[PATCH 00/18] efi: clean up contents of struct efi

From: Ard Biesheuvel
Date: Sun Feb 16 2020 - 13:24:05 EST

The generic r/w singleton object 'struct efi efi' is currently being used
as a dumping ground for memory addresses of firmware tables that only have
significance for a single architecture, or only at boot time [whereas
struct efi is an object with indefinite lifetime, and which is exported
to modules]

Since we're expecting a new arrival that does affect all architectures,
which will need to be added to struct efi as well, let's do a cleanup
pass, and move out all the per-arch pieces and other stuff that does not
need to live in a global r/w struct.

As a side effect, I ran into some other things that can be refactored
so that more code is shared between architectures, or made x86 specific
if it is something that should maybe not have existed in the first place,
and x86 is the only architecture where we cannot remove it for compatibility

Finally, we get rid of the struct efi::systab member, which we only need
at runtime to get at the 'runtime' pointer, so let's store that instead.
This allows us to drop some ugly handling of the remapped systab address,
which we cannot discover as easily as the remapped 'runtime' pointer.

Cc: nivedita@xxxxxxxxxxxx
Cc: x86@xxxxxxxxxx

Ard Biesheuvel (18):
efi: drop handling of 'boot_info' configuration table
efi/ia64: move HCDP and MPS table handling into IA64 arch code
efi: move UGA and PROP table handling to x86 code
efi: make rng_seed table handling local to efi.c
efi: move mem_attr_table out of struct efi
efi: make memreserve table handling local to efi.c
efi: merge EFI system table revision and vendor checks
efi/ia64: use existing helpers to locate ESI table
efi/ia64: use local variable for EFI system table address
efi/ia64: switch to efi_config_parse_tables()
efi: make efi_config_init() x86 only
efi: clean up config_parse_tables()
efi/x86: remove runtime table address from kexec EFI setup data
efi/x86: make fw_vendor, config_table and runtime sysfs nodes x86
efi/x86: merge assignments of efi.runtime_version
efi: add 'runtime' pointer to struct efi
efi/arm: drop unnecessary references to efi.systab
efi/x86: drop 'systab' member from struct efi

arch/ia64/kernel/efi.c | 55 ++--
arch/ia64/kernel/esi.c | 21 +-
arch/x86/include/asm/efi.h | 6 +-
arch/x86/kernel/asm-offsets_32.c | 5 +
arch/x86/kernel/kexec-bzimage64.c | 5 +-
arch/x86/platform/efi/efi.c | 262 ++++++++++----------
arch/x86/platform/efi/efi_32.c | 13 +-
arch/x86/platform/efi/efi_64.c | 14 +-
arch/x86/platform/efi/efi_stub_32.S | 21 +-
arch/x86/platform/efi/quirks.c | 2 +-
drivers/firmware/efi/arm-init.c | 68 ++---
drivers/firmware/efi/arm-runtime.c | 18 --
drivers/firmware/efi/efi.c | 237 ++++++++----------
drivers/firmware/efi/memattr.c | 13 +-
drivers/firmware/efi/runtime-wrappers.c | 4 +-
drivers/firmware/pcdp.c | 8 +-
include/linux/efi.h | 76 +++---
17 files changed, 379 insertions(+), 449 deletions(-)