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linux/arch/mips
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Álvaro Fernández Rojas ab327f8acd mips: bmips: BCM6358: disable RAC flush for TP1 
RAC flush causes kernel panics on BCM6358 with EHCI/OHCI when booting from TP1:
[    3.881739] usb 1-1: new high-speed USB device number 2 using ehci-platform
[    3.895011] Reserved instruction in kernel code[#1]:
[    3.900113] CPU: 0 PID: 1 Comm: init Not tainted 5.10.16 #0
[    3.905829] $ 0   : 00000000 10008700 00000000 77d94060
[    3.911238] $ 4   : 7fd1f088 00000000 81431cac 81431ca0
[    3.916641] $ 8   : 00000000 ffffefff 8075cd34 00000000
[    3.922043] $12   : 806f8d40 f3e812b7 00000000 000d9aaa
[    3.927446] $16   : 7fd1f068 7fd1f080 7ff559b8 81428470
[    3.932848] $20   : 00000000 00000000 55590000 77d70000
[    3.938251] $24   : 00000018 00000010
[    3.943655] $28   : 81430000 81431e60 81431f28 800157fc
[    3.949058] Hi    : 00000000
[    3.952013] Lo    : 00000000
[    3.955019] epc   : 80015808 setup_sigcontext+0x54/0x24c
[    3.960464] ra    : 800157fc setup_sigcontext+0x48/0x24c
[    3.965913] Status: 10008703	KERNEL EXL IE
[    3.970216] Cause : 00800028 (ExcCode 0a)
[    3.974340] PrId  : 0002a010 (Broadcom BMIPS4350)
[    3.979170] Modules linked in: ohci_platform ohci_hcd fsl_mph_dr_of ehci_platform ehci_fsl ehci_hcd gpio_button_hotplug usbcore nls_base usb_common
[    3.992907] Process init (pid: 1, threadinfo=(ptrval), task=(ptrval), tls=77e22ec8)
[    4.000776] Stack : 81431ef4 7fd1f080 81431f28 81428470 7fd1f068 81431edc 7ff559b8 81428470
[    4.009467]         81431f28 7fd1f080 55590000 77d70000 77d5498c 80015c70 806f0000 8063ae74
[    4.018149]         08100002 81431f28 0000000a 08100002 81431f28 0000000a 77d6b418 00000003
[    4.026831]         ffffffff 80016414 80080734 81431ecc 81431ecc 00000001 00000000 04000000
[    4.035512]         77d54874 00000000 00000000 00000000 00000000 00000012 00000002 00000000
[    4.044196]         ...
[    4.046706] Call Trace:
[    4.049238] [<80015808>] setup_sigcontext+0x54/0x24c
[    4.054356] [<80015c70>] setup_frame+0xdc/0x124
[    4.059015] [<80016414>] do_notify_resume+0x1dc/0x288
[    4.064207] [<80011b50>] work_notifysig+0x10/0x18
[    4.069036]
[    4.070538] Code: 8fc300b4  00001025  26240008 <ac820000> ac830004  3c048063  0c0228aa  24846a00  26240010
[    4.080686]
[    4.082517] ---[ end trace 22a8edb41f5f983b ]---
[    4.087374] Kernel panic - not syncing: Fatal exception
[    4.092753] Rebooting in 1 seconds..

Because the bootloader (CFE) is not initializing the Read-ahead cache properly
on the second thread (TP1). Since the RAC was not initialized properly, we
should avoid flushing it at the risk of corrupting the instruction stream as
seen in the trace above.

Fixes: d59098a0e9 ("MIPS: bmips: use generic dma noncoherent ops")
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2023-03-18 14:36:06 +01:00
..
alchemy mips: alchemy: gpio: Include the right header 2022-11-11 15:45:37 +01:00
ar7 mips: ar7: convert to CONFIG_COMMON_CLK 2021-06-08 17:00:09 +02:00
ath25 MIPS: ath25: Constify static irq_domain_ops 2022-02-22 09:39:03 +01:00
ath79 MIPS: ath79: Remove one of the identical args in early_printk 2022-07-08 15:13:26 +02:00
bcm47xx MIPS: BCM47XX: Add support for Linksys E2500 V3 2023-02-09 12:54:24 +01:00
bcm63xx MIPS: BCM63xx: Add check for NULL for clk in clk_enable 2022-12-09 23:37:06 +01:00
bmips mips: bmips: BCM6358: disable RAC flush for TP1 2023-03-18 14:36:06 +01:00
boot mips: dts: ralink: mt7621: add phandle to system controller node for watchdog 2023-02-28 23:09:32 +01:00
cavium-octeon MIPS: OCTEON: octeon-usb: Consolidate error messages 2023-01-27 17:09:15 +01:00
cobalt MIPS: Remove empty prom_free_prom_memory functions 2021-01-07 17:11:33 +01:00
configs eth: fealnx: bring back this old driver 2023-03-08 23:22:04 -08:00
crypto crypto: Kconfig - simplify cipher entries 2022-08-26 18:50:43 +08:00
dec MIPS: fix typos in comments 2022-05-04 22:22:59 +02:00
fw MIPS: CFE: Add cfe_die() 2022-07-17 14:52:47 +02:00
generic arch: mips: generic: Add missing of_node_put() in board-ranchu.c 2022-06-21 17:04:30 +02:00
include a few more cleanups/fixes 2023-03-02 10:34:14 -08:00
ingenic MIPS: Kconfig: ingenic: Ensure MACH_INGENIC_GENERIC selects all SoCs 2021-06-01 11:44:47 +02:00
jazz MIPS: fix typos in comments 2022-05-04 22:22:59 +02:00
kernel a few more cleanups/fixes 2023-03-02 10:34:14 -08:00
kvm Kbuild updates for v6.3 2023-02-26 11:53:25 -08:00
lantiq MIPS: vpe-mt: drop physical_memsize 2023-02-20 15:11:01 +01:00
lib MIPS: Simplify __bswapdi2() and __bswapsi2() 2022-09-30 16:50:00 +02:00
loongson2ef MIPS: Prefer cc-option for additions to cflags 2023-01-26 12:41:29 +09:00
loongson32 MIPS: loongson32: Drop obsolete cpufreq platform device 2023-02-13 17:11:00 +01:00
loongson64 MIPS: Loongson64: Add WARN_ON on kexec related kmalloc failed 2022-11-11 15:45:06 +01:00
math-emu MIPS: Fix comment typo 2022-09-12 15:33:24 +02:00
mm MIPS&LoongArch&NIOS2: adjust prototypes of p?d_init() 2022-12-11 18:12:11 -08:00
mti-malta mips: mti-malta: Fix refcount leak in malta-time.c 2022-06-21 17:04:30 +02:00
n64 mips: Add N64 machine type 2021-01-22 11:40:00 +01:00
net bpf, mips: No need to use min() to get MAX_TAIL_CALL_CNT 2022-08-29 15:38:14 +02:00
pci MIPS: pci-mt7620: Use devm_platform_get_and_ioremap_resource() 2023-02-09 13:04:57 +01:00
pic32 MIPS: pic32: treat port as signed integer 2022-11-11 15:53:58 +01:00
power
ralink a few more cleanups/fixes 2023-03-02 10:34:14 -08:00
rb532 MIPS: rb532: move GPIOD definition into C-files 2022-03-30 20:26:26 +02:00
sgi-ip22 driver core: make struct bus_type.uevent() take a const * 2023-01-27 13:45:52 +01:00
sgi-ip27 MIPS: SGI-IP27: Fix platform-device leak in bridge_platform_create() 2022-09-19 16:33:27 +02:00
sgi-ip30 MIPS: SGI-IP30: Fix platform-device leak in bridge_platform_create() 2022-09-19 16:32:54 +02:00
sgi-ip32 MIPS: Allow modules to set board_be_handler 2021-11-09 16:07:26 +01:00
sibyte MIPS: remove orphan sb1250_time_init() declaration 2022-09-24 11:46:58 +02:00
sni MIPS: sni: Fix the build 2021-10-18 18:09:54 +02:00
tools MIPS: fix typos in comments 2022-05-04 22:22:59 +02:00
txx9 MIPS: fix typos in comments 2022-05-04 22:22:59 +02:00
vdso MIPS: remove CONFIG_MIPS_LD_CAN_LINK_VDSO 2023-01-27 17:14:48 +01:00
Kbuild kbuild: remove --include-dir MAKEFLAG from top Makefile 2023-02-05 18:51:22 +09:00
Kbuild.platforms MIPS: Remove VR41xx support 2022-07-14 11:52:29 +02:00
Kconfig MIPS: Workaround clang inline compat branch issue 2023-02-28 23:09:49 +01:00
Kconfig.debug tracing: Refactor TRACE_IRQFLAGS_SUPPORT in Kconfig 2021-08-16 11:37:21 -04:00
Makefile MIPS: Prefer cc-option for additions to cflags 2023-01-26 12:41:29 +09:00
Makefile.postlink kbuild: remove --include-dir MAKEFLAG from top Makefile 2023-02-05 18:51:22 +09:00