Hi folks, syscore_resume() doesn't like when the AMD iommu driver enables interrupts in its ->resume hook when I resume the box from suspend to RAM.
All kinds of warnings get triggered too: [ 17.386830] WARNING: CPU: 0 PID: 2 at kernel/time/timekeeping.c:824 ktime_get+0x8d/0xa0 [ 17.386830] WARNING: CPU: 0 PID: 2 at kernel/time/timekeeping.c:867 ktime_get_with_offset+0xda/0xf0 [ 17.386830] WARNING: CPU: 0 PID: 2 at kernel/time/timekeeping.c:824 ktime_get+0x8d/0xa0 [ 17.386830] WARNING: CPU: 0 PID: 2 at kernel/time/timekeeping.c:867 ktime_get_with_offset+0xda/0xf0 [ 17.386830] WARNING: CPU: 0 PID: 1576 at drivers/base/syscore.c:103 syscore_resume+0x12d/0x160 but when I comment out the amd_iommu_enable_interrupts() call in the resume hook, all is fine and quiet and box resumes. I'll try to bisect later to try to pinpoint it better because I don't see what recent change would've caused this. But someone might have a better idea so CC the usual suspects. Thx. [ 17.386830] ------------[ cut here ]------------ [ 17.386830] Interrupts enabled after amd_iommu_resume+0x0/0x40 [ 17.386830] WARNING: CPU: 0 PID: 1576 at drivers/base/syscore.c:103 syscore_resume+0x12d/0x160 [ 17.386830] Modules linked in: nls_ascii nls_cp437 vfat fat joydev iwlmvm edac_mce_amd mac80211 edac_core kvm_amd libarc4 kvm irqbypass crct10dif_pclmul crc32_pclmul snd_hda_codec_realtek crc32c_intel iwlwifi ghash_clmulni_intel amdgpu snd_hda_codec_generic snd_hda_codec_h dmi snd_hda_intel snd_intel_dspcfg snd_hda_codec rtsx_pci_sdmmc aesni_intel snd_hwdep mmc_core glue_helper wmi_bmof snd_hda_core libaes cr ypto_simd snd_pcm sp5100_tco cryptd nvram watchdog cfg80211 efi_pstore k10temp ledtrig_audio snd_timer ucsi_acpi rapl pcspkr rtsx_pci i2c_ piix4 ccp r8169 gpu_sched mfd_core typec_ucsi snd typec wmi soundcore battery ac video i2c_multi_instantiate acpi_cpufreq i2c_scmi button psmouse serio_raw nvme nvme_core [ 17.386830] CPU: 0 PID: 1576 Comm: hib.sh Tainted: G W 5.11.0-rc2+ #2 [ 17.386830] Hardware name: LENOVO 20Y2MMMMCC/20Y2MMMMCC, BIOS R1BET58W(1.27 ) 10/20/2020 [ 17.386830] RIP: 0010:syscore_resume+0x12d/0x160 [ 17.386830] Code: ff ff ff 80 3d f7 73 fb 00 00 0f 1f 00 0f 85 3b ff ff ff 48 8b 73 18 48 c7 c7 05 4f 15 82 c6 05 dc 73 fb 00 01 e8 41 2c 2e 00 <0f> 0b e9 1d ff ff ff 80 3d ca 73 fb 00 00 0f 85 d5 fe ff ff 48 c7 [ 17.386830] RSP: 0018:ffffc9000171bdd0 EFLAGS: 00010286 [ 17.386830] RAX: 0000000000000000 RBX: ffffffff82539960 RCX: 0000000000000000 [ 17.386830] RDX: 0000000000000001 RSI: 00000000fff7ffff RDI: 00000000ffffffff [ 17.386830] RBP: 0000000000000003 R08: 0000000000000000 R09: ffffc9000171bc08 [ 17.386830] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 [ 17.386830] R13: 0000000000000000 R14: ffffc9000171bde8 R15: 0000000000000000 [ 17.386830] FS: 00007fc7e51da740(0000) GS:ffff8883fae00000(0000) knlGS:0000000000000000 [ 17.386830] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 17.386830] CR2: 000055bbb352a798 CR3: 0000000172639000 CR4: 0000000000350ef0 [ 17.386830] Call Trace: [ 17.386830] suspend_devices_and_enter+0x6d4/0x810 [ 17.386830] pm_suspend.cold+0x322/0x37b [ 17.386830] state_store+0x8b/0x100 [ 17.386830] kernfs_fop_write+0xe5/0x1d0 [ 17.386830] vfs_write+0xf0/0x2c0 [ 17.386830] ksys_write+0x70/0x100 [ 17.386830] ? fpregs_assert_state_consistent+0x1e/0x50 [ 17.386830] do_syscall_64+0x33/0x80 [ 17.386830] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 17.386830] RIP: 0033:0x7fc7e52cbed3 [ 17.386830] Code: 8b 15 c1 ef 0c 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18 [ 17.386830] RSP: 002b:00007fffa7f50878 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 17.386830] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fc7e52cbed3 [ 17.386830] RDX: 0000000000000004 RSI: 0000563349f39a40 RDI: 0000000000000001 [ 17.386830] RBP: 0000563349f39a40 R08: 000000000000000a R09: 0000000000000003 [ 17.386830] R10: 0000563349f4f7f0 R11: 0000000000000246 R12: 0000000000000004 [ 17.386830] R13: 00007fc7e539c6a0 R14: 0000000000000004 R15: 00007fc7e539c8a0 [ 17.386830] ---[ end trace b6887b5ff5d2a76e ]--- -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu