[PATCH 0/5] memory attribute table support
ard.biesheuvel at linaro.org
Mon Feb 22 06:25:53 PST 2016
This implements ARM/arm64 support for dealing with the UEFI memory attribute
table, which allows the OS to map UEFI Runtime Services regions with stricter
I have tried to implement the early discovery and validation of the table
as generically as possible. I think it should be reusable on x86 as well,
but I haven't tried myself. Note that this also depends on the way we
deal with the reservation of BootServicesData regions goind forward.
Note that for 32-bit ARM, this depends on , which addresses an issue
with memremap() on that architecture
Patches #1 and #2 implement support for the EFI_MEMORY_RO and EFI_MEMORY_XP
attributes, and as it turns out, this code supports both the (obsolete)
PropertiesTable and the new Memory Attributes table, so I moved them to the
beginning of the series.
Patch #3 adds the GUID and type definitions for the memory attributes table.
Patch #4 implements the generic handling of the table.
Patch #5 wires it up for ARM and arm64.
Ard Biesheuvel (5):
ARM: efi: apply strict permissons for UEFI Runtime Services regions
arm64: efi: apply strict permissons for UEFI Runtime Services regions
efi: add support for the EFI_MEMORY_ATTRIBUTES_TABLE config table
efi: implement generic support for the Memory Attributes table
arm*: efi: take the Memory Attributes table into account
arch/arm/include/asm/efi.h | 1 +
arch/arm/kernel/efi.c | 41 ++++++
arch/arm64/include/asm/efi.h | 2 +
arch/arm64/kernel/efi.c | 27 +++-
drivers/firmware/efi/Makefile | 2 +-
drivers/firmware/efi/arm-init.c | 1 +
drivers/firmware/efi/arm-runtime.c | 3 +
drivers/firmware/efi/efi.c | 2 +
drivers/firmware/efi/memattr.c | 137 ++++++++++++++++++++
include/linux/efi.h | 19 +++
10 files changed, 229 insertions(+), 6 deletions(-)
create mode 100644 drivers/firmware/efi/memattr.c
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