linux-kernel - Re: [PATCH 1/1] efi/efi_test: read RuntimeServicesSupported

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Date:   Tue, 29 Dec 2020 14:01:40 +0100
From:   Ard Biesheuvel <ardb@...nel.org>
To:     Heinrich Schuchardt <xypron.glpk@....de>
Cc:     Ivan Hu <ivan.hu@...onical.com>,
        linux-efi <linux-efi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Colin King <colin.king@...onical.com>,
        fwts-devel@...ts.ubuntu.com
Subject: Re: [PATCH 1/1] efi/efi_test: read RuntimeServicesSupported

On Sat, 26 Dec 2020 at 11:16, Heinrich Schuchardt <xypron.glpk@....de> wrote:
>
> On 11/27/20 8:20 PM, Heinrich Schuchardt wrote:
> > Since the UEFI 2.8A specification the UEFI enabled firmware provides a
> > configuration table EFI_RT_PROPERTIES_TABLE which indicates which runtime
> > services are enabled. The EFI stub reads this table and saves the value of
> > the field RuntimeServicesSupported internally.
> >
> > The Firmware Test Suite requires the value to determine if UEFI runtime
> > services are correctly implemented.
> >
> > With this patch an IOCTL call is provided to read the value of the field
> > RuntimeServicesSupported, e.g.
> >
> >      #define EFI_RUNTIME_GET_SUPPORTED_MASK \
> >              _IOR('p', 0x0C, unsigned int)
> >      unsigned int mask;
> >      fd = open("/dev/efi_test", O_RDWR);
> >      ret = ioctl(fd, EFI_RUNTIME_GET_SUPPORTED_MASK, &mask);
> >
> > Signed-off-by: Heinrich Schuchardt <xypron.glpk@....de>
>
> Hello Ard,
>
> the patch has now been admitted to Linus' branch.
>
> Could we, please, have this patch applied to the 5.10 long term release,
> too.
>

If you think this patch needs to go to -stable, please send an email
to stable@...r.kernel.org containing the commit title and SHA1, and a
short motivation why this patch needs to be backported.

If the stable maintainers are willing to take it, I won't object to it.

Thanks,
Ard.