linux-dev/arch/xtensa/lib, branch master

xtensa: enable KCSAN

2022-05-02T02:51:22Z

Prefix arch-specific barrier macros with '__' to make use of instrumented generic macros. Prefix arch-specific bitops with 'arch_' to make use of instrumented generic functions. Provide stubs for 64-bit atomics when building with KCSAN. Disable KCSAN instrumentation in arch/xtensa/boot. Signed-off-by: Max Filippov Acked-by: Marco Elver

xtensa: localize labels used in memmove

2022-05-02T02:51:20Z

Internal labels in the memmove implementation don't need to be visible, localize them by prefixing their names with '.L'. Signed-off-by: Max Filippov

xtensa: add helpers for division, remainder and shifts

2022-03-09T22:02:40Z

Don't rely on libgcc presence, build own versions of the helpers with correct ABI. Signed-off-by: Max Filippov

xtensa: don't use a12 in __xtensa_copy_user in call0 ABI

2021-10-19T05:19:34Z

a12 is callee-saved register in xtensa call0 ABI, so a function must not change it. The main unaligned copy loop of __xtensa_copy_user uses all low-numbered registers, so a register must be spilled to avoid using a12 as a loop counter. Signed-off-by: Max Filippov

xtensa: don't use a12 in strncpy_user

2021-10-19T05:19:34Z

a12 is callee-saved register in xtensa call0 ABI, so a function must not change it. a10 is not used in this function at all, use it instead of a12 to avoid saving/restoring it. Signed-off-by: Max Filippov

xtensa: propagate the calling conventions change down into csum_partial_copy_generic()

2020-08-20T19:45:21Z

turn the exception handlers into returning 0. Signed-off-by: Al Viro

xtensa: abstract 'entry' and 'retw' in assembly code

2019-07-08T17:04:48Z

Provide abi_entry, abi_entry_default, abi_ret and abi_ret_default macros that allocate aligned stack frame in windowed and call0 ABIs. Provide XTENSA_SPILL_STACK_RESERVE macro that specifies required stack frame size when register spilling is involved. Replace all uses of 'entry' and 'retw' with the above macros. This makes most of the xtensa assembly code ready for XEA3 and call0 ABI. Signed-off-by: Max Filippov

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30T18:26:32Z

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman

treewide: Add SPDX license identifier - Makefile/Kconfig

2019-05-21T08:50:46Z

Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman

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