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firmware: arm_sdei: Add driver for Software Delegated Exceptions

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The Software Delegated Exception Interface (SDEI) is an ARM standard
for registering callbacks from the platform firmware into the OS.
This is typically used to implement firmware notifications (such as
firmware-first RAS) or promote an IRQ that has been promoted to a
firmware-assisted NMI.

Add the code for detecting the SDEI version and the framework for
registering and unregistering events. Subsequent patches will add the
arch-specific backend code and the necessary power management hooks.

Only shared events are supported, power management, private events and
discovery for ACPI systems will be added by later patches.

Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
James Morse
2018-01-08 15:38:09 +00:00
committed by Catalin Marinas
parent 86f04f6400
commit ad6eb31ef9
7 changed files with 797 additions and 0 deletions
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8
drivers/firmware/Kconfig
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@@ -48,6 +48,14 @@ config ARM_SCPI_POWER_DOMAIN
This enables support for the SCPI power domains which can be
enabled or disabled via the SCP firmware
config ARM_SDE_INTERFACE
bool "ARM Software Delegated Exception Interface (SDEI)"
depends on ARM64
help
The Software Delegated Exception Interface (SDEI) is an ARM
standard for registering callbacks from the platform firmware
into the OS. This is typically used to implement RAS notifications.
config EDD
tristate "BIOS Enhanced Disk Drive calls determine boot disk"
depends on X86