Hi Folks
The commits between be848676..a6ed6b701 appear to break QEMU guests using a
32bit kernel when booting from virtio_scsi devices. I end up seeing the
following in dmesg:
[ 2.016642] virtio_scsi: probe of virtio0 failed with error -2
Notably - I've tried modifying the amount of RAM the geust boots with, based on
the comments in the commit messages, PAE *is* also enabled in the guest kernel
(the kernel v6.1.76).
qemu-system-x86_64 .... -m 2048M - Guest boots fine
qemu-system-x86_64 .... -m 4095M - Guest does not boot.
In the latter case I still see the 64 bit address space being used in
the BIOS debug log in the latter case:
00.006: === PCI bus & bridge init ===
00.006: PCI: pci_bios_init_bus_rec bus = 0x0
00.007: === PCI device probing ===
00.007: Found 8 PCI devices (max PCI bus is 00)
00.008: PCIe: using q35 mmconfig at 0xb0000000
00.008: === PCI new allocation pass #1 ===
00.008: PCI: check devices
00.009: === PCI new allocation pass #2 ===
00.009: PCI: IO: c000 - c11f
00.009: PCI: 32: 00000000c0000000 - 00000000fec00000
00.009: PCI: 64: 0000380000000000 - 0000380040000000
00.009: PCI: map device bdf=00:02.0 bar 4, addr 380000000000, size 00004000 [prefmem]
00.010: PCI: map device bdf=00:03.0 bar 4, addr 380000004000, size 00004000 [prefmem]
00.010: PCI: map device bdf=00:04.0 bar 4, addr 380000008000, size 00004000 [prefmem]
00.010: PCI: map device bdf=00:02.0 bar 0, addr 0000c000, size 00000040 [io]
00.011: PCI: map device bdf=00:03.0 bar 0, addr 0000c040, size 00000040 [io]
00.011: PCI: map device bdf=00:04.0 bar 0, addr 0000c080, size 00000040 [io]
00.011: PCI: map device bdf=00:1f.3 bar 4, addr 0000c0c0, size 00000040 [io]
00.011: PCI: map device bdf=00:1f.2 bar 4, addr 0000c100, size 00000020 [io]
00.012: PCI: map device bdf=00:04.0 bar 6, addr feb80000, size 00040000 [mem]
00.012: PCI: map device bdf=00:01.0 bar 6, addr febc0000, size 00010000 [mem]
00.012: PCI: map device bdf=00:01.0 bar 2, addr febd0000, size 00001000 [mem]
00.012: PCI: map device bdf=00:02.0 bar 1, addr febd1000, size 00001000 [mem]
00.013: PCI: map device bdf=00:03.0 bar 1, addr febd2000, size 00001000 [mem]
00.013: PCI: map device bdf=00:04.0 bar 1, addr febd3000, size 00001000 [mem]
00.013: PCI: map device bdf=00:1f.2 bar 5, addr febd4000, size 00001000 [mem]
00.013: PCI: map device bdf=00:01.0 bar 0, addr fd000000, size 01000000 [prefmem]
00.014: PCI: init bdf=00:00.0 id=8086:29c0
00.014: PCI: init bdf=00:01.0 id=1234:1111
00.014: PCI: init bdf=00:02.0 id=1af4:1004
00.015: PCI: init bdf=00:03.0 id=1af4:1004
00.016: PCI: init bdf=00:04.0 id=1af4:1000
I'm happy to help test/provide more logs if they are useful.
--
Max Tottenham | Senior Software Engineer
/(* Akamai Technologies
