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b8d864f643
cpu_synchronize_state() is currently no-op for hvf but BIOS will hang in vAPIC option ROM when cpu_synchronize_state() is wired to hvf_cpu_synchronize_state(). cpu_synchronize_state() state is called from vapic_write() during option ROM initialization. It sets dirty flag on the cpu. macvm_set_rip() is then invoked to advance IP after the I/O write to vAPIC port. macvm_set_rip() only modifies VMCS, it doesn't change env->eip. Therefore on the next iteration of vCPU loop, vcpu_dirty flag is checked and hvf_put_registers() overwrites correct RIP in VMCS with the value of env->eip that points to the I/O write instruction. Execution of the CPU gets stuck on the instruction. The issue can be avoided if eip doesn't contain stale value when dirty flag is set on cpu. Cc: Cameron Esfahani <dirty@apple.com> Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com> Message-Id: <20200630102824.77604-2-r.bolshakov@yadro.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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