linux.git/arch/xtensa/kernel, branch v6.6.131

arch: Add the macro COMPILE_OFFSETS to all the asm-offsets.c

2025-11-02T13:14:41+00:00

[ Upstream commit 35561bab768977c9e05f1f1a9bc00134c85f3e28 ]

The include/generated/asm-offsets.h is generated in Kbuild during
compiling from arch/SRCARCH/kernel/asm-offsets.c. When we want to
generate another similar offset header file, circular dependency can
happen.

For example, we want to generate a offset file include/generated/test.h,
which is included in include/sched/sched.h. If we generate asm-offsets.h
first, it will fail, as include/sched/sched.h is included in asm-offsets.c
and include/generated/test.h doesn't exist; If we generate test.h first,
it can't success neither, as include/generated/asm-offsets.h is included
by it.

In x86_64, the macro COMPILE_OFFSETS is used to avoid such circular
dependency. We can generate asm-offsets.h first, and if the
COMPILE_OFFSETS is defined, we don't include the "generated/test.h".

And we define the macro COMPILE_OFFSETS for all the asm-offsets.c for this
purpose.

Signed-off-by: Menglong Dong 
Signed-off-by: Peter Zijlstra (Intel) 
Signed-off-by: Sasha Levin

of/fdt: add dt_phys arg to early_init_dt_scan and early_init_dt_verify

2024-12-09T09:31:56+00:00

[ Upstream commit b2473a359763e27567993e7d8f37de82f57a0829 ]

 __pa() is only intended to be used for linear map addresses and using
it for initial_boot_params which is in fixmap for arm64 will give an
incorrect value. Hence save the physical address when it is known at
boot time when calling early_init_dt_scan for arm64 and use it at kexec
time instead of converting the virtual address using __pa().

Note that arm64 doesn't need the FDT region reserved in the DT as the
kernel explicitly reserves the passed in FDT. Therefore, only a debug
warning is fixed with this change.

Reported-by: Breno Leitao 
Suggested-by: Mark Rutland 
Signed-off-by: Usama Arif 
Fixes: ac10be5cdbfa ("arm64: Use common of_kexec_alloc_and_setup_fdt()")
Link: https://lore.kernel.org/r/20241023171426.452688-1-usamaarif642@gmail.com
Signed-off-by: Rob Herring (Arm) 
Signed-off-by: Sasha Levin

xtensa: fix MAKE_PC_FROM_RA second argument

2024-05-17T10:02:32+00:00

commit 0e60f0b75884677fb9f4f2ad40d52b43451564d5 upstream.

Xtensa has two-argument MAKE_PC_FROM_RA macro to convert a0 to an actual
return address because when windowed ABI is used call{,x}{4,8,12}
opcodes stuff encoded window size into the top 2 bits of the register
that becomes a return address in the called function. Second argument of
that macro is supposed to be an address having these 2 topmost bits set
correctly, but the comment suggested that that could be the stack
address. However the stack doesn't have to be in the same 1GByte region
as the code, especially in noMMU XIP configurations.

Fix the comment and use either _text or regs->pc as the second argument
for the MAKE_PC_FROM_RA macro.

Cc: stable@vger.kernel.org
Signed-off-by: Max Filippov 
Signed-off-by: Greg Kroah-Hartman

xtensa: hw_breakpoint: include header for missing prototype

2023-09-20T12:03:21+00:00

Add the prototype for restore_dbreak() to  and use
that header in hw_breakpoint.c to prevent a build warning:

arch/xtensa/kernel/hw_breakpoint.c:263:6: warning: no previous prototype for 'restore_dbreak' [-Wmissing-prototypes]
  263 | void restore_dbreak(void)

Signed-off-by: Randy Dunlap 
Cc: Chris Zankel 
Cc: Max Filippov 
Message-Id: <20230920052139.10570-12-rdunlap@infradead.org>
Signed-off-by: Max Filippov

xtensa: smp: add headers for missing function prototypes

2023-09-20T12:03:20+00:00

Use  to provide the prototype for secondary_start_kernel().
Use  to provide the prototype for
setup_profiling_timer().

arch/xtensa/kernel/smp.c:119:6: warning: no previous prototype for 'secondary_start_kernel' [-Wmissing-prototypes]
  119 | void secondary_start_kernel(void)
arch/xtensa/kernel/smp.c:461:5: warning: no previous prototype for 'setup_profiling_timer' [-Wmissing-prototypes]
  461 | int setup_profiling_timer(unsigned int multiplier)

Signed-off-by: Randy Dunlap 
Cc: Chris Zankel 
Cc: Max Filippov 
Message-Id: <20230920052139.10570-11-rdunlap@infradead.org>
Signed-off-by: Max Filippov

xtensa: traps: add for function prototype

2023-09-20T12:03:20+00:00

Use  to provide the prototype for trap_init(), to prevent
a build warning:

arch/xtensa/kernel/traps.c:484:13: warning: no previous prototype for 'trap_init' [-Wmissing-prototypes]
  484 | void __init trap_init(void)

Signed-off-by: Randy Dunlap 
Cc: Chris Zankel 
Cc: Max Filippov 
Message-Id: <20230920052139.10570-9-rdunlap@infradead.org>
Signed-off-by: Max Filippov

xtensa: stacktrace: include for prototype

2023-09-20T12:03:20+00:00

Use  to prevent a build warning:

arch/xtensa/kernel/stacktrace.c:263:15: warning: no previous prototype for 'return_address' [-Wmissing-prototypes]
  263 | unsigned long return_address(unsigned level)

Signed-off-by: Randy Dunlap 
Cc: Chris Zankel 
Cc: Max Filippov 
Message-Id: <20230920052139.10570-8-rdunlap@infradead.org>
Signed-off-by: Max Filippov

xtensa: signal: include headers for function prototypes

2023-09-20T12:03:19+00:00

Add  to satisfy the xtensa_rt_sigreturn() prototype
warning.
Add  to satisfy the do_notify_resume() prototype
warning.

arch/xtensa/kernel/signal.c:246:17: warning: no previous prototype for 'xtensa_rt_sigreturn' [-Wmissing-prototypes]
arch/xtensa/kernel/signal.c:525:6: warning: no previous prototype for 'do_notify_resume' [-Wmissing-prototypes]
  525 | void do_notify_resume(struct pt_regs *regs)

Signed-off-by: Randy Dunlap 
Cc: Chris Zankel 
Cc: Max Filippov 
Message-Id: <20230920052139.10570-7-rdunlap@infradead.org>
Signed-off-by: Max Filippov

xtensa: ptrace: add prototypes to

2023-09-20T12:03:19+00:00

Add prototype for do_syscall_trace_enter() to asm/ptrace.h.
Move prototype for do_syscall_trace_leave() there to be consistent.

Fixes a build warning:

arch/xtensa/kernel/ptrace.c:545:5: warning: no previous prototype for 'do_syscall_trace_enter' [-Wmissing-prototypes]
  545 | int do_syscall_trace_enter(struct pt_regs *regs)

Signed-off-by: Randy Dunlap 
Cc: Chris Zankel 
Cc: Max Filippov 
Message-Id: <20230920052139.10570-5-rdunlap@infradead.org>
Signed-off-by: Max Filippov

xtensa: irq: include

2023-09-20T12:03:18+00:00

Use  to provide the function prototype for do_IRQ()
to prevent a build warning:

arch/xtensa/kernel/irq.c:34:17: warning: no previous prototype for 'do_IRQ' [-Wmissing-prototypes]
   34 | asmlinkage void do_IRQ(int hwirq, struct pt_regs *regs)

Signed-off-by: Randy Dunlap 
Cc: Chris Zankel 
Cc: Max Filippov 
Message-Id: <20230920052139.10570-4-rdunlap@infradead.org>
Signed-off-by: Max Filippov