On 10/27/13 at 11:47am, Dave Young wrote:
kexec kernel will need exactly same mapping for
efi runtime memory ranges. Thus here export the
runtime ranges mapping to sysfs, kexec-tools
will assemble them and pass to 2nd kernel via
setup_data.
Introducing a new directly /sys/firmware/efi/efi-runtime-map
Just like /sys/firmware/memmap. Containing below attribute
in each file of that directory:
attribute num_pages phys_addr type virt_addr
It will not work for efi 32bit. Only x86_64 currently.
Signed-off-by: Dave Young <dyoung(a)redhat.com>
---
arch/x86/include/asm/efi.h | 3
arch/x86/platform/efi/efi.c | 11 ++
drivers/firmware/efi/Kconfig | 10 +
drivers/firmware/efi/Makefile | 1
drivers/firmware/efi/efi-runtime-map.c | 166 +++++++++++++++++++++++++++++++++
drivers/firmware/efi/efi.c | 3
6 files changed, 193 insertions(+), 1 deletion(-)
Remind myself: add below to Documentaion in next version:
Documentation/ABI/testing/sysfs-efi-runtime-map