Re: [PATCH] sparc64: add bios boot partition support

[Eric Snowberg]

> On Mar 6, 2019, at 3:52 AM, Daniel Kiper <address@hidden> wrote:
> 
> On Mon, Mar 04, 2019 at 05:34:01PM -0800, Eric Snowberg wrote:
>> Add BIOS Boot Partition support for sparc64 platforms.  This will work a
>> little different than x86.  With GPT, both the OBP "load" and "boot" commands
>> are partition aware and neither command can see the partition table.  
>> Therefore
>> the entire boot-loader is stored within the BIOS Boot Partition and nothing
>> is stored within the bootstrap code area of MBR.
>> 
>> To use it, the end user will issue the boot command with the path pointing to
>> the BIOS Boot Partition.
>> 
>> For example with the disk below:
>> 
>> Model: Unknown (unknown)
>> Disk /dev/nvme1n1: 1600GB
>> Sector size (logical/physical): 512B/512B
>> Partition Table: gpt
>> 
>> Number  Start   End     Size    File system  Name  Flags
>> 1      1049kB  1075MB  1074MB   ext3
>> 2      1075MB  1076MB  1049kB                     bios_grub
>> 3      1076MB  1600GB  1599GB                     lvm
>> 
>> To boot grub2 from OBP, you would use:
>> 
>> boot 
>> /address@hidden/address@hidden/address@hidden/address@hidden/address@hidden/address@hidden:b
>> 
>> Signed-off-by: Eric Snowberg <address@hidden>
> 
> Have you tested this patch on the other platforms?
> If yes then I am OK with the patch.
> 

It has been tested on x86 and SPARC.  It is my understanding that x86 and SPARC 
are the only two platforms that can use this file.  If that is not correct, let 
me know.