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Message-ID: <CAE9FiQU=Q8paxTJpqN8GFGYeq6u-E=VBtyQSVzVNYnJGEybtqw@mail.gmail.com> Date: Wed, 10 Dec 2014 23:35:50 -0800 From: Yinghai Lu <yinghai@...nel.org> To: Jiang Liu <jiang.liu@...ux.intel.com>, Joerg Roedel <joro@...tes.org>, Borislav Petkov <bp@...en8.de>, Ingo Molnar <mingo@...nel.org>, Thomas Gleixner <tglx@...utronix.de>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, "H. Peter Anvin" <hpa@...or.com>, Linus Torvalds <torvalds@...ux-foundation.org> Subject: Re: [tip:x86/apic] iommu/vt-d: Move iommu preparatory allocations to irq_remap_ops.prepare On Fri, Dec 5, 2014 at 3:26 PM, tip-bot for Thomas Gleixner <tipbot@...or.com> wrote: > Commit-ID: e9220e591375af6d02604c261999df570fba744f > Gitweb: http://git.kernel.org/tip/e9220e591375af6d02604c261999df570fba744f > Author: Thomas Gleixner <tglx@...utronix.de> > AuthorDate: Fri, 5 Dec 2014 08:48:32 +0000 > Committer: Thomas Gleixner <tglx@...utronix.de> > CommitDate: Sat, 6 Dec 2014 00:19:25 +0100 > > iommu/vt-d: Move iommu preparatory allocations to irq_remap_ops.prepare > > The whole iommu setup for irq remapping is a convoluted mess. The > iommu detect function gets called from mem_init() and the prepare > callback gets called from enable_IR_x2apic() for unknown reasons. Got [ 134.510969] calling ahci_pci_driver_init+0x0/0x1b @ 1 [ 134.511387] ahci 0000:00:1f.2: version 3.0 [ 134.530941] alloc irq_desc for 91 on node 0 [ 134.531168] alloc irq_desc for 92 on node 0 [ 134.550728] alloc irq_desc for 93 on node 0 [ 134.550995] alloc irq_desc for 94 on node 0 [ 134.551199] alloc irq_desc for 95 on node 0 [ 134.570871] alloc irq_desc for 96 on node 0 [ 134.571090] alloc irq_desc for 97 on node 0 [ 134.571303] alloc irq_desc for 98 on node 0 [ 134.590974] alloc irq_desc for 99 on node 0 [ 134.591205] alloc irq_desc for 100 on node 0 [ 134.610882] alloc irq_desc for 101 on node 0 [ 134.611136] alloc irq_desc for 102 on node 0 [ 134.611364] alloc irq_desc for 103 on node 0 [ 134.630992] alloc irq_desc for 104 on node 0 [ 134.631232] alloc irq_desc for 105 on node 0 [ 134.650885] alloc irq_desc for 106 on node 0 [ 134.651246] ahci 0000:00:1f.2: SSS flag set, parallel bus scan disabled [ 134.670926] ahci 0000:00:1f.2: AHCI 0001.0200 32 slots 6 ports 3 Gbps 0x3f impl SATA mode [ 134.671349] ahci 0000:00:1f.2: flags: 64bit ncq sntf stag pm led clo pio slum part ccc ems sxs [ 134.691158] ahci 0000:00:1f.2: with iommu 3 : domain 10 [ 134.751560] BUG: unable to handle kernel NULL pointer dereference at 0000000000000118 [ 134.751997] IP: [<ffffffff81eafe50>] modify_irte+0x40/0xd0 [ 134.770893] PGD 0 [ 134.771011] Oops: 0000 [#1] SMP [ 134.771195] Modules linked in: [ 134.771344] CPU: 0 PID: 2169 Comm: kworker/0:1 Tainted: G W [ 134.811557] Workqueue: events work_for_cpu_fn [ 134.830823] task: ffff881024725240 ti: ffff8810252f8000 task.ti: ffff8810252f8000 [ 134.831176] RIP: 0010:[<ffffffff81eafe50>] [<ffffffff81eafe50>] modify_irte+0x40/0xd0 [ 134.851029] RSP: 0000:ffff8810252fba18 EFLAGS: 00010096 [ 134.851276] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000be00bd [ 134.871322] RDX: 0000000000000000 RSI: ffffffff81eafe3f RDI: 0000000000000046 [ 134.891061] RBP: ffff8810252fba48 R08: 0000000000000001 R09: 0000000000000001 [ 134.891393] R10: ffff881024725240 R11: 0000000000000292 R12: 0000000000000000 [ 134.911249] R13: 0000000000000096 R14: ffff881022b181d0 R15: ffff880079268260 [ 134.930824] FS: 0000000000000000(0000) GS:ffff88103de00000(0000) knlGS:0000000000000000 [ 134.931202] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 134.950966] CR2: 0000000000000118 CR3: 0000000002c1a000 CR4: 00000000000007f0 [ 134.970775] Stack: [ 134.970883] ffff8810252fba88 0000000000000046 ffff881022f6c660 ffff881026d00000 [ 134.971253] 000000000000005c ffff880079268200 ffff8810252fba58 ffffffff81eaff26 [ 134.991066] ffff8810252fba78 ffffffff81106761 ffff880079268200 ffff88103d889400 [ 135.010908] Call Trace: [ 135.011038] [<ffffffff81eaff26>] intel_irq_remapping_activate+0x16/0x20 [ 135.030800] [<ffffffff81106761>] irq_domain_activate_irq+0x41/0x50 [ 135.031103] [<ffffffff8110674b>] irq_domain_activate_irq+0x2b/0x50 [ 135.050857] [<ffffffff81103f19>] irq_startup+0x29/0x70 [ 135.051091] [<ffffffff81102857>] __setup_irq+0x327/0x590 [ 135.070849] [<ffffffff81a3d820>] ? ahci_bad_pmp_check_ready+0x70/0x70 [ 135.071143] [<ffffffff81102c42>] request_threaded_irq+0xf2/0x150 [ 135.090972] [<ffffffff81a3d820>] ? ahci_bad_pmp_check_ready+0x70/0x70 [ 135.091295] [<ffffffff81a3ff90>] ? ahci_host_activate+0x180/0x180 [ 135.111014] [<ffffffff8110495f>] devm_request_threaded_irq+0x5f/0xb0 [ 135.130804] [<ffffffff81a3feb3>] ahci_host_activate+0xa3/0x180 [ 135.131097] [<ffffffff81a3d391>] ahci_init_one+0x9d1/0xac0 [ 135.150841] [<ffffffff8157d735>] local_pci_probe+0x45/0xa0 [ 135.151127] [<ffffffff810b8868>] work_for_cpu_fn+0x18/0x30 [ 135.170843] [<ffffffff810bbd24>] process_one_work+0x254/0x470 [ 135.171103] [<ffffffff810bbc89>] ? process_one_work+0x1b9/0x470 [ 135.190846] [<ffffffff810bce1b>] worker_thread+0x31b/0x4e0 [ 135.191115] [<ffffffff810ea3bd>] ? trace_hardirqs_on+0xd/0x10 [ 135.210920] [<ffffffff810bcb00>] ? pool_mayday_timeout+0x170/0x170 [ 135.211215] [<ffffffff810c1ff1>] kthread+0x101/0x110 [ 135.230902] [<ffffffff810ea3bd>] ? trace_hardirqs_on+0xd/0x10 [ 135.231157] [<ffffffff810c1ef0>] ? kthread_stop+0x100/0x100 [ 135.250930] [<ffffffff82015e6c>] ret_from_fork+0x7c/0xb0 [ 135.251178] [<ffffffff810c1ef0>] ? kthread_stop+0x100/0x100 [ 135.270969] Code: ec 10 48 85 ff 0f 84 90 00 00 00 48 c7 c7 80 34 e0 82 49 89 f6 e8 21 54 16 00 0f b7 53 08 49 89 c5 0f b7 43 0a 4c 8b 23 8d 1c 02 <49> 8b 84 24 18 01 00 00 48 63 fb 48 c1 e7 04 48 03 38 49 8b 06 [ 135.291699] RIP [<ffffffff81eafe50>] modify_irte+0x40/0xd0 [ 135.311051] RSP <ffff8810252fba18> [ 135.311215] CR2: 0000000000000118 [ 135.330856] ---[ end trace fee039719f1667df ]--- [ 135.333024] BUG: unable to handle kernel paging request at ffffffffffffff98 [ 135.350911] IP: [<ffffffff810c2530>] kthread_data+0x10/0x20 [ 135.351230] PGD 2c1b067 PUD 2c1d067 PMD 0 [ 135.351443] Oops: 0000 [#2] SMP [ 135.370998] Modules linked in: [ 135.371168] CPU: 0 PID: 2169 Comm: kworker/0:1 Tainted: G D W [ 135.412423] task: ffff881024725240 ti: ffff8810252f8000 task.ti: ffff8810252f8000 [ 135.412798] RIP: 0010:[<ffffffff810c2530>] [<ffffffff810c2530>] kthread_data+0x10/0x20 [ 135.431159] RSP: 0000:ffff8810252fb538 EFLAGS: 00010096 [ 135.450891] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000000000f [ 135.451218] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff881024725240 [ 135.471044] RBP: ffff8810252fb538 R08: ffff8810247252d0 R09: 0000000000000001 [ 135.490873] R10: ffff881024725240 R11: 000000000000001a R12: ffff88103dfd2c40 [ 135.491237] R13: 0000000000000000 R14: 0000000000000000 R15: ffff881024725240 [ 135.511046] FS: 0000000000000000(0000) GS:ffff88103de00000(0000) knlGS:0000000000000000 [ 135.530882] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 135.531160] CR2: 0000000000000028 CR3: 0000000002c1a000 CR4: 00000000000007f0 [ 135.550979] Stack: [ 135.551074] ffff8810252fb558 ffffffff810bd065 ffff8810252fb558 ffff881024725240 [ 135.570927] ffff8810252fb678 ffffffff8200fc0b ffff881025ffec00 0000000000009000 [ 135.571302] ffff881024725240 ffff8810252fbfd8 ffff88103dfd3a40 ffff881024725240 [ 135.591114] Call Trace: [ 135.591231] [<ffffffff810bd065>] wq_worker_sleeping+0x15/0xb0 [ 135.610996] [<ffffffff8200fc0b>] __schedule+0x18b/0xa70 [ 135.611237] [<ffffffff810ea3bd>] ? trace_hardirqs_on+0xd/0x10 [ 135.630988] [<ffffffff810a634a>] ? do_exit+0x88a/0x9f0 [ 135.631222] [<ffffffff810a634a>] ? do_exit+0x88a/0x9f0 [ 135.650932] [<ffffffff82010555>] schedule+0x65/0x70 [ 135.651186] [<ffffffff810a6415>] do_exit+0x955/0x9f0 [ 135.670899] [<ffffffff81054a08>] oops_end+0xb8/0xd0 [ 135.671136] [<ffffffff81ffa88a>] no_context+0x309/0x352 [ 135.671373] [<ffffffff81ffaa98>] __bad_area_nosemaphore+0x1c5/0x1e4 [ 135.691185] [<ffffffff81ffaaca>] bad_area_nosemaphore+0x13/0x15 [ 135.710934] [<ffffffff81093f26>] __do_page_fault+0x266/0x590 [ 135.711292] [<ffffffff810c8d20>] ? task_rq_lock+0x50/0xb0 [ 135.730941] [<ffffffff810c8d20>] ? task_rq_lock+0x50/0xb0 [ 135.731200] [<ffffffff820150f2>] ? _raw_spin_lock+0x62/0x70 [ 135.750949] [<ffffffff810c8d20>] ? task_rq_lock+0x50/0xb0 [ 135.751195] [<ffffffff810ea166>] ? trace_hardirqs_on_caller+0x16/0x260 [ 135.770989] [<ffffffff810e7c6f>] ? trace_hardirqs_off_caller+0x1f/0x160 [ 135.771309] [<ffffffff81094296>] do_page_fault+0x46/0x80 [ 135.791081] [<ffffffff82017c72>] page_fault+0x22/0x30 [ 135.791310] [<ffffffff81eafe3f>] ? modify_irte+0x2f/0xd0 [ 135.811037] [<ffffffff81eafe50>] ? modify_irte+0x40/0xd0 [ 135.811315] [<ffffffff81eafe3f>] ? modify_irte+0x2f/0xd0 [ 135.831150] [<ffffffff81eaff26>] intel_irq_remapping_activate+0x16/0x20 [ 135.831461] [<ffffffff81106761>] irq_domain_activate_irq+0x41/0x50 [ 135.851716] [<ffffffff8110674b>] irq_domain_activate_irq+0x2b/0x50 [ 135.852020] [<ffffffff81103f19>] irq_startup+0x29/0x70 [ 135.871401] [<ffffffff81102857>] __setup_irq+0x327/0x590 [ 135.871653] [<ffffffff81a3d820>] ? ahci_bad_pmp_check_ready+0x70/0x70 [ 135.891334] [<ffffffff81102c42>] request_threaded_irq+0xf2/0x150 [ 135.911099] [<ffffffff81a3d820>] ? ahci_bad_pmp_check_ready+0x70/0x70 [ 135.911416] [<ffffffff81a3ff90>] ? ahci_host_activate+0x180/0x180 [ 135.931274] [<ffffffff8110495f>] devm_request_threaded_irq+0x5f/0xb0 [ 135.931568] [<ffffffff81a3feb3>] ahci_host_activate+0xa3/0x180 [ 135.951093] [<ffffffff81a3d391>] ahci_init_one+0x9d1/0xac0 [ 135.951375] [<ffffffff8157d735>] local_pci_probe+0x45/0xa0 [ 135.971111] [<ffffffff810b8868>] work_for_cpu_fn+0x18/0x30 [ 135.971366] [<ffffffff810bbd24>] process_one_work+0x254/0x470 [ 135.991196] [<ffffffff810bbc89>] ? process_one_work+0x1b9/0x470 [ 135.991477] [<ffffffff810bce1b>] worker_thread+0x31b/0x4e0 [ 136.011132] [<ffffffff810ea3bd>] ? trace_hardirqs_on+0xd/0x10 [ 136.011393] [<ffffffff810bcb00>] ? pool_mayday_timeout+0x170/0x170 [ 136.031187] [<ffffffff810c1ff1>] kthread+0x101/0x110 [ 136.031420] [<ffffffff810ea3bd>] ? trace_hardirqs_on+0xd/0x10 [ 136.051244] [<ffffffff810c1ef0>] ? kthread_stop+0x100/0x100 [ 136.051494] [<ffffffff82015e6c>] ret_from_fork+0x7c/0xb0 [ 136.071210] [<ffffffff810c1ef0>] ? kthread_stop+0x100/0x100 [ 136.071495] Code: 00 48 89 e5 5d 48 8b 40 88 48 c1 e8 02 83 e0 01 c3 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 48 8b 87 b8 08 00 00 55 48 89 e5 <48> 8b 40 98 5d c3 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 [ 136.111619] RIP [<ffffffff810c2530>] kthread_data+0x10/0x20 [ 136.131069] RSP <ffff8810252fb538> [ 136.131253] CR2: ffffffffffffff98 [ 136.131406] ---[ end trace fee039719f1667e0 ]--- [ 136.151131] Fixing recursive fault but reboot is needed! It is in tip/apic Thanks Yinghai -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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