Date: Wed, 22 May 2019 13:25:39 -0700 From: Conrad Meyer <cem@freebsd.org> To: John Baldwin <jhb@freebsd.org> Cc: Andriy Gapon <avg@freebsd.org>, src-committers <src-committers@freebsd.org>, svn-src-all <svn-src-all@freebsd.org>, svn-src-head <svn-src-head@freebsd.org> Subject: Re: svn commit: r348109 - in head/sys/x86: include x86 Message-ID: <CAG6CVpXYhHT0gpJF2H_gKNJ0gcCkMwZyKP_d8EwWGUX5LgXTng@mail.gmail.com> In-Reply-To: <32532943-6b1a-71cc-1d95-f180927eb187@FreeBSD.org> References: <201905221344.x4MDiGGV056469@repo.freebsd.org> <00116a41-d811-cda9-304e-589738c54508@FreeBSD.org> <CAG6CVpUWSTfdrDvQ0DhNND6Xu5MqdxrE=5qgDGV3brJQYDHXFg@mail.gmail.com> <32532943-6b1a-71cc-1d95-f180927eb187@FreeBSD.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wed, May 22, 2019 at 12:59 PM John Baldwin <jhb@freebsd.org> wrote: > On 5/22/19 12:12 PM, Conrad Meyer wrote: > > On Wed, May 22, 2019 at 11:06 AM Andriy Gapon <avg@freebsd.org> wrote: > >> > >> On 22/05/2019 16:44, Andrew Gallatin wrote: > >>> This is needed for AMD SMCA processors, as SMCA uses different > >>> MSR address for access MCA banks. > >> > >> Just curious, what is SMCA? > > > > Scalable MCA. It's a set of AMD Fam17h MCA extensions. > > How is it different aside from using different MSR numbers (which seems > a bit gratuitous if that is really all the change is). > > -- > John Baldwin > It adds new MSRs as well, though those are not present in this first change. And adds some information not representable in the =E2=80=9Clegacy= =E2=80=9D MSRs. Some more detail can be found in the linux patches, eg https://lore.kernel.org/patchwork/patch/655889/ .
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?CAG6CVpXYhHT0gpJF2H_gKNJ0gcCkMwZyKP_d8EwWGUX5LgXTng>