Re: WARN_ON after gic_reserve_range

From: John Garry
Date: Tue Nov 20 2018 - 12:30:19 EST

On 20/11/2018 16:23, Jan Glauber wrote:
Hi Marc,

with 4.20-rc3 I see two WARN_ON's firing on a ThunderX2 system that come from
commit 3fb68faee867 (irqchip/gic-v3-its: Register LPI tables with EFI config table).

Global efi_memreserve_root is NULL as it will only be set when early initcalls are
running, but from the backtrace the WARN_ON's are running even earlier (init_IRQ).

Am I the only one seeing this?


I see it also:

[ 0.000000] Booting Linux on physical CPU 0x0000010000 [0x410fd082]
[ 0.000000] Linux version 4.20.0-rc3 (johnpgarry@johnpgarry-ThinkCentre-M93p) (gcc version 7.3.1 20180425 [linaro-7.3-2018.05-rc1 revision 38aec9a676236eaa42ca03ccb3a6c1dd0182c29f] (Linaro GCC 7.3-2018.05-rc1)) #971 SMP PREEMPT Tue Nov 20 17:15:03 GMT 2018
[ 0.000000] efi: Getting EFI parameters from FDT:
[ 0.000000] efi: EFI v2.60 by EDK II
[ 0.000000] efi: SMBIOS=0x3f050000 SMBIOS 3.0=0x39b00000 ACPI=0x39bd0000 ACPI 2.0=

...


[ 0.000000] ITS@0x00000408c6000000: allocated 65536 Virtual CPUs @1fb9d80000 (flat, esz 8, psz 4K, shr 1)
[ 0.000000] ITS@0x00000408c6000000: allocated 512 Interrupt Collections @1fbb977000 (flat, esz 8, psz 4K, shr 1)
[ 0.000000] WARNING: CPU: 0 PID: 0 at drivers/irqchip/irq-gic-v3-its.c:1696 its_init+0x360/0x5f4
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.20.0-rc3 #971
[ 0.000000] pstate: 00000085 (nzcv daIf -PAN -UAO)
[ 0.000000] pc : its_init+0x360/0x5f4
[ 0.000000] lr : its_init+0x35c/0x5f4
[ 0.000000] sp : ffff000009183ca0
[ 0.000000] x29: ffff000009183ca0 x28: ffff7dfffe67b3e4
[ 0.000000] x27: 0000000000000001 x26: ffff801fbb928000
[ 0.000000] x25: ffff000009325360 x24: ffff00000918c8c8
[ 0.000000] x23: ffff801fbb802100 x22: ffff00000918c8c8
[ 0.000000] x21: ffff000009189000 x20: ffff0000091b8000
[ 0.000000] x19: ffff000009325000 x18: ffffffffffffffff
[ 0.000000] x17: 0000000001f4d3b5 x16: 0000000000000000
[ 0.000000] x15: ffff0000091896c8 x14: ffff801fbb97389b
[ 0.000000] x13: ffff801fbb97389a x12: 2074707572726574
[ 0.000000] x11: ffff000009183a00 x10: ffff000009183a00
[ 0.000000] x9 : ffff7e007eeed400 x8 : ffff801fbbb60000
[ 0.000000] x7 : a2a2a2a2a2a2a2a2 x6 : 0000801ff2d1c000
[ 0.000000] x5 : ffff7e0000000000 x4 : ffff00000918c8c8
[ 0.000000] x3 : ffff801fbbb50000 x2 : 0000000000000000
[ 0.000000] x1 : 0000000000010000 x0 : 00000000ffffffed
[ 0.000000] Call trace:
[ 0.000000] its_init+0x360/0x5f4
[ 0.000000] gic_init_bases+0x2d4/0x2f4
[ 0.000000] gic_acpi_init+0x154/0x278
[ 0.000000] acpi_match_madt+0x44/0x78
[ 0.000000] acpi_table_parse_entries_array+0x13c/0x214
[ 0.000000] acpi_table_parse_entries+0x40/0x60
[ 0.000000] acpi_table_parse_madt+0x24/0x2c
[ 0.000000] __acpi_probe_device_table+0x80/0xdc
[ 0.000000] irqchip_init+0x30/0x38
[ 0.000000] init_IRQ+0xfc/0x130
[ 0.000000] start_kernel+0x288/0x418
[ 0.000000] ---[ end trace c841ef100bdd09a6 ]---
[ 0.000000] GICv3: using LPI property table @0x0000001fbbb50000
[ 0.000000] ITS: Using DirectLPI for VPE invalidation
[ 0.000000] ITS: Enabling GICv4 support
[ 0.000000] WARNING: CPU: 0 PID: 0 at drivers/irqchip/irq-gic-v3-its.c:2096 its_cpu_init+0x3a0/0x470
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 4.20.0-rc3 #971
[ 0.000000] pstate: 00000085 (nzcv daIf -PAN -UAO)
[ 0.000000] pc : its_cpu_init+0x3a0/0x470
[ 0.000000] lr : its_cpu_init+0x39c/0x470
[ 0.000000] sp : ffff000009183cf0
[ 0.000000] x29: ffff000009183cf0 x28: ffff7dfffe67b3e4
[ 0.000000] x27: 0000000000000001 x26: ffff801fbb928000
[ 0.000000] x25: ffff000008fc7000 x24: ffff000009500070
[ 0.000000] x23: ffff7e007eeed800 x22: ffff000009325000
[ 0.000000] x21: ffff000009500000 x20: ffff000009189000
[ 0.000000] x19: ffff0000091b8000 x18: ffffffffffffffff
[ 0.000000] x17: 0000000000000000 x16: ffff000009192580
[ 0.000000] x15: ffff0000091896c8 x14: ffff0000892ed70f
[ 0.000000] x13: ffff0000092ed71d x12: ffff0000091a1000
[ 0.000000] x11: ffff000009183970 x10: ffff000009189940
[ 0.000000] x9 : 00000000ffffffd0 x8 : ffff0000086029d0
[ 0.000000] x7 : 6e696c62616e4520 x6 : 0000000000000110
[ 0.000000] x5 : ffff7e0000000000 x4 : 0000000000000010
[ 0.000000] x3 : 000000000000ffff x2 : 0000000000000000
[ 0.000000] x1 : 0000000000010000 x0 : 00000000ffffffed
[ 0.000000] Call trace:
[ 0.000000] its_cpu_init+0x3a0/0x470
[ 0.000000] gic_init_bases+0x2d8/0x2f4
[ 0.000000] gic_acpi_init+0x154/0x278
[ 0.000000] acpi_match_madt+0x44/0x78
[ 0.000000] acpi_table_parse_entries_array+0x13c/0x214
[ 0.000000] acpi_table_parse_entries+0x40/0x60
[ 0.000000] acpi_table_parse_madt+0x24/0x2c
[ 0.000000] __acpi_probe_device_table+0x80/0xdc
[ 0.000000] irqchip_init+0x30/0x38
[ 0.000000] init_IRQ+0xfc/0x130
[ 0.000000] start_kernel+0x288/0x418
[ 0.000000] ---[ end trace c841ef100bdd09a7 ]---
[ 0.000000] GICv3: CPU0: using allocated LPI pending table @0x0000001fbbb60000
[ 0.000000] arch_timer: Enabling global workaround for HiSilicon erratum 161010101
[ 0.000000] arch_timer: CPU0: Trapping CNTVCT access


[ 0.000000] WARNING: CPU: 0 PID: 0 at drivers/irqchip/irq-gic-v3-its.c:1696 its_init+0x36c/0x608
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.20.0-rc3-jang+ #69
[ 0.000000] pstate: 60000089 (nZCv daIf -PAN -UAO)
[ 0.000000] pc : its_init+0x36c/0x608
[ 0.000000] lr : its_init+0x368/0x608
[ 0.000000] sp : ffff000008e53c60
[ 0.000000] x29: ffff000008e53c60 x28: ffff7dfffe6807a4
[ 0.000000] x27: 0000000000000001 x26: ffff80267b4c2100
[ 0.000000] x25: ffff000008ffe930 x24: ffff000008e5d9c8
[ 0.000000] x23: ffff80267bc10300 x22: ffff000008e5d9c8
[ 0.000000] x21: ffff000008e59000 x20: ffff000008f12000
[ 0.000000] x19: ffff000008ffe000 x18: ffffffffffffffff
[ 0.000000] x17: 0000000000000009 x16: 0000000000000000
[ 0.000000] x15: ffff000008e59648 x14: ffff000088fa616f
[ 0.000000] x13: ffff000008fa617d x12: ffff000008e7e000
[ 0.000000] x11: ffff000008e53900 x10: ffff000008e59eb0
[ 0.000000] x9 : ffff000008e3e018 x8 : ffff00000875ac58
[ 0.000000] x7 : 206f6e203a746e65 x6 : 000000000000018c
[ 0.000000] x5 : 0000000000000001 x4 : 0000000000000000
[ 0.000000] x3 : 0000000000000001 x2 : 4f419eae5e0eb800
[ 0.000000] x1 : 0000000000000000 x0 : 00000000ffffffed
[ 0.000000] Call trace:
[ 0.000000] its_init+0x36c/0x608
[ 0.000000] gic_init_bases+0x288/0x300
[ 0.000000] gic_acpi_init+0x124/0x248
[ 0.000000] acpi_match_madt+0x4c/0x88
[ 0.000000] acpi_table_parse_entries_array+0x134/0x220
[ 0.000000] acpi_table_parse_entries+0x70/0x98
[ 0.000000] acpi_table_parse_madt+0x40/0x50
[ 0.000000] __acpi_probe_device_table+0x88/0xe4
[ 0.000000] irqchip_init+0x38/0x40
[ 0.000000] init_IRQ+0xcc/0x100
[ 0.000000] start_kernel+0x2fc/0x490
[ 0.000000] ---[ end trace 41868d15bb5cf8f6 ]---

--Jan

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