linux-kernel - Re: [PATCH v1 0/2] firmware: dmi_scan: Make it work in kexec'ed kernel

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Message-ID: <YMeRiDMet2JyOV4P@smile.fi.intel.com>
Date:   Mon, 14 Jun 2021 20:27:36 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Dave Young <dyoung@...hat.com>
Cc:     Jean Delvare <jdelvare@...e.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Javier Tiá <javier.tia@...il.com>,
        kexec@...ts.infradead.org, Eric Biederman <ebiederm@...ssion.com>,
        linux-efi <linux-efi@...r.kernel.org>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        Ard Biesheuvel <ardb@...nel.org>
Subject: Re: [PATCH v1 0/2] firmware: dmi_scan: Make it work in kexec'ed
 kernel

On Mon, Jun 14, 2021 at 08:07:33PM +0300, Andy Shevchenko wrote:
> On Mon, Jun 14, 2021 at 06:38:30PM +0300, Andy Shevchenko wrote:
> > On Sat, Jun 12, 2021 at 12:40:57PM +0800, Dave Young wrote:
> > > > Probably it is doable to have kexec on 32bit efi working
> > > > without runtime service support, that means no need the trick of fixed
> > > > mapping.
> > > > 
> > > > If I can restore my vm to boot 32bit efi on this weekend then I may provide some draft
> > > > patches for test.
> > > 
> > > Unfortunately I failed to setup a 32bit efi guest,  here are some
> > > untested draft patches, please have a try.
> > 
> > Thanks for the patches.
> > 
> > As previously, I have reverted my hacks and applied your patches (also I
> > dropped patches from previous mail against kernel and kexec-tools) for both
> > kernel and user space on first and second environments.
> > 
> > It does NOT solve the issue.
> > 
> > If there is no idea pops up soon, I'm going to resend my series that
> > workarounds the issue.
> 
> Hold on, I may have made a mistake during testing. Let me retest this.

Double checked, confirmed that it's NOT working.

-- 
With Best Regards,
Andy Shevchenko