From 62217beb394e654bbd2bb87c533dadd2d8bf62c6 Mon Sep 17 00:00:00 2001 From: Helge Deller Date: Fri, 3 May 2019 23:51:00 +0200 Subject: parisc: Add static branch and JUMP_LABEL feature Signed-off-by: Helge Deller --- arch/parisc/include/asm/jump_label.h | 43 ++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 arch/parisc/include/asm/jump_label.h (limited to 'arch/parisc/include') diff --git a/arch/parisc/include/asm/jump_label.h b/arch/parisc/include/asm/jump_label.h new file mode 100644 index 000000000000..7efb1aa2f7f8 --- /dev/null +++ b/arch/parisc/include/asm/jump_label.h @@ -0,0 +1,43 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_PARISC_JUMP_LABEL_H +#define _ASM_PARISC_JUMP_LABEL_H + +#ifndef __ASSEMBLY__ + +#include +#include + +#define JUMP_LABEL_NOP_SIZE 4 + +static __always_inline bool arch_static_branch(struct static_key *key, bool branch) +{ + asm_volatile_goto("1:\n\t" + "nop\n\t" + ".pushsection __jump_table, \"aw\"\n\t" + ".word 1b - ., %l[l_yes] - .\n\t" + __stringify(ASM_ULONG_INSN) " %c0 - .\n\t" + ".popsection\n\t" + : : "i" (&((char *)key)[branch]) : : l_yes); + + return false; +l_yes: + return true; +} + +static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch) +{ + asm_volatile_goto("1:\n\t" + "b,n %l[l_yes]\n\t" + ".pushsection __jump_table, \"aw\"\n\t" + ".word 1b - ., %l[l_yes] - .\n\t" + __stringify(ASM_ULONG_INSN) " %c0 - .\n\t" + ".popsection\n\t" + : : "i" (&((char *)key)[branch]) : : l_yes); + + return false; +l_yes: + return true; +} + +#endif /* __ASSEMBLY__ */ +#endif -- cgit v1.2.3