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So here it is, let's see what happens.

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Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream-replay' into staging

So here it is, let's see what happens.

# gpg: Signature made Fri 06 Nov 2015 09:30:34 GMT using RSA key ID 78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>"

* remotes/bonzini/tags/for-upstream-replay:
  replay: recording of the user input
  replay: command line options
  replay: replay blockers for devices
  replay: initialization and deinitialization
  replay: ptimer
  bottom halves: introduce bh call function
  replay: checkpoints
  icount: improve counting for record/replay
  replay: shutdown event
  replay: recording and replaying clock ticks
  replay: asynchronous events infrastructure
  replay: interrupts and exceptions
  cpu: replay instructions sequence
  cpu-exec: allow temporary disabling icount
  replay: introduce icount event
  replay: introduce mutex to protect the replay log
  replay: internal functions for replay log
  replay: global variables and function stubs

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2015-11-06 11:31:40 +00:00
commit 9319738080
30 changed files with 1803 additions and 58 deletions
Download patch file Download diff file Expand all files Collapse all files

55
cpu-exec.c
View file

@ -30,6 +30,7 @@
#if defined(TARGET_I386) && !defined(CONFIG_USER_ONLY)
#include "hw/i386/apic.h"
#endif
#include "sysemu/replay.h"
/* -icount align implementation. */
@ -184,7 +185,7 @@ static inline tcg_target_ulong cpu_tb_exec(CPUState *cpu, uint8_t *tb_ptr)
/* Execute the code without caching the generated code. An interpreter
could be used if available. */
static void cpu_exec_nocache(CPUState *cpu, int max_cycles,
TranslationBlock *orig_tb)
TranslationBlock *orig_tb, bool ignore_icount)
{
TranslationBlock *tb;
@ -194,7 +195,8 @@ static void cpu_exec_nocache(CPUState *cpu, int max_cycles,
max_cycles = CF_COUNT_MASK;
tb = tb_gen_code(cpu, orig_tb->pc, orig_tb->cs_base, orig_tb->flags,
max_cycles | CF_NOCACHE);
max_cycles | CF_NOCACHE
| (ignore_icount ? CF_IGNORE_ICOUNT : 0));
tb->orig_tb = tcg_ctx.tb_ctx.tb_invalidated_flag ? NULL : orig_tb;
cpu->current_tb = tb;
/* execute the generated code */
@ -345,21 +347,25 @@ int cpu_exec(CPUState *cpu)
uintptr_t next_tb;
SyncClocks sc;
/* replay_interrupt may need current_cpu */
current_cpu = cpu;
if (cpu->halted) {
#if defined(TARGET_I386) && !defined(CONFIG_USER_ONLY)
if (cpu->interrupt_request & CPU_INTERRUPT_POLL) {
if ((cpu->interrupt_request & CPU_INTERRUPT_POLL)
&& replay_interrupt()) {
apic_poll_irq(x86_cpu->apic_state);
cpu_reset_interrupt(cpu, CPU_INTERRUPT_POLL);
}
#endif
if (!cpu_has_work(cpu)) {
current_cpu = NULL;
return EXCP_HALTED;
}
cpu->halted = 0;
}
current_cpu = cpu;
atomic_mb_set(&tcg_current_cpu, cpu);
rcu_read_lock();
@ -401,10 +407,22 @@ int cpu_exec(CPUState *cpu)
cpu->exception_index = -1;
break;
#else
cc->do_interrupt(cpu);
cpu->exception_index = -1;
if (replay_exception()) {
cc->do_interrupt(cpu);
cpu->exception_index = -1;
} else if (!replay_has_interrupt()) {
/* give a chance to iothread in replay mode */
ret = EXCP_INTERRUPT;
break;
}
#endif
}
} else if (replay_has_exception()
&& cpu->icount_decr.u16.low + cpu->icount_extra == 0) {
/* try to cause an exception pending in the log */
cpu_exec_nocache(cpu, 1, tb_find_fast(cpu), true);
ret = -1;
break;
}
next_tb = 0; /* force lookup of first TB */
@ -420,30 +438,40 @@ int cpu_exec(CPUState *cpu)
cpu->exception_index = EXCP_DEBUG;
cpu_loop_exit(cpu);
}
if (interrupt_request & CPU_INTERRUPT_HALT) {
if (replay_mode == REPLAY_MODE_PLAY
&& !replay_has_interrupt()) {
/* Do nothing */
} else if (interrupt_request & CPU_INTERRUPT_HALT) {
replay_interrupt();
cpu->interrupt_request &= ~CPU_INTERRUPT_HALT;
cpu->halted = 1;
cpu->exception_index = EXCP_HLT;
cpu_loop_exit(cpu);
}
#if defined(TARGET_I386)
if (interrupt_request & CPU_INTERRUPT_INIT) {
else if (interrupt_request & CPU_INTERRUPT_INIT) {
replay_interrupt();
cpu_svm_check_intercept_param(env, SVM_EXIT_INIT, 0);
do_cpu_init(x86_cpu);
cpu->exception_index = EXCP_HALTED;
cpu_loop_exit(cpu);
}
#else
if (interrupt_request & CPU_INTERRUPT_RESET) {
else if (interrupt_request & CPU_INTERRUPT_RESET) {
replay_interrupt();
cpu_reset(cpu);
cpu_loop_exit(cpu);
}
#endif
/* The target hook has 3 exit conditions:
False when the interrupt isn't processed,
True when it is, and we should restart on a new TB,
and via longjmp via cpu_loop_exit. */
if (cc->cpu_exec_interrupt(cpu, interrupt_request)) {
next_tb = 0;
else {
replay_interrupt();
if (cc->cpu_exec_interrupt(cpu, interrupt_request)) {
next_tb = 0;
}
}
/* Don't use the cached interrupt_request value,
do_interrupt may have updated the EXITTB flag. */
@ -454,7 +482,8 @@ int cpu_exec(CPUState *cpu)
next_tb = 0;
}
}
if (unlikely(cpu->exit_request)) {
if (unlikely(cpu->exit_request
|| replay_has_interrupt())) {
cpu->exit_request = 0;
cpu->exception_index = EXCP_INTERRUPT;
cpu_loop_exit(cpu);
@ -519,7 +548,7 @@ int cpu_exec(CPUState *cpu)
if (insns_left > 0) {
/* Execute remaining instructions. */
tb = (TranslationBlock *)(next_tb & ~TB_EXIT_MASK);
cpu_exec_nocache(cpu, insns_left, tb);
cpu_exec_nocache(cpu, insns_left, tb, false);
align_clocks(&sc, cpu);
}
cpu->exception_index = EXCP_INTERRUPT;