• Paolo Bonzini's avatar
    KVM: x86: move LAPIC initialization after VMCS creation · 0b2e9904
    Paolo Bonzini authored
    The initial reset of the local APIC is performed before the VMCS has been
    created, but it tries to do a vmwrite:
    
     vmwrite error: reg 810 value 4a00 (err 18944)
     CPU: 54 PID: 38652 Comm: qemu-kvm Tainted: G        W I      4.16.0-0.rc2.git0.1.fc28.x86_64 #1
     Hardware name: Intel Corporation S2600CW/S2600CW, BIOS SE5C610.86B.01.01.0003.090520141303 09/05/2014
     Call Trace:
      vmx_set_rvi [kvm_intel]
      vmx_hwapic_irr_update [kvm_intel]
      kvm_lapic_reset [kvm]
      kvm_create_lapic [kvm]
      kvm_arch_vcpu_init [kvm]
      kvm_vcpu_init [kvm]
      vmx_create_vcpu [kvm_intel]
      kvm_vm_ioctl [kvm]
    
    Move it later, after the VMCS has been created.
    
    Fixes: 4191db26 ("KVM: x86: Update APICv on APIC reset")
    Cc: stable@vger.kernel.org
    Cc: Liran Alon <liran.alon@oracle.com>
    Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
    0b2e9904
lapic.c 65.1 KB