kernel/arch/xtensa/lib, branch linux-5.1.y

xtensa: add support for KASAN

2017-12-17T06:37:12Z

Cover kernel addresses above 0x90000000 by the shadow map. Enable HAVE_ARCH_KASAN when MMU is enabled. Provide kasan_early_init that fills shadow map with writable copies of kasan_zero_page. Call kasan_early_init right after mmu initialization in the setup_arch. Provide kasan_init that allocates proper shadow map pages from the memblock and puts these pages into the shadow map for addresses from VMALLOC area to the end of KSEG. Call kasan_init right after memblock initialization. Don't use KASAN for the boot code, MMU and KASAN initialization and page fault handler. Make kernel stack size 4 times larger when KASAN is enabled to avoid stack overflows. GCC 7.3, 8 or newer is required to build the xtensa kernel with KASAN. Signed-off-by: Max Filippov

xtensa: clean up custom-controlled debug output

2017-12-17T06:37:08Z

Replace #ifdef'fed/commented out debug printk statements with pr_debug. Replace printk statements with pr_* equivalents. Signed-off-by: Max Filippov

xtensa: clean up functions in assembly code

2017-12-10T22:48:54Z

Use ENTRY and ENDPROC throughout arch/xtensa/lib assembly sources. Introduce asm/linkage.h and define xtensa-specific __ALIGN macro there. Signed-off-by: Max Filippov

xtensa: clean up word alignment macros in assembly code

2017-12-10T22:48:53Z

Remove duplicate definitions of ALIGN/src_b/__src_b and SSA8/ssa8/__ssa8 from assembly sources and put single definition into asm/asmmacro.h Signed-off-by: Max Filippov

xtensa: clean up fixups in assembly code

2017-12-10T22:48:53Z

Remove duplicate definitions of EX() and similar TRY/CATCH and SRC/DST macros from assembly sources and put single definition into asm/asmmacro.h Signed-off-by: Max Filippov

xtensa: get rid of zeroing, use RAW_COPY_USER

2017-03-28T22:24:07Z

Signed-off-by: Al Viro

xtensa: fixes for configs without loop option

2015-11-02T15:02:47Z

Build-time fixes: - make lbeg/lend/lcount save/restore conditional on kernel entry; - don't clear lcount in platform_restart functions unconditionally. Run-time fixes: - use correct end of range register in __endla paired with __loopt, not the unused temporary register. This fixes .bss zero-initialization. Update comments in asmmacro.h; - don't clobber a10 in the usercopy that leads to access to unmapped memory. Cc: Signed-off-by: Max Filippov

xtensa: clean up files to make them code-style compliant

2012-12-19T05:10:25Z

Remove heading and trailing spaces, trim trailing lines, and wrap lines that are longer than 80 characters. Signed-off-by: Chris Zankel

xtensa: provide proper assembler function boundaries with ENDPROC()

2012-12-19T05:10:20Z

Use ENDPROC() to mark the end of assembler functions. Signed-off-by: Chris Zankel

xtensa: fix memmove(), bcopy(), and memcpy().

2012-10-16T04:41:19Z

- fix memmove to correctly handle overlapping src and dst; - fix memcpy loop ending conditions from signed '<=' to '!='; - modify bcopy to call memmove; Signed-off-by: Max Filippov Signed-off-by: Chris Zankel