From: ewheeler <kvm@ew.ewheeler.org>
To: kvm@vger.kernel.org
Subject: PCIe VGA Passthrough works---almost
Date: Fri, 23 Jul 2010 15:40:56 -0700 [thread overview]
Message-ID: <1279924856.26431.88.camel@geektop> (raw)
Hello all,
I have DMAR working for a couple PCI devices (USB and Digium FXS/FXO
card) and thought, why not try to pass the nVidia PCIe card into the
guest OS.
As I understand, KVM is not ready to boot a DMAR video device as the
primary display---and I wondered if I could load the card as a
non-primary fbconsole using the 'nouveau' module with "-vga none" set.
To my surprise, it initialized the card and displayed console messages
on the DMAR-passed nVidia card's nouveau fbconsole.
However, I get a stream of KVM internal errors on the tty that KVM is
launched from:
KVM internal error. Suberror: 1
RAX=0000000002659360 RBX=0000000002659360 RCX=0000000000000000 RDX=9393939393939393
RSI=00000000ffffff93 RDI=0000000002659fe0 RBP=0000000000000fe0 RSP=00007fff7133b708
R8 =00000000000002e0 R9 =0000000000200000 R10=0000000000000000 R11=00007f744d8aabf0
R12=0000000000000000 R13=0000000002658240 R14=00000000026591f0 R15=0000000000000003
RIP=00007f744d8ab284 RFL=00010206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0
ES =0000 0000000000000000 ffffffff 00000000
CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA]
SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA]
DS =0000 0000000000000000 ffffffff 00000000
FS =0000 00007f744ddb5700 ffffffff 00000000
GS =0000 0000000000000000 ffffffff 00000000
LDT=0000 0000000000000000 ffffffff 00000000
TR =0040 ffff880001c13780 00002087 00008b00 DPL=0 TSS64-busy
GDT= ffff880001c04000 0000007f
IDT= ffffffff81941000 00000fff
CR0=80050033 CR2=000000000265a348 CR3=000000001d116000 CR4=000006f0
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
EFER=0000000000000d01
emulation failure
[ ... repeated identically, thousands of times ]
I am happy to test patches---please let me know if you have any
questions.
It looks like VGA DMAR passthrough as a non-primary display almost
works. I'm using today's git of kvm with the vmlinuz and initrd from
the Ubuntu 10.04 x64 live cd:
qemu-system-x86_64 -m 512 \
-pcidevice host=01:00.0,name=n01000 \
-pcidevice host=01:00.1,name=n01001 \
-kernel vmlinuz -initrd initrd.lz \
-append '1 video=map:0 boot=casper' \
-cdrom /dev/sr0 \
-vga none
-Eric
reply other threads:[~2010-07-23 22:40 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1279924856.26431.88.camel@geektop \
--to=kvm@ew.ewheeler.org \
--cc=kvm@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox