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ddd31732a7
The sequence of instructions exposes an issue: sti hlt Interrupts cannot be delivered to hvf after hlt instruction cpu because HF_INHIBIT_IRQ_MASK is set just before hlt is handled and never reset after moving instruction pointer beyond hlt. So, after hvf_vcpu_exec() returns, CPU thread gets locked up forever in qemu_wait_io_event() (cpu_thread_is_idle() evaluates inhibition flag and considers the CPU idle if the flag is set). Cc: Cameron Esfahani <dirty@apple.com> Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com> Message-Id: <20200328174411.51491-1-r.bolshakov@yadro.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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