linux-kernel - Re: [tip: x86/apic] x86/io_apic: Cleanup trigger/polarity helpers

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Date:   Tue, 10 Nov 2020 10:17:29 -0600
From:   Tom Lendacky <thomas.lendacky@....com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>
Cc:     linux-kernel@...r.kernel.org, David Woodhouse <dwmw@...zon.co.uk>,
        x86 <x86@...nel.org>, Qian Cai <cai@...hat.com>
Subject: Re: [tip: x86/apic] x86/io_apic: Cleanup trigger/polarity helpers

On 11/10/20 9:54 AM, Thomas Gleixner wrote:
> On Tue, Nov 10 2020 at 08:55, Tom Lendacky wrote:
>> On 11/10/20 8:34 AM, Thomas Gleixner wrote:
>> I was about to send the dmesg output when I saw this. A quick test with
>> this change resolves the boot issue, thanks!
> 
> /me feels stupid
> 
>> I'm still seeing the warning at arch/x86/kernel/apic/apic.c:2527, but I'll
>> start a separate thread on that.
> 
> Can you please provide the backtrace?

Yep. The warning started triggering with:
47bea873cf80 ("x86/msi: Only use high bits of MSI address for DMAR unit")

Here's the backtrace:

[   15.611109] ------------[ cut here ]------------
[   15.616274] WARNING: CPU: 184 PID: 1 at arch/x86/kernel/apic/apic.c:2505 __irq_msi_compose_msg+0x79/0x80
[   15.626855] Modules linked in:
[   15.630263] CPU: 184 PID: 1 Comm: swapper/0 Not tainted 5.10.0-rc1-sos-custom #1
[   15.638516] Hardware name: AMD Corporation ETHANOL_X/ETHANOL_X, BIOS REX1006G 01/25/2020
[   15.647549] RIP: 0010:__irq_msi_compose_msg+0x79/0x80
[   15.653188] Code: 0f f0 ff 09 d0 89 06 8b 47 04 c7 46 04 00 00 00 00 88 46 08 45 84 c0 74 08 8b 07 30 c0 89 46 04 c3 81 3f ff 00 00 00 77 01 c3 <0f> 0b c3 0f 1f 40 00 0f 1f 44 00 00 8b 05 81 f9 04 02 85 c0 75 16
[   15.674140] RSP: 0018:ffffc900000c7c30 EFLAGS: 00010212
[   15.679971] RAX: 0000000000000021 RBX: ffff888143789028 RCX: 0000000000000000
[   15.687936] RDX: 0000000000000000 RSI: ffffc900000c7c40 RDI: ffff8881447dd1c0
[   15.695899] RBP: ffff888143789028 R08: 0000000000000000 R09: 0000000000000005
[   15.703861] R10: 0000000000000002 R11: 0000000000000004 R12: ffff88900e7b80c0
[   15.711825] R13: 0000000000000000 R14: ffff88907646ba80 R15: 0000000000000000
[   15.719789] FS:  0000000000000000(0000) GS:ffff88900f000000(0000) knlGS:0000000000000000
[   15.728821] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   15.735234] CR2: 0000000000000000 CR3: 000000114d40a000 CR4: 0000000000350ee0
[   15.743197] Call Trace:
[   15.745929]  irq_chip_compose_msi_msg+0x2e/0x40
[   15.750984]  msi_domain_activate+0x4b/0x90
[   15.755556]  __irq_domain_activate_irq+0x53/0x80
[   15.760707]  ? irq_set_msi_desc_off+0x5a/0x90
[   15.765568]  irq_domain_activate_irq+0x25/0x40
[   15.770525]  __msi_domain_alloc_irqs+0x16a/0x310
[   15.775680]  __pci_enable_msi_range+0x182/0x2b0
[   15.780738]  ? e820__memblock_setup+0x7d/0x7d
[   15.785597]  pci_enable_msi+0x16/0x30
[   15.789685]  iommu_init_msi+0x30/0x190
[   15.793860]  state_next+0x39d/0x665
[   15.797754]  ? e820__memblock_setup+0x7d/0x7d
[   15.802615]  iommu_go_to_state+0x24/0x28
[   15.806993]  amd_iommu_init+0x11/0x46
[   15.811076]  pci_iommu_init+0x16/0x3f
[   15.815165]  do_one_initcall+0x44/0x1d0
[   15.819447]  kernel_init_freeable+0x1e7/0x249
[   15.824311]  ? rest_init+0xb4/0xb4
[   15.828097]  kernel_init+0xa/0x10c
[   15.831889]  ret_from_fork+0x22/0x30
[   15.835883] CPU: 184 PID: 1 Comm: swapper/0 Not tainted 5.10.0-rc1-sos-custom #1
[   15.836876] Hardware name: AMD Corporation ETHANOL_X/ETHANOL_X, BIOS REX1006G 01/25/2020
[   15.836876] Call Trace:
[   15.836876]  dump_stack+0x6d/0x88
[   15.836876]  __warn.cold+0x24/0x3d
[   15.836876]  ? __irq_msi_compose_msg+0x79/0x80
[   15.836876]  report_bug+0xd1/0x100
[   15.836876]  handle_bug+0x35/0x80
[   15.836876]  exc_invalid_op+0x14/0x70
[   15.836876]  asm_exc_invalid_op+0x12/0x20

[   15.836876] RIP: 0010:__irq_msi_compose_msg+0x79/0x80
[   15.836876] Code: 0f f0 ff 09 d0 89 06 8b 47 04 c7 46 04 00 00 00 00 88 46 08 45 84 c0 74 08 8b 07 30 c0 89 46 04 c3 81 3f ff 00 00 00 77 01 c3 <0f> 0b c3 0f 1f 40 00 0f 1f 44 00 00 8b 05 81 f9 04 02 85 c0 75 16
[   15.836876] RSP: 0018:ffffc900000c7c30 EFLAGS: 00010212
[   15.836876] RAX: 0000000000000021 RBX: ffff888143789028 RCX: 0000000000000000
[   15.836876] RDX: 0000000000000000 RSI: ffffc900000c7c40 RDI: ffff8881447dd1c0
[   15.836876] RBP: ffff888143789028 R08: 0000000000000000 R09: 0000000000000005
[   15.836876] R10: 0000000000000002 R11: 0000000000000004 R12: ffff88900e7b80c0
[   15.836876] R13: 0000000000000000 R14: ffff88907646ba80 R15: 0000000000000000
[   15.836876]  irq_chip_compose_msi_msg+0x2e/0x40
[   15.836876]  msi_domain_activate+0x4b/0x90
[   15.836876]  __irq_domain_activate_irq+0x53/0x80
[   15.836876]  ? irq_set_msi_desc_off+0x5a/0x90
[   15.836876]  irq_domain_activate_irq+0x25/0x40
[   15.836876]  __msi_domain_alloc_irqs+0x16a/0x310
[   15.836876]  __pci_enable_msi_range+0x182/0x2b0
[   15.836876]  ? e820__memblock_setup+0x7d/0x7d
[   15.836876]  pci_enable_msi+0x16/0x30
[   15.836876]  iommu_init_msi+0x30/0x190
[   15.836876]  state_next+0x39d/0x665
[   15.836876]  ? e820__memblock_setup+0x7d/0x7d
[   15.836876]  iommu_go_to_state+0x24/0x28
[   15.836876]  amd_iommu_init+0x11/0x46
[   15.836876]  pci_iommu_init+0x16/0x3f
[   15.836876]  do_one_initcall+0x44/0x1d0
[   15.836876]  kernel_init_freeable+0x1e7/0x249
[   15.836876]  ? rest_init+0xb4/0xb4
[   15.836876]  kernel_init+0xa/0x10c
[   15.836876]  ret_from_fork+0x22/0x30
[   16.046524] ---[ end trace 2fb272e5ca8df1c8 ]---

Thanks,
Tom

> 
> Thanks,
> 
>         tglx
>