Does SeaBIOS support QEMU's modern-pio-notify option for virtio devices? My VM hangs during boot when enumerating the virtio-scsi drive if I set modern-pio-notify=on.
Specifically, it spins forever in the while(!vring_more_used(vq)) loop in the call stack:
scsi_drive_setup() cdb_get_inquiry() ... virtio_scsi_process_op()
I get the hang with the minimal command line of: qemu-system-x86_64 -device virtio-scsi-pci,modern-pio-notify=on
I'm using QEMU 2.8.0, and both SeaBIOS 1.10.1 and 1.10.2
Here's the debug log:
SeaBIOS (version 1.10.1-20170402_032207-jb2) BUILD: gcc: (Gentoo 5.4.0-r3 p1.3, pie-0.6.5) 5.4.0 binutils: (Gentoo 2.27 p1.0) 2.27 No Xen hypervisor found. enabling shadow ram Running on QEMU (q35) Running on KVM Add to e820 map: 00000000 80000000 1 Add to e820 map: fffc0000 00040000 2 RamSize: 0x80000000 [cmos] malloc preinit Add to e820 map: 000a0000 00050000 -1 Add to e820 map: 000f0000 00010000 2 Add to e820 map: 7ffc0000 00040000 2 phys_alloc zone=0x000eb2b4 size=79328 align=20 ret=7ffac980 (detail=0x7ffac950) Relocating init from 0x000d7da0 to 0x7ffac980 (size 79328) malloc init Found QEMU fw_cfg QEMU fw_cfg DMA interface supported phys_alloc zone=0x7ffbfe94 size=148 align=10 ret=7ffac850 (detail=0x7ffac820) Add romfile: etc/show-boot-menu (size=2) phys_alloc zone=0x7ffbfe94 size=148 align=10 ret=7ffac780 (detail=0x7ffac750) Add romfile: etc/irq0-override (size=1) phys_alloc zone=0x7ffbfe94 size=148 align=10 ret=7ffac6b0 (detail=0x7ffac680) Add romfile: etc/max-cpus (size=2) phys_alloc zone=0x7ffbfe94 size=148 align=10 ret=7ffac5e0 (detail=0x7ffac5b0) Add romfile: etc/numa-cpu-map (size=16) phys_alloc zone=0x7ffbfe94 size=148 align=10 ret=7ffac510 (detail=0x7ffac4e0) Add romfile: etc/numa-nodes (size=0) phys_alloc zone=0x7ffbfe94 size=148 align=10 ret=7ffac440 (detail=0x7ffac410) Add romfile: bootorder (size=0) phys_alloc zone=0x7ffbfe94 size=148 align=10 ret=7ffac370 (detail=0x7ffac340) Add romfile: etc/acpi/rsdp (size=36) phys_alloc zone=0x7ffbfe94 size=148 align=10 ret=7ffac2a0 (detail=0x7ffac270) Add romfile: etc/acpi/tables (size=131072) phys_alloc zone=0x7ffbfe94 size=148 align=10 ret=7ffac1d0 (detail=0x7ffac1a0) Add romfile: etc/boot-fail-wait (size=4) phys_alloc zone=0x7ffbfe94 size=148 align=10 ret=7ffac100 (detail=0x7ffac0d0) Add romfile: etc/e820 (size=40) phys_alloc zone=0x7ffbfe94 size=148 align=10 ret=7ffac030 (detail=0x7ffac000) Add romfile: etc/msr_feature_control (size=8) phys_alloc zone=0x7ffbfe94 size=148 align=10 ret=7ffabf60 (detail=0x7ffabf30) Add romfile: etc/smbios/smbios-anchor (size=31) phys_alloc zone=0x7ffbfe94 size=148 align=10 ret=7ffabe90 (detail=0x7ffabe60) Add romfile: etc/smbios/smbios-tables (size=308) phys_alloc zone=0x7ffbfe94 size=148 align=10 ret=7ffabdc0 (detail=0x7ffabd90) Add romfile: etc/system-states (size=6) phys_alloc zone=0x7ffbfe94 size=148 align=10 ret=7ffabcf0 (detail=0x7ffabcc0) Add romfile: etc/table-loader (size=4096) phys_alloc zone=0x7ffbfe94 size=148 align=10 ret=7ffabc20 (detail=0x7ffabbf0) Add romfile: etc/tpm/log (size=0) phys_alloc zone=0x7ffbfe94 size=148 align=10 ret=7ffabb50 (detail=0x7ffabb20) Add romfile: genroms/kvmvapic.bin (size=9216) phys_alloc zone=0x7ffbfe94 size=41 align=10 ret=7ffabaf0 (detail=0x7ffabac0) Copying romfile 'etc/e820' (len 40) Add to e820 map: feffc000 00004000 2 RamBlock: addr 0x0000000000000000 len 0x0000000080000000 [e820] Moving pm_base to 0x600 init ivt init bda Add to e820 map: 0009fc00 00000400 2 init bios32 init PMM init PNPBIOS table init keyboard init mouse init pic math cp init pci setup === PCI bus & bridge init === PCI: pci_bios_init_bus_rec bus = 0x0 === PCI device probing === PCI probe phys_alloc zone=0x7ffbfe94 size=32 align=10 ret=7ffabaa0 (detail=0x7ffaba70) PCI device 00:00.0 (vd=8086:29c0 c=0600) phys_alloc zone=0x7ffbfe94 size=32 align=10 ret=7ffaba50 (detail=0x7ffaba20) PCI device 00:01.0 (vd=1234:1111 c=0300) phys_alloc zone=0x7ffbfe94 size=32 align=10 ret=7ffaba00 (detail=0x7ffab9d0) PCI device 00:02.0 (vd=1af4:1048 c=0100) phys_alloc zone=0x7ffbfe94 size=32 align=10 ret=7ffab9b0 (detail=0x7ffab980) PCI device 00:03.0 (vd=1af4:1041 c=0200) phys_alloc zone=0x7ffbfe94 size=32 align=10 ret=7ffab960 (detail=0x7ffab930) PCI device 00:04.0 (vd=1af4:1052 c=0980) phys_alloc zone=0x7ffbfe94 size=32 align=10 ret=7ffab910 (detail=0x7ffab8e0) PCI device 00:1f.0 (vd=8086:2918 c=0601) phys_alloc zone=0x7ffbfe94 size=32 align=10 ret=7ffab8c0 (detail=0x7ffab890) PCI device 00:1f.2 (vd=8086:2922 c=0106) phys_alloc zone=0x7ffbfe94 size=32 align=10 ret=7ffab870 (detail=0x7ffab840) PCI device 00:1f.3 (vd=8086:2930 c=0c05) Found 8 PCI devices (max PCI bus is 00) Add to e820 map: b0000000 10000000 2 === PCI new allocation pass #1 === phys_alloc zone=0x7ffbfe94 size=40 align=10 ret=7ffab810 (detail=0x7ffab7e0) PCI: check devices phys_alloc zone=0x7ffbfe94 size=40 align=10 ret=7ffab7b0 (detail=0x7ffab780) phys_alloc zone=0x7ffbfe94 size=40 align=10 ret=7ffab750 (detail=0x7ffab720) phys_alloc zone=0x7ffbfe94 size=40 align=10 ret=7ffab6f0 (detail=0x7ffab6c0) phys_alloc zone=0x7ffbfe94 size=40 align=10 ret=7ffab690 (detail=0x7ffab660) phys_alloc zone=0x7ffbfe94 size=40 align=10 ret=7ffab630 (detail=0x7ffab600) phys_alloc zone=0x7ffbfe94 size=40 align=10 ret=7ffab5d0 (detail=0x7ffab5a0) phys_alloc zone=0x7ffbfe94 size=40 align=10 ret=7ffab570 (detail=0x7ffab540) phys_alloc zone=0x7ffbfe94 size=40 align=10 ret=7ffab510 (detail=0x7ffab4e0) phys_alloc zone=0x7ffbfe94 size=40 align=10 ret=7ffab4b0 (detail=0x7ffab480) phys_alloc zone=0x7ffbfe94 size=40 align=10 ret=7ffab450 (detail=0x7ffab420) phys_alloc zone=0x7ffbfe94 size=40 align=10 ret=7ffab3f0 (detail=0x7ffab3c0) phys_alloc zone=0x7ffbfe94 size=40 align=10 ret=7ffab390 (detail=0x7ffab360) phys_alloc zone=0x7ffbfe94 size=40 align=10 ret=7ffab330 (detail=0x7ffab300) phys_alloc zone=0x7ffbfe94 size=40 align=10 ret=7ffab2d0 (detail=0x7ffab2a0) phys_alloc zone=0x7ffbfe94 size=40 align=10 ret=7ffab270 (detail=0x7ffab240) phys_alloc zone=0x7ffbfe94 size=40 align=10 ret=7ffab210 (detail=0x7ffab1e0) === PCI new allocation pass #2 === PCI: IO: c000 - c06b PCI: 32: 00000000c0000000 - 00000000fec00000 PCI: map device bdf=00:1f.3 bar 4, addr 0000c000, size 00000040 [io] phys_free 7ffab210 (detail=0x7ffab1e0) PCI: map device bdf=00:1f.2 bar 4, addr 0000c040, size 00000020 [io] phys_free 7ffab2d0 (detail=0x7ffab2a0) PCI: map device bdf=00:02.0 bar 2, addr 0000c060, size 00000004 [io] phys_free 7ffab630 (detail=0x7ffab600) PCI: map device bdf=00:03.0 bar 2, addr 0000c064, size 00000004 [io] phys_free 7ffab510 (detail=0x7ffab4e0) PCI: map device bdf=00:04.0 bar 2, addr 0000c068, size 00000004 [io] phys_free 7ffab390 (detail=0x7ffab360) PCI: map device bdf=00:03.0 bar 6, addr feb80000, size 00040000 [mem] phys_free 7ffab450 (detail=0x7ffab420) PCI: map device bdf=00:01.0 bar 6, addr febc0000, size 00010000 [mem] phys_free 7ffab6f0 (detail=0x7ffab6c0) PCI: map device bdf=00:01.0 bar 2, addr febd0000, size 00001000 [mem] phys_free 7ffab750 (detail=0x7ffab720) PCI: map device bdf=00:02.0 bar 1, addr febd1000, size 00001000 [mem] phys_free 7ffab690 (detail=0x7ffab660) PCI: map device bdf=00:03.0 bar 1, addr febd2000, size 00001000 [mem] phys_free 7ffab570 (detail=0x7ffab540) PCI: map device bdf=00:04.0 bar 1, addr febd3000, size 00001000 [mem] phys_free 7ffab3f0 (detail=0x7ffab3c0) PCI: map device bdf=00:1f.2 bar 5, addr febd4000, size 00001000 [mem] phys_free 7ffab270 (detail=0x7ffab240) PCI: map device bdf=00:01.0 bar 0, addr c0000000, size 20000000 [prefmem] phys_free 7ffab7b0 (detail=0x7ffab780) PCI: map device bdf=00:02.0 bar 4, addr e0000000, size 00004000 [prefmem] phys_free 7ffab5d0 (detail=0x7ffab5a0) PCI: map device bdf=00:03.0 bar 4, addr e0004000, size 00004000 [prefmem] phys_free 7ffab4b0 (detail=0x7ffab480) PCI: map device bdf=00:04.0 bar 4, addr e0008000, size 00004000 [prefmem] phys_free 7ffab330 (detail=0x7ffab300) PCI: init bdf=00:00.0 id=8086:29c0 PCI: init bdf=00:01.0 id=1234:1111 PCI: init bdf=00:02.0 id=1af4:1048 PCI: init bdf=00:03.0 id=1af4:1041 PCI: init bdf=00:04.0 id=1af4:1052 PCI: init bdf=00:1f.0 id=8086:2918 Q35 LPC init: elcr=00 0c Add to e820 map: fed1c000 00004000 2 Using pmtimer, ioport 0x608 PCI: init bdf=00:1f.2 id=8086:2922 PCI: init bdf=00:1f.3 id=8086:2930 phys_free 7ffab810 (detail=0x7ffab7e0) PCI: Using 00:01.0 for primary VGA init smm init mtrr handle_smp: apic_id=0x1 Found 2 cpu(s) max supported 2 cpu(s) init PIR table phys_alloc zone=0x7ffbfe9c size=128 align=10 ret=f5a60 (detail=0x7ffab810) Copying PIR from 0x7ffbfc80 to 0x000f5a60 init MPTable phys_alloc zone=0x7ffbfe94 size=32768 align=10 ret=7ffa3810 (detail=0x7ffa37e0) phys_alloc zone=0x7ffbfe9c size=240 align=10 ret=f5970 (detail=0x7ffa37b0) Copying MPTABLE from 0x00006e4c/7ffa3810 to 0x000f5970 phys_free 7ffa3810 (detail=0x7ffa37e0) phys_alloc zone=0x7ffbfe94 size=308 align=10 ret=7ffab6d0 (detail=0x7ffab6a0) phys_alloc zone=0x7ffbfe9c size=379 align=10 ret=f57f0 (detail=0x7ffab670) phys_free 7ffab6d0 (detail=0x7ffab6a0) phys_alloc zone=0x7ffbfe9c size=31 align=10 ret=f57d0 (detail=0x7ffab7e0) Copying SMBIOS entry point from 0x00006e4c to 0x000f57d0 load ACPI tables phys_alloc zone=0x7ffbfe94 size=4097 align=10 ret=7ffaa660 (detail=0x7ffab7b0) Copying romfile 'etc/table-loader' (len 4096) phys_alloc zone=0x7ffbfe94 size=260 align=10 ret=7ffab6a0 (detail=0x7ffaa630) phys_alloc zone=0x7ffbfe9c size=36 align=10 ret=f57a0 (detail=0x7ffaa600) phys_alloc zone=0x7ffbfea0 size=131072 align=40 ret=7ffe0000 (detail=0x7ffaa5d0) phys_free 7ffab6a0 (detail=0x7ffaa630) phys_free 7ffaa660 (detail=0x7ffab7b0) init timer Scan for VGA option rom Attempting to init PCI bdf 00:01.0 (vd 1234:1111) Attempting to map option rom on dev 00:01.0 Option rom sizing returned febc0000 ffff0000 Inspecting possible rom at 0xfebc0000 (vd=1234:1111 bdf=00:01.0) WARNING! Found unaligned PCI rom (vd=1234:1111) Copying option rom (size 41472) from 0xfebc0000 to 0x000c0000 Checking rom 0x000c0000 (sig aa55 size 81) Running option rom at c000:0003 Turning on vga text mode console SeaBIOS (version 1.10.1-20170402_032207-jb2) init usb init ps2port phys_alloc zone=0x7ffbfe94 size=4096 align=1000 ret=7ffa9000 (detail=0x7ffab7b0) /7ffa9000\ Start thread |7ffa9000| i8042_flush |7ffa9000| i8042_command cmd=1aa |7ffa9000| i8042_wait_write |7ffa9000| i8042_wait_read |7ffa9000| i8042 param=55 |7ffa9000| i8042_command cmd=1ab |7ffa9000| i8042_wait_write |7ffa9000| i8042_wait_read |7ffa9000| i8042 param=0 |7ffa9000| ps2_command aux=0 cmd=1ff |7ffa9000| i8042 ctr old=30 new=30 |7ffa9000| i8042_command cmd=1060 |7ffa9000| i8042_wait_write |7ffa9000| i8042_wait_write init floppy drives init hard drives init ahci phys_alloc zone=0x7ffbfea4 size=2048 align=10 ret=ea2e0 (detail=0x7ffab780) phys_alloc zone=0x7ffbfe9c size=20 align=10 ret=f5780 (detail=0x7ffab750) AHCI controller at 00:1f.2, iobase 0xfebd4000, irq 10 AHCI: cap 0x40141f05, ports_impl 0x3f phys_alloc zone=0x7ffbfe94 size=68 align=10 ret=7ffab700 (detail=0x7ffab6d0) phys_alloc zone=0x7ffbfe94 size=1024 align=400 ret=7ffab000 (detail=0x7ffab6a0) phys_alloc zone=0x7ffbfe94 size=256 align=100 ret=7ffab500 (detail=0x7ffab640) phys_alloc zone=0x7ffbfe94 size=256 align=100 ret=7ffab400 (detail=0x7ffab610) phys_alloc zone=0x7ffbfe94 size=4096 align=1000 ret=7ffa8000 (detail=0x7ffaafd0) /7ffa8000\ Start thread |7ffa8000| AHCI/0: probing |7ffa9000| i8042_command cmd=1060 |7ffa9000| i8042_wait_write |7ffa9000| i8042_wait_write |7ffa9000| ps2_sendbyte aux=0 cmd=ff |7ffa9000| i8042_kbd_write c=255 |7ffa9000| i8042_wait_write |7ffa9000| ps2 read fa |7ffa9000| ps2 read aa |7ffa9000| i8042_command cmd=1060 |7ffa9000| i8042_wait_write |7ffa9000| i8042_wait_write |7ffa9000| ps2_command aux=0 cmd=f5 |7ffa9000| i8042 ctr old=30 new=30 |7ffa9000| i8042_command cmd=1060 |7ffa9000| i8042_wait_write |7ffa9000| i8042_wait_write phys_alloc zone=0x7ffbfe94 size=68 align=10 ret=7ffaaf80 (detail=0x7ffaaf50) phys_alloc zone=0x7ffbfe94 size=1024 align=400 ret=7ffaa800 (detail=0x7ffaaf20) phys_alloc zone=0x7ffbfe94 size=256 align=100 ret=7ffaae00 (detail=0x7ffaadd0) phys_alloc zone=0x7ffbfe94 size=256 align=100 ret=7ffaac00 (detail=0x7ffaada0) phys_alloc zone=0x7ffbfe94 size=4096 align=1000 ret=7ffa7000 (detail=0x7ffaad70) /7ffa7000\ Start thread |7ffa7000| AHCI/1: probing |7ffa9000| i8042_command cmd=1060 |7ffa9000| i8042_wait_write |7ffa9000| i8042_wait_write |7ffa9000| ps2_sendbyte aux=0 cmd=f5 |7ffa9000| i8042_kbd_write c=245 |7ffa9000| i8042_wait_write |7ffa9000| ps2 read fa |7ffa9000| i8042_command cmd=1060 |7ffa9000| i8042_wait_write |7ffa9000| i8042_wait_write |7ffa9000| ps2_command aux=0 cmd=10f0 |7ffa9000| i8042 ctr old=30 new=30 |7ffa9000| i8042_command cmd=1060 |7ffa9000| i8042_wait_write |7ffa9000| i8042_wait_write phys_alloc zone=0x7ffbfe94 size=68 align=10 ret=7ffaad20 (detail=0x7ffaa7d0) phys_alloc zone=0x7ffbfe94 size=1024 align=400 ret=7ffaa000 (detail=0x7ffaa7a0) phys_alloc zone=0x7ffbfe94 size=256 align=100 ret=7ffaa400 (detail=0x7ffaa770) phys_alloc zone=0x7ffbfe94 size=256 align=100 ret=7ffa6f00 (detail=0x7ffaa740) phys_alloc zone=0x7ffbfe94 size=4096 align=1000 ret=7ffa5000 (detail=0x7ffaa710) /7ffa5000\ Start thread |7ffa5000| AHCI/2: probing |7ffa8000| AHCI/0: link down |7ffa9000| i8042_command cmd=1060 |7ffa9000| i8042_wait_write |7ffa9000| i8042_wait_write |7ffa9000| ps2_sendbyte aux=0 cmd=f0 |7ffa9000| i8042_kbd_write c=240 |7ffa9000| i8042_wait_write |7ffa9000| ps2 read fa |7ffa9000| ps2_sendbyte aux=0 cmd=2 |7ffa9000| i8042_kbd_write c=2 |7ffa9000| i8042_wait_write |7ffa9000| ps2 read fa |7ffa9000| i8042_command cmd=1060 |7ffa9000| i8042_wait_write |7ffa9000| i8042_wait_write |7ffa9000| ps2_command aux=0 cmd=f4 |7ffa9000| i8042 ctr old=61 new=70 |7ffa9000| i8042_command cmd=1060 |7ffa9000| i8042_wait_write |7ffa9000| i8042_wait_write phys_alloc zone=0x7ffbfe94 size=68 align=10 ret=7ffaa6c0 (detail=0x7ffaa690) phys_alloc zone=0x7ffbfe94 size=1024 align=400 ret=7ffa6800 (detail=0x7ffaa660) phys_alloc zone=0x7ffbfe94 size=256 align=100 ret=7ffa6e00 (detail=0x7ffaa630) phys_alloc zone=0x7ffbfe94 size=256 align=100 ret=7ffa6d00 (detail=0x7ffaa5a0) phys_alloc zone=0x7ffbfe94 size=4096 align=1000 ret=7ffa4000 (detail=0x7ffaa570) /7ffa4000\ Start thread |7ffa4000| AHCI/3: probing |7ffa7000| AHCI/1: link down |7ffa8000| phys_free 7ffab000 (detail=0x7ffab6a0) |7ffa8000| phys_free 7ffab500 (detail=0x7ffab640) |7ffa8000| phys_free 7ffab400 (detail=0x7ffab610) |7ffa8000| phys_free 7ffab700 (detail=0x7ffab6d0) \7ffa8000/ End thread phys_free 7ffa8000 (detail=0x7ffaafd0) |7ffa9000| i8042_command cmd=1060 |7ffa9000| i8042_wait_write |7ffa9000| i8042_wait_write |7ffa9000| ps2_sendbyte aux=0 cmd=f4 |7ffa9000| i8042_kbd_write c=244 |7ffa9000| i8042_wait_write |7ffa9000| ps2 read fa |7ffa9000| i8042_command cmd=1060 |7ffa9000| i8042_wait_write |7ffa9000| i8042_wait_write |7ffa9000| PS2 keyboard initialized \7ffa9000/ End thread phys_free 7ffa9000 (detail=0x7ffab7b0) phys_alloc zone=0x7ffbfe94 size=68 align=10 ret=7ffab700 (detail=0x7ffab7b0) phys_alloc zone=0x7ffbfe94 size=1024 align=400 ret=7ffab000 (detail=0x7ffab6d0) phys_alloc zone=0x7ffbfe94 size=256 align=100 ret=7ffab500 (detail=0x7ffab6a0) phys_alloc zone=0x7ffbfe94 size=256 align=100 ret=7ffab400 (detail=0x7ffab640) phys_alloc zone=0x7ffbfe94 size=4096 align=1000 ret=7ffa9000 (detail=0x7ffab610) /7ffa9000\ Start thread |7ffa9000| AHCI/4: probing |7ffa5000| AHCI/2: link down |7ffa7000| phys_free 7ffaa800 (detail=0x7ffaaf20) |7ffa7000| phys_free 7ffaae00 (detail=0x7ffaadd0) |7ffa7000| phys_free 7ffaac00 (detail=0x7ffaada0) |7ffa7000| phys_free 7ffaaf80 (detail=0x7ffaaf50) \7ffa7000/ End thread phys_free 7ffa7000 (detail=0x7ffaad70) phys_alloc zone=0x7ffbfe94 size=68 align=10 ret=7ffaafb0 (detail=0x7ffaaf80) phys_alloc zone=0x7ffbfe94 size=1024 align=400 ret=7ffaa800 (detail=0x7ffaaf50) phys_alloc zone=0x7ffbfe94 size=256 align=100 ret=7ffaae00 (detail=0x7ffaaf20) phys_alloc zone=0x7ffbfe94 size=256 align=100 ret=7ffaac00 (detail=0x7ffaadd0) phys_alloc zone=0x7ffbfe94 size=4096 align=1000 ret=7ffa8000 (detail=0x7ffaada0) /7ffa8000\ Start thread |7ffa8000| AHCI/5: probing |7ffa4000| AHCI/3: link down |7ffa5000| phys_free 7ffaa000 (detail=0x7ffaa7a0) |7ffa5000| phys_free 7ffaa400 (detail=0x7ffaa770) |7ffa5000| phys_free 7ffa6f00 (detail=0x7ffaa740) |7ffa5000| phys_free 7ffaad20 (detail=0x7ffaa7d0) \7ffa5000/ End thread phys_free 7ffa5000 (detail=0x7ffaa710) init virtio-blk init virtio-scsi phys_alloc zone=0x7ffbfe94 size=4096 align=1000 ret=7ffa7000 (detail=0x7ffaad70) /7ffa7000\ Start thread |7ffa7000| found virtio-scsi at 00:02.0 |7ffa7000| phys_alloc zone=0x7ffbfea0 size=55 align=10 ret=7ffdffc0 (detail=0x7ffaad40) |7ffa7000| pci dev 0:2 virtio cap at 0x98 type 5 [pci cfg access] |7ffa7000| pci dev 0:2 virtio cap at 0x84 type 2 bar 2 at 0x0000c060 off +0x0000 [io] |7ffa7000| pci dev 0:2 virtio cap at 0x60 type 4 bar 4 at 0xe0000000 off +0x2000 [mmio] |7ffa7000| pci dev 0:2 virtio cap at 0x50 type 3 bar 4 at 0xe0000000 off +0x1000 [mmio] |7ffa7000| pci dev 0:2 virtio cap at 0x40 type 1 bar 4 at 0xe0000000 off +0x0000 [mmio] |7ffa7000| pci dev 00:02.0 using modern (1.0) virtio mode |7ffa7000| phys_alloc zone=0x7ffbfea0 size=5408 align=1000 ret=7ffde000 (detail=0x7ffaad10) |7ffa7000| phys_alloc zone=0x7ffbfe9c size=52 align=10 ret=f5740 (detail=0x7ffaa7d0) |7ffa7000| Searching bootorder for: /pci@i0cf8/*@2/*@0/*@0,0 |7ffa9000| AHCI/4: link down |7ffa4000| phys_free 7ffa6800 (detail=0x7ffaa660) |7ffa4000| phys_free 7ffa6e00 (detail=0x7ffaa630) |7ffa4000| phys_free 7ffa6d00 (detail=0x7ffaa5a0) |7ffa4000| phys_free 7ffaa6c0 (detail=0x7ffaa690) \7ffa4000/ End thread phys_free 7ffa4000 (detail=0x7ffaa570) init lsi53c895a init esp init megasas init pvscsi init MPT init lpt Found 0 lpt ports init serial Found 0 serial ports i8042_command cmd=ae i8042_wait_write |7ffa8000| AHCI/5: link down |7ffa9000| phys_free 7ffab000 (detail=0x7ffab6d0) |7ffa9000| phys_free 7ffab500 (detail=0x7ffab6a0) |7ffa9000| phys_free 7ffab400 (detail=0x7ffab640) |7ffa9000| phys_free 7ffab700 (detail=0x7ffab7b0) \7ffa9000/ End thread phys_free 7ffa9000 (detail=0x7ffab610) |7ffa8000| phys_free 7ffaa800 (detail=0x7ffaaf50) |7ffa8000| phys_free 7ffaae00 (detail=0x7ffaaf20) |7ffa8000| phys_free 7ffaac00 (detail=0x7ffaadd0) |7ffa8000| phys_free 7ffaafb0 (detail=0x7ffaaf80) \7ffa8000/ End thread phys_free 7ffa8000 (detail=0x7ffaada0)
Thanks,
Jonathan Boeing
On 02/04/2017 23:41, Jonathan Boeing wrote:
Specifically, it spins forever in the while(!vring_more_used(vq)) loop in the call stack:
scsi_drive_setup() cdb_get_inquiry() ... virtio_scsi_process_op()
Hi,
this is a QEMU bug. The fix is commit e49a661 ("virtio: always use handle_aio_output if registered", 2017-03-22).
Thanks,
Paolo
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Jonathan Boeing -
Paolo Bonzini