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 #define TB_JMP_CACHE_BITS 12 13 #define TB_JMP_CACHE_SIZE (1 << TB_JMP_CACHE_BITS) 14 15 /* 16 * Invalidated in parallel; all accesses to 'tb' must be atomic. 17 * A valid entry is read/written by a single CPU, therefore there is 18 * no need for qatomic_rcu_read() and pc is always consistent with a 19 * non-NULL value of 'tb'. Strictly speaking pc is only needed for 20 * CF_PCREL, but it's used always for simplicity. 21 */ 22 struct CPUJumpCache { 23 struct rcu_head rcu; 24 struct { 25 TranslationBlock *tb; 26 vaddr pc; 27 } array[TB_JMP_CACHE_SIZE]; 28 }; 29 30 #endif /* ACCEL_TCG_TB_JMP_CACHE_H */ 31