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[Xen-users] pci passthrough under xen-3.3 without VT-d

From: "Benjamin Huntsman" <BHuntsman@xxxxxxxxxxxxxxxxxxxxx>

Date: Mon, 15 Dec 2008 14:38:33 -0800

Delivery-date: Wed, 17 Dec 2008 09:09:40 -0800

List-id: Xen user discussion <xen-users.lists.xensource.com>

Thread-index: AclfBdx1O70ZHZ9TRkaSRoU+umroAQ==

Thread-topic: pci passthrough under xen-3.3 without VT-d

Hi all! I'm hoping someone here might be able to help. I'm familiar with several UNIX'es, though farily new to Linux... I'm running RHEL 5.2. I've got the RHEL kernel headers installed, etc, and compiled xen-3.3. Once that was built, I rebuilt libvirt, etc, the kernel, and all the modules. The whole mess boots and runs fine... mostly. My hardware is a Dell OptiPlex 745, Intel Core2 Duo, though the board doesn't have VT-d capabilities. Vitalization is otherwise enabled in the BIOS. I have a PCI NIC and PCI VGA card I want to pass through to a guest. I have pciback built as a module, and it's preloaded in my initrd. As I understand it though, even w/o VT-d, I should still be able to do PCI passthrough, right? Here's the config details (pardon the verbosity): from /boot/grub/menu.lst: ... title Red Hat Enterprise Linux Server (2.6.18-92.1.18.el6xen)(Xen-3.3.0) root (hd0,1) kernel /xen-3.3.0.gz iommu=1 vtd=1 module /vmlinuz-2.6.18-92.1.18.el5xen ro root=/dev/VolGroup00/LogVol00 rhgb quiet module /initrd-2.6.18-92.1.18.el5xen.img ... from /etc/modprobe.conf: ... install e100 /sbin/modprobe pciback ; /sbin/modprobe --first-time --ignore-install e100 options pciback hide=(04:00.0)(04:02.0) ... [root@hx80kc1 ~]# dmesg | grep pciback pciback 0000:04:02.0: seizing device pciback 0000:04:00.0: seizing device [root@hx80kc1 ~]# [root@hx80kc1 ~]# xm dmesg __ __ _____ _____ ___ \ \/ /___ _ __ |___ / |___ / / _ \ \ // _ \ '_ \ |_ \ |_ \| | | | / \ __/ | | | ___) | ___) | |_| | /_/\_\___|_| |_| |____(_)____(_)___/ (XEN) Xen version 3.3.0 (root@xxxxxxxxxxxxxxx) (gcc version 4.1.2 20071124 (Red Hat 4.1.2-42)) Fri Dec 5 17:21:39 PST 2008 (XEN) Latest ChangeSet: unavailable (XEN) Command line: iommu=1 vtd=1 (XEN) Video information: (XEN) VGA is text mode 80x25, font 8x16 (XEN) VBE/DDC methods: V2; EDID transfer time: 1 seconds (XEN) Disc information: (XEN) Found 1 MBR signatures (XEN) Found 1 EDD information structures (XEN) Xen-e820 RAM map: (XEN) 0000000000000000 - 000000000009fc00 (usable) (XEN) 00000000000f0000 - 0000000000100000 (reserved) (XEN) 0000000000100000 - 00000000bfdffc00 (usable) (XEN) 00000000bfdffc00 - 00000000bfe01c00 (ACPI NVS) (XEN) 00000000bfe03c00 - 00000000bfe53c00 (reserved) (XEN) 00000000bfe53c00 - 00000000bfe55c00 (ACPI data) (XEN) 00000000bfe55c00 - 00000000c0000000 (reserved) (XEN) 00000000e0000000 - 00000000f0000000 (reserved) (XEN) 00000000fec00000 - 00000000fed00400 (reserved) (XEN) 00000000fed20000 - 00000000feda0000 (reserved) (XEN) 00000000fee00000 - 00000000fef00000 (reserved) (XEN) 00000000ffb00000 - 0000000100000000 (reserved) (XEN) 0000000100000000 - 000000013c000000 (usable) (XEN) System RAM: 4029MB (4126328kB) (XEN) ACPI: RSDP 000FEBF0, 0024 (r2 DELL ) (XEN) ACPI: XSDT 000FCE90, 006C (r1 DELL B8K 14 ASL 61) (XEN) ACPI: FACP 000FCFB8, 00F4 (r3 DELL B8K 14 ASL 61) (XEN) ACPI: DSDT FFF69C33, 4757 (r1 DELL dt_ex 1000 INTL 20050624) (XEN) ACPI: FACS BFDFFC00, 0040 (XEN) ACPI: SSDT FFF6E662, 009A (r1 DELL st_ex 1000 INTL 20050624) (XEN) ACPI: APIC 000FD0AC, 0092 (r1 DELL B8K 14 ASL 61) (XEN) ACPI: BOOT 000FD13E, 0028 (r1 DELL B8K 14 ASL 61) (XEN) ACPI: ASF! 000FD166, 0092 (r32 DELL B8K 14 ASL 61) (XEN) ACPI: MCFG 000FD1F8, 003E (r1 DELL B8K 14 ASL 61) (XEN) ACPI: HPET 000FD236, 0038 (r1 DELL B8K 14 ASL 61) (XEN) ACPI: TCPA 000FD492, 0032 (r1 DELL B8K 14 ASL 61) (XEN) ACPI: SLIC 000FD26E, 0176 (r1 DELL B8K 14 ASL 61) (XEN) Xen heap: 14MB (14624kB) (XEN) Domain heap initialised (XEN) Processor #0 6:15 APIC version 20 (XEN) Processor #1 6:15 APIC version 20 (XEN) IOAPIC[0]: apic_id 8, version 32, address 0xfec00000, GSI 0-23 (XEN) Enabling APIC mode: Flat. Using 1 I/O APICs (XEN) Using scheduler: SMP Credit Scheduler (credit) (XEN) Detected 2126.508 MHz processor. (XEN) HVM: VMX enabled (XEN) CPU0: Intel(R) Core(TM)2 CPU 6400 @ 2.13GHz stepping 06 (XEN) Booting processor 1/1 eip 8c000 (XEN) CPU1: Intel(R) Core(TM)2 CPU 6400 @ 2.13GHz stepping 06 (XEN) Total of 2 processors activated. (XEN) ENABLING IO-APIC IRQs (XEN) -> Using new ACK method (XEN) checking TSC synchronization across 2 CPUs: passed. (XEN) Platform timer is 14.318MHz HPET (XEN) Brought up 2 CPUs (XEN) I/O virtualisation disabled (XEN) *** LOADING DOMAIN 0 *** (XEN) Xen kernel: 64-bit, lsb, compat32 (XEN) Dom0 kernel: 64-bit, lsb, paddr 0xffffffff80200000 -> 0xffffffff807014e4 (XEN) PHYSICAL MEMORY ARRANGEMENT: (XEN) Dom0 alloc.: 0000000134000000->0000000136000000 (969614 pages to be allocated) (XEN) VIRTUAL MEMORY ARRANGEMENT: (XEN) Loaded kernel: ffffffff80200000->ffffffff807014e4 (XEN) Init. ramdisk: ffffffff80702000->ffffffff80ea6000 (XEN) Phys-Mach map: ffffffff80ea6000->ffffffff8161bc70 (XEN) Start info: ffffffff8161c000->ffffffff8161c4a4 (XEN) Page tables: ffffffff8161d000->ffffffff8162c000 (XEN) Boot stack: ffffffff8162c000->ffffffff8162d000 (XEN) TOTAL: ffffffff80000000->ffffffff81800000 (XEN) ENTRY ADDRESS: ffffffff80200000 (XEN) Dom0 has maximum 2 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 108kB init memory. (XEN) mtrr: type mismatch for c0000000,1000000 old: write-back new: write-combining (XEN) mtrr: type mismatch for c0000000,1000000 old: write-back new: write-combining [root@hx80kc1 ~]# [root@hx80kc1 ~]# lspci ... 04:00.0 Ethernet controller: Intel Corporation 82557/8/9/0/1 Ethernet Pro 100 (rev 05) ... 04:02.0 VGA compatible controller: nVidia Corporation NV5M64 [RIVA TNT2 Model 64/Model 64 Pro] (rev 15) ... [root@hx80kc1 ~]# [root@hx80kc1 ~]# lspci -n ... 04:00.0 0200: 8086:1229 (rev 05) 04:02.0 0300: 10de:002d (rev 15) # # tail -n 10 /etc/xen/xend-pci-permissive.sxp # (unconstrained_dev_ids # ('XXXX:XXXX:XXXX:XXXX' # existing entry # 'YYYY:YYYY:YYYY:YYYY' # new entry 1 # 'ZZZZ:ZZZZ') # new entry 2 # ) ############################################################################### (unconstrained_dev_ids #('0123:4567:89AB:CDEF') ('10de:002d') ) [root@hx80kc1 ~]# [root@hx80kc1 ~]# grep pci /etc/xen/winxp pci = [ "04:00.0" ] [root@hx80kc1 ~]# [root@hx80kc1 ~]# xm pci-list-assignable-devices [root@hx80kc1 ~]# [root@hx80kc1 ~]# xm create /etc/xen/winxp Using config file "/etc/xen/winxp". Error: failed to assign device: maybe the platform doesn't support VT-d, or VT-d isn't enabled properly? [root@hx80kc1 ~]# -------------------------------------- Okay, there's as much detail as I can think to include right now. I'm concerned that 'xm dmesg' shows the following message: (XEN) I/O virtualisation disabled Thoung I don't know if that would actually prevent PCI passthrough. So, how do I get the PCI card passed through to my hvm domain? What am I missing? Many thanks in advance for your help!! -Ben _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users

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