github.com/google/syzkaller@v0.0.0-20251211124644-a066d2bc4b02/sys/linux/test/arm64-syz_kvm_setup_syzos_vm-vgicv3-its (about)

     1  #
     2  # requires: arch=arm64 -threaded
     3  #
     4  r0 = openat$kvm(0, &AUTO='/dev/kvm\x00', 0x0, 0x0)
     5  r1 = ioctl$KVM_CREATE_VM(r0, AUTO, 0x0)
     6  r2 = syz_kvm_setup_syzos_vm$arm64(r1, &(0x7f0000c00000/0x400000)=nil)
     7  r3 = syz_kvm_add_vcpu$arm64(r2, &AUTO={0x0, &AUTO=[@irq_setup={AUTO, AUTO, {0x1, 0x20}}, @its_setup={AUTO, AUTO, {0x1, 0x1, 0x1}}], AUTO}, 0x0, 0x0)
     8  syz_kvm_vgic_v3_setup(r1, 0x1, 0x100)
     9  
    10  #
    11  # Set up ITS device with redistributor at address 0x08080000 (declared at executor/kvm.h):
    12  # 1. Create KVM_DEV_TYPE_ARM_VGIC_ITS.
    13  #
    14  ioctl$KVM_CREATE_DEVICE(r1, AUTO, &AUTO={0x8, <r4=>0xffffffffffffffff, 0x0})
    15  #
    16  # 2. Set device attribute {KVM_DEV_ARM_VGIC_GRP_ADDR, KVM_VGIC_ITS_ADDR_TYPE, &addr=0x08080000}.
    17  #
    18  ioctl$KVM_SET_DEVICE_ATTR(r4, AUTO, &AUTO=@attr_arm64={0x0, 0x0, 0x4, &AUTO=0x08080000})
    19  #
    20  # 3. Set device attribute {KVM_DEV_ARM_VGIC_GRP_CTRL, KVM_DEV_ARM_VGIC_CTRL_INIT, 0}.
    21  #
    22  ioctl$KVM_SET_DEVICE_ATTR(r4, AUTO, &AUTO=@attr_arm64={0x0, 0x4, 0x0, 0x0})
    23  
    24  r5 = ioctl$KVM_GET_VCPU_MMAP_SIZE(r0, AUTO)
    25  r6 = mmap$KVM_VCPU(&(0x7f0000009000/0x1000)=nil, r5, 0x3, 0x1, r3, 0x0)
    26  
    27  # Run till the end of guest_main(). 0xffffffffffffffff is UEXIT_END.
    28  #
    29  ioctl$KVM_RUN(r3, AUTO, 0x0)
    30  syz_kvm_assert_syzos_uexit$arm64(r6, 0xffffffffffffffff)
    31  #
    32  # Calling KVM_RUN here again would result in infinite loop.
    33  # Instead, signal LPI 0x2000 that is mapped to the event 0, so that the guest can execute another uexit in the IRQ handler.
    34  #
    35  # Address is GITS_BASE_GPA + GITS_TRANSLATER = 0x08080000 + 0x10040
    36  #
    37  ioctl$KVM_SIGNAL_MSI(r1, AUTO, &AUTO={0x8090040, 0x0, 0x0, 0x1, 0x0, ""})
    38  ioctl$KVM_RUN(r3, AUTO, 0x0)
    39  syz_kvm_assert_syzos_uexit$arm64(r6, 0xfffffffffffffffe)