wireguard-linux/arch/xtensa/kernel/coprocessor.S, branch jd/unified-crypt-queue

xtensa: move fast exception handlers close to vectors

2020-02-05T05:53:39Z

On XIP kernels it makes sense to have exception vectors and fast exception handlers together (in a fast memory). In addition, with MTD XIP support both vectors and fast exception handlers must be outside of the FLASH. Add section .exception.text and move fast exception handlers to it. Put it together with vectors when vectors are outside of the .text. Signed-off-by: Max Filippov

xtensa: drop unused function fast_coprocessor_double

2020-02-01T08:42:35Z

fast_coprocessor_double is not used since commit c658eac628aa ("[XTENSA] Add support for configurable registers and coprocessors"). Remove it. There should be no coprocessor exceptions generated in the exception handling paths while PS.EXCM is set. Signed-off-by: Max Filippov

xtensa: drop unneeded headers from coprocessor.S

2019-11-26T19:33:58Z

A bunch of irrelevant headers is included into coprocessor.S. Remove them and add necessary asm/regs.h. Signed-off-by: Max Filippov

xtensa: fix build for cores with coprocessors

2019-07-25T00:44:42Z

Assembly entry/return abstraction change didn't add asmmacro.h include statement to coprocessor.S, resulting in references to undefined macros abi_entry and abi_ret on cores that define XTENSA_HAVE_COPROCESSORS. Fix that by including asm/asmmacro.h from the coprocessor.S. Signed-off-by: Max Filippov

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

xtensa: simplify coprocessor.S

2018-12-04T22:08:23Z

Use addresses instead of offsets and drop unneeded offset -> address calculations. Don't generate any code for undefined coprocessors. 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: use call instead of callx in assembly code

2017-12-10T22:48:52Z

Now that xtensa assembly sources are compiled with -mlongcalls let the assembler and linker relax call instructions into l32r + callx where needed. This change makes the code cleaner and potentially a bit faster. Signed-off-by: Max Filippov

xtensa: drop unused fast_io_protect function

2017-05-01T13:58:31Z

fast_io_protect is not used anywhere, drop its definition. Signed-off-by: Max Filippov

xtensa: split uaccess.h into C and asm sides

2016-09-28T01:15:21Z

Signed-off-by: Al Viro