kernel/arch/xtensa/include/asm/coprocessor.h, branch linux-rolling-stable

xtensa: Replace ASSEMBLY with ASSEMBLER in non-uapi headers

2025-06-06T08:03:35Z

While the GCC and Clang compilers already define __ASSEMBLER__ automatically when compiling assembly code, __ASSEMBLY__ is a macro that only gets defined by the Makefiles in the kernel. This can be very confusing when switching between userspace and kernelspace coding, or when dealing with uapi headers that rather should use __ASSEMBLER__ instead. So let's standardize on the __ASSEMBLER__ macro that is provided by the compilers now. This is a completely mechanical patch (done with a simple "sed -i" statement). Cc: Chris Zankel Cc: Max Filippov Signed-off-by: Thomas Huth Message-Id: <20250314071013.1575167-40-thuth@redhat.com> Signed-off-by: Max Filippov

xtensa: support coprocessors on SMP

2022-05-02T02:51:23Z

Current coprocessor support on xtensa only works correctly on uniprocessor configurations. Make it work on SMP too and keep it lazy. Make coprocessor_owner array per-CPU and move it to struct exc_table for easy access from the fast_coprocessor exception handler. Allow task to have live coprocessors only on single CPU, record this CPU number in the struct thread_info::cp_owner_cpu. Change struct thread_info::cpenable meaning to be 'coprocessors live on cp_owner_cpu'. Introduce C-level coprocessor exception handler that flushes and releases live coprocessors of the task taking 'coprocessor disabled' exception and call it from the fast_coprocessor handler when the task has live coprocessors on other CPU. Make coprocessor_flush_all and coprocessor_release_all work correctly when called from any CPU by sending IPI to the cp_owner_cpu. Add function coprocessor_flush_release_all to do flush followed by release atomically. Add function local_coprocessors_flush_release_all to flush and release all coprocessors on the local CPU and use it to flush coprocessor contexts from the CPU that goes offline. Signed-off-by: Max Filippov

xtensa: clean up declarations in coprocessor.h

2022-05-02T02:51:22Z

Drop 'extern' from all function declarations. Add parameter names in declarations. Signed-off-by: Max Filippov

xtensa: replace variant/core.h with asm/core.h

2019-05-07T00:48:55Z

Introduce the header arch/xtensa/include/asm/core.h that provides definitions for XCHAL macros missing in older xtensa releases. Use this header instead of variant/core.h Signed-off-by: Max Filippov

xtensa: clean up WSR/RSR/get_sr/set_sr

2018-12-04T22:08:11Z

WSR and RSR are too generic and collide with other macro definitions in the kernel causing warnings in allmodconfig builds. Drop WSR and RSR macros and WSR_* and RSR_* variants. Change get_sr and set_sr to xtensa_get_sr and xtensa_set_sr. Fix up users. Signed-off-by: Max Filippov

xtensa: drop unused coprocessor helper functions

2018-12-03T09:39:23Z

coprocessor_save, coprocessor_load and coprocessor_restore are neither used nor exported for use by modules. Drop them. Signed-off-by: Max Filippov

xtensa: reorganize SR referencing

2012-10-16T04:48:08Z

- reference SRs by names where possible, not by numbers; - get rid of __stringify around SR names where possible; - remove unneeded SR names from asm/regs.h; - add SREG_ prefix to remaining SR names; Signed-off-by: Max Filippov Signed-off-by: Chris Zankel

xtensa: Add missing include in coprocessor.h

2010-05-03T08:06:43Z

Coprocessor.h depends on variant settings. Signed-off-by: Chris Zankel

xtensa: move headers files to arch/xtensa/include

2008-11-06T18:25:09Z

Move all header files for xtensa to arch/xtensa/include and platform and variant header files to the appropriate arch/xtensa/platforms/ and arch/xtensa/variants/ directories. Moving the files gets also rid of all uses of symlinks in the Makefile. This has been completed already for the majority of the architectures and xtensa is one out of six missing. Signed-off-by: Sam Ravnborg Signed-off-by: Chris Zankel