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xen-devel
RE: [Xen-devel] [PATCH] fix iommu interrupt setup
Allen, this is because the register_lock is not always called with irq
disabled. Seems it is called with spin_lock(), instead of spin_lock_irqsave()
in queue_invalidate_wait().
But I'm a bit curios why intel_vtd_setup() will be called after
queue_invalidate_wait().
Thanks
Yunhong Jiang
xen-devel-bounces@xxxxxxxxxxxxxxxxxxx <> wrote:
> I'm getting the same bug.
> -Alex
>
> (XEN) ----[ Xen-3.4-unstable x86_64 debug=y Not tainted ]---- (XEN) CPU:
> 0 (XEN) RIP: e008:[<ffff828c8011b62f>] check_lock+0x19/0x4e
> (XEN) RFLAGS: 0000000000010046 CONTEXT: hypervisor
> (XEN) rax: 0000000000000001 rbx: 0000000000000040 rcx: 0000000000000001
> (XEN) rdx: 0000000000000082 rsi: 0000000000000001 rdi: 0000000000000044
> (XEN) rbp: ffff828c80277c58 rsp: ffff828c80277c58 r8: 0000000000000005
> (XEN) r9: 0000000000000001 r10: 0000000000000001 r11: ffff828c8028e360
> (XEN) r12: 0000000000000082 r13: 0000000000000282 r14: 0000000000000090
> (XEN) r15: ffff83013bfba430 cr0: 000000008005003b cr4: 00000000000026f0
> (XEN) cr3: 00000000bd47c000 cr2: 0000000000000044
> (XEN) ds: 0000 es: 0000 fs: 0000 gs: 0000 ss: 0000 cs: e008
> (XEN) Xen stack trace from rsp=ffff828c80277c58:
> (XEN) ffff828c80277c78 ffff828c8011b7aa 0000000000000000 0000000000000040
> (XEN) ffff828c80277c98 ffff828c8012e223 ffff828c802a1c00 ffff828c802a1c24
> (XEN) ffff828c80277ca8 ffff828c8012e282 ffff828c80277ce8 ffff828c80147e90
> (XEN) ffff828c80277ce8 00000000fffffff4 0000000000000090 ffff828c8012e938
> (XEN) ffff828c801e31cd ffff83013bff1f90 ffff828c80277d28 ffff828c801483be
> (XEN) ffff83013bfba430 0000000000000090 ffff83013bff1f90 0000000000004800
> (XEN) ffff83013bff1f90 ffff828c8029d400 ffff828c80277d68 ffff828c8012e5ef
> (XEN) ffff828c80277d48 0000000000000003 ffff83013bff1f90 0000000000000282
> (XEN) ffff83013bff16f0 0000000000100000 ffff828c80277d98 ffff828c8012e7a1
> (XEN) 0000000000000003 ffff83013bfba330 ffff828c8020c930 0000000000000020
> (XEN) ffff828c80277de8 ffff828c8012fe48 ffff828c80277dd8 ffff828c8012a2e9
> (XEN) 0000000000000002 000100018020a4c0 0001000100010001 00000000ffffffed
> (XEN) ffff828c8022fc08 0000000000000003 ffff828c80277e08 ffff828c8012c008
> (XEN) ffff828c80277e08 ffff828c8022faf8 ffff828c80277f18 ffff828c80223d09
> (XEN) 0000000000000000 0000000000000000 0000000000000000 ffff828c8020f665
> (XEN) ffffffffc0270000 ffff8300bd47cff8 ffff8300bd47dff8 000000000008bf50
> (XEN) 0000000000000000 0000000000000000 0000000000000000 ffff83000008bfc0
> (XEN) ffff83000008bf50 0000000000cc3c00 0000000000000000 0000000000000000
> (XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> (XEN) 0000000000000000 0000000000000000 0000000800000000 000000010000006e
> (XEN) Xen call trace:
> (XEN) [<ffff828c8011b62f>] check_lock+0x19/0x4e
> (XEN) [<ffff828c8011b7aa>] _spin_lock_irqsave+0x21/0x3f
> (XEN) [<ffff828c8012e223>] dma_msi_unmask+0x2a/0x4b
> (XEN) [<ffff828c8012e282>] dma_msi_startup+0x9/0x10
> (XEN) [<ffff828c80147e90>] setup_irq_vector+0x73/0x99
> (XEN) [<ffff828c801483be>] request_irq_vector+0x6c/0x9a
> (XEN) [<ffff828c8012e5ef>] iommu_set_interrupt+0x97/0x10f
> (XEN) [<ffff828c8012e7a1>] init_vtd_hw+0x13a/0x2d1
> (XEN) [<ffff828c8012fe48>] intel_vtd_setup+0x330/0x4bb
> (XEN) [<ffff828c8012c008>] iommu_setup+0x2d/0xf5
> (XEN) [<ffff828c80223d09>] __start_xen+0x463f/0x4956 (XEN)
> (XEN) Pagetable walk from 0000000000000044:
> (XEN) L4[0x000] = 000000013bff0063 5555555555555555
> (XEN) L3[0x000] = 000000013bfef063 5555555555555555
> (XEN) L2[0x000] = 000000013bfee063 5555555555555555
> (XEN) L1[0x000] = 0000000000000000 ffffffffffffffff (XEN)
> (XEN) ****************************************
> (XEN) Panic on CPU 0:
> (XEN) FATAL PAGE FAULT
> (XEN) [error_code=0000]
> (XEN) Faulting linear address: 0000000000000044
> (XEN) ****************************************
> (XEN)
> (XEN) Reboot in five seconds...
> (XEN) Resetting with ACPI MEMORY or I/O RESET_REG.
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
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