linux-stable.git/arch/mips, branch v5.17.2

mips: Enable KCSAN - take 2

2022-04-08T11:58:59+00:00

commit d1ca45f93c3f95d1590d60b012cf8fcf6db633ee upstream.

Replaces KASAN_SANITIZE with KCSAN_SANITIZE in
boot/compressed/Makefile.

Fixes: e0a8b93efa23 mips: Enable KCSAN
Signed-off-by: Nemanja Rakovic 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Greg Kroah-Hartman

MIPS: crypto: Fix CRC32 code

2022-04-08T11:58:51+00:00

commit 41022eff9c2d21e658c7a6fcd31005bf514d28b7 upstream.

Commit 67512a8cf5a7 ("MIPS: Avoid macro redefinitions") changed how the
MIPS register macros were defined, in order to allow the code to compile
under LLVM/Clang.

The MIPS CRC32 code however wasn't updated accordingly, causing a build
bug when using a MIPS32r6 toolchain without CRC support.

Update the CRC32 code to use the macros correctly, to fix the build
failures.

Fixes: 67512a8cf5a7 ("MIPS: Avoid macro redefinitions")
Cc: 
Signed-off-by: Paul Cercueil 
Reported-by: kernel test robot 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Greg Kroah-Hartman

MIPS: pgalloc: fix memory leak caused by pgd_free()

2022-04-08T11:58:17+00:00

[ Upstream commit 2bc5bab9a763d520937e4f3fe8df51c6a1eceb97 ]

pgd page is freed by generic implementation pgd_free() since commit
f9cb654cb550 ("asm-generic: pgalloc: provide generic pgd_free()"),
however, there are scenarios that the system uses more than one page as
the pgd table, in such cases the generic implementation pgd_free() won't
be applicable anymore. For example, when PAGE_SIZE_4KB is enabled and
MIPS_VA_BITS_48 is not enabled in a 64bit system, the macro "PGD_ORDER"
will be set as "1", which will cause allocating two pages as the pgd
table. Well, at the same time, the generic implementation pgd_free()
just free one pgd page, which will result in the memory leak.

The memory leak can be easily detected by executing shell command:
"while true; do ls > /dev/null; grep MemFree /proc/meminfo; done"

Fixes: f9cb654cb550 ("asm-generic: pgalloc: provide generic pgd_free()")
Signed-off-by: Yaliang Wang 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Sasha Levin

MIPS: RB532: fix return value of __setup handler

2022-04-08T11:58:17+00:00

[ Upstream commit 8755d57ba1ff910666572fab9e32890e8cc6ed3b ]

__setup() handlers should return 1 to obsolete_checksetup() in
init/main.c to indicate that the boot option has been handled.
A return of 0 causes the boot option/value to be listed as an Unknown
kernel parameter and added to init's (limited) argument or environment
strings. Also, error return codes don't mean anything to
obsolete_checksetup() -- only non-zero (usually 1) or zero.
So return 1 from setup_kmac().

Fixes: 9e21c7e40b7e ("MIPS: RB532: Replace parse_mac_addr() with mac_pton().")
Fixes: 73b4390fb234 ("[MIPS] Routerboard 532: Support for base system")
Signed-off-by: Randy Dunlap 
From: Igor Zhbanov 
Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru
Cc: Thomas Bogendoerfer 
Cc: linux-mips@vger.kernel.org
Cc: "David S. Miller" 
Cc: Jakub Kicinski 
Cc: Phil Sutter 
Cc: Florian Fainelli 
Cc: Ralf Baechle 
Cc: Daniel Walter 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Sasha Levin

MIPS: Sanitise Cavium switch cases in TLB handler synthesizers

2022-04-08T11:58:16+00:00

[ Upstream commit 6ddcba9d480b6bcced4223a729794dfa6becb7eb ]

It makes no sense to fall through to `break'.  Therefore reorder the
switch statements so as to have the Cavium cases first, followed by the
default case, which improves readability and pacifies code analysis
tools.  No change in semantics, assembly produced is exactly the same.

Reported-by: kernel test robot 
Signed-off-by: Maciej W. Rozycki 
Fixes: bc431d2153cc ("MIPS: Fix fall-through warnings for Clang")
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Sasha Levin

mips: DEC: honor CONFIG_MIPS_FP_SUPPORT=n

2022-04-08T11:58:16+00:00

[ Upstream commit 97bf0395c226907e1a9b908511a35192bf1e09bb ]

Include the DECstation interrupt handler in opting out of
FPU support.

Fixes a linker error:

mips-linux-ld: arch/mips/dec/int-handler.o: in function `fpu':
(.text+0x148): undefined reference to `handle_fpe_int'

Fixes: 183b40f992c8 ("MIPS: Allow FP support to be disabled")
Signed-off-by: Randy Dunlap 
Reported-by: kernel test robot 
Cc: Paul Burton 
Cc: Thomas Bogendoerfer 
Cc: Maciej W. Rozycki 
Cc: linux-mips@vger.kernel.org
Acked-by: Maciej W. Rozycki 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Sasha Levin

mips: Enable KCSAN

2022-04-08T11:58:10+00:00

[ Upstream commit e0a8b93efa2382d370be44bf289157de7e5dacb4 ]

This patch enables KCSAN for the 64-bit version. Updated rules
for the incompatible compilation units (vdso, boot/compressed).

Signed-off-by: Nemanja Rakovic 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Sasha Levin

mips: Always permit to build u-boot images

2022-04-08T11:57:29+00:00

commit 34275ac292ae141ebc1296b72f005f71b25998a7 upstream.

The platforms where the kernel should be loaded above 0x8000.0000 do not
support loading u-boot images, that doesn't mean that we shouldn't be
able to generate them.

Additionally, since commit 79876cc1d7b8 ("MIPS: new Kconfig option
ZBOOT_LOAD_ADDRESS"), the $(zload-y) variable was no longer hardcoded,
which made it impossible to use the uzImage.bin target.

Fixes: 79876cc1d7b8 ("MIPS: new Kconfig option ZBOOT_LOAD_ADDRESS")
Cc: 
Signed-off-by: Paul Cercueil 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Greg Kroah-Hartman

DEC: Limit PMAX memory probing to R3k systems

2022-04-08T11:57:28+00:00

commit 244eae91a94c6dab82b3232967d10eeb9dfa21c6 upstream.

Recent tightening of the opcode table in binutils so as to consistently
disallow the assembly or disassembly of CP0 instructions not supported
by the processor architecture chosen has caused a regression like below:

arch/mips/dec/prom/locore.S: Assembler messages:
arch/mips/dec/prom/locore.S:29: Error: opcode not supported on this processor: r4600 (mips3) `rfe'

in a piece of code used to probe for memory with PMAX DECstation models,
which have non-REX firmware.  Those computers always have an R2000 CPU
and consequently the exception handler used in memory probing uses the
RFE instruction, which those processors use.

While adding 64-bit support this code was correctly excluded for 64-bit
configurations, however it should have also been excluded for irrelevant
32-bit configurations.  Do this now then, and only enable PMAX memory
probing for R3k systems.

Reported-by: Jan-Benedict Glaw 
Reported-by: Sudip Mukherjee 
Signed-off-by: Maciej W. Rozycki 
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable@vger.kernel.org # v2.6.12+
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Greg Kroah-Hartman

MIPS: ralink: mt7621: use bitwise NOT instead of logical

2022-03-01T09:08:45+00:00

It was the intention to reverse the bits, not make them all zero by
using logical NOT operator.

Fixes: cc19db8b312a ("MIPS: ralink: mt7621: do memory detection on KSEG1")
Suggested-by: Chuanhong Guo 
Signed-off-by: Ilya Lipnitskiy 
Reviewed-by: Sergio Paracuellos 
Signed-off-by: Thomas Bogendoerfer