linux-kernel - RE: [RFC PATCH 3/5] x86/mce: Introduce a function pointer mce_handle

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Date:   Wed, 6 Apr 2022 22:38:30 +0000
From:   "Luck, Tony" <tony.luck@...el.com>
To:     Smita Koralahalli <Smita.KoralahalliChannabasappa@....com>,
        "Borislav Petkov" <bp@...en8.de>
CC:     "hpa@...or.com" <hpa@...or.com>,
        Yazen Ghannam <yazen.ghannam@....com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>
Subject: RE: [RFC PATCH 3/5] x86/mce: Introduce a function pointer
 mce_handle_storm

> Introduce a function pointer "mce_handle_storm". This function pointer
> does the vendor specific storm handling. In Intel it points to a routine
> to set different thresholds in IA32_MCi_CTL2.

Boris did some cleanups in machine check code to get rid of places
where function pointers were used. E.g.

cc466666ab09 x86/mce: Get rid of the ->quirk_no_way_out() indirect call
8121b8f947be x86/mce: Get rid of msr_ops
cbe1de162d82 x86/mce: Get rid of machine_check_vector
631adc7b0bba x86/mce: Get rid of the mce_severity function pointer

Was that to help with the "noinstr" cleanup?  I'm not sure if that
would apply here (in which case mce_handle_storm would be
a regular function with a switch on "vendor".)

-Tony