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| author | Matt Fleming <matt@codeblueprint.co.uk> | 2016-04-25 23:06:59 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-04-28 12:34:03 +0300 |
| commit | f0133f3c5b8bb34ec4dec50c27e7a655aeee8935 (patch) | |
| tree | 77cc29480d4aac1168560722f4bcb3c2b7658667 /drivers/firmware/efi/Makefile | |
| parent | 806b0351c9ff9890c1ef0ba2c46237baef49ac79 (diff) | |
| download | linux-f0133f3c5b8bb34ec4dec50c27e7a655aeee8935.tar.xz | |
efi: Add 'capsule' update support
The EFI capsule mechanism allows data blobs to be passed to the EFI
firmware. A common use case is performing firmware updates. This patch
just introduces the main infrastructure for interacting with the
firmware, and a driver that allows users to upload capsules will come
in a later patch.
Once a capsule has been passed to the firmware, the next reboot must
be performed using the ResetSystem() EFI runtime service, which may
involve overriding the reboot type specified by reboot=. This ensures
the reset value returned by QueryCapsuleCapabilities() is used to
reset the system, which is required for the capsule to be processed.
efi_capsule_pending() is provided for this purpose.
At the moment we only allow a single capsule blob to be sent to the
firmware despite the fact that UpdateCapsule() takes a 'CapsuleCount'
parameter. This simplifies the API and shouldn't result in any
downside since it is still possible to send multiple capsules by
repeatedly calling UpdateCapsule().
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Bryan O'Donoghue <pure.logic@nexus-software.ie>
Cc: Kweh Hock Leong <hock.leong.kweh@intel.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Peter Jones <pjones@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: joeyli <jlee@suse.com>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/1461614832-17633-28-git-send-email-matt@codeblueprint.co.uk
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/firmware/efi/Makefile')
| -rw-r--r-- | drivers/firmware/efi/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile index b0808080e744..fb8ad5db6547 100644 --- a/drivers/firmware/efi/Makefile +++ b/drivers/firmware/efi/Makefile @@ -10,6 +10,7 @@ KASAN_SANITIZE_runtime-wrappers.o := n obj-$(CONFIG_EFI) += efi.o vars.o reboot.o memattr.o +obj-$(CONFIG_EFI) += capsule.o obj-$(CONFIG_EFI_VARS) += efivars.o obj-$(CONFIG_EFI_ESRT) += esrt.o obj-$(CONFIG_EFI_VARS_PSTORE) += efi-pstore.o |