diff options
Diffstat (limited to 'cpus.c')
| -rw-r--r-- | cpus.c | 29 |
1 files changed, 16 insertions, 13 deletions
@@ -102,17 +102,12 @@ static bool all_cpu_threads_idle(void) /* Protected by TimersState seqlock */ -/* Compensate for varying guest execution speed. */ -static int64_t qemu_icount_bias; static int64_t vm_clock_warp_start; /* Conversion factor from emulated instructions to virtual clock ticks. */ static int icount_time_shift; /* Arbitrarily pick 1MIPS as the minimum allowable speed. */ #define MAX_ICOUNT_SHIFT 10 -/* Only written by TCG thread */ -static int64_t qemu_icount; - static QEMUTimer *icount_rt_timer; static QEMUTimer *icount_vm_timer; static QEMUTimer *icount_warp_timer; @@ -129,6 +124,11 @@ typedef struct TimersState { int64_t cpu_clock_offset; int32_t cpu_ticks_enabled; int64_t dummy; + + /* Compensate for varying guest execution speed. */ + int64_t qemu_icount_bias; + /* Only written by TCG thread */ + int64_t qemu_icount; } TimersState; static TimersState timers_state; @@ -139,14 +139,14 @@ static int64_t cpu_get_icount_locked(void) int64_t icount; CPUState *cpu = current_cpu; - icount = qemu_icount; + icount = timers_state.qemu_icount; if (cpu) { if (!cpu_can_do_io(cpu)) { fprintf(stderr, "Bad clock read\n"); } icount -= (cpu->icount_decr.u16.low + cpu->icount_extra); } - return qemu_icount_bias + (icount << icount_time_shift); + return timers_state.qemu_icount_bias + (icount << icount_time_shift); } int64_t cpu_get_icount(void) @@ -284,7 +284,8 @@ static void icount_adjust(void) icount_time_shift++; } last_delta = delta; - qemu_icount_bias = cur_icount - (qemu_icount << icount_time_shift); + timers_state.qemu_icount_bias = cur_icount + - (timers_state.qemu_icount << icount_time_shift); seqlock_write_unlock(&timers_state.vm_clock_seqlock); } @@ -333,7 +334,7 @@ static void icount_warp_rt(void *opaque) int64_t delta = cur_time - cur_icount; warp_delta = MIN(warp_delta, delta); } - qemu_icount_bias += warp_delta; + timers_state.qemu_icount_bias += warp_delta; } vm_clock_warp_start = -1; seqlock_write_unlock(&timers_state.vm_clock_seqlock); @@ -351,7 +352,7 @@ void qtest_clock_warp(int64_t dest) int64_t deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL); int64_t warp = qemu_soonest_timeout(dest - clock, deadline); seqlock_write_lock(&timers_state.vm_clock_seqlock); - qemu_icount_bias += warp; + timers_state.qemu_icount_bias += warp; seqlock_write_unlock(&timers_state.vm_clock_seqlock); qemu_clock_run_timers(QEMU_CLOCK_VIRTUAL); @@ -1250,7 +1251,8 @@ static int tcg_cpu_exec(CPUArchState *env) int64_t count; int64_t deadline; int decr; - qemu_icount -= (cpu->icount_decr.u16.low + cpu->icount_extra); + timers_state.qemu_icount -= (cpu->icount_decr.u16.low + + cpu->icount_extra); cpu->icount_decr.u16.low = 0; cpu->icount_extra = 0; deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL); @@ -1265,7 +1267,7 @@ static int tcg_cpu_exec(CPUArchState *env) } count = qemu_icount_round(deadline); - qemu_icount += count; + timers_state.qemu_icount += count; decr = (count > 0xffff) ? 0xffff : count; count -= decr; cpu->icount_decr.u16.low = decr; @@ -1278,7 +1280,8 @@ static int tcg_cpu_exec(CPUArchState *env) if (use_icount) { /* Fold pending instructions back into the instruction counter, and clear the interrupt flag. */ - qemu_icount -= (cpu->icount_decr.u16.low + cpu->icount_extra); + timers_state.qemu_icount -= (cpu->icount_decr.u16.low + + cpu->icount_extra); cpu->icount_decr.u32 = 0; cpu->icount_extra = 0; } |