[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [BUG] pci-passthrough on dom0 kernel versions above 3.8 crashes dom0
On 04/10/13 11:05, Jan Beulich wrote: >>>> On 04.10.13 at 09:44, Kristoffer Egefelt <kristoffer@xxxxxxx> wrote: >> Hi, >> >> I'm trying to pass through a NIC (intel X520 with ixgbevf driver) to domU, >> but since kernel 3.8 this has not worked. >> >> The dom0 kernel seems to cause the problem. >> Xen version, domU kernel version and driver version seems to be unrelated to >> this bug, meaning >> it works as long as dom0 kernel is 3.8. >> I tried kernel version 3.9, 3.10 and 3.11 - all show the same bug pattern >> when used as dom0. >> >> The BUG appears on xl pci attach. >> On pci detach the dom0 panics. >> >> I have attached logs from a working setup (kernel 3.8) and from a setup not >> working (kernel 3.11) and also the kernel config for 3.11. >> >> In short, this is what domU logs after pci attach: >> >> BUG: unable to handle kernel paging request at ffffc9000030200c >> IP: [<ffffffff81205812>] __msix_mask_irq+0x21/0x24 >> PGD 75a40067 PUD 75a41067 PMD 75b44067 PTE 8010000000000464 >> Oops: 0003 [#1] SMP >> Modules linked in: ixgbevf(+) xen_pcifront nfnetlink_log nfnetlink ipt_ULOG >> x_tables x86_pkg_temp_thermal thermal_sys coretemp crc32c_intel >> ghash_clmulni_intel aesni_intel aes_x86_64 ablk_helper cryptd lrw gf128mul >> glue_helper microcode ext4 crc16 jbd2 mbcache xen_blkfront >> CPU: 0 PID: 2122 Comm: modprobe Not tainted 3.11.3-kernel-v1.0.0.21+ #1 > > Are you certain this is kernel (rather than hypervisor) version > dependent? Iirc this is a manifestation of a guest kernel not being > permitted to write to the MSI-X mask bit. > >> And this is dom0 on pci detach: >> >> (XEN) Assertion '_raw_spin_is_locked(lock)' failed at >> /usr/src/xen/xen/include/asm/spinlock.h:16402 >> (XEN) ----[ Xen-4.4-unstable x86_64 debug=y Not tainted ]---- >> (XEN) CPU: 1 >> (XEN) RIP: e008:[<ffff82d0801258ef>] _spin_unlock_irqrestore+0x27/0x32 >> (XEN) RFLAGS: 0000000000010202 CONTEXT: hypervisor >> (XEN) rax: 0000000000000001 rbx: ffff83201ba07724 rcx: 0000000000000001 >> (XEN) rdx: ffff83201bb97020 rsi: 0000000000000286 rdi: ffff83201ba07724 >> (XEN) rbp: ffff83203ffcfdd8 rsp: ffff83203ffcfdd8 r8: ffff8141002000e0 >> (XEN) r9: 000000000000001c r10: 0000000000000082 r11: 0000000000000001 >> (XEN) r12: 0000000000000000 r13: ffff8320e13c8240 r14: ffff880148047df4 >> (XEN) r15: 0000000000000286 cr0: 0000000080050033 cr4: 00000000000426f0 >> (XEN) cr3: 000000206f3ff000 cr2: 00007fa5ec560c49 >> (XEN) ds: 0000 es: 0000 fs: 0000 gs: 0000 ss: e010 cs: e008 >> (XEN) Xen stack trace from rsp=ffff83203ffcfdd8: >> (XEN) ffff83203ffcfe68 ffff82d080166a4f ffff83203ffcfe18 0000000280118988 >> (XEN) 0000000000000cfe 0000000000000cfe ffff832015d3b8a0 ffff8320e13c83f0 >> (XEN) ffff832015d3b880 0000000000000001 00000000fee00678 0000000000000000 >> (XEN) ffff83200000f800 000000000000001b ffff8300bcef5000 ffffffffffffffed >> (XEN) ffff880148047df4 ffffffff814530e0 ffff83203ffcfef8 ffff82d08017dee4 >> (XEN) ffff832000000002 0000000000000008 ffff83203ffcfef8 ffff82d000a0fb00 >> (XEN) 0000000000000000 ffffffff93010000 ffff82d0802e8000 ffff83203ffc80ef >> (XEN) 82d080222c00b948 c390ef66d1ffffff ffff83203ffcfef8 ffff8300bcef5000 >> (XEN) ffff880145951868 ffff880145bb2a60 ffff880148047f50 ffffffff814530e0 >> (XEN) 00007cdfc00300c7 ffff82d08022213b ffffffff8100142a 0000000000000021 >> (XEN) ffffffff814530e0 ffff880148047f50 000000000000c002 0000000000009300 >> (XEN) ffff88013faf1a80 ffff880145951000 0000000000000202 0000000000000093 >> (XEN) ffff880148047df4 0000000000000002 0000000000000021 ffffffff8100142a >> (XEN) 0000000000000000 ffff880148047df4 000000000000001b 0001010000000000 >> (XEN) ffffffff8100142a 000000000000e033 0000000000000202 ffff880148047dc8 >> (XEN) 000000000000e02b 0000000000000000 0000000000000000 0000000000000000 >> (XEN) 0000000000000000 0000000000000001 ffff8300bcef5000 0000004f9b885e00 >> (XEN) 0000000000000000 >> (XEN) Xen call trace: >> (XEN) [<ffff82d0801258ef>] _spin_unlock_irqrestore+0x27/0x32 >> (XEN) [<ffff82d080166a4f>] pci_restore_msi_state+0x1c9/0x2f0 >> (XEN) [<ffff82d08017dee4>] do_physdev_op+0xe4f/0x114f >> (XEN) [<ffff82d08022213b>] syscall_enter+0xeb/0x145 >> (XEN) >> (XEN) >> (XEN) **************************************** >> (XEN) Panic on CPU 1: >> (XEN) Assertion '_raw_spin_is_locked(lock)' failed at >> /usr/src/xen/xen/include/asm/spinlock.h:16402 >> (XEN) **************************************** >> (XEN) >> (XEN) Manual reset required ('noreboot' specified) > > This, otoh, is clearly a hypervisor bug. Afaict the patch below > should help. > > But - this code is supposed to be executed on host S3 resume only > (i.e. there might also be some kernel flaw involved here). It's called from pci_restore_state() which is called from pciback when a device is released. This doesn't seem unreasonable to me. David _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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