linux-kernel - Re: [PATCH v2] arch/x86: Fix boot_cpu

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Message-ID: <20180801154255.GC13988@nazgul.tnic>
Date:   Wed, 1 Aug 2018 17:43:14 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Prarit Bhargava <prarit@...hat.com>
Cc:     linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org,
        sironi@...zon.de, tony.luck@...el.com
Subject: Re: [PATCH v2] arch/x86: Fix boot_cpu_data.microcode version output

(dropping stable@)

On Tue, Jul 31, 2018 at 07:27:39AM -0400, Prarit Bhargava wrote:
> I tested this on AMD Ryzen & Intel Broadwell system and dumped the
> boot_cpu_data before and after a microcode update.  On the Intel
> system I also did a fatal MCE using mce-inject to confirm the output
> from the mce handling code.

Ok, sending the two patches I've massaged into submission as a reply to
this message - please run them on your boxes. You can also inject MCEs
on the AMD box to verify - simply enable CONFIG_X86_MCE_INJECT, go to
debugfs and do, for example:

cd /sys/kernel/debug/mce-inject/
echo 10 > /sys/devices/system/machinecheck/machinecheck0/check_interval
echo 0x9c7d410092080813 > status; echo 0x000000006d3d483b > addr; echo 2 > cpu; echo 4 > bank; echo hw > flags
echo 0xbc00200000010015 > status; echo 0x00000000942e4d98 > addr; echo 6 > cpu; echo 2 > bank; echo hw > flags
echo 0xfe000010000b0c0f > status; echo 0xe1101add1e550012 > addr; echo 0xcafebeef > misc; echo 2 > cpu; echo hw > flags; echo 4 > bank

Thanks!

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--