From: Arvind Sankar <nivedita@alum.mit.edu>
To: Ard Biesheuvel <ardb@kernel.org>
Cc: Arvind Sankar <nivedita@alum.mit.edu>,
linux-efi <linux-efi@vger.kernel.org>,
Hans de Goede <hdegoede@redhat.com>,
the arch/x86 maintainers <x86@kernel.org>
Subject: Re: [PATCH v3 0/6] efi/x86: add support for generic EFI mixed mode boot
Date: Sun, 1 Mar 2020 15:00:35 -0500 [thread overview]
Message-ID: <20200301200035.GA2031375@rani.riverdale.lan> (raw)
In-Reply-To: <CAKv+Gu_N3vbea79CAQNZn6DmKBsKOhT9ucQYgBf0_8Pnd+vz2g@mail.gmail.com>
On Sun, Mar 01, 2020 at 08:36:42PM +0100, Ard Biesheuvel wrote:
> On Sun, 1 Mar 2020 at 18:22, Arvind Sankar <nivedita@alum.mit.edu> wrote:
> >
> > On Sun, Mar 01, 2020 at 12:15:10PM -0500, Arvind Sankar wrote:
> > > What I'm doing is creating an x86-64 defconfig based on tip:efi/core,
> > > and then running it via
> > >
> > > $ qemu-system-x86_64 -cpu Haswell -pflash qemu/OVMF_64.fd \
> > ^^^^^^^
> > That OVMF_64.fd is incorrect copy/paste from a different run, the panic
> > case is using OVMF-mixed-mode-compat-section.fd.
> > > -drive file=fat:rw:qemu/boot -nographic -m 3072
>
> Thanks for the patch. Interestingly, I don't even make it to the point
> where it crashes, and I end up in an ASSERT() in the firmware:
>
> ASSERT_EFI_ERROR (Status = Not Found)
> ASSERT /home/ardbie01/build/edk2/MdeModulePkg/Universal/ReportStatusCodeRouter/RuntimeDxe/ReportStatusCodeRouterRuntimeDxe.c(347):
> !EFI_ERROR (Status)
>
> which appears to be a result of the fact that the memory map passed to
> SetVirtualAddressMap() does not cover some function pointer that gets
> converted in that code.
>
> I don't remember - does mixed mode even work in general with 3 GB of memory?
Oh -- is there some option to enable debugging assertions? I did see
that it crashed somewhere inside SetVirtualMap (i.e. we called it and
it never returned).
For some reason, with nokaslr on the command line, I can't get this to
crash. All the addresses seem to be within 4Gb, so it ought to work, no?
next prev parent reply other threads:[~2020-03-01 20:00 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-22 15:55 [PATCH v3 0/6] efi/x86: add support for generic EFI mixed mode boot Ard Biesheuvel
2020-02-22 15:55 ` [PATCH v3 1/6] efi/x86: add headroom to decompressor BSS to account for setup block Ard Biesheuvel
2020-02-22 15:55 ` [PATCH v3 2/6] efi/x86: Drop redundant .bss section Ard Biesheuvel
2020-02-22 15:55 ` [PATCH v3 3/6] efi/libstub/x86: Make loaded_image protocol handling mixed mode safe Ard Biesheuvel
2020-02-22 15:55 ` [PATCH v3 4/6] efi/libstub/x86: Use Exit() boot service to exit the stub on errors Ard Biesheuvel
2020-02-22 15:55 ` [PATCH v3 5/6] efi/x86: Implement mixed mode boot without the handover protocol Ard Biesheuvel
2020-02-22 15:55 ` [PATCH v3 6/6] efi/x86: Add true mixed mode entry point into .compat section Ard Biesheuvel
2020-03-01 17:15 ` [PATCH v3 0/6] efi/x86: add support for generic EFI mixed mode boot Arvind Sankar
2020-03-01 17:22 ` Arvind Sankar
2020-03-01 19:36 ` Ard Biesheuvel
2020-03-01 20:00 ` Arvind Sankar [this message]
2020-03-01 20:02 ` Ard Biesheuvel
2020-03-01 20:20 ` Ard Biesheuvel
2020-03-01 20:41 ` Ard Biesheuvel
2020-03-01 20:54 ` Arvind Sankar
2020-03-01 21:36 ` Ard Biesheuvel
2020-03-01 22:01 ` Arvind Sankar
2020-03-01 22:56 ` Ard Biesheuvel
2020-03-01 23:03 ` Arvind Sankar
2020-03-02 12:14 ` Ard Biesheuvel
2020-03-03 4:19 ` Arvind Sankar
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200301200035.GA2031375@rani.riverdale.lan \
--to=nivedita@alum.mit.edu \
--cc=ardb@kernel.org \
--cc=hdegoede@redhat.com \
--cc=linux-efi@vger.kernel.org \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.