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accel/tcg: Introduce TARGET_TB_PCREL

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Prepare for targets to be able to produce TBs that can
run in more than one virtual context.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-08-12 09:53:53 -07:00
parent fbf59aad17
commit 8ed558ec0c
6 changed files with 131 additions and 29 deletions
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16
accel/tcg/cpu-exec.c
View file

@ -186,7 +186,7 @@ static bool tb_lookup_cmp(const void *p, const void *d)
const TranslationBlock *tb = p;
const struct tb_desc *desc = d;
if (tb_pc(tb) == desc->pc &&
if ((TARGET_TB_PCREL || tb_pc(tb) == desc->pc) &&
tb->page_addr[0] == desc->page_addr0 &&
tb->cs_base == desc->cs_base &&
tb->flags == desc->flags &&
@ -237,7 +237,8 @@ static TranslationBlock *tb_htable_lookup(CPUState *cpu, target_ulong pc,
return NULL;
}
desc.page_addr0 = phys_pc;
h = tb_hash_func(phys_pc, pc, flags, cflags, *cpu->trace_dstate);
h = tb_hash_func(phys_pc, (TARGET_TB_PCREL ? 0 : pc),
flags, cflags, *cpu->trace_dstate);
return qht_lookup_custom(&tb_ctx.htable, &desc, h, tb_lookup_cmp);
}
@ -247,16 +248,18 @@ static inline TranslationBlock *tb_lookup(CPUState *cpu, target_ulong pc,
uint32_t flags, uint32_t cflags)
{
TranslationBlock *tb;
CPUJumpCache *jc;
uint32_t hash;
/* we should never be trying to look up an INVALID tb */
tcg_debug_assert(!(cflags & CF_INVALID));
hash = tb_jmp_cache_hash_func(pc);
tb = qatomic_rcu_read(&cpu->tb_jmp_cache->array[hash].tb);
jc = cpu->tb_jmp_cache;
tb = tb_jmp_cache_get_tb(jc, hash);
if (likely(tb &&
tb->pc == pc &&
tb_jmp_cache_get_pc(jc, hash, tb) == pc &&
tb->cs_base == cs_base &&
tb->flags == flags &&
tb->trace_vcpu_dstate == *cpu->trace_dstate &&
@ -267,7 +270,7 @@ static inline TranslationBlock *tb_lookup(CPUState *cpu, target_ulong pc,
if (tb == NULL) {
return NULL;
}
qatomic_set(&cpu->tb_jmp_cache->array[hash].tb, tb);
tb_jmp_cache_set(jc, hash, tb, pc);
return tb;
}
@ -453,6 +456,7 @@ cpu_tb_exec(CPUState *cpu, TranslationBlock *itb, int *tb_exit)
if (cc->tcg_ops->synchronize_from_tb) {
cc->tcg_ops->synchronize_from_tb(cpu, last_tb);
} else {
assert(!TARGET_TB_PCREL);
assert(cc->set_pc);
cc->set_pc(cpu, tb_pc(last_tb));
}
@ -1002,7 +1006,7 @@ int cpu_exec(CPUState *cpu)
* for the fast lookup
*/
h = tb_jmp_cache_hash_func(pc);
qatomic_set(&cpu->tb_jmp_cache->array[h].tb, tb);
tb_jmp_cache_set(cpu->tb_jmp_cache, h, tb, pc);
}
#ifndef CONFIG_USER_ONLY