Hi Jesse, Hi Tony, Since v5.15-rc1 I've been having problems with enabling SR-IOV VFs on my private workstation with an Intel 82599 NIC with the ixgbe driver. I haven't had time to bisect or look closer but since it still happens on v5.15-rc3 I wanted to at least check if you're aware of the problem as I couldn't find anything on the web. I get below Oops when trying "echo 2 > /sys/bus/pci/.../sriov_numvfs" and suspect that the earlier ACPI messages could have something to do with that, absolutely not an ACPI expert though. If there is a need I could do a bisect. Thanks, Niklas dmesg output: [ 6.112738] ixgbe 0000:03:00.0: registered PHC device on enp3s0 [ 6.286041] ixgbe 0000:03:00.0 enp3s0: detected SFP+: 9 [ 6.954994] ACPI: \: failed to evaluate _DSM (0x1001) [ 6.955000] ACPI: \: failed to evaluate _DSM (0x1001) [ 6.955002] ACPI: \: failed to evaluate _DSM (0x1001) [ 6.955003] ACPI: \: failed to evaluate _DSM (0x1001) [ 7.155246] ACPI: \: failed to evaluate _DSM (0x1001) [ 7.155251] ACPI: \: failed to evaluate _DSM (0x1001) [ 7.155253] ACPI: \: failed to evaluate _DSM (0x1001) [ 7.155254] ACPI: \: failed to evaluate _DSM (0x1001) ... [ 136.883365] ixgbe 0000:03:00.0 enp3s0: SR-IOV enabled with 2 VFs [ 136.883489] ixgbe 0000:03:00.0: removed PHC on enp3s0 [ 136.983130] ixgbe 0000:03:00.0: Multiqueue Enabled: Rx Queue count = 4, Tx Queue count = 4 XDP Queue count = 0 [ 137.003753] ixgbe 0000:03:00.0: registered PHC device on enp3s0 [ 137.179126] ixgbe 0000:03:00.0 enp3s0: detected SFP+: 9 [ 137.217508] BUG: kernel NULL pointer dereference, address: 0000000000000298 [ 137.217515] #PF: supervisor read access in kernel mode [ 137.217518] #PF: error_code(0x0000) - not-present page [ 137.217520] PGD 0 P4D 0 [ 137.217523] Oops: 0000 [#1] PREEMPT SMP NOPTI [ 137.217527] CPU: 19 PID: 1058 Comm: zsh Not tainted 5.15.0-rc3-niklas #25 ad1c778d4b5b0053fcbb87077df466d6ee92e65b [ 137.217532] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./X570 Creator, BIOS P3.40 01/28/2021 [ 137.217534] RIP: 0010:acpi_pci_find_companion+0x9a/0x100 [ 137.217540] Code: 83 e0 07 41 c1 e5 0d 41 81 e5 00 00 1f 00 41 09 c5 0f b6 83 79 ff ff ff 45 89 ee 83 e8 01 3c 01 48 8b 43 40 41 0f 96 c7 31 ed <4c> 8b a0 98 02 00 00 4c 89 e7 e8 97 57 04 00 49 8d 7c 24 f0 44 89 [ 137.217543] RSP: 0018:ffffbb978392bb88 EFLAGS: 00010246 [ 137.217545] RAX: 0000000000000000 RBX: ffff9cb20c0b80d0 RCX: 00000000000000a4 [ 137.217548] RDX: ffff9cb1cfdddf40 RSI: 0000000000000100 RDI: ffffffff897474e0 [ 137.217549] RBP: 0000000000000000 R08: 0000000000000004 R09: ffffbb978392bb94 [ 137.217551] R10: ffff9cb1d3588900 R11: 0000000000000004 R12: ffff9cb20c0b8000 [ 137.217552] R13: 0000000000100000 R14: 0000000000100000 R15: 0000000000000000 [ 137.217555] FS: 00007f0f792de140(0000) GS:ffff9cc0eeec0000(0000) knlGS:0000000000000000 [ 137.217557] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 137.217559] CR2: 0000000000000298 CR3: 0000000108492000 CR4: 0000000000350ee0 [ 137.217561] Call Trace: [ 137.217564] pci_set_acpi_fwnode+0x34/0x60 [ 137.217567] pci_setup_device+0xe1/0x270 [ 137.217572] pci_iov_add_virtfn+0x27e/0x330 [ 137.217577] sriov_enable+0x219/0x3e0 [ 137.217580] ixgbe_pci_sriov_configure+0xf3/0x170 [ixgbe 7655574dbcea556149b0aede65e6825fd4dfd120] [ 137.217599] sriov_numvfs_store+0xbe/0x130 [ 137.217603] kernfs_fop_write_iter+0x11c/0x1b0 [ 137.217607] new_sync_write+0x15c/0x1f0 [ 137.217612] vfs_write+0x1eb/0x280 [ 137.217615] ksys_write+0x67/0xe0 [ 137.217618] do_syscall_64+0x5c/0x80 [ 137.217622] ? syscall_exit_to_user_mode+0x23/0x40 [ 137.217626] ? do_syscall_64+0x69/0x80 [ 137.217629] ? syscall_exit_to_user_mode+0x23/0x40 [ 137.217632] ? do_syscall_64+0x69/0x80 [ 137.217635] ? syscall_exit_to_user_mode+0x23/0x40 [ 137.217638] ? do_syscall_64+0x69/0x80 [ 137.217640] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 137.217645] RIP: 0033:0x7f0f793ce907 [ 137.217648] Code: 0d 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24 [ 137.217650] RSP: 002b:00007ffdb6a8e7e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 137.217652] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f0f793ce907 [ 137.217654] RDX: 0000000000000002 RSI: 0000564d342b2240 RDI: 0000000000000001 [ 137.217656] RBP: 0000564d342b2240 R08: 000000000000000a R09: 0000000000000000 [ 137.217657] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 [ 137.217659] R13: 00007f0f794a0520 R14: 0000000000000002 R15: 00007f0f794a0700 [ 137.217662] Modules linked in: xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp ip6table_mangle ip6table_nat ip6table_filter ip6_tables iptable_mangle iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_filter bridge stp llc cmac algif_hash algif_skcipher af_alg bnep nct6683 lm92 dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua iwlmvm snd_hda_codec_realtek intel_rapl_msr snd_hda_codec_generic intel_rapl_common amdgpu ledtrig_audio snd_hda_codec_hdmi snd_hda_intel edac_mce_amd snd_intel_dspcfg gpu_sched snd_intel_sdw_acpi kvm_amd drm_ttm_helper mac80211 ttm snd_hda_codec snd_usb_audio btusb snd_usbmidi_lib kvm drm_kms_helper btrtl snd_rawmidi btbcm snd_seq_device snd_hda_core btintel mc snd_hwdep wmi_bmof mxm_wmi intel_wmi_thunderbolt libarc4 snd_pcm irqbypass cec crct10dif_pclmul crc32_pclmul iwlwifi ghash_clmulni_intel bluetooth agpgart snd_timer aesni_intel syscopyarea sp5100_tco sysfillrect crypto_simd atlantic ecdh_generic snd joydev [ 137.217722] cryptd ecc sysimgblt rapl dm_mod pcspkr k10temp ccp i2c_piix4 fb_sys_fops mousedev soundcore crc16 cfg80211 ixgbe macsec igb mdio_devres rfkill i2c_algo_bit libphy thunderbolt mdio wireguard dca curve25519_x86_64 libchacha20poly1305 chacha_x86_64 poly1305_x86_64 tpm_crb libblake2s blake2s_x86_64 libcurve25519_generic tpm_tis wmi tpm_tis_core libchacha libblake2s_generic tpm ip6_udp_tunnel rng_core udp_tunnel pinctrl_amd mac_hid acpi_cpufreq usbip_host usbip_core sg drm crypto_user fuse bpf_preload ip_tables x_tables hid_logitech_hidpp hid_logitech_dj usbhid btrfs blake2b_generic libcrc32c crc32c_generic xor raid6_pq crc32c_intel sr_mod cdrom xhci_pci xhci_pci_renesas vfat fat [ 137.217772] CR2: 0000000000000298 [ 137.217774] ---[ end trace b5fd99c7b5c7e77b ]--- [ 137.217776] RIP: 0010:acpi_pci_find_companion+0x9a/0x100 [ 137.217779] Code: 83 e0 07 41 c1 e5 0d 41 81 e5 00 00 1f 00 41 09 c5 0f b6 83 79 ff ff ff 45 89 ee 83 e8 01 3c 01 48 8b 43 40 41 0f 96 c7 31 ed <4c> 8b a0 98 02 00 00 4c 89 e7 e8 97 57 04 00 49 8d 7c 24 f0 44 89 [ 137.217781] RSP: 0018:ffffbb978392bb88 EFLAGS: 00010246 [ 137.217783] RAX: 0000000000000000 RBX: ffff9cb20c0b80d0 RCX: 00000000000000a4 [ 137.217784] RDX: ffff9cb1cfdddf40 RSI: 0000000000000100 RDI: ffffffff897474e0 [ 137.217786] RBP: 0000000000000000 R08: 0000000000000004 R09: ffffbb978392bb94 [ 137.217788] R10: ffff9cb1d3588900 R11: 0000000000000004 R12: ffff9cb20c0b8000 [ 137.217789] R13: 0000000000100000 R14: 0000000000100000 R15: 0000000000000000 [ 137.217791] FS: 00007f0f792de140(0000) GS:ffff9cc0eeec0000(0000) knlGS:0000000000000000 [ 137.217793] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 137.217795] CR2: 0000000000000298 CR3: 0000000108492000 CR4: 0000000000350ee0
