jcs.org
qemu with hax to log dma reads & writes
jcs.org/2018/11/12/vfio
1/*
2 * Copyright (C) 2017, Emilio G. Cota <cota@braap.org>
3 *
4 * License: GNU GPL, version 2 or later.
5 * See the COPYING file in the top-level directory.
6 */
7#ifndef EXEC_TB_LOOKUP_H
8#define EXEC_TB_LOOKUP_H
9
10#ifdef NEED_CPU_H
11#include "cpu.h"
12#else
13#include "exec/poison.h"
14#endif
15
16#include "exec/exec-all.h"
17#include "exec/tb-hash.h"
18
19/* Might cause an exception, so have a longjmp destination ready */
20static inline TranslationBlock *
21tb_lookup__cpu_state(CPUState *cpu, target_ulong *pc, target_ulong *cs_base,
22 uint32_t *flags, uint32_t cf_mask)
23{
24 CPUArchState *env = (CPUArchState *)cpu->env_ptr;
25 TranslationBlock *tb;
26 uint32_t hash;
27
28 cpu_get_tb_cpu_state(env, pc, cs_base, flags);
29 hash = tb_jmp_cache_hash_func(*pc);
30 tb = atomic_rcu_read(&cpu->tb_jmp_cache[hash]);
31
32 cf_mask &= ~CF_CLUSTER_MASK;
33 cf_mask |= cpu->cluster_index << CF_CLUSTER_SHIFT;
34
35 if (likely(tb &&
36 tb->pc == *pc &&
37 tb->cs_base == *cs_base &&
38 tb->flags == *flags &&
39 tb->trace_vcpu_dstate == *cpu->trace_dstate &&
40 (tb_cflags(tb) & (CF_HASH_MASK | CF_INVALID)) == cf_mask)) {
41 return tb;
42 }
43 tb = tb_htable_lookup(cpu, *pc, *cs_base, *flags, cf_mask);
44 if (tb == NULL) {
45 return NULL;
46 }
47 atomic_set(&cpu->tb_jmp_cache[hash], tb);
48 return tb;
49}
50
51#endif /* EXEC_TB_LOOKUP_H */