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tcg: Remove CF_IGNORE_ICOUNT

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Now that we have curr_cflags, we can include CF_USE_ICOUNT
early and then remove it as necessary.

Backports commit 416986d3f97329655e30da7271a2d11c6d707b06 from qemu
This commit is contained in:
Richard Henderson 2018-03-13 15:27:48 -04:00 committed by Lioncash
parent f04beeea78
commit 35e551dc45
No known key found for this signature in database
GPG key ID: 4E3C3CC1031BA9C7
3 changed files with 19 additions and 20 deletions
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17
qemu/accel/tcg/cpu-exec.c
View file

@ -93,17 +93,18 @@ static void cpu_exec_nocache(CPUState *cpu, int max_cycles,
{
TranslationBlock *tb;
CPUArchState *env = (CPUArchState *)cpu->env_ptr;
uint32_t cflags = curr_cflags(cpu->uc) | CF_NOCACHE;
if (ignore_icount) {
cflags &= ~CF_USE_ICOUNT;
}
/* Should never happen.
We only end up here when an existing TB is too long. */
if (max_cycles > CF_COUNT_MASK) {
max_cycles = CF_COUNT_MASK;
}
cflags |= MIN(max_cycles, CF_COUNT_MASK);
tb = tb_gen_code(cpu, orig_tb->pc, orig_tb->cs_base, orig_tb->flags,
max_cycles | CF_NOCACHE
| 0
| curr_cflags(cpu->uc));
tb = tb_gen_code(cpu, orig_tb->pc, orig_tb->cs_base,
orig_tb->flags, cflags);
tb->orig_tb = orig_tb;
/* execute the generated code */
// Unicorn: commented out
@ -479,7 +480,7 @@ void cpu_exec_step_atomic(struct uc_struct *uc, CPUState *cpu)
TranslationBlock *tb;
target_ulong cs_base, pc;
uint32_t flags;
uint32_t cflags = 1 | CF_IGNORE_ICOUNT;
uint32_t cflags = 1;
uint32_t cf_mask = cflags & CF_HASH_MASK;
if (sigsetjmp(cpu->jmp_env, 0) == 0) {

5
qemu/accel/tcg/translate-all.c
View file

@ -1316,10 +1316,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
#endif
phys_pc = get_page_addr_code(env, pc);
/* UNICORN: Commented out
if (use_icount) {
cflags |= CF_USE_ICOUNT;
}*/
tb = tb_alloc(env->uc, pc);
if (unlikely(!tb)) {
buffer_overflow:

17
qemu/include/exec/exec-all.h
View file

@ -224,13 +224,12 @@ struct TranslationBlock {
size <= TARGET_PAGE_SIZE) */
uint16_t icount;
uint32_t cflags; /* compile flags */
#define CF_COUNT_MASK 0x7fff
#define CF_LAST_IO 0x8000 /* Last insn may be an IO access. */
#define CF_NOCACHE 0x10000 /* To be freed after execution */
#define CF_USE_ICOUNT 0x20000
#define CF_IGNORE_ICOUNT 0x40000 /* Do not generate icount code */
#define CF_INVALID 0x80000 /* TB is stale. Setters must acquire tb_lock */
#define CF_PARALLEL 0x100000 /* Generate code for a parallel context */
#define CF_COUNT_MASK 0x00007fff
#define CF_LAST_IO 0x00008000 /* Last insn may be an IO access. */
#define CF_NOCACHE 0x00010000 /* To be freed after execution */
#define CF_USE_ICOUNT 0x00020000
#define CF_INVALID 0x00040000 /* TB is stale. Setters need tb_lock */
#define CF_PARALLEL 0x00080000 /* Generate code for a parallel context */
/* cflags' mask for hashing/comparison */
#define CF_HASH_MASK \
(CF_COUNT_MASK | CF_LAST_IO | CF_USE_ICOUNT | CF_PARALLEL)
@ -283,7 +282,9 @@ static inline uint32_t tb_cflags(const TranslationBlock *tb)
/* current cflags for hashing/comparison */
static inline uint32_t curr_cflags(struct uc_struct *uc)
{
return uc->parallel_cpus ? CF_PARALLEL : 0;
return (uc->parallel_cpus ? CF_PARALLEL : 0);
// Unicorn: commented out
// | (use_icount ? CF_USE_ICOUNT : 0);
}
void tb_free(struct uc_struct *uc, TranslationBlock *tb);