1 /* 2 * The per-CPU TranslationBlock jump cache. 3 * 4 * Copyright (c) 2003 Fabrice Bellard 5 * 6 * SPDX-License-Identifier: GPL-2.0-or-later 7 */ 8 9 #ifndef ACCEL_TCG_TB_JMP_CACHE_H 10 #define ACCEL_TCG_TB_JMP_CACHE_H 11 12 #include "qemu/rcu.h" 13 #include "exec/cpu-common.h" 14 15 #define TB_JMP_CACHE_BITS 12 16 #define TB_JMP_CACHE_SIZE (1 << TB_JMP_CACHE_BITS) 17 18 /* 19 * Invalidated in parallel; all accesses to 'tb' must be atomic. 20 * A valid entry is read/written by a single CPU, therefore there is 21 * no need for qatomic_rcu_read() and pc is always consistent with a 22 * non-NULL value of 'tb'. Strictly speaking pc is only needed for 23 * CF_PCREL, but it's used always for simplicity. 24 */ 25 typedef struct CPUJumpCache { 26 struct rcu_head rcu; 27 struct { 28 TranslationBlock *tb; 29 vaddr pc; 30 } array[TB_JMP_CACHE_SIZE]; 31 } CPUJumpCache; 32 33 #endif /* ACCEL_TCG_TB_JMP_CACHE_H */ 34