From: Ard Biesheuvel <ardb@kernel.org>
To: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: "Jürgen Groß" <jgross@suse.com>,
xen-devel@lists.xenproject.org, linux-fbdev@vger.kernel.org,
dri-devel@lists.freedesktop.org,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
"Peter Jones" <pjones@redhat.com>,
linux-efi <linux-efi@vger.kernel.org>
Subject: Re: [PATCH] efi: avoid error message when booting under Xen
Date: Fri, 10 Jul 2020 16:27:23 +0300 [thread overview]
Message-ID: <CAMj1kXGE52Y6QQhGLU6r_9x6TVftZqfS7zyLCiDusZhV4tbhjg@mail.gmail.com> (raw)
In-Reply-To: <170e01b1-220d-5cb7-03b2-c70ed3ae58e4@samsung.com>
On Fri, 10 Jul 2020 at 13:17, Bartlomiej Zolnierkiewicz
<b.zolnierkie@samsung.com> wrote:
>
>
> [ added EFI Maintainer & ML to Cc: ]
>
> Hi,
>
> On 7/9/20 11:17 AM, Jürgen Groß wrote:
> > On 28.06.20 10:50, Jürgen Groß wrote:
> >> Ping?
> >>
> >> On 10.06.20 16:10, Juergen Gross wrote:
> >>> efifb_probe() will issue an error message in case the kernel is booted
> >>> as Xen dom0 from UEFI as EFI_MEMMAP won't be set in this case. Avoid
> >>> that message by calling efi_mem_desc_lookup() only if EFI_PARAVIRT
> >>> isn't set.
> >>>
Why not test for EFI_MEMMAP instead of EFI_BOOT?
> >>> Fixes: 38ac0287b7f4 ("fbdev/efifb: Honour UEFI memory map attributes when mapping the FB")
> >>> Signed-off-by: Juergen Gross <jgross@suse.com>
> >>> ---
> >>> drivers/video/fbdev/efifb.c | 2 +-
> >>> 1 file changed, 1 insertion(+), 1 deletion(-)
> >>>
> >>> diff --git a/drivers/video/fbdev/efifb.c b/drivers/video/fbdev/efifb.c
> >>> index 65491ae74808..f5eccd1373e9 100644
> >>> --- a/drivers/video/fbdev/efifb.c
> >>> +++ b/drivers/video/fbdev/efifb.c
> >>> @@ -453,7 +453,7 @@ static int efifb_probe(struct platform_device *dev)
> >>> info->apertures->ranges[0].base = efifb_fix.smem_start;
> >>> info->apertures->ranges[0].size = size_remap;
> >>> - if (efi_enabled(EFI_BOOT) &&
> >>> + if (efi_enabled(EFI_BOOT) && !efi_enabled(EFI_PARAVIRT) &&
> >>> !efi_mem_desc_lookup(efifb_fix.smem_start, &md)) {
> >>> if ((efifb_fix.smem_start + efifb_fix.smem_len) >
> >>> (md.phys_addr + (md.num_pages << EFI_PAGE_SHIFT))) {
> >>>
> >>
> >
> > In case I see no reaction from the maintainer for another week I'll take
> > this patch through the Xen tree.
>
> From fbdev POV this change looks fine to me and I'm OK with merging it
> through Xen or EFI tree:
>
> Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
>
> Best regards,
> --
> Bartlomiej Zolnierkiewicz
> Samsung R&D Institute Poland
> Samsung Electronics
next prev parent reply other threads:[~2020-07-10 13:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-10 14:10 [PATCH] efi: avoid error message when booting under Xen Juergen Gross
2020-06-28 8:50 ` Jürgen Groß
2020-07-09 9:17 ` Jürgen Groß
2020-07-10 10:16 ` Bartlomiej Zolnierkiewicz
2020-07-10 13:27 ` Ard Biesheuvel [this message]
2020-07-10 13:38 ` Jürgen Groß
2020-07-10 13:41 ` Ard Biesheuvel
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