Date: Thu, 9 Apr 2015 14:00:11 -0700 From: Kevin Oberman <rkoberman@gmail.com> To: Slawa Olhovchenkov <slw@zxy.spb.ru> Cc: Konstantin Belousov <kostikbel@gmail.com>, Gustau P?rez <gperez@entel.upc.edu>, FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: No IOMMU/DMAR with DELL 3020 Message-ID: <CAN6yY1sYVLoUwaiCUBQfsaDC6eh_=Xes3UqJcREJ0Pc_riOZtg@mail.gmail.com> In-Reply-To: <20150409105026.GH8220@zxy.spb.ru> References: <552635A5.5070707@entel.upc.edu> <20150409082128.GF2390@kib.kiev.ua> <5526381A.3010909@entel.upc.edu> <20150409083512.GG2390@kib.kiev.ua> <20150409085233.GD1394@zxy.spb.ru> <20150409100335.GJ2390@kib.kiev.ua> <20150409105026.GH8220@zxy.spb.ru>
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On Thu, Apr 9, 2015 at 3:50 AM, Slawa Olhovchenkov <slw@zxy.spb.ru> wrote: > On Thu, Apr 09, 2015 at 01:03:35PM +0300, Konstantin Belousov wrote: > > > On Thu, Apr 09, 2015 at 11:52:33AM +0300, Slawa Olhovchenkov wrote: > > > On Thu, Apr 09, 2015 at 11:35:12AM +0300, Konstantin Belousov wrote: > > > > > > > On Thu, Apr 09, 2015 at 10:28:10AM +0200, Gustau P?rez wrote: > > > > > Yup, sorry for the error. I checked the micro in the ark and it > has vt-d: > > > > > > > > > > http://goo.gl/CZZRHz > > > > It only indicates that the CPU/northbridge has the hardware, but > BIOS must > > > > do a work to configure it and to inform the OS about the > configuration. > > > > Your BIOS did not. > > > > > > > > > > > > > > in the bios, there's only one option to enable virtualization > > > > > support, which is ticked. > > > > > > > > > > The complete log is here: > > > > > > > > > > http://dpaste.com/28FDMJQ > > > > > > > > > Dmesg would not give you any useful information there. A DMAR table > > > > is either present, or is it not. In the later case, OS cannot use the > > > > hardware, and if no option in BIOS is present, your only choice is to > > > > complain to the machine/BIOS vendor. > > > > > > May be some OS utilites can do same work? > > > This is theoretically capable? > > > > No, OS must know the peculiarities of the particular chipset. But also, > > Someone may be know this and wrote support in utility. > May be chipset datashit available. > I am don't talk about 'universal, out of box support in OS'. > I am talk about theoretically utility, that perform some operations > after OS load. > > Also, I am interesting by OS-control interleaving memory (in > multi-socket configuration). > This is totaly imposible or just very complex? > I have a system where it is enabled via some BIOS setting that does not make it remotely obvious what it enables VT-d. I've had to ind it three times, once when the system was new, once when I had to send it in for warranty repair and they reset BIOS, and again when the CMOS battery had to be replaced. Every time it took me a while to figure out the magic, but it was there. (No, mine was not a Dell. It was a ZT systems.) -- Kevin Oberman, Network Engineer, Retired E-mail: rkoberman@gmail.com
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