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| author | Steve McIntyre <steve@einval.com> | 2015-01-09 16:29:53 +0100 |
|---|---|---|
| committer | Matt Fleming <matt.fleming@intel.com> | 2015-01-12 12:51:32 +0100 |
| commit | 2859dff97e54db4795b8b7d9606cb8efcec722ff (patch) | |
| tree | 91836ca6535a94c9fe92972d9c01911f5e0d79ba /drivers/acpi/battery.h | |
| parent | Merge tag 'rneri-efi-next' of https://github.com/ricardon/efi into next (diff) | |
| download | linux-2859dff97e54db4795b8b7d9606cb8efcec722ff.tar.xz linux-2859dff97e54db4795b8b7d9606cb8efcec722ff.zip | |
efi: Expose underlying UEFI firmware platform size to userland
In some cases (e.g. Intel Bay Trail machines), the kernel will happily
run in 64-bit even if the underlying UEFI firmware platform is
32-bit. That's great, but it's difficult for userland utilities like
grub-install to do the right thing in such a situation.
The kernel already knows about the size of the firmware via
efi_enabled(EFI_64BIT). Add an extra sysfs interface
/sys/firmware/efi/fw_platform_size to expose that information to
userland for low-level utilities to use.
Signed-off-by: Steve McIntyre <steve@einval.com>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Diffstat (limited to 'drivers/acpi/battery.h')
0 files changed, 0 insertions, 0 deletions