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linux/arch/mips
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Álvaro Fernández Rojas 65b7236442 mips: bmips: BCM6358: disable RAC flush for TP1 
[ Upstream commit ab327f8acd ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2023-04-05 11:24:54 +02:00
..
alchemy MIPS: Alchemy: Fix spelling contraction "cant" -> "can't" 2021-07-29 11:41:05 +02:00
ar7 mips: ar7: convert to CONFIG_COMMON_CLK 2021-06-08 17:00:09 +02:00
ath25 mips: Bulk conversion to generic_handle_domain_irq() 2021-08-12 11:39:40 +01:00
ath79 MIPS: of: Introduce helper function to get DTB 2021-02-04 13:34:51 +01:00
bcm47xx MIPS: BCM47XX: Cast memcmp() of function to (void *) 2022-10-26 12:35:30 +02:00
bcm63xx MIPS: BCM63xx: Add check for NULL for clk in clk_enable 2022-12-31 13:14:05 +01:00
bmips mips: bmips: BCM6358: disable RAC flush for TP1 2023-04-05 11:24:54 +02:00
boot MIPS: DTS: CI20: fix otg power gpio 2023-03-10 09:40:12 +01:00
cavium-octeon MIPS: OCTEON: warn only once if deprecated link status is being used 2022-12-31 13:14:05 +01:00
cobalt MIPS: Remove empty prom_free_prom_memory functions 2021-01-07 17:11:33 +01:00
configs Documentation, arch: Remove leftovers from CIFS_WEAK_PW_HASH 2022-01-27 11:05:21 +01:00
crypto asm-generic: unaligned always use struct helpers 2021-05-10 17:50:47 +02:00
dec mips: DEC: honor CONFIG_MIPS_FP_SUPPORT=n 2022-04-08 14:23:38 +02:00
fw MIPS: Remove empty prom_free_prom_memory functions 2021-01-07 17:11:33 +01:00
generic MIPS: generic/yamon-dt: fix uninitialized variable error 2021-11-25 09:48:36 +01:00
include MIPS: Fix a compilation issue 2023-03-17 08:49:01 +01:00
ingenic MIPS: Kconfig: ingenic: Ensure MACH_INGENIC_GENERIC selects all SoCs 2021-06-01 11:44:47 +02:00
jazz MIPS/jazzdma: return error code from jazz_dma_map_sg() 2021-08-09 17:13:05 +02:00
kernel kprobes: treewide: Cleanup the error messages for kprobes 2023-02-22 12:57:00 +01:00
kvm ARM: 2021-09-07 13:40:51 -07:00
lantiq MIPS: lantiq: export clk_get_io() for lantiq_wdt.ko 2022-09-28 11:11:48 +02:00
lib MIPS: Fix build error due to PTR used in more places 2022-02-16 12:56:16 +01:00
loongson2ef MIPS: loongson2ef: don't build serial.o unconditionally 2021-08-05 10:58:21 +02:00
loongson32 MIPS: Loongson32: Fix PHY-mode being left unspecified 2022-09-28 11:11:48 +02:00
loongson64 MIPS: Loongson64: Add WARN_ON on kexec related kmalloc failed 2022-11-26 09:24:38 +01:00
math-emu MIPS: Use fallthrough for arch/mips 2020-05-07 11:55:47 +02:00
mm MIPS: tlbex: Explicitly compare _PAGE_NO_EXEC against 0 2022-08-25 11:40:46 +02:00
mti-malta - converted Pistachio platform to use MIPS generic kernel 2021-09-03 11:11:54 -07:00
n64 mips: Add N64 machine type 2021-01-22 11:40:00 +01:00
net bpf, mips: Validate conditional branch offsets 2021-09-15 21:38:16 +02:00
netlogic mips: netlogic: fix kernel-doc complaints in fmn-config.c 2021-07-22 11:48:06 +02:00
pci mips: Bulk conversion to generic_handle_domain_irq() 2021-08-12 11:39:40 +01:00
pic32 MIPS: pic32: treat port as signed integer 2022-12-02 17:41:02 +01:00
power mips: check for dsp presence only once before save/restore 2019-10-07 10:58:53 -07:00
ralink mips: ralink: mt7621: do not use kzalloc too early 2022-12-31 13:14:04 +01:00
rb532 MIPS: RB532: fix return value of __setup handler 2022-04-08 14:23:39 +02:00
sgi-ip22 bus: Make remove callback return void 2021-07-21 11:53:42 +02:00
sgi-ip27 MIPS: SGI-IP27: Fix platform-device leak in bridge_platform_create() 2022-10-26 12:34:37 +02:00
sgi-ip30 mips: Bulk conversion to generic_handle_domain_irq() 2021-08-12 11:39:40 +01:00
sgi-ip32 kernel.h: split out panic and oops helpers 2021-07-01 11:06:04 -07:00
sibyte MIPS: Remove empty prom_free_prom_memory functions 2021-01-07 17:11:33 +01:00
sni MIPS: sni: Fix the build 2021-11-25 09:48:28 +01:00
tools MIPS: tools: Fix resource leak in elf-entry.c 2020-05-24 09:29:48 +02:00
txx9 MIPS: Remove empty prom_free_prom_memory functions 2021-01-07 17:11:33 +01:00
vdso MIPS: Makefile: Replace -pg with CC_FLAGS_FTRACE 2021-04-21 13:44:35 +02:00
vr41xx MIPS: Remove repetitive increase irq_err_count 2022-06-29 09:03:24 +02:00
Kbuild MIPS: Fix "make clean" error due to recent changes 2020-05-13 13:20:22 +02:00
Kbuild.platforms MIPS: fix duplicated slashes for Platform file path 2021-11-18 19:17:14 +01:00
Kconfig mips: fix Kconfig reference to PHYS_ADDR_T_64BIT 2022-01-27 11:04:13 +01:00
Kconfig.debug tracing: Refactor TRACE_IRQFLAGS_SUPPORT in Kconfig 2021-08-16 11:37:21 -04:00
Makefile MIPS: fix *-pkg builds for loongson2ef platform 2021-11-18 19:17:14 +01:00
Makefile.postlink MIPS: fix indentation of the 'RELOCS' message 2020-01-20 15:37:30 -08:00