cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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jump_label.h (1036B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _ASM_SPARC_JUMP_LABEL_H
      3#define _ASM_SPARC_JUMP_LABEL_H
      4
      5#ifndef __ASSEMBLY__
      6
      7#include <linux/types.h>
      8
      9#define JUMP_LABEL_NOP_SIZE 4
     10
     11static __always_inline bool arch_static_branch(struct static_key *key, bool branch)
     12{
     13	asm_volatile_goto("1:\n\t"
     14		 "nop\n\t"
     15		 "nop\n\t"
     16		 ".pushsection __jump_table,  \"aw\"\n\t"
     17		 ".align 4\n\t"
     18		 ".word 1b, %l[l_yes], %c0\n\t"
     19		 ".popsection \n\t"
     20		 : :  "i" (&((char *)key)[branch]) : : l_yes);
     21
     22	return false;
     23l_yes:
     24	return true;
     25}
     26
     27static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch)
     28{
     29	asm_volatile_goto("1:\n\t"
     30		 "b %l[l_yes]\n\t"
     31		 "nop\n\t"
     32		 ".pushsection __jump_table,  \"aw\"\n\t"
     33		 ".align 4\n\t"
     34		 ".word 1b, %l[l_yes], %c0\n\t"
     35		 ".popsection \n\t"
     36		 : :  "i" (&((char *)key)[branch]) : : l_yes);
     37
     38	return false;
     39l_yes:
     40	return true;
     41}
     42
     43typedef u32 jump_label_t;
     44
     45struct jump_entry {
     46	jump_label_t code;
     47	jump_label_t target;
     48	jump_label_t key;
     49};
     50
     51#endif  /* __ASSEMBLY__ */
     52#endif