[PATCH v4 4/4 update] Passing efi related data via setup_data

[Toshi Kani]

On Mon, 2013-12-30 at 15:16 +0800, Dave Young wrote:
> For supporting efi runtime, several efi physical addresses
> fw_vendor, runtime, config tables, smbios and the whole runtime
> mapping info need to be used in kexec kernel. Thus introduce
> setup_data struct for passing these data.
> 
> collect the varialbes from /sys/firmware/efi/systab and
> /sys/firmware/efi/runtime-map
> 
> Tested on qemu+ovmf, dell laptop, lenovo laptop and HP workstation.
> 
> v1->v2:
> HPA: use uint*_t instead of __uint*_t
> Simon: indention fix; fix a memory leak
> move offset change update to previous patch in setup header
> only passing setup_data when the bzImage support efi boot
> Vivek: export a value in bzImage probe so it can be used
>       to check if we should pass acpi_rsdp.
> coding style
> 
> v2->v3:
> code cleanup
> bail out if efi mm desc_version != 1
> bhe: define macro for SETUP_EFI
>      break loop if find matched string in systab.
> 
> v3->v4:
> update memmap in efi_info to the saved runtime map
> So kernel side can iterate them as normal boot.
> 
> v4->v5:
> simplify function get_efi_value(), add error handling
> realloc error handling
> move map[0] out of efi_setup_data since memmap addr is set in efi_info
> 
> Signed-off-by: Dave Young <dyoung at redhat.com>

Tested-by: Toshi Kani <toshi.kani at hp.com>

Thanks,
Toshi