From: Matt Fleming <matt@console-pimps.org>
To: linux-efi@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, Andi Kleen <ak@linux.intel.com>,
Tony Luck <tony.luck@intel.com>,
Seiji Aguchi <seiji.aguchi@hds.com>,
x86@kernel.org, Matt Fleming <matt.fleming@intel.com>
Subject: [PATCH 0/5] EFI capsule pstore support
Date: Wed, 16 Oct 2013 14:50:55 +0100 [thread overview]
Message-ID: <1381931460-6999-1-git-send-email-matt@console-pimps.org> (raw)
From: Matt Fleming <matt.fleming@intel.com>
The UEFI spec describes a capsule mechanism that allows data blobs to be
handed to the firmware at runtime. If the firmware doesn't recognise the
guid of the capsule and if certain flags are set in the capsule header,
the firmware will preserve the memory region containing the capsule
across a reboot. We can utilise this feature to perform crash dumps and
function tracing to aid in crash analysis.
The capsule buffers containing pstore data can be much larger than is
possible with the EFI variable pstore backend, which makes it
particularly attractive for function tracing. Futhermore, because the
memory regions containing the capsule data are registered with the
firmware prior to the crash (as opposed to efi-pstore.c which invokes
variable services from the crash handler) it's more useful for debugging
hard hangs.
Matt Fleming (5):
pstore/ftrace: Don't increment initial data offset
efi: Introduce a Runtime Services lock
efi: Add common efi_reboot() implementation
efi: Move efi_status_to_err() to efi.h
efi: Capsule update support and pstore backend
arch/ia64/kernel/efi.c | 33 +-
arch/ia64/kernel/process.c | 2 +-
arch/x86/kernel/reboot.c | 21 +-
arch/x86/platform/efi/efi.c | 108 +++++-
drivers/firmware/efi/Kconfig | 19 +
drivers/firmware/efi/Makefile | 3 +-
drivers/firmware/efi/capsule.c | 802 +++++++++++++++++++++++++++++++++++++++++
drivers/firmware/efi/efi.c | 12 +
drivers/firmware/efi/reboot.c | 37 ++
drivers/firmware/efi/vars.c | 52 +--
fs/pstore/inode.c | 1 -
include/linux/efi.h | 54 +++
12 files changed, 1072 insertions(+), 72 deletions(-)
create mode 100644 drivers/firmware/efi/capsule.c
create mode 100644 drivers/firmware/efi/reboot.c
--
1.8.1.4
next reply other threads:[~2013-10-16 13:51 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-16 13:50 Matt Fleming [this message]
2013-10-16 13:50 ` [PATCH 1/5] pstore/ftrace: Don't increment initial data offset Matt Fleming
2013-10-16 13:50 ` [PATCH 2/5] efi: Introduce a Runtime Services lock Matt Fleming
2013-10-16 23:36 ` Seiji Aguchi
2013-10-16 13:50 ` [PATCH 3/5] efi: Add common efi_reboot() implementation Matt Fleming
2013-10-16 13:50 ` [PATCH 4/5] efi: Move efi_status_to_err() to efi.h Matt Fleming
2013-10-16 13:51 ` [PATCH 5/5] efi: Capsule update support and pstore backend Matt Fleming
2013-10-16 14:19 ` Matthew Garrett
2013-10-16 14:52 ` Luck, Tony
2013-10-17 0:06 ` Seiji Aguchi
2013-10-17 23:18 ` Andi Kleen
2013-10-17 12:05 ` Matt Fleming
2013-10-17 11:55 ` Matt Fleming
2013-10-17 23:19 ` Andi Kleen
2013-10-16 20:14 ` Andi Kleen
2013-10-17 12:14 ` Matt Fleming
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