diff options
author | 2022-08-04 15:27:20 -0700 | |
---|---|---|
committer | 2022-08-04 15:27:20 -0700 | |
commit | 7df9075e232e09d99cf23b657b6cb04c9506e618 (patch) | |
tree | 2f1853fc2310fee78a91067315b78fdd733578d4 /arch/csky/include/asm/jump_label.h | |
parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/egt... (diff) | |
parent | csky: abiv1: Fixup compile error (diff) | |
download | linux-7df9075e232e09d99cf23b657b6cb04c9506e618.tar.gz linux-7df9075e232e09d99cf23b657b6cb04c9506e618.tar.bz2 linux-7df9075e232e09d99cf23b657b6cb04c9506e618.zip |
Merge tag 'csky-for-linus-6.0-rc1' of https://github.com/c-sky/csky-linux
Pull csky updates from Guo Ren:
- Add jump-label implementation
- Add qspinlock support
- Enable ARCH_INLINE_READ*/WRITE*/SPIN*
- Some fixups and a coding convention
* tag 'csky-for-linus-6.0-rc1' of https://github.com/c-sky/csky-linux:
csky: abiv1: Fixup compile error
csky: cmpxchg: Coding convention for BUILD_BUG()
csky: Enable ARCH_INLINE_READ*/WRITE*/SPIN*
csky: Add qspinlock support
csky: Add jump-label implementation
csky: Move HEAD_TEXT_SECTION out of __init_begin-end
csky: Correct position of _stext
csky: Use the bitmap API to allocate bitmaps
csky/kprobe: reclaim insn_slot on kprobe unregistration
Diffstat (limited to 'arch/csky/include/asm/jump_label.h')
-rw-r--r-- | arch/csky/include/asm/jump_label.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/csky/include/asm/jump_label.h b/arch/csky/include/asm/jump_label.h new file mode 100644 index 000000000000..d488ba6084bc --- /dev/null +++ b/arch/csky/include/asm/jump_label.h @@ -0,0 +1,47 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef __ASM_CSKY_JUMP_LABEL_H +#define __ASM_CSKY_JUMP_LABEL_H + +#ifndef __ASSEMBLY__ + +#include <linux/types.h> + +#define JUMP_LABEL_NOP_SIZE 4 + +static __always_inline bool arch_static_branch(struct static_key *key, + bool branch) +{ + asm_volatile_goto( + "1: nop32 \n" + " .pushsection __jump_table, \"aw\" \n" + " .align 2 \n" + " .long 1b - ., %l[label] - . \n" + " .long %0 - . \n" + " .popsection \n" + : : "i"(&((char *)key)[branch]) : : label); + + return false; +label: + return true; +} + +static __always_inline bool arch_static_branch_jump(struct static_key *key, + bool branch) +{ + asm_volatile_goto( + "1: bsr32 %l[label] \n" + " .pushsection __jump_table, \"aw\" \n" + " .align 2 \n" + " .long 1b - ., %l[label] - . \n" + " .long %0 - . \n" + " .popsection \n" + : : "i"(&((char *)key)[branch]) : : label); + + return false; +label: + return true; +} + +#endif /* __ASSEMBLY__ */ +#endif /* __ASM_CSKY_JUMP_LABEL_H */ |