This series adds support for keeping the EFI memory map around at runtime for x86 (ARM and arm64 already have this support). Additionally, drivers can now reserve EFI boot services regions such that they are not released back to the kernel during efi_free_boot_services(). With these two features it becomes possible to pass things like the EFI System Resource Table data structures across kexec reboot. This series also includes a whole bunch of refactoring and cleanups to move code out of arch or driver-specific files into generic places. I've given these patches some light testing, but it would be good if others could provide more given that this series touches so many different code paths. ARM/arm64 folks, you're going to want to pay particular attention to PATCH 3 where I drop the read-only mapping of the EFI memory map since it causes problems for x86. I am aware that we leak memory maps when new ones get installed, e.g. during __efi_enter_virtual_mode(), but that's an existing bug that requires everyone to allocate memory maps the same way before it can be fixed. arch/x86/include/asm/efi.h | 1 - arch/x86/kernel/setup.c | 13 +- arch/x86/platform/efi/efi-bgrt.c | 13 +- arch/x86/platform/efi/efi.c | 198 ++++++++++++------------- arch/x86/platform/efi/efi_64.c | 20 --- arch/x86/platform/efi/quirks.c | 123 ++++++++++++++-- drivers/firmware/efi/Makefile | 2 +- drivers/firmware/efi/arm-init.c | 17 +-- drivers/firmware/efi/arm-runtime.c | 4 +- drivers/firmware/efi/efi.c | 64 ++++---- drivers/firmware/efi/esrt.c | 20 +-- drivers/firmware/efi/fake_mem.c | 125 ++-------------- drivers/firmware/efi/memmap.c | 292 +++++++++++++++++++++++++++++++++++++ drivers/firmware/efi/runtime-map.c | 35 ++--- include/linux/efi.h | 34 ++++- 15 files changed, 605 insertions(+), 356 deletions(-) create mode 100644 drivers/firmware/efi/memmap.c -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
