Re: [Xen-API] XCP 1.5: Missing IOMMU- support

[James Bulpin <James.Bulpin@xxxxxxxxxxxxx>]

Hi Johann,

With Xen 4.x iommu support is enabled by default so no additional boot args are 
needed.

It looks like Xen didn't find the ACPI DMAR (IOMMU) table - that would usually 
indicate a lack of support in the BIOS for VT-d. Was that trace from a boot 
before you upgraded to the latest BIOS? If so please can you post a Xen boot 
trace with the latest BIOS. To get maximum info please add "iommu=verbose 
loglvl=all" to the Xen part of the boot command line in /boot/extlinux.conf, 
e.g.:

label xe
  # XenServer
  kernel mboot.c32
  append /boot/xen.gz iommu=verbose loglvl=all mem=1024G dom0_max_vcpus=4 
dom0_mem=752M lowmem_emergency_pool=1M crashkernel=64M@32M console= 
vga=mode-0x0311 --- /boot/vmlinuz-2.6-xen root=LABEL=root-lpnwoiab ro 
xencons=hvc console=hvc0 console=tty0 quiet vga=785 splash --- 
/boot/initrd-2.6-xen.img

What is "SmartVirtualization" - is that Gigabyte/Award speak for VT-d/IOMMU? In 
my experience most BIOS setup programs have an explicit VT-d option (usually 
disabled by default).

Regards,
James

> -----Original Message-----
> From: xen-api-bounces@xxxxxxxxxxxxx [mailto:xen-api-
> bounces@xxxxxxxxxxxxx] On Behalf Of Jóhann Ármann Fannberg
> Sent: 05 September 2012 13:01
> To: xen-api@xxxxxxxxxxxxx
> Subject: Re: [Xen-API] XCP 1.5: Missing IOMMU- support
> 
> Furhter info:
> 
> Found Bios version f13s at Gigabyte- site that supposedly should
> support
> VT-d (in ESXi?), but it has not helped.
> 
> Is there need to specify IOMMU support in Ggrub.conf for XCP 1.5 (Xen
> 4.1.1)? If so, how do I go about it? Can't find /boot/grub/grup.conf.
> 
> 
> Kind regards,
> 
> Johann.
> 
> Þann 4.9.2012 17:24, skrifaði Jóhann Ármann Fannberg:
> > My Hardware/Firmware
> >
> > Gigabyte GA EX58 UD5 Bios version f13 (AwardBIOS) (newest)
> >
> > CPU: I7
> >
> > SmartVirtualization is enabled in Bios.
> >
> >
> > Xen-dmesg output:
> >
> > [root@xenserver-jafi7 ~]# xe host-dmesg
> > (XEN) Bad console= option ''
> ...
> > (XEN) Freed 216kB init memory.
> > (XEN) __csched_vcpu_acct_start: setting dom 0 as the privileged
> domain
> >
> >
> > Seems to me that both CPU and Chipset are listed as supporting VT-d,
> > but motherboard (bios) is not listed as such.
> >
> > Anyhting that can be done? Can I gather further info?
> >
> > Regards,
> >
> > Johann.
> >
> >
> >
> 
> 
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