diff options
| author | Dave Young <dyoung@redhat.com> | 2013-12-20 10:02:18 (GMT) |
|---|---|---|
| committer | Matt Fleming <matt.fleming@intel.com> | 2013-12-21 15:29:36 (GMT) |
| commit | 926172d46038d7610b6b8d84e40db727cefb482d (patch) | |
| tree | 8963aaa9fccd0a4ee0d59717b4de8e8cdfebbe62 /drivers/firmware/efi/Kconfig | |
| parent | a0998eb15afeffbf52a2c2829318f67df9ac57b8 (diff) | |
| download | linux-926172d46038d7610b6b8d84e40db727cefb482d.tar.xz | |
efi: Export EFI runtime memory mapping to sysfs
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 directory /sys/firmware/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
Signed-off-by: Dave Young <dyoung@redhat.com>
Tested-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Diffstat (limited to 'drivers/firmware/efi/Kconfig')
| -rw-r--r-- | drivers/firmware/efi/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/firmware/efi/Kconfig b/drivers/firmware/efi/Kconfig index 3150aa4..730f5f2 100644 --- a/drivers/firmware/efi/Kconfig +++ b/drivers/firmware/efi/Kconfig @@ -39,4 +39,15 @@ config EFI_VARS_PSTORE_DEFAULT_DISABLE config UEFI_CPER def_bool n +config EFI_RUNTIME_MAP + bool "Export efi runtime maps to sysfs" + depends on X86 && EFI && KEXEC + default y + help + Export efi runtime memory maps to /sys/firmware/efi/runtime-map. + That memory map is used for example by kexec to set up efi virtual + mapping the 2nd kernel, but can also be used for debugging purposes. + + See also Documentation/ABI/testing/sysfs-firmware-efi-runtime-map. + endmenu |