Re: [PATCH v4 05/12] efi: export more efi table variable to sysfs

Matt Fleming
2013-11-26T15:57:31Z

On Tue, 26 Nov, at 01:57:50PM, Dave Young wrote:
> Export fw_vendor, runtime and config tables physical
> addresses to /sys/firmware/efi/systab becaue kexec
> kernel will need them.

This commit log needs updating.

> 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.
>
> changelog:
> Greg: add standalone sysfs files instead of add lines to systab
> Document them as testing ABI
> Greg: use group attrs and is_visible
> Boris: align comments lines
>
> Signed-off-by: Dave Young <dyoung-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> ---
> Documentation/ABI/testing/sysfs-firmware-efi | 26 ++++++++++++++++
> arch/x86/platform/efi/efi.c | 4 +++
> drivers/firmware/efi/efi.c | 44 ++++++++++++++++++++++++++++
> include/linux/efi.h | 3 ++
> 4 files changed, 77 insertions(+)
> create mode 100644 Documentation/ABI/testing/sysfs-firmware-efi
>
> diff --git a/Documentation/ABI/testing/sysfs-firmware-efi b/Documentation/ABI/testing/sysfs-firmware-efi
> new file mode 100644
> index 0000000..9252a24
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-firmware-efi
> @@ -0,0 +1,26 @@
> +What: /sys/firmware/efi/fw_vendor
> +Date: Nov 2013
> +Contact: Dave Young <dyoung-8RVElS0ezzQdnm+yROfE0A@public.gmane.org>

redhat.org eh? Typo or legit?

> +Description:
> + Shows the physical address of firmware vendor in the EFI
> + system table.

It shows the physical address of the firmware vendor "entry" or "field"
in the EFI system table.

> +Users:
> + Kexec Mailing List <kexec-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>

The "Kexec mailing list" isn't a user, kexec is.

--
Matt Fleming, Intel Open Source Technology Center