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authorMatt Fleming <matt@codeblueprint.co.uk>2016-04-25 23:06:59 +0300
committerIngo Molnar <mingo@kernel.org>2016-04-28 12:34:03 +0300
commitf0133f3c5b8bb34ec4dec50c27e7a655aeee8935 (patch)
tree77cc29480d4aac1168560722f4bcb3c2b7658667 /drivers/firmware/efi/Makefile
parent806b0351c9ff9890c1ef0ba2c46237baef49ac79 (diff)
downloadlinux-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/Makefile1
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