From: Matthew Garrett <mjg59@google.com>
To: Andy Lutomirski <luto@amacapital.net>
Cc: linux-efi <linux-efi@vger.kernel.org>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
X86 ML <x86@kernel.org>, linux-pci <linux-pci@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] [EFI,PCI] Allow disabling PCI busmastering on bridges during boot
Date: Tue, 3 Dec 2019 11:41:32 -0800 [thread overview]
Message-ID: <CACdnJuv50s61WPMpHtrF6_=q3sCXD_Tm=30mtLnR_apjV=gjQg@mail.gmail.com> (raw)
In-Reply-To: <CALCETrWUYapn=vTbKnKFVQ3Y4vG0qHwux0ym_To2NWKPew+vrw@mail.gmail.com>
On Tue, Dec 3, 2019 at 7:30 AM Andy Lutomirski <luto@amacapital.net> wrote:
> Would a similar patch apply to non-EFI boot? That is, in a BIOS boot,
> is busmastering on when the kernel is loaded?
It's only relevant where firmware configures the IOMMU but then
removes that configuration before handing control to the OS. I'm not
aware of that happening anywhere other than EFI.
next prev parent reply other threads:[~2019-12-03 19:41 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-03 0:40 [PATCH] [EFI,PCI] Allow disabling PCI busmastering on bridges during boot Matthew Garrett
2019-12-03 0:42 ` Matthew Garrett
2019-12-03 11:54 ` Ard Biesheuvel
2019-12-03 13:38 ` Laszlo Ersek
2019-12-03 19:36 ` Matthew Garrett
2019-12-03 19:40 ` Matthew Garrett
2019-12-04 7:11 ` Laszlo Ersek
2019-12-04 19:29 ` Matthew Garrett
2019-12-03 15:30 ` Andy Lutomirski
2019-12-03 16:33 ` Ard Biesheuvel
2019-12-03 19:41 ` Matthew Garrett [this message]
2019-12-04 19:50 ` Andy Lutomirski
2019-12-04 19:56 ` Matthew Garrett
2019-12-12 15:46 ` Ard Biesheuvel
2019-12-13 21:24 ` Matthew Garrett
2019-12-03 18:23 ` kbuild test robot
2019-12-05 13:04 ` kbuild test robot
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