RE: Re: [PATCH v2 3/3] efi: Capsule update with user helper interface

[Kweh, Hock Leong]

> -----Original Message-----
> From: Borislav Petkov [mailto:bp@xxxxxxxxx]
> Sent: Wednesday, February 25, 2015 7:48 PM
> 
> On Tue, Feb 24, 2015 at 12:49:09PM +0000, Kweh, Hock Leong wrote:
> 
> So this sounds pretty overengineered for no reason, or maybe I'm missing
> the reason.
> 
> If I had to give an example from the microcode loader, what we do there
> is put the microcode in /lib/firmware/... and do
> 
> echo 1 > /sys/devices/system/cpu/microcode/reload
> 
> which goes and calls reload_store() in
> arch/x86/kernel/cpu/microcode/core.c which grabs a mutex, disables CPU
> hotplug, etc, etc...
> 
> And this mechanism is as simple as it can get. Maybe capsules can be
> loaded like that too?
> 
> Error code can be propagated too, if needed, of course.
> 
> --
> Regards/Gruss,
>     Boris.
> 
> ECO tip #101: Trim your mails when you reply.
> --

Hi Boris,

The reason we use this interface for efi capsule is that efi capsule
support multi binaries to be uploaded and each binary file name
can be different.


Regards,
Wilson