[Xen-users] iommu=verbose

[Sergey Zhukov <svg@xxxxxx>]

I'm trying to figure out why IO virtualization disabled. I added
iommu=verbose to command line, but still not get any additional info
about vt-d. 

OS: Ubuntu 12.04 beta with Xen from repositories.

xm dmesg


(XEN) Xen version 4.1.2 (Ubuntu 4.1.2-2ubuntu2)
(stefan.bader@xxxxxxxxxxxxx) (gcc version 4.6.3 (Ubuntu/Linaro
4.6.3-1ubuntu2) ) Thu Mar  8 14:31:11 UTC 2012
(XEN) Bootloader: GRUB 1.99-18ubuntu1
(XEN) Command line: placeholder iommu=verbose
(XEN) Video information:
(XEN)  VGA is text mode 80x25, font 8x16
(XEN)  VBE/DDC methods: none; EDID transfer time: 0 seconds
(XEN)  EDID info not retrieved because no DDC retrieval method detected
(XEN) Disc information:
(XEN)  Found 1 MBR signatures
(XEN)  Found 1 EDD information structures
(XEN) Xen-e820 RAM map:
(XEN)  0000000000000000 - 000000000009ec00 (usable)
(XEN)  000000000009ec00 - 00000000000a0000 (reserved)
(XEN)  00000000000e0000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 0000000020000000 (usable)
(XEN)  0000000020000000 - 0000000020200000 (reserved)
(XEN)  0000000020200000 - 0000000040000000 (usable)
(XEN)  0000000040000000 - 0000000040200000 (reserved)
(XEN)  0000000040200000 - 00000000babc3000 (usable)
(XEN)  00000000babc3000 - 00000000bac0c000 (ACPI NVS)
(XEN)  00000000bac0c000 - 00000000bacc4000 (reserved)
(XEN)  00000000bacc4000 - 00000000baccc000 (ACPI data)
(XEN)  00000000baccc000 - 00000000bacf3000 (reserved)
(XEN)  00000000bacf3000 - 00000000bacf5000 (usable)
(XEN)  00000000bacf5000 - 00000000bad05000 (reserved)
(XEN)  00000000bad05000 - 00000000bad13000 (ACPI NVS)
(XEN)  00000000bad13000 - 00000000bad38000 (reserved)
(XEN)  00000000bad38000 - 00000000bad7b000 (ACPI NVS)
(XEN)  00000000bad7b000 - 00000000bb000000 (usable)
(XEN)  00000000bb800000 - 00000000bfa00000 (reserved)
(XEN)  00000000fed1c000 - 00000000fed40000 (reserved)
(XEN)  00000000ff000000 - 0000000100000000 (reserved)
(XEN)  0000000100000000 - 000000043fe00000 (usable)
(XEN) ACPI: RSDP 000F0450, 0024 (r2 ALASKA)
(XEN) ACPI: XSDT BACC4070, 005C (r1 ALASKA    A M I  1072009 AMI
10013)
(XEN) ACPI: FACP BACCB4A0, 00F4 (r4 ALASKA    A M I  1072009 AMI
10013)
(XEN) ACPI: DSDT BACC4158, 7348 (r2 ALASKA    A M I       15 INTL
20051117)
(XEN) ACPI: FACS BAD0AF80, 0040
(XEN) ACPI: APIC BACCB598, 0072 (r3 ALASKA    A M I  1072009 AMI
10013)
(XEN) ACPI: SSDT BACCB610, 0102 (r1 AMICPU     PROC        1 MSFT
3000001)
(XEN) ACPI: MCFG BACCB718, 003C (r1 ALASKA    A M I  1072009 MSFT
97)
(XEN) ACPI: HPET BACCB758, 0038 (r1 ALASKA    A M I  1072009 AMI.
4)
(XEN) ACPI: ASF! BACCB790, 00A0 (r32 INTEL       HCG        1 TFSM
F4240)
(XEN) ACPI: BGRT BACCB830, 003C (r0 ALASKA    A M I  1072009 AMI
10013)
(XEN) System RAM: 16295MB (16687008kB)
(XEN) Domain heap initialised
(XEN) ACPI: 32/64X FACS address mismatch in FADT -
bad0af80/0000000000000000, using 32
(XEN) Processor #0 6:10 APIC version 21
(XEN) Processor #2 6:10 APIC version 21
(XEN) Processor #4 6:10 APIC version 21
(XEN) Processor #6 6:10 APIC version 21
(XEN) IOAPIC[0]: apic_id 0, version 32, address 0xfec00000, GSI 0-23
(XEN) Enabling APIC mode:  Flat.  Using 1 I/O APICs
(XEN) Table is not found!
(XEN) Not enabling x2APIC: depends on iommu_supports_eim.
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Detected 3292.556 MHz processor.
(XEN) Initing memory sharing.
(XEN) I/O virtualisation disabled
(XEN) Enabled directed EOI with ioapic_ack_old on!
(XEN) ENABLING IO-APIC IRQs
(XEN)  -> Using old ACK method
(XEN) Platform timer is 14.318MHz HPET
(XEN) Allocated console ring of 16 KiB.
(XEN) VMX: Supported advanced features:
(XEN)  - APIC MMIO access virtualisation
(XEN)  - APIC TPR shadow
(XEN)  - Extended Page Tables (EPT)
(XEN)  - Virtual-Processor Identifiers (VPID)
(XEN)  - Virtual NMI
(XEN)  - MSR direct-access bitmap
(XEN)  - Unrestricted Guest
(XEN) EPT supports 2MB super page.
(XEN) HVM: ASIDs enabled.
(XEN) HVM: VMX enabled
(XEN) HVM: Hardware Assisted Paging detected.
(XEN) Brought up 4 CPUs
(XEN) *** LOADING DOMAIN 0 ***
(XEN)  Xen  kernel: 64-bit, lsb, compat32
(XEN)  Dom0 kernel: 64-bit, PAE, lsb, paddr 0x1000000 -> 0x2060000
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN)  Dom0 alloc.:   0000000428000000->0000000430000000 (4049834 pages
to be allocated)
(XEN)  Init. ramdisk: 000000043d6e6000->000000043fdff600
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN)  Loaded kernel: ffffffff81000000->ffffffff82060000
(XEN)  Init. ramdisk: ffffffff82060000->ffffffff84779600
(XEN)  Phys-Mach map: ffffffff8477a000->ffffffff866b3620
(XEN)  Start info:    ffffffff866b4000->ffffffff866b44b4
(XEN)  Page tables:   ffffffff866b5000->ffffffff866ec000
(XEN)  Boot stack:    ffffffff866ec000->ffffffff866ed000
(XEN)  TOTAL:         ffffffff80000000->ffffffff86800000
(XEN)  ENTRY ADDRESS: ffffffff81cfc200
(XEN) Dom0 has maximum 4 VCPUs
(XEN) Scrubbing Free RAM: .done.
(XEN) Xen trace buffers: disabled
(XEN) Std. Loglevel: Errors and warnings
(XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings)
(XEN) Xen is relinquishing VGA console.
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch
input to Xen)
(XEN) Freed 220kB init memory.
(XEN) physdev.c:155: dom0: wrong map_pirq type 3



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