https://bugzilla.kernel.org/show_bug.cgi?id=65561 --- Comment #7 from Paolo Bonzini <bonzini@xxxxxxx> --- Hi Jidong, no this is not fixed yet. Basically OUT instructions are emulated by KVM, and support for single-stepping and breakpoints in the emulator is quite minimal. 3.12 added some support but OUTs and writes to memory are still broken: commit 0912c9771e9902f752e890e93af495cc06a786ac Author: Paolo Bonzini <pbonzini@xxxxxxxxxx> Date: Tue Aug 27 15:41:43 2013 +0200 KVM: x86: add comments where MMIO does not return to the emulator Support for single-step in the emulator (new in 3.12) does not work for MMIO or PIO writes, because they are completed without returning to the emulator. This is not worse than what we had in 3.11; still, add comments so that the issue is not forgotten. Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> Signed-off-by: Gleb Natapov <gleb@xxxxxxxxxx> -- You are receiving this mail because: You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
