linux-stable.git/arch/openrisc/kernel, branch linux-6.9.y

openrisc: traps: Don't send signals to kernel mode threads

2024-05-30T07:44:21+00:00

[ Upstream commit c88cfb5cea5f8f9868ef02cc9ce9183a26dcf20f ]

OpenRISC exception handling sends signals to user processes on floating
point exceptions and trap instructions (for debugging) among others.
There is a bug where the trap handling logic may send signals to kernel
threads, we should not send these signals to kernel threads, if that
happens we treat it as an error.

This patch adds conditions to die if the kernel receives these
exceptions in kernel mode code.

Fixes: 27267655c531 ("openrisc: Support floating point user api")
Signed-off-by: Stafford Horne 
Signed-off-by: Sasha Levin

openrisc: Use do_kernel_power_off()

2024-05-30T07:44:21+00:00

[ Upstream commit c94195a34e09dacfe2feef03602c911e82f49994 ]

After commit 14c5678720bd ("power: reset: syscon-poweroff: Use
devm_register_sys_off_handler(POWER_OFF)") setting up of pm_power_off
was removed from the driver, this causes OpenRISC platforms using
syscon-poweroff to no longer shutdown.

The kernel now supports chained power-off handlers. Use
do_kernel_power_off() that invokes chained power-off handlers.  All
architectures have moved away from using pm_power_off except OpenRISC.

This patch migrates openrisc to use do_kernel_power_off() instead of the
legacy pm_power_off().

Fixes: 14c5678720bd ("power: reset: syscon-poweroff: Use devm_register_sys_off_handler(POWER_OFF)")
Signed-off-by: Stafford Horne 
Reviewed-by: Sebastian Reichel 
Signed-off-by: Sasha Levin

Merge tag 'for-linus' of https://github.com/openrisc/linux

2024-03-14T22:53:10+00:00

Pull OpenRISC updates from Stafford Horne:
 "Just a few cleanups and updates that were sent in:

   - Replace asm/fixmap.h with asm-generic version

   - Fix to move memblock setup up before it's used during init"

* tag 'for-linus' of https://github.com/openrisc/linux:
  openrisc: Use asm-generic's version of fix_to_virt() & virt_to_fix()
  openrisc: Call setup_memory() earlier in the init sequence

openrisc: Call setup_memory() earlier in the init sequence

2024-03-10T08:55:46+00:00

The unflatten_and_copy_device_tree() function contains a call to
memblock_alloc(). This means that memblock is allocating memory before
any of the reserved memory regions are set aside in the setup_memory()
function which calls early_init_fdt_scan_reserved_mem(). Therefore,
there is a possibility for memblock to allocate from any of the
reserved memory regions.

Hence, move the call to setup_memory() to be earlier in the init
sequence so that the reserved memory regions are set aside before any
allocations are done using memblock.

Signed-off-by: Oreoluwa Babatunde 
Signed-off-by: Stafford Horne

smp: Consolidate smp_prepare_boot_cpu()

2024-03-04T11:01:54+00:00

There is no point in having seven architectures implementing the same empty
stub.

Provide a weak function in the init code and remove the stubs.

This also allows to utilize the function on UP which is required to
sanitize the per CPU handling on X86 UP.

Signed-off-by: Thomas Gleixner 
Signed-off-by: Ingo Molnar 
Link: https://lore.kernel.org/r/20240304005104.567671691@linutronix.de

openriac: Remove unused nommu_dump_state function

2023-08-21T07:15:25+00:00

When compiling with W=1 enabling -Wmissing-prototypes the compiler
warns:

  arch/openrisc/kernel/traps.c:146:6: error: no previous prototype for 'nommu_dump_state' [-Werror=missing-prototypes]

This function is not used so remove it.

Reported-by: Arnd Bergmann 
Closes: https://lore.kernel.org/linux-kernel/20230810141947.1236730-17-arnd@kernel.org/
Signed-off-by: Stafford Horne

openrisc: Include cpu.h and switch_to.h for prototypes

2023-08-21T07:15:25+00:00

When compiling with W=1 enabling -Wmissing-prototypes the compiler
warns:

  arch/openrisc/kernel/process.c:100:6: error: no previous prototype for 'arch_cpu_idle' [-Werror=missing-prototypes]
  arch/openrisc/kernel/process.c:240:21: error: no previous prototype for '__switch_to' [-Werror=missing-prototypes]

Fix these by adding the approrpiate header files to process.c which
brings in the prototype definitions.

Reported-by: Arnd Bergmann 
Closes: https://lore.kernel.org/linux-kernel/20230810141947.1236730-17-arnd@kernel.org/
Signed-off-by: Stafford Horne

openrisc: Add prototype for die to bug.h

2023-08-21T07:15:25+00:00

When compiling with W=1 enabling -Wmissing-prototypes the compiler
warns:

  arch/openrisc/kernel/traps.c:221:17: sing-prototypesrror: no previous prototype for 'die' [-Werror=missing-prototypes]

Fix by adding the prototype to the appropriate header file and including
the header file in the appropriate C files.

Reported-by: Arnd Bergmann 
Closes: https://lore.kernel.org/linux-kernel/20230810141947.1236730-17-arnd@kernel.org/
Signed-off-by: Stafford Horne

openrisc: Add prototype for show_registers to processor.h

2023-08-21T07:15:18+00:00

When compiling with W=1 enabling -Wmissing-prototypes the compiler
warns:

  arch/openrisc/kernel/traps.c:67:6: error: no previous prototype for 'show_registers' [-Werror=missing-prototypes]

Fix by adding the prototype to the appropriate header file and including
the header file in the appropriate C files.

Reported-by: Arnd Bergmann 
Closes: https://lore.kernel.org/linux-kernel/20230810141947.1236730-17-arnd@kernel.org/
Signed-off-by: Stafford Horne

openrisc: Declare do_signal function as static

2023-08-21T07:12:11+00:00

When compiling with W=1 enabling -Wmissing-prototypes the compiler
warns:

  arch/openrisc/kernel/signal.c:227:5: error: no previous prototype for 'do_signal' [-Werror=missing-prototypes]

Fix this by declaring the function a static as it is not used outside of
the scope of this file.

Reported-by: Arnd Bergmann 
Closes: https://lore.kernel.org/linux-kernel/20230810141947.1236730-17-arnd@kernel.org/
Signed-off-by: Stafford Horne