Public bug reported:
CONFIG_PCI_MSI_ARCH_FALLBACKS should be selected for arm64, just like in
J/linux.
This causes boot warnings on arm64 xgene like:
-------------
[ 28.297202] ------------[ cut here ]------------
[ 28.297203] WARNING: CPU: 4 PID: 229 at include/linux/msi.h:262
msix_capability_init+0x2e4/0x344
[ 28.297216] Modules linked in: mlx4_core(+) gpio_dwapb gpio_keys_polled
ahci_xgene gpio_xgene_sb crct10dif_ce aes_neon_bs aes_neon_blk crypto_simd
cryptd
[ 28.297232] CPU: 4 PID: 229 Comm: systemd-udevd Not tainted
5.15.0-1004-realtime #4-Ubuntu
[ 28.297236] Hardware name: HP ProLiant m400 Server Cartridge (DT)
[ 28.297239] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 28.297243] pc : msix_capability_init+0x2e4/0x344
[ 28.297246] lr : msix_capability_init+0x140/0x344
[ 28.297250] sp : ffff80001458b550
[ 28.297251] x29: ffff80001458b550 x28: 0000000000000000 x27: 0000000000102cc2
[ 28.297256] x26: ffff00000a223000 x25: 0000000000000011 x24: 0000000000000000
[ 28.297260] x23: ffff00000a2230d0 x22: 0000000000000011 x21: ffff000005bee700
[ 28.297264] x20: 0000000000000000 x19: ffff00000a223000 x18: ffffffffffffffff
[ 28.297268] x17: 0000000000000000 x16: 0000000000000068 x15: ffff800012789451
[ 28.297272] x14: 00000000fffffffd x13: 0a73746962204331 x12: ffff8000128f7000
[ 28.297276] x11: ffff8000128f5000 x10: 000000a13487c000 x9 : ffff80001079f0dc
[ 28.297280] x8 : ffff000009cd2c00 x7 : 0000000000000028 x6 : ffff000009cd2980
[ 28.297284] x5 : 0000000000000040 x4 : 0000000000000000 x3 : ffff00000a223338
[ 28.297288] x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
[ 28.297292] Call trace:
[ 28.297294] msix_capability_init+0x2e4/0x344
[ 28.297298] __pci_enable_msix_range+0x1d4/0x23c
[ 28.297301] pci_enable_msix_range+0x24/0x30
[ 28.297304] mlx4_enable_msi_x+0xd0/0x390 [mlx4_core]
[ 28.297360] mlx4_load_one+0x578/0xe74 [mlx4_core]
[ 28.297401] __mlx4_init_one+0x364/0x418 [mlx4_core]
[ 28.297441] mlx4_init_one+0x2a0/0x310 [mlx4_core]
[ 28.297482] local_pci_probe+0x4c/0xc0
[ 28.297487] pci_device_probe+0x120/0x1c0
[ 28.297491] really_probe+0xc4/0x470
[ 28.297499] __driver_probe_device+0x11c/0x190
[ 28.297502] driver_probe_device+0x48/0x110
[ 28.297505] __driver_attach+0xd8/0x1f0
[ 28.297509] bus_for_each_dev+0x7c/0xe0
[ 28.297512] driver_attach+0x30/0x40
[ 28.297515] bus_add_driver+0x154/0x250
[ 28.297518] driver_register+0x84/0x140
[ 28.297522] __pci_register_driver+0x58/0x6c
[ 28.297526] mlx4_init+0x154/0x1000 [mlx4_core]
[ 28.297567] do_one_initcall+0x50/0x2f0
[ 28.297571] do_init_module+0x60/0x280
[ 28.297576] load_module+0x9f0/0xbb0
[ 28.297578] __do_sys_finit_module+0xa8/0x11c
[ 28.297581] __arm64_sys_finit_module+0x2c/0x40
[ 28.297584] invoke_syscall+0x78/0x100
[ 28.297589] el0_svc_common.constprop.0+0x54/0x184
[ 28.297593] do_el0_svc+0x34/0x9c
[ 28.297596] el0_svc+0x30/0x150
[ 28.297603] el0t_64_sync_handler+0xa4/0x130
[ 28.297606] el0t_64_sync+0x1a4/0x1a8
[ 28.297609] ---[ end trace 0000000000000002 ]---
[ 31.897760] ------------[ cut here ]------------
[ 31.897763] WARNING: CPU: 4 PID: 229 at include/linux/msi.h:268
free_msi_irqs+0x6c/0x150
[ 31.897771] Modules linked in: mlx4_core(+) gpio_dwapb gpio_keys_polled
ahci_xgene gpio_xgene_sb crct10dif_ce aes_neon_bs aes_neon_blk crypto_simd
cryptd
[ 31.897782] CPU: 4 PID: 229 Comm: systemd-udevd Tainted: G W
5.15.0-1004-realtime #4-Ubuntu
[ 31.897785] Hardware name: HP ProLiant m400 Server Cartridge (DT)
[ 31.897787] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 31.897791] pc : free_msi_irqs+0x6c/0x150
[ 31.897794] lr : msix_capability_init+0x2d0/0x344
[ 31.897797] sp : ffff80001458b510
[ 31.897799] x29: ffff80001458b510 x28: 0000000000000000 x27: 0000000000102cc2
[ 31.897803] x26: ffff00000a223000 x25: 0000000000000011 x24: 0000000000000000
[ 31.897807] x23: ffff00000a2230d0 x22: ffff00000a223000 x21: ffff00000a223338
[ 31.897811] x20: 00000000ffffffed x19: ffff00000a2230d0 x18: ffffffffffffffff
[ 31.897815] x17: 0000000000000000 x16: 0000000000000068 x15: ffff800012789451
[ 31.897819] x14: 00000000fffffffd x13: 0a73746962204331 x12: ffff8000128f7000
[ 31.897823] x11: ffff8000128f5000 x10: 000000a13487c000 x9 : ffff80001079f9d0
[ 31.897827] x8 : ffff000009cd2c00 x7 : 0000000000000028 x6 : ffff000009cd2980
[ 31.897831] x5 : 0000000000000040 x4 : 0000000000000000 x3 : ffff00000a223338
[ 31.897835] x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
[ 31.897838] Call trace:
[ 31.897840] free_msi_irqs+0x6c/0x150
[ 31.897843] msix_capability_init+0x2d0/0x344
[ 31.897846] __pci_enable_msix_range+0x1d4/0x23c
[ 31.897849] pci_enable_msix_range+0x24/0x30
[ 31.897852] mlx4_enable_msi_x+0xd0/0x390 [mlx4_core]
[ 31.897899] mlx4_load_one+0x578/0xe74 [mlx4_core]
[ 31.897940] __mlx4_init_one+0x364/0x418 [mlx4_core]
[ 31.897980] mlx4_init_one+0x2a0/0x310 [mlx4_core]
[ 31.898021] local_pci_probe+0x4c/0xc0
[ 31.898025] pci_device_probe+0x120/0x1c0
[ 31.898029] really_probe+0xc4/0x470
[ 31.898033] __driver_probe_device+0x11c/0x190
[ 31.898036] driver_probe_device+0x48/0x110
[ 31.898039] __driver_attach+0xd8/0x1f0
[ 31.898043] bus_for_each_dev+0x7c/0xe0
[ 31.898046] driver_attach+0x30/0x40
[ 31.898049] bus_add_driver+0x154/0x250
[ 31.898052] driver_register+0x84/0x140
[ 31.898055] __pci_register_driver+0x58/0x6c
[ 31.898059] mlx4_init+0x154/0x1000 [mlx4_core]
[ 31.898100] do_one_initcall+0x50/0x2f0
[ 31.898103] do_init_module+0x60/0x280
[ 31.898106] load_module+0x9f0/0xbb0
[ 31.898109] __do_sys_finit_module+0xa8/0x11c
[ 31.898111] __arm64_sys_finit_module+0x2c/0x40
[ 31.898114] invoke_syscall+0x78/0x100
[ 31.898118] el0_svc_common.constprop.0+0x54/0x184
[ 31.898122] do_el0_svc+0x34/0x9c
[ 31.898126] el0_svc+0x30/0x150
[ 31.898130] el0t_64_sync_handler+0xa4/0x130
[ 31.898133] el0t_64_sync+0x1a4/0x1a8
[ 31.898136] ---[ end trace 0000000000000003 ]---
[ 32.898253] pci_bus 0000:01: 2-byte config write to 0000:01:00.0 offset 0x9e
may corrupt adjacent RW1C bits
-------------
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Krzysztof Kozlowski (krzk)
Status: New
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Krzysztof Kozlowski (krzk)
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https://bugs.launchpad.net/bugs/1959404
Title:
Enable CONFIG_PCI_MSI_ARCH_FALLBACKS in Jammy realtime arm64 kernel
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