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| author | Paolo Bonzini <pbonzini@redhat.com> | 2015-08-18 06:32:02 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-09-09 15:34:53 +0200 |
| commit | b0a46fa796504c7334202877a68c857e49f7c96c (patch) | |
| tree | 9a3d2a9c186678ac2ba8a5461326b02ca184e48c /cpu-exec.c | |
| parent | f240eb6fdcf63a5600e15fb44c6960586459a97f (diff) | |
| download | focaccia-qemu-b0a46fa796504c7334202877a68c857e49f7c96c.tar.gz focaccia-qemu-b0a46fa796504c7334202877a68c857e49f7c96c.zip | |
tcg: assign cpu->current_tb in a simpler place
TCG has not been reading cpu->current_tb from signal handlers for years. The code that synchronized cpu_exec with the signal handler is not needed anymore. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'cpu-exec.c')
| -rw-r--r-- | cpu-exec.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/cpu-exec.c b/cpu-exec.c index 5153f1b632..567ae8bda1 100644 --- a/cpu-exec.c +++ b/cpu-exec.c @@ -493,18 +493,13 @@ int cpu_exec(CPUState *cpu) } have_tb_lock = false; spin_unlock(&tcg_ctx.tb_ctx.tb_lock); - - /* cpu_interrupt might be called while translating the - TB, but before it is linked into a potentially - infinite loop and becomes env->current_tb. Avoid - starting execution if there is a pending interrupt. */ - cpu->current_tb = tb; - barrier(); if (likely(!cpu->exit_request)) { trace_exec_tb(tb, tb->pc); tc_ptr = tb->tc_ptr; /* execute the generated code */ + cpu->current_tb = tb; next_tb = cpu_tb_exec(cpu, tc_ptr); + cpu->current_tb = NULL; switch (next_tb & TB_EXIT_MASK) { case TB_EXIT_REQUESTED: /* Something asked us to stop executing @@ -543,7 +538,6 @@ int cpu_exec(CPUState *cpu) break; } } - cpu->current_tb = NULL; /* Try to align the host and virtual clocks if the guest is in advance */ align_clocks(&sc, cpu); |