diff options
| author | Dave Young <dyoung@redhat.com> | 2013-12-20 11:02:17 +0100 |
|---|---|---|
| committer | Matt Fleming <matt.fleming@intel.com> | 2013-12-21 16:29:36 +0100 |
| commit | a0998eb15afeffbf52a2c2829318f67df9ac57b8 (patch) | |
| tree | 5f19084e93f018407d8dfc3521d073250719e67f /Documentation | |
| parent | x86/efi: Cleanup efi_enter_virtual_mode() function (diff) | |
| download | linux-a0998eb15afeffbf52a2c2829318f67df9ac57b8.tar.xz linux-a0998eb15afeffbf52a2c2829318f67df9ac57b8.zip | |
efi: Export more EFI table variables to sysfs
Export fw_vendor, runtime and config table physical addresses to
/sys/firmware/efi/{fw_vendor,runtime,config_table} because kexec kernels
need them.
From EFI spec these 3 variables will be updated to virtual address after
entering virtual mode. But kernel startup code will need the physical
address.
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 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-firmware-efi | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-firmware-efi b/Documentation/ABI/testing/sysfs-firmware-efi new file mode 100644 index 000000000000..05874da7ce80 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-firmware-efi @@ -0,0 +1,20 @@ +What: /sys/firmware/efi/fw_vendor +Date: December 2013 +Contact: Dave Young <dyoung@redhat.com> +Description: It shows the physical address of firmware vendor field in the + EFI system table. +Users: Kexec + +What: /sys/firmware/efi/runtime +Date: December 2013 +Contact: Dave Young <dyoung@redhat.com> +Description: It shows the physical address of runtime service table entry in + the EFI system table. +Users: Kexec + +What: /sys/firmware/efi/config_table +Date: December 2013 +Contact: Dave Young <dyoung@redhat.com> +Description: It shows the physical address of config table entry in the EFI + system table. +Users: Kexec |