Re: [PATCH 4/8] acpi_build: Use IOMMU pci device to build IOMMU device ID

[Sairaj Kodilkar <sarunkod@amd.com>]

On 8/31/2026 4:10 PM, Sairaj Kodilkar wrote:
> [  238.666837] pci 0000:02:00.0: EDR: Failed to install notify handler
> [  238.675198] BUG: unable to handle page fault for address: 0000000000080060
> [  238.677682] #PF: supervisor read access in kernel mode
> [  238.679330] #PF: error_code(0x0000) - not-present page
> [  238.680976] PGD 0 P4D 0
> [  238.681846] Oops: Oops: 0000 [#1] SMP NOPTI
> [  238.683206] CPU: 0 UID: 0 PID: 1436 Comm: tee Tainted: G        W           7.1.0-rc1-qemu #2 PREEMPT(lazy)
> [  238.686328] Tainted: [W]=WARN
> [  238.687326] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014
> [  238.690864] RIP: 0010:amd_iommu_probe_device+0x53/0x470
> [  238.692598] Code: b0 0f 84 6d 01 00 00 31 f6 e8 e9 d2 ff ff 85 c0 0f 88 45 01 00 00 4c 89 e7 0f b7 d8 e8 96 d6 ff ff 48 85 c0 0f 84 31 01 00 00 <48> 8b 40 60 0f b7 40 1a 39 c3 0f 8f 21 01 00 00 4c 89 e7 e8 6
> [  238.697728] RSP: 0018:ffffd317452ab948 EFLAGS: 00010206
> [  238.698706] RAX: 0000000000080000 RBX: 0000000000000200 RCX: 0000000000000000
> [  238.700044] RDX: ffff8e374195f000 RSI: 0000000000000200 RDI: ffff8e376ff580d0
> [  238.701369] RBP: ffffd317452ab970 R08: 0000000000080000 R09: ffff8e375156e380
> [  238.702693] R10: ffff8e37707264b8 R11: ffffffffb0f28a20 R12: ffff8e376ff580d0
> [  238.704033] R13: ffff8e376ff580d0 R14: 00000000ffffffff R15: ffff8e3740d0f5d8
> [  238.705358] FS:  00007f2d02060540(0000) GS:ffff8e37ff749000(0000) knlGS:0000000000000000
> [  238.706843] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [  238.707918] CR2: 0000000000080060 CR3: 0000000101d00004 CR4: 0000000000770ef0
> [  238.709285] PKRU: 55555554
> [  238.709828] Call Trace:
> [  238.710314]  <TASK>
> [  238.710742]  iommu_init_device+0xbf/0x330
> [  238.711518]  ? srso_alias_return_thunk+0x5/0xfbef5
> [  238.712450]  iommu_probe_device+0x70/0xb0
> [  238.713214]  iommu_bus_notifier+0x2c/0x80
> [  238.713984]  ? srso_alias_return_thunk+0x5/0xfbef5
> [  238.714889]  notifier_call_chain+0x66/0xf0
> [  238.715673]  blocking_notifier_call_chain+0x47/0x70
> [  238.716632]  bus_notify+0x3b/0x50
> [  238.717295]  device_add+0x631/0x870
> [  238.717982]  pci_device_add+0x303/0x720
> [  238.718735]  pci_scan_single_device+0xad/0xd0
> [  238.719571]  pci_scan_slot+0x97/0x230
> [  238.720279]  ? srso_alias_return_thunk+0x5/0xfbef5
> [  238.721186]  pci_scan_child_bus_extend+0x3b/0x2f0
> [  238.722082]  ? srso_alias_return_thunk+0x5/0xfbef5
> [  238.722987]  pci_scan_bridge_extend+0x447/0x4f0
> [  238.723847]  pci_scan_child_bus_extend+0x106/0x2f0
> [  238.724795]  pci_rescan_bus+0x1b/0x40
> [  238.725499]  dev_rescan_store+0x70/0x90
> [  238.726252]  dev_attr_store+0x1b/0x30
> [  238.726963]  sysfs_kf_write+0x76/0x90
> [  238.727677]  kernfs_fop_write_iter+0x145/0x1d0
> [  238.728530]  vfs_write+0x307/0x420
> [  238.729401]  ksys_write+0x6d/0xe0
> [  238.730223]  __x64_sys_write+0x1d/0x30
> [  238.731116]  x64_sys_call+0x1704/0x21c0
> [  238.732018]  do_syscall_64+0xa3/0x7c0
> [  238.732907]  ? irqentry_exit+0x42/0x5a0
> [  238.733815]  ? srso_alias_return_thunk+0x5/0xfbef5
> [  238.734877]  ? do_syscall_64+0x58/0x7c0
> [  238.735768]  ? exc_page_fault+0x98/0x1c0
> [  238.736709]  entry_SYSCALL_64_after_hwframe+0x76/0x7e
> [  238.737825] RIP: 0033:0x7f2d01b10104
> [  238.738673] Code: 89 02 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 8d 05 e1 08 2e 00 8b 00 85 c0 75 13 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 54 f3 c3 66 90 41 54 55 49 89 d4 53 48 5
> [  238.742405] RSP: 002b:00007ffd09b75168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
> [  238.743966] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f2d01b10104
> [  238.745478] RDX: 0000000000000002 RSI: 00007ffd09b75250 RDI: 0000000000000003
> [  238.746962] RBP: 00007ffd09b75250 R08: 0000000000000002 R09: 00007f2d02060540
> [  238.748466] R10: 00000000000001b6 R11: 0000000000000246 R12: 0000555ec468b280
> [  238.749943] R13: 0000000000000002 R14: 00007f2d01de7760 R15: 0000000000000002
> [  238.751418]  </TASK>
> [  238.752010] Modules linked in:
> [  238.752772] CR2: 0000000000080060
> [  238.753571] ---[ end trace 0000000000000000 ]---
> [  238.754628] RIP: 0010:amd_iommu_probe_device+0x53/0x470
> [  238.755772] Code: b0 0f 84 6d 01 00 00 31 f6 e8 e9 d2 ff ff 85 c0 0f 88 45 01 00 00 4c 89 e7 0f b7 d8 e8 96 d6 ff ff 48 85 c0 0f 84 31 01 00 00 <48> 8b 40 60 0f b7 40 1a 39 c3 0f 8f 21 01 00 00 4c 89 e7 e8 6
> [  238.759542] RSP: 0018:ffffd317452ab948 EFLAGS: 00010206
> [  238.760706] RAX: 0000000000080000 RBX: 0000000000000200 RCX: 0000000000000000
> [  238.762210] RDX: ffff8e374195f000 RSI: 0000000000000200 RDI: ffff8e376ff580d0
> [  238.763708] RBP: ffffd317452ab970 R08: 0000000000080000 R09: ffff8e375156e380
> [  238.765248] R10: ffff8e37707264b8 R11: ffffffffb0f28a20 R12: ffff8e376ff580d0
> [  238.766761] R13: ffff8e376ff580d0 R14: 00000000ffffffff R15: ffff8e3740d0f5d8
> [  238.768279] FS:  00007f2d02060540(0000) GS:ffff8e37ff749000(0000) knlGS:0000000000000000
> [  238.769959] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [  238.771227] CR2: 0000000000080060 CR3: 0000000101d00004 CR4: 0000000000770ef0
> [  238.772767] PKRU: 55555554
> [  238.773488] note: tee[1436] exited with irqs disabled

Hi Alejandro,

Seems like upstream doesnt have this issue anymore
This patch fixed it: 07d0f496fe7ec5abe3bee7e38be709521567bb33

Thanks
Sairaj