Re: [PATCH] x86, microcode, AMD: Add support for family 16h processors

[Boris Ostrovsky]

On 11/15/2012 06:01 PM, Gene Heskett wrote:
> On Thursday 15 November 2012, Henrique de Moraes Holschuh wrote:
> > On Thu, 15 Nov 2012, Boris Ostrovsky wrote:
> > > Add valid patch size for family 16h processors
> > >
> > > Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxx>
> >
> > Is this something that needs to go to -stable ?
>
> IMO, and if I had an oar in this water, yes.  Its been missing since the
> Intel folks started playing with it a couple years back up the log.  I
> have the amd_ucode files in my /lib/firmware tree,
>
> root@coyote:/opt/os9# ls -l /lib/firmware/amd-ucode/
> total 76
> -rw-r--r-- 1 root root   642 2012-01-17 11:50 INSTALL
> -rw-r--r-- 1 root root  9987 2012-01-17 11:50 LICENSE
> -rw-r--r-- 1 root root 12404 2012-01-17 11:50 microcode_amd.bin
> -rw-r--r-- 1 root root  1526 2012-01-17 11:50 microcode_amd.bin.README
> -rw-r--r-- 1 root root  2644 2012-01-17 11:50 microcode_amd_fam15h.bin
> -rw-r--r-- 1 root root   510 2012-01-17 11:50
> microcode_amd_fam15h.bin.README
> -rw-r--r-- 1 root root  2012 2009-01-20 04:48 microcode_amd.phenom-V83
> -rw-r--r-- 1 root root 15020 2012-01-17 11:50 microcode_amd_solaris.bin
> -rw-r--r-- 1 root root  1685 2012-01-17 11:50
> microcode_amd_solaris.bin.README
> -rw-r--r-- 1 root root  6227 2012-01-17 11:50 README
>
> but I can't recall the last time I saw the code sign in during dmesg.
> Old, slow 4 core phenom here.  AMD was forgotten about when the loading
> of it was moved from the kernel options to /etc/init.d/microcode.  For
> an AMD user, that was not a show stopper, but it wasn't a Good Thing(TM)
> either.

One possibility is that BIOS already incorporated all patches (which 
typically is the case) and so the driver doesn't have to do anything.

-boris


> > >   #define F1XH_MPB_MAX_SIZE 2048
> > >   #define F14H_MPB_MAX_SIZE 1824
> > >   #define F15H_MPB_MAX_SIZE 4096
> > >
> > > +#define F16H_MPB_MAX_SIZE 3458
> > >
> > >   	switch (c->x86) {
> > >
> > >   	case 0x14:
> > > @@ -198,6 +199,9 @@ static unsigned int verify_patch_size(int cpu, u32
> > > patch_size,
> > >
> > >   	case 0x15:
> > >   		max_size = F15H_MPB_MAX_SIZE;
> > >   		break;
> > >
> > > +	case 0x16:
> > > +		max_size = F16H_MPB_MAX_SIZE;
> > > +		break;
> > >
> > >   	default:
> > >   		max_size = F1XH_MPB_MAX_SIZE;
> > >   		break;
> >
> > Because it looks like without this patch, some valid microcode updates
> > would be rejected by the kernel...
>
>
> Cheers, Gene

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