FWIW, there's a bug in this original implementation. See Konrad's "misc" tree - for the fix: http://git.kernel.org/?p=linux/kernel/git/konrad/xen.git;a=commit;h=f6c958ff0d00ffbf1cdc8fcf2f2a82f06fbbb5f4
Here is the original thread where I submitted the fix: http://markmail.org/message/i2dc4vbqrujkwhu7 On Mon, Nov 26, 2012 at 8:21 AM, Ian Campbell <i...@hellion.org.uk> wrote: > Debian has decided to take Jeremy's microcode patch [0] as an interim > measure for their next release. (TL;DR -- Debian is shipping pvops Linux > 3.2 and Xen 4.1 in the next release. See http://bugs.debian.org/693053 > and https://lists.debian.org/debian-devel/2012/11/msg00141.html for some > more background). > > However the patch is a bit old and predates the use introduction of > separate firmware files for AMD family >= 15h. Looking at the SuSE > forward ported classic Xen patches it seems like the following patch is > all that is required. But it seems a little too simple to be true and I > don't have any such processors to test on. > > Jan, can you recall if it really is that easy on the kernel side ;-) > > Ian. > > [0] > > http://git.kernel.org/?p=linux/kernel/git/jeremy/xen.git;a=shortlog;h=refs/heads/upstream/microcode > > commit 109cf37876567ef346c0ecde8b473e7ad1e74e07 > Author: Ian Campbell <i...@hellion.org.uk> > Date: Mon Nov 26 09:41:02 2012 +0000 > > microcode_xen: Add support for AMD family >= 15h > > Signed-off-by: Ian Campbell <i...@hellion.org.uk> > > diff --git a/arch/x86/kernel/microcode_xen.c > b/arch/x86/kernel/microcode_xen.c > index 9d2a06b..2b8a78a 100644 > --- a/arch/x86/kernel/microcode_xen.c > +++ b/arch/x86/kernel/microcode_xen.c > @@ -74,7 +74,11 @@ static enum ucode_state xen_request_microcode_fw(int > cpu, struct device *device) > break; > > case X86_VENDOR_AMD: > - snprintf(name, sizeof(name), > "amd-ucode/microcode_amd.bin"); > + /* Beginning with family 15h AMD uses family-specific > firmware files. */ > + if (c->x86 >= 0x15) > + snprintf(name, sizeof(name), > "amd-ucode/microcode_amd_fam%.2xh.bin", c->x86); > + else > + snprintf(name, sizeof(name), > "amd-ucode/microcode_amd.bin"); > break; > > default: > > > -- > Ian Campbell > Current Noise: Dew-Scented - Metal Militia > > Now KEN and BARBIE are PERMANENTLY ADDICTED to MIND-ALTERING DRUGS ... > > > _______________________________________________ > Xen-devel mailing list > xen-de...@lists.xen.org > http://lists.xen.org/xen-devel >
