http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1744
Summary: Xen panic on guest shutdown with PCI Passthrough
Product: Xen
Version: unstable
Platform: Other
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Hypervisor
AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
ReportedBy: stefano.stabellini@xxxxxxxxxx
Each time a guest with a passthrough pci device is shutdown, Xen panic
on a NMI - MEMORY ERROR.
guest os: debian lenny with default kernel
dom0: linux 2.6.32
Xen serial log:
(XEN) NMI - MEMORY ERROR
(XEN) ----[ Xen-4.1.0-rc3-pre x86_64 debug=y Not tainted ]----
(XEN) CPU: 0
(XEN) RIP: e008:[<ffff82c48015f032>] msi_set_mask_bit+0xea/0x121
(XEN) RFLAGS: 0000000000000082 CONTEXT: hypervisor
(XEN) rax: 00000000ffffffff rbx: ffff83023f324190 rcx: 0000000000000001
(XEN) rdx: 0000000000000082 rsi: 0000000000000001 rdi: ffff830232481838
(XEN) rbp: ffff82c480297d38 rsp: ffff82c480297d08 r8: 0000000000000002
(XEN) r9: 0000000000000004 r10: 0000000000000004 r11: 0000000000000001
(XEN) r12: ffff83010c1e9c70 r13: ffff83023f324000 r14: ffff83010c1e9c20
(XEN) r15: 0000000000000001 cr0: 000000008005003b cr4: 00000000000026f0
(XEN) cr3: 000000022c9aa000 cr2: 00000000cb74379c
(XEN) ds: 007b es: 007b fs: 00d8 gs: 00e0 ss: 0000 cs: e008
(XEN) Xen stack trace from rsp=ffff82c480297d08:
(XEN) ffff82c480297d48 ffff83023f324190 ffff83010c1e9c70 ffff83023f324000
(XEN) ffff830232481800 0000000000000036 ffff82c480297d48 ffff82c48015f087
(XEN) ffff82c480297da8 ffff82c480162fb1 000000000000002f ffff830232481834
(XEN) 0000000000000000 0000000000000000 0000000000000000 ffff83023f324190
(XEN) 0000000000000036 ffff83023f324000 ffff830232481800 ffffffffffffffff
(XEN) ffff82c480297e08 ffff82c48016315c 0000000000000282 0000000000000036
(XEN) 00000000000000d8 ffff8302324808b4 010000000000002f 0000000000000036
(XEN) ffff83023f324000 ffff83023f324190 ffff82c480297f18 ffffffffffffffff
(XEN) ffff82c480297e38 ffff82c480163321 ffff83023f324000 ffff8300bf4f0000
(XEN) ffff83023f324000 ffff83023f324000 ffff82c480297e58 ffff82c48015642a
(XEN) ffff8300bf4f0000 00000000ffffffff ffff82c480297e88 ffff82c480104c59
(XEN) 0000000000000000 0000000000000000 ffff82c4802d4020 0000000000000000
(XEN) ffff82c480297eb8 ffff82c48012adfd ffff82c480123327 0000000000000000
(XEN) 0000000000000000 ffff82c4802b0880 ffff82c480297ef8 ffff82c480123327
(XEN) ffff82c4802d3ec0 ffff8300bf2f2000 0000000000000000 ffff8300bf4d6000
(XEN) 0000029b7b0912f0 ffff82c4802d3ec0 ffff82c480297f08 ffff82c4801233a2
(XEN) ffff82c480297d20 ffff82c480211516 0000000000000000 0000000000000000
(XEN) 0000000000000000 0000000000000000 0000000000000000 00000000deadbeef
(XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN) 0000000000000000 00000000deadbeef 0000000000000001 0000000000000002
(XEN) Xen call trace:
(XEN) [<ffff82c48015f032>] msi_set_mask_bit+0xea/0x121
(XEN) [<ffff82c48015f087>] mask_msi_irq+0xe/0x10
(XEN) [<ffff82c480162fb1>] __pirq_guest_unbind+0x298/0x2aa
(XEN) [<ffff82c48016315c>] unmap_domain_pirq+0x199/0x307
(XEN) [<ffff82c480163321>] free_domain_pirqs+0x57/0x83
(XEN) [<ffff82c48015642a>] arch_domain_destroy+0x30/0x2e3
(XEN) [<ffff82c480104c59>] complete_domain_destroy+0x6e/0x12a
(XEN) [<ffff82c48012adfd>] rcu_process_callbacks+0x173/0x1e1
(XEN) [<ffff82c480123327>] __do_softirq+0x88/0x99
(XEN) [<ffff82c4801233a2>] do_softirq+0x6a/0x7a
(XEN)
(XEN)
(XEN) ****************************************
(XEN) Panic on CPU 0:
(XEN) FATAL TRAP: vector = 2 (nmi)
(XEN) [error_code=0000] , IN INTERRUPT CONTEXT
(XEN) ****************************************
qemu log:
Using file /dev/xen/blktap-2/tapdev0 in read-write mode
Watching /local/domain/0/device-model/1/logdirty/cmd
Watching /local/domain/0/device-model/1/command
Watching /local/domain/1/cpu
char device redirected to /dev/pts/4
qemu_map_cache_init nr_buckets = 4000 size 327680
shared page at pfn feffd
buffered io page at pfn feffb
Guest uuid = 3e68da1b-bec3-44a0-84cf-d3f7e341f5a6
populating video RAM at ff000000
mapping video RAM from ff000000
Register xen platform.
Done register platform.
platform_fixed_ioport: changed ro/rw state of ROM memory area. now is rw state.
xs_read(/local/domain/0/device-model/1/xen_extended_power_mgmt): read error
xs_read(): vncpasswd get error.
/vm/3e68da1b-bec3-44a0-84cf-d3f7e341f5a6/vncpasswd.
Log-dirty: no command yet.
I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0
dm-command: hot insert pass-through pci dev
register_real_device: Assigning real physical device 02:00.0 ...
pt_iomul_init: Error: pt_iomul_init can't open file /dev/xen/pci_iomul: No such
file or directory: 0x2:0x0.0x0
pt_register_regions: IO region registered (size=0x02000000
base_addr=0xda000004)
pt_msix_init: get MSI-X table bar base da000000
pt_msix_init: table_off = c000, total_entries = 9
pt_msix_init: errno = 2
pt_msix_init: mapping physical MSI-X table to b7880000
pci_intx: intx=1
register_real_device: Real physical device 02:00.0 registered successfuly!
IRQ type = INTx
I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0
vcpu-set: watch node error.
I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0
xs_read(/local/domain/1/log-throttling): read error
qemu: ignoring not-understood drive `/local/domain/1/log-throttling'
medium change watch on `/local/domain/1/log-throttling' - unknown device,
ignored
I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0
cirrus vga map change while on lfb mode
pt_iomem_map: e_phys=f2000000 maddr=da000000 type=0 len=33554432 index=0
first_map=1
mapping vram to f0000000 - f0400000
platform_fixed_ioport: changed ro/rw state of ROM memory area. now is rw state.
platform_fixed_ioport: changed ro/rw state of ROM memory area. now is ro state.
pt_pci_write_config: Warning: Guest attempt to set address to unused Base
Address Register. [00:04.0][Offset:30h][Length:4]
pt_msix_update_one: Update msix entry 0 with pirq 37 gvec b1
pt_msix_update_one: Update msix entry 1 with pirq 36 gvec b9
shutdown requested in cpu_handle_ioreq
Issued domain 1 poweroff
dm-command: hot remove pass-through pci dev
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