Re: IOMMU/AMD-Vi not working after XSA-36 with 970A-UD3

[Marcus Osdoba <marcus.osdoba@googlemail.com>]

Am 04.05.2013 02:09, schrieb Eric Shelton:
> Did you try the xen boot option mentioned in XSA-36?
>
> iommu=amd-iommu-perdev-intremap
>
> Add it to the line in grub.conf for the hypervisor (e.g., "kernel
> /boot/xen.gz dom0_mem=2048M iommu=1,no-amd-iommu-perdev-intremap")
Hello Eric,

Thanks for the hint. Unfortuantly this wasn't a solution as reported in 
[0]. Even with the option "no-amd-iommu-perdev-intremap" the I/O 
virtualisation remains disabled (xm dmesg output see below).

Regards,
Marcus

[0] http://lists.xen.org/archives/html/xen-devel/2013-03/msg01016.html

(XEN) Xen version 4.1.4 (Debian 4.1.4-3) (waldi@debian.org) (gcc version 
4.7.2 (Debian 4.7.2-5) ) Fri Apr 19 13:32:48 UTC 2013
(XEN) Bootloader: GRUB 1.99-27+deb7u1
(XEN) Command line: placeholder com1=115200,8n1 console=com1 
iommu=verbose,no-amd-iommu-perdev-intremap dom0_mem=768M
(XEN) Video information:
(XEN)  VGA is text mode 80x25, font 8x16
(XEN)  VBE/DDC methods: V2; EDID transfer time: 1 seconds
(XEN)  EDID info not retrieved because of reasons unknown
(XEN) Disc information:
(XEN)  Found 3 MBR signatures
(XEN)  Found 3 EDD information structures
(XEN) Xen-e820 RAM map:
(XEN)  0000000000000000 - 0000000000098800 (usable)
(XEN)  000000000009f800 - 00000000000a0000 (reserved)
(XEN)  00000000000f0000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 00000000cfda0000 (usable)
(XEN)  00000000cfda0000 - 00000000cfdd1000 (ACPI NVS)
(XEN)  00000000cfdd1000 - 00000000cfe00000 (ACPI data)
(XEN)  00000000cfe00000 - 00000000cff00000 (reserved)
(XEN)  00000000e0000000 - 00000000f0000000 (reserved)
(XEN)  00000000fec00000 - 0000000100000000 (reserved)
(XEN)  0000000100000000 - 0000000130000000 (usable)
(XEN) ACPI: RSDP 000F6B80, 0014 (r0 GBT   )
(XEN) ACPI: RSDT CFDD1000, 004C (r1 GBT    GBTUACPI 42302E31 GBTU  1010101)
(XEN) ACPI: FACP CFDD1080, 0074 (r1 GBT    GBTUACPI 42302E31 GBTU  1010101)
(XEN) ACPI: DSDT CFDD1100, 792A (r1 GBT    GBTUACPI     1000 MSFT  3000000)
(XEN) ACPI: FACS CFDA0000, 0040
(XEN) ACPI: SSDT CFDD8B00, 0544 (r1 PTLTD  POWERNOW        1  LTP        1)
(XEN) ACPI: MSDM CFDD9080, 0055 (r3 GBT    GBTUACPI 42302E31 GBTU  1010101)
(XEN) ACPI: HPET CFDD9100, 0038 (r1 GBT    GBTUACPI 42302E31 GBTU       98)
(XEN) ACPI: MCFG CFDD9140, 003C (r1 GBT    GBTUACPI 42302E31 GBTU  1010101)
(XEN) ACPI: MATS CFDD91C0, 0034 (r1 GBT                    0             0)
(XEN) ACPI: TAMG CFDD9230, 0202 (r1 GBT    GBT   B0 5455312E BG^A^A 
53450101)
(XEN) ACPI: APIC CFDD8A40, 00BC (r1 GBT    GBTUACPI 42302E31 GBTU  1010101)
(XEN) ACPI: MATS CFDD9440, 61FD (r1        MATS RCM 80000001 INTL 20061109)
(XEN) ACPI: IVRS CFDDF6B0, 00E0 (r1  AMD     RD890S   202031 AMD         0)
(XEN) System RAM: 4093MB (4191456kB)
(XEN) Domain heap initialised
(XEN) Processor #0 0:6 APIC version 16
(XEN) Processor #1 0:6 APIC version 16
(XEN) IOAPIC[0]: apic_id 8, version 33, address 0xfec00000, GSI 0-23
(XEN) Enabling APIC mode:  Flat.  Using 1 I/O APICs
(XEN) Table is not found!
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Detected 2818.986 MHz processor.
(XEN) Initing memory sharing.
(XEN) IVHD Error: Conflicting IO-APIC 0x8 entries
(XEN) AMD-Vi: Error initialization
(XEN) I/O virtualisation disabled
(XEN) ENABLING IO-APIC IRQs
(XEN)  -> Using new ACK method
(XEN) Platform timer is 14.318MHz HPET
(XEN) Allocated console ring of 16 KiB.
(XEN) HVM: ASIDs enabled.
(XEN) SVM: Supported advanced features:
(XEN)  - Nested Page Tables (NPT)
(XEN)  - Last Branch Record (LBR) Virtualisation
(XEN)  - Next-RIP Saved on #VMEXIT
(XEN) HVM: SVM enabled
(XEN) HVM: Hardware Assisted Paging (HAP) detected
(XEN) HVM: HAP page sizes: 4kB, 2MB, 1GB
(XEN) Brought up 2 CPUs
(XEN) do_IRQ: 1.231 No irq handler for vector (irq -1)
(XEN) Xenoprofile: AMD IBS detected (0x0000001f)
(XEN) *** LOADING DOMAIN 0 ***
(XEN)  Xen  kernel: 64-bit, lsb, compat32