Since kernel 4.7, qemu no longer works.
$ qemu-system-aarch64 -nodefaults -no-reboot -nographic -vga none -enable-kvm
-cpu host -M virt,gic-version=host
qemu-system-aarch64: Unable to determine GIC version supported by host
$ qemu-system-aarch64 -nodefaults -no-reboot -nographic -vga none -enable-kvm
-cpu host -M virt
[ 104.275121] Unable to handle kernel paging request at virtual address
fffffffffffffff8
[ 104.283061] pgd = fffffe07ca6e0000
[ 104.286452] [fffffffffffffff8] *pgd=0000000000000000, *pud=0000000000000000,
*pmd=0000000000000000
[ 104.295887] Internal error: Oops: 96000006 [#1] SMP
[ 104.300755] Modules linked in: loop af_packet nls_iso8859_1 nls_cp437 vfat
fat dm_mod amd_xgbe i2c_designware_platform i2c_designware_core ptp pps_core
spi_pl022 aes_ce_blk ipmi_si ccp ipmi_msghandler ablk_helper uio_pdrv_genirq
uio cryptd aes_ce_cipher ghash_ce sha2_ce sha1_ce ahci_platform
libahci_platform sg efivarfs
[ 104.329142] CPU: 3 PID: 6513 Comm: qemu-system-aar Tainted: G W I
4.7.3-2.g817edd7-default #1
[ 104.338610] Hardware name: AMD Overdrive/Supercharger/Default string, BIOS
ROD1002C 04/08/2016
[ 104.347209] task: fffffe07c6e39580 ti: fffffe07c9ac4000 task.ti:
fffffe07c9ac4000
[ 104.354685] PC is at _raw_spin_lock+0x1c/0x58
[ 104.359034] LR is at kvm_vgic_flush_hwstate+0x88/0x288
[ 104.364161] pc : [<fffffc00087bb6fc>] lr : [<fffffc00080b5b08>] pstate:
a0000145
[ 104.371543] sp : fffffe07c9ac7ac0
[ 104.374846] x29: fffffe07c9ac7ac0 x28: fffffc0008fc3000
[ 104.380151] x27: fffffc00087e1000 x26: 000000000000001d
[ 104.385456] x25: fffffe07c9ac7ba0 x24: fffffe07ca09e830
[ 104.390761] x23: fffffe07ca09e838 x22: fffffe07ca09cfe0
[ 104.396065] x21: fffffc0008ea1000 x20: 0000000000000000
[ 104.401369] x19: fffffffffffffff8 x18: 0000000000001985
[ 104.406673] x17: 000003ffa5c108f0 x16: fffffc000826d298
[ 104.411976] x15: 0000000000001a72 x14: 000002aac9c905c4
[ 104.417280] x13: 000003ffa255e380 x12: 000002aa00000000
[ 104.422584] x11: 000003ffa255e320 x10: 0000000000000000
[ 104.427887] x9 : 000003ffa79dfc68 x8 : 0000000000000002
[ 104.433191] x7 : 0000000000000000 x6 : 0000000000000000
[ 104.438494] x5 : 0000000000000007 x4 : 0000000000000080
[ 104.443798] x3 : 0000008000000000 x2 : 0000000000000000
[ 104.449101] x1 : 0000000000000000 x0 : fffffc00080b5b08
[ 104.454404]
[ 104.455885] Process qemu-system-aar (pid: 6513, stack limit =
0xfffffe07c9ac4020)
[ 104.463356] Stack: (0xfffffe07c9ac7ac0 to 0xfffffe07c9ac8000)
[ 104.469091] 7ac0: fffffe07c9ac7ae0 fffffc00080b5b08 fffffffffffffff8
fffffe07c9dc0000
[ 104.476909] 7ae0: fffffe07c9ac7b20 fffffc00080a95b0 fffffe07ca09cfe0
fffffe07ca09dfe0
[ 104.484727] 7b00: fffffc0008ea1000 fffffe07c9dc0000 fffffe07ca272000
fffffc0008ea1660
[ 104.492545] 7b20: fffffe07c9ac7bb0 fffffc000809fa8c 0000000000000000
fffffe07ca09cfe0
[ 104.500363] 7b40: 0000000000000000 fffffe07c9ac4000 fffffe07c692af00
0000000000000000
[ 104.508180] 7b60: 0000000000000120 000000000000001d fffffc00087e1000
fffffe07c9ac4000
[ 104.515998] 7b80: fffffc0008fc33b0 fffffc0008fc3398 fffffffe7ffbfeff
fffffc000809fea0
[ 104.523815] 7ba0: 0000000000000000 fffffe07ca09cfe0 fffffe07c9ac7e00
fffffc000826cc48
[ 104.531633] 7bc0: 000000000000ae80 fffffe07c692af00 0000000000000000
fffffe07a04e9bd0
[ 104.539450] 7be0: 000000000000000d 000002aaca3b4470 fffffe07c9ac7c60
fffffc0008148754
[ 104.547268] 7c00: fffffe07c9ac7c20 fffffc0008147834 fffffe07c9ac4000
0000000000000002
[ 104.555085] 7c20: fffffe07c9ac7c60 fffffc000814876c fffffe07c9ac7cc0
fffffc000823826c
[ 104.562903] 7c40: fffffe07c0007100 fffffc00080cc7ec fffffe07c7e86d60
00000000000001c0
[ 104.570720] 7c60: 0000000000000000 0000000000000015 0000000000000120
0000000000000089
[ 104.578538] 7c80: fffffc00087e1000 fffffe07c9ac4000 fffffe07c9ac7cb0
fffffc00081483f8
[ 104.586355] 7ca0: 0000000000000000 000002aaca3b0000 fffffe07c9ac7d20
fffffc000814895c
[ 104.594172] 7cc0: 000002aaca3b4470 0000000000000000 fffffe07c9ac7d78
00000000ffffffff
[ 104.601990] 7ce0: 0000000000000001 0000000000000000 0000000000000001
0000000000000062
[ 104.609807] 7d00: fffffe07c9ac7d20 fffffc0008148984 000002aaca3b4470
0000000000000000
[ 104.617625] 7d20: fffffe07c9ac7da0 fffffc000814a87c 0000000000000081
000002aaca3b4470
[ 104.625442] 7d40: 0000000000000000 0000000000000000 0000000000000000
0000000000000000
[ 104.633259] 7d60: 0000000000000001 fffffe07c9ac7e40 0000000000000000
0000000000000001
[ 104.641079] 7d80: fffffe07c9ac7d78 000002aaca3b0000 fffffe07ca636c80
0000000000004470
[ 104.648898] 7da0: fffffe07c9ac7e50 fffffc000814ade0 0000000000000001
0000000000000000
[ 104.656716] 7dc0: 0000000000000081 000002aaca3b4470 0000000000000001
0000000000000000
[ 104.664534] 7de0: 0000000000000000 0000000000000062 fffffc00087e1000
fffffe07c9ac4000
[ 104.672351] 7e00: fffffe07c9ac7e80 fffffc000826d32c 0000000000000000
fffffe07c692af01
[ 104.680168] 7e20: fffffe07c692af00 000000000000000d 000000000000ae80
0000000000000000
[ 104.687986] 7e40: fffffe07c9ac7e80 fffffc000826d2e4 0000000000000000
fffffe07c692af01
[ 104.695803] 7e60: fffffe07c692af00 000000000000000d 000000000000ae80
000003ffa5cdae84
[ 104.703620] 7e80: 0000000000000000 fffffc0008084eb0 0000000000000000
000002aaf1908ab0
[ 104.711438] 7ea0: ffffffffffffffff 000003ffa5c108fc 0000000020000000
0000000000000015
[ 104.719255] 7ec0: 000000000000000d 000000000000ae80 0000000000000000
0000000000000000
[ 104.727072] 7ee0: 00000000ffffffd8 000003ffa255e320 0000000000000001
0000000000000000
[ 104.734890] 7f00: 000000000000001d 000003ffa79dfc68 0000000000000000
000003ffa255e320
[ 104.742706] 7f20: 000002aa00000000 000003ffa255e380 000002aac9c905c4
0000000000001a72
[ 104.750523] 7f40: 000002aaca31de70 000003ffa5c108f0 0000000000001985
000002aaca31f000
[ 104.758340] 7f60: 000002aaf1908ab0 0000000000000000 000000000000ae80
000002aaca31f000
[ 104.766158] 7f80: 000002aaca3b4000 000003ffa255f320 000002aaca3b4328
000003ffa255ec30
[ 104.773974] 7fa0: 000002aaca7dec7c 000003ffa255e1f0 000002aac9bdf9ec
000003ffa255e1f0
[ 104.781791] 7fc0: 000003ffa5c108fc 0000000020000000 000000000000000d
000000000000001d
[ 104.789608] 7fe0: 0000000000000000 0000000000000000 0000000000000000
0000000000000000
[ 104.797424] Call trace:
[ 104.799860] Exception stack(0xfffffe07c9ac78f0 to 0xfffffe07c9ac7a20)
[ 104.806289] 78e0: fffffffffffffff8
0000040000000000
[ 104.814106] 7900: fffffe07c9ac7ac0 fffffc00087bb6fc fffffe07c3425b00
000000000000027b
[ 104.821923] 7920: 0000000000001000 000000000000009e 000000000000027b
000000000000027b
[ 104.829740] 7940: 000000000000027b 000000000000027b 0000000000000400
0000000000000327
[ 104.837558] 7960: 0000000000000001 0000000000000001 0000000000000000
0000000000000000
[ 104.845375] 7980: 0000000000000000 0000000000000000 fffffc00080b5b08
0000000000000000
[ 104.853193] 79a0: 0000000000000000 0000008000000000 0000000000000080
0000000000000007
[ 104.861010] 79c0: 0000000000000000 0000000000000000 0000000000000002
000003ffa79dfc68
[ 104.868827] 79e0: 0000000000000000 000003ffa255e320 000002aa00000000
000003ffa255e380
[ 104.876644] 7a00: 000002aac9c905c4 0000000000001a72 fffffc000826d298
000003ffa5c108f0
[ 104.884463] [<fffffc00087bb6fc>] _raw_spin_lock+0x1c/0x58
[ 104.889852] [<fffffc00080b5b08>] kvm_vgic_flush_hwstate+0x88/0x288
[ 104.896022] [<fffffc00080a95b0>] kvm_arch_vcpu_ioctl_run+0xb0/0x5a0
[ 104.902279] [<fffffc000809fa8c>] kvm_vcpu_ioctl+0x2f4/0x710
[ 104.907842] [<fffffc000826cc48>] do_vfs_ioctl+0xb0/0x700
[ 104.913143] [<fffffc000826d32c>] SyS_ioctl+0x94/0xa8
[ 104.918097] [<fffffc0008084eb0>] el0_svc_naked+0x24/0x28
[ 104.923398] Code: aa0003f3 aa1e03e0 d503201f f9800271 (885ffe60)
[ 104.929546] ---[ end trace 9fa2081332cd6208 ]---