From: Ard Biesheuvel <ardb@kernel.org>
To: linux-efi@vger.kernel.org
Cc: linux+pull@armlinux.org.uk, linux-arm-kernel@lists.infradead.org
Subject: [GIT PULL] ARM: simplify handover from UEFI to decompressor
Date: Sun, 17 May 2020 14:09:59 +0200 [thread overview]
Message-ID: <20200517120959.7191-1-ardb@kernel.org> (raw)
The following changes since commit 91e4f3d37e1a932396801fc2831286353821ff23:
ARM: 8972/1: boot: Obtain start of physical memory from DTB (2020-04-29 13:30:29 +0100)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git tags/pr-efi-arm-no-relocate
for you to fetch changes up to ea98a6da3baf477541f8cbb036d1827e6b84ac91:
ARM: decompressor: run decompressor in place if loaded via UEFI (2020-05-06 09:58:24 +0200)
----------------------------------------------------------------
Simply EFI handover to decompressor
The EFI stub in the ARM kernel runs in the context of the firmware, which
means it usually runs with the caches and MMU on. Currently, we relocate
the zImage so it appears in the first 128 MiB, disable the MMU and caches
and invoke the decompressor via its ordinary entry point. However, since we
can pass the base of DRAM directly, there is no need to relocate the zImage,
which also means there is no need to disable and re-enable the caches and
create new page tables etc.
----------------------------------------------------------------
Ard Biesheuvel (5):
ARM: decompressor: move headroom variable out of LC0
ARM: decompressor: split off _edata and stack base into separate object
ARM: decompressor: defer loading of the contents of the LC0 structure
ARM: decompressor: move GOT into .data for EFI enabled builds
ARM: decompressor: run decompressor in place if loaded via UEFI
arch/arm/boot/compressed/head.S | 91 +++++++++++++------------------
arch/arm/boot/compressed/vmlinux.lds.S | 5 ++
drivers/firmware/efi/libstub/arm32-stub.c | 45 ++-------------
3 files changed, 48 insertions(+), 93 deletions(-)
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
reply other threads:[~2020-05-17 12:10 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=20200517120959.7191-1-ardb@kernel.org \
--to=ardb@kernel.org \
--cc=linux+pull@armlinux.org.uk \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-efi@vger.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).