linux-kernel - Re: [PATCH] EDAC/mce_amd: Do not load edac_mce

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Message-ID: <ce67dec8-f5c6-a91e-e0e7-4c819df87677@amd.com>
Date:   Fri, 23 Jul 2021 13:18:29 -0500
From:   Kim Phillips <kim.phillips@....com>
To:     Smita Koralahalli <Smita.KoralahalliChannabasappa@....com>,
        x86@...nel.org, linux-edac@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Robert Richter <rric@...nel.org>, Tony Luck <tony.luck@...el.com>,
        James Morse <james.morse@....com>, yazen.ghannam@....com
Subject: Re: [PATCH] EDAC/mce_amd: Do not load edac_mce_amd module on guests

On 6/28/21 12:27 PM, Smita Koralahalli wrote:
> Hypervisors may not expose SMCA feature to the guest.
> 
> Check for X86_FEATURE_HYPERVISOR on entry in mce_amd_init() and return
> -ENODEV if set.
> 
> Suggested-by: Borislav Petkov <bp@...e.de>
> Signed-off-by: Smita Koralahalli <Smita.KoralahalliChannabasappa@....com>
> ---

This gets rid of the "Huh? What family is it: 0x19?!" messages in my 
F19h hosted guest:


Tested-by: Kim Phillips <kim.phillips@....com>


Thanks,

Kim