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accel/tcg: Keep TranslationBlock headers local to TCG

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Only the TCG accelerator uses the TranslationBlock API.
Move the tb-context.h / tb-hash.h / tb-lookup.h from the
global namespace to the TCG one (in accel/tcg).

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210524170453.3791436-3-f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2021-05-24 19:04:53 +02:00 • committed by Richard Henderson
parent 824f4bac9f
commit e5ceadff47
8 changed files with 8 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

6
accel/tcg/cpu-exec.c
View file

@ -29,9 +29,6 @@
#include "qemu/compiler.h"
#include "qemu/timer.h"
#include "qemu/rcu.h"
#include "exec/tb-hash.h"
#include "exec/tb-lookup.h"
#include "exec/tb-context.h"
#include "exec/log.h"
#include "qemu/main-loop.h"
#if defined(TARGET_I386) && !defined(CONFIG_USER_ONLY)
@ -41,6 +38,9 @@
#include "exec/cpu-all.h"
#include "sysemu/cpu-timers.h"
#include "sysemu/replay.h"
#include "tb-hash.h"
#include "tb-lookup.h"
#include "tb-context.h"
#include "internal.h"
/* -icount align implementation. */

2
accel/tcg/cputlb.c
View file

@ -24,7 +24,6 @@
#include "exec/memory.h"
#include "exec/cpu_ldst.h"
#include "exec/cputlb.h"
#include "exec/tb-hash.h"
#include "exec/memory-internal.h"
#include "exec/ram_addr.h"
#include "tcg/tcg.h"
@ -36,6 +35,7 @@
#include "exec/translate-all.h"
#include "trace/trace-root.h"
#include "trace/mem.h"
#include "tb-hash.h"
#include "internal.h"
#ifdef CONFIG_PLUGIN
#include "qemu/plugin-memory.h"

41
accel/tcg/tb-context.h Normal file
View file

@ -0,0 +1,41 @@
/*
* Internal structs that QEMU exports to TCG
*
* Copyright (c) 2003 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef QEMU_TB_CONTEXT_H
#define QEMU_TB_CONTEXT_H
#include "qemu/thread.h"
#include "qemu/qht.h"
#define CODE_GEN_HTABLE_BITS 15
#define CODE_GEN_HTABLE_SIZE (1 << CODE_GEN_HTABLE_BITS)
typedef struct TBContext TBContext;
struct TBContext {
struct qht htable;
/* statistics */
unsigned tb_flush_count;
};
extern TBContext tb_ctx;
#endif

69
accel/tcg/tb-hash.h Normal file
View file

@ -0,0 +1,69 @@
/*
* internal execution defines for qemu
*
* Copyright (c) 2003 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef EXEC_TB_HASH_H
#define EXEC_TB_HASH_H
#include "exec/cpu-defs.h"
#include "exec/exec-all.h"
#include "qemu/xxhash.h"
#ifdef CONFIG_SOFTMMU
/* Only the bottom TB_JMP_PAGE_BITS of the jump cache hash bits vary for
addresses on the same page. The top bits are the same. This allows
TLB invalidation to quickly clear a subset of the hash table. */
#define TB_JMP_PAGE_BITS (TB_JMP_CACHE_BITS / 2)
#define TB_JMP_PAGE_SIZE (1 << TB_JMP_PAGE_BITS)
#define TB_JMP_ADDR_MASK (TB_JMP_PAGE_SIZE - 1)
#define TB_JMP_PAGE_MASK (TB_JMP_CACHE_SIZE - TB_JMP_PAGE_SIZE)
static inline unsigned int tb_jmp_cache_hash_page(target_ulong pc)
{
target_ulong tmp;
tmp = pc ^ (pc >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS));
return (tmp >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)) & TB_JMP_PAGE_MASK;
}
static inline unsigned int tb_jmp_cache_hash_func(target_ulong pc)
{
target_ulong tmp;
tmp = pc ^ (pc >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS));
return (((tmp >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)) & TB_JMP_PAGE_MASK)
| (tmp & TB_JMP_ADDR_MASK));
}
#else
/* In user-mode we can get better hashing because we do not have a TLB */
static inline unsigned int tb_jmp_cache_hash_func(target_ulong pc)
{
return (pc ^ (pc >> TB_JMP_CACHE_BITS)) & (TB_JMP_CACHE_SIZE - 1);
}
#endif /* CONFIG_SOFTMMU */
static inline
uint32_t tb_hash_func(tb_page_addr_t phys_pc, target_ulong pc, uint32_t flags,
uint32_t cf_mask, uint32_t trace_vcpu_dstate)
{
return qemu_xxhash7(phys_pc, pc, flags, cf_mask, trace_vcpu_dstate);
}
#endif

49
accel/tcg/tb-lookup.h Normal file
View file

@ -0,0 +1,49 @@
/*
* Copyright (C) 2017, Emilio G. Cota <cota@braap.org>
*
* License: GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef EXEC_TB_LOOKUP_H
#define EXEC_TB_LOOKUP_H
#ifdef NEED_CPU_H
#include "cpu.h"
#else
#include "exec/poison.h"
#endif
#include "exec/exec-all.h"
#include "tb-hash.h"
/* Might cause an exception, so have a longjmp destination ready */
static inline TranslationBlock *tb_lookup(CPUState *cpu, target_ulong pc,
target_ulong cs_base,
uint32_t flags, uint32_t cflags)
{
TranslationBlock *tb;
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[hash]);
if (likely(tb &&
tb->pc == pc &&
tb->cs_base == cs_base &&
tb->flags == flags &&
tb->trace_vcpu_dstate == *cpu->trace_dstate &&
tb_cflags(tb) == cflags)) {
return tb;
}
tb = tb_htable_lookup(cpu, pc, cs_base, flags, cflags);
if (tb == NULL) {
return NULL;
}
qatomic_set(&cpu->tb_jmp_cache[hash], tb);
return tb;
}
#endif /* EXEC_TB_LOOKUP_H */

2
accel/tcg/tcg-runtime.c
View file

@ -30,7 +30,7 @@
#include "disas/disas.h"
#include "exec/log.h"
#include "tcg/tcg.h"
#include "exec/tb-lookup.h"
#include "tb-lookup.h"
/* 32-bit helpers */

4
accel/tcg/translate-all.c
View file

@ -47,8 +47,6 @@
#endif
#include "exec/cputlb.h"
#include "exec/tb-hash.h"
#include "exec/tb-context.h"
#include "exec/translate-all.h"
#include "qemu/bitmap.h"
#include "qemu/error-report.h"
@ -61,6 +59,8 @@
#include "sysemu/tcg.h"
#include "qapi/error.h"
#include "hw/core/tcg-cpu-ops.h"
#include "tb-hash.h"
#include "tb-context.h"
#include "internal.h"
/* #define DEBUG_TB_INVALIDATE */