linux-kernel - Re: [RFC/RFT PATCH 0/6] Switch GHES ioremap_page

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Message-ID: <20171101153043.xgzepqbxsblmppp5@pd.tnic>
Date:   Wed, 1 Nov 2017 16:30:43 +0100
From:   Borislav Petkov <bp@...e.de>
To:     James Morse <james.morse@....com>
Cc:     linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, x86@...nel.org,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>, Tony Luck <tony.luck@...el.com>,
        Tyler Baicar <tbaicar@...eaurora.org>,
        Dongjiu Geng <gengdongjiu@...wei.com>,
        Xie XiuQi <xiexiuqi@...wei.com>, torvalds@...ux-foundation.org,
        Huang Ying <ying.huang@...el.com>,
        Toshi Kani <toshi.kani@....com>
Subject: Re: [RFC/RFT PATCH 0/6] Switch GHES ioremap_page_range() to use
 fixmap

On Wed, Nov 01, 2017 at 02:58:33PM +0000, James Morse wrote:
> Does anyone have an x86 machine that does firmware-first using NOTIFY_NMI?

AFAIK, the only one who has access to a reportedly somewhat working GHES
implementation is Toshi. CCed.

> ('ls /sys/firmware/acpi/tables/', if you have a HEST and EINJ we should be able
> to work something out)

That's not enough. All the EINJ boxes I have would stop accepting EINJ
writes after a couple of injections, i.e., BIOS would get "stuffed". :-)))

Maybe Tony has something better. He's already on CC.

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--