Roger Pau Monné wrote on 05/13/15 11:14:
Hello,
El 13/05/15 a les 10.04, Ruslan Makhmatkhanov ha escrit:
Roger Pau Monné wrote on 05/12/15 18:50:
Hello,
El 12/05/15 a les 17.20, Ruslan Makhmatkhanov ha escrit:
Hello,
we have machine with VT-d and EPT-capable CPU:
Intel(R) Xeon(R) CPU E5504 [1]
The system is FreeBSD 11.0-CURRENT r282694 installed from
ftp.freebsd.org iso.
But dom0 fails to boot at this hardware with "iommu must be enabled for
PVH hardware domain" [2]. VT-d support is indeed not detected at kernel
level. Here is dmesg with VT-d enabled in BIOS [3] and dmesg with VT-d
disabled in BIOS [4]. It's look like there is no difference on both
outputs. Here is the proofpic of that the system is VT-d capable and the
support is enabled in BIOS [5]. Here is acpidump -t output [6]
My bet right now is be that Xen detects that your IOMMU contains erratas
and disables it. Can you add "iommu=debug,force" to your xen_cmdline and
try again?
Also, can you paste the contents of your /boot/loader.conf?
Roger.
You are right:
[VT-D] Disabling IOMMU due to Intel 5500/5520/X58 Chipset errata #47, #53
and after that:
----------------------------------------------
Panic on CPU 0:
Couldn't enable IOMMU and iommu=required/force
----------------------------------------------
Reboot in five seconds.
But what this means practically? Some chipset bugs preventing us to use
this feature. Can this circumvented somehow? Thanks.
AFAIK iommu=force should force the usage of the IOMMU even if erratas
are detected. You can also try with iommu=force,no-intremap.
Roger.
Yes, the system is now booted successfully! But `xl list` doesn't work with:
root@:~ # xl list
libxl: error: libxl.c:669:libxl_list_domain: getting domain info list:
Cannot allocate memory
libxl_list_domain failed.
I googled for this error, and make ktrace/kdump on `xl list`. Here is
the output: https://dpaste.de/mAyX/raw
It referencing many shared libraries, that is not available on this
system. Dunno if this is cause of problem.
And here is the `xl info` and `xl dmesg`: https://dpaste.de/H1dV/raw
Max wired pages is unlimited:
root@:~ # sysctl vm.max_wired
vm.max_wired: -1
Also tried to set: vm.max_wired=1048576, but error is the same.
Shell memory values are unlimited too:
root@:~ # ulimit -a
cpu time (seconds, -t) unlimited
file size (512-blocks, -f) unlimited
data seg size (kbytes, -d) 33554432
stack size (kbytes, -s) 524288
core file size (512-blocks, -c) unlimited
max memory size (kbytes, -m) unlimited
locked memory (kbytes, -l) 64
max user processes (-u) 6656
open files (-n) 57987
virtual mem size (kbytes, -v) unlimited
swap limit (kbytes, -w) unlimited
sbsize (bytes, -b) unlimited
pseudo-terminals (-p) unlimited
kqueues (-k) unlimited
The same error when we trying to create new guest domain:
http://dpaste.com/1PD63M9
Domain configuration is taken here:
http://wiki.xen.org/wiki/FreeBSD_Dom0
Can anything be done to solve this? Thank you.
--
Regards,
Ruslan
T.O.S. Of Reality
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