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authorKweh, Hock Leong <hock.leong.kweh@intel.com>2016-04-25 22:07:01 +0200
committerIngo Molnar <mingo@kernel.org>2016-04-28 11:34:05 +0200
commit65117f1aa1b2d145fd5ca376bde642794d0aae1b (patch)
tree05f8f72fd15dd3c98060ceda1cfb2be5f91c60b0 /drivers/firmware/efi/Kconfig
parentx86/efi: Force EFI reboot to process pending capsules (diff)
downloadlinux-65117f1aa1b2d145fd5ca376bde642794d0aae1b.tar.xz
linux-65117f1aa1b2d145fd5ca376bde642794d0aae1b.zip
efi: Add misc char driver interface to update EFI firmware
This patch introduces a kernel module to expose a capsule loader interface (misc char device file note) for users to upload capsule binaries. Example: cat firmware.bin > /dev/efi_capsule_loader Any upload error will be returned while doing "cat" through file operation write() function call. Signed-off-by: Kweh, Hock Leong <hock.leong.kweh@intel.com> [ Update comments and Kconfig text ] Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk> Reviewed-by: Bryan O'Donoghue <pure.logic@nexus-software.ie> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Peter Jones <pjones@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sam Protsenko <semen.protsenko@linaro.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: joeyli <jlee@suse.com> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/1461614832-17633-30-git-send-email-matt@codeblueprint.co.uk Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/firmware/efi/Kconfig')
-rw-r--r--drivers/firmware/efi/Kconfig10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/firmware/efi/Kconfig b/drivers/firmware/efi/Kconfig
index 0b0b635aa101..6394152f648f 100644
--- a/drivers/firmware/efi/Kconfig
+++ b/drivers/firmware/efi/Kconfig
@@ -102,6 +102,16 @@ config EFI_BOOTLOADER_CONTROL
bootloader reads this reboot reason and takes particular
action according to its policy.
+config EFI_CAPSULE_LOADER
+ tristate "EFI capsule loader"
+ depends on EFI
+ help
+ This option exposes a loader interface "/dev/efi_capsule_loader" for
+ users to load EFI capsules. This driver requires working runtime
+ capsule support in the firmware, which many OEMs do not provide.
+
+ Most users should say N.
+
endmenu
config UEFI_CPER