Date: Wed, 10 Aug 2016 06:44:13 -0700 From: John Baldwin <jhb@freebsd.org> To: Konstantin Belousov <kostikbel@gmail.com> Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r303887 - head/tools/tools/dmardump Message-ID: <1854803.Mj8doirhqg@ralph.baldwin.cx> In-Reply-To: <20160810074303.GC83214@kib.kiev.ua> References: <201608091906.u79J65Uq058283@repo.freebsd.org> <73543582.oU1jbu7riv@ralph.baldwin.cx> <20160810074303.GC83214@kib.kiev.ua>
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On Wednesday, August 10, 2016 10:43:03 AM Konstantin Belousov wrote: > On Tue, Aug 09, 2016 at 02:22:36PM -0700, John Baldwin wrote: > > On Tuesday, August 09, 2016 07:06:05 PM John Baldwin wrote: > > > Author: jhb > > > Date: Tue Aug 9 19:06:05 2016 > > > New Revision: 303887 > > > URL: https://svnweb.freebsd.org/changeset/base/303887 > > > > > > Log: > > > Add a dmardump utility to dump the VT-d context tables. > > > > > > This tool parses the ACPI DMAR table looking for DMA remapping devices. > > > For each device it walks the root table and any context tables > > > referenced to display mapping info for PCI devices. > > > > > > Note that acpidump -t already parses the info in the ACPI DMAR tables > > > directly. This tool examines some of the data structures the DMAR > > > remapping engines use to translate DMA requests. > > > > > > Reviewed by: kib, grehan > > > MFC after: 1 month > > > Sponsored by: Chelsio Communications > > > Differential Revision: https://reviews.freebsd.org/D7444 > > > > I should have mentioned that this tool only supports "normal" context > > entry tables. It does not (yet) support extended context entry > > tables. However, neither bhyve nor ACPI_DMAR create extended context > > entry tables. > > I am not aware of existence of hardware supporting the extended context > entries. Even Skykale E3 v5 Xeons report ECS == 0. That's completely fair, I was just going by what was in the recent spec. I don't think it's worth implementing until anything actually uses it certainly. -- John Baldwin
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