <Smita.KoralahalliChannabasappa@....com>,
        x86@...nel.org, linux-edac@...r.kernel.org,
        linux-kernel@...r.kernel.org, Tony Luck <tony.luck@...el.com>,
        "H . Peter Anvin" <hpa@...or.com>, yazen.ghannam@....com
Subject: Re: [PATCH 1/5] x86/mce/inject: Check if a bank is unpopulated
 before error simulation

On Mon, Sep 27, 2021 at 04:56:17PM -0500, Smita Koralahalli Channabasappa wrote:
> Yes, this makes sense to me now. But you meant to say inj_ipid_set()
> instead of inj_bank_set()..?

Yeah, I had it correct before:

"This whole thing belongs into inj_ipid_set() where you should verify... "

> 
> Something like this:
> 
> -MCE_INJECT_SET(ipid)
> 
> +static int inj_ipid_set(void *data, u64 val)
> +{
> +	struct mce *m = (struct mce*)data;
> 
> +	if cpu_feature_enabled(X86_FEATURE_SMCA)) {
> 
> +		rdmsrl_on_cpu(..
> 		..
> 		..
> +	m->ipid = val;
> +	..
> +}

Yes, and return proper error codes.

Thx.

-- 
Regards/Gruss,
    Boris.

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