diff options
Diffstat (limited to 'include/qom/cpu.h')
| -rw-r--r-- | include/qom/cpu.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/qom/cpu.h b/include/qom/cpu.h index 20aabc9cb3..39712ab7cb 100644 --- a/include/qom/cpu.h +++ b/include/qom/cpu.h @@ -231,7 +231,9 @@ struct kvm_run; * @icount_decr: Number of cycles left, with interrupt flag in high bit. * This allows a single read-compare-cbranch-write sequence to test * for both decrementer underflow and exceptions. - * @can_do_io: Nonzero if memory-mapped IO is safe. + * @can_do_io: Nonzero if memory-mapped IO is safe. Deterministic execution + * requires that IO only be performed on the last instruction of a TB + * so that interrupts take effect immediately. * @env_ptr: Pointer to subclass-specific CPUArchState field. * @current_tb: Currently executing TB. * @gdb_regs: Additional GDB registers. |