Hi all,
starting with qemu v6.0, some of my aarch64 efi boot tests no longer
work. Analysis shows that PCI devices with IO ports do not instantiate
in qemu v6.0 (or v6.1-rc0) when booting through efi. The problem affects
(at least) ne2k_pci, tulip, dc390, and am53c974. The problem only affects
aarch64, not x86/x86_64.
I bisected the problem to commit 0cf8882fd0 ("acpi/gpex: Inform os to
keep firmware resource map"). Since this commit, PCI device BAR
allocation has changed. Taking tulip as example, the kernel reports
the following PCI bar assignments when running qemu v5.2.
[ 3.921801] pci 0000:00:01.0: [1011:0019] type 00 class 0x020000
[ 3.922207] pci 0000:00:01.0: reg 0x10: [io 0x0000-0x007f]
[ 3.922505] pci 0000:00:01.0: reg 0x14: [mem 0x10000000-0x1000007f]
[ 3.927111] pci 0000:00:01.0: BAR 0: assigned [io 0x1000-0x107f]
[ 3.927455] pci 0000:00:01.0: BAR 1: assigned [mem 0x10000000-0x1000007f]
With qemu v6.0, the assignment is reported as follows.
[ 3.922887] pci 0000:00:01.0: [1011:0019] type 00 class 0x020000
[ 3.923278] pci 0000:00:01.0: reg 0x10: [io 0x0000-0x007f]
[ 3.923451] pci 0000:00:01.0: reg 0x14: [mem 0x10000000-0x1000007f]
and the controller does not instantiate. The problem disapears after
reverting commit 0cf8882fd0.
Attached is a summary of test runs with various devices and qemu v5.2
as well as qemu v6.0, and the command line I use for efi boots.
Did commit 0cf8882fd0 introduce a bug, do I now need need some different
command line to instantiate PCI devices with io ports, or are such devices
simply no longer supported if the system is booted with efi support ?
Thanks,
Guenter
---
Command line (tulip network interface):
CMDLINE="root=/dev/vda console=ttyAMA0"
ROOTFS="rootfs.ext2"
qemu-system-aarch64 -M virt -kernel arch/arm64/boot/Image -no-reboot \
-m 512 -cpu cortex-a57 -no-reboot \
-device tulip,netdev=net0 -netdev user,id=net0 \
-bios QEMU_EFI-aarch64.fd \
-snapshot \
-device virtio-blk-device,drive=d0 \
-drive file=${ROOTFS},if=none,id=d0,format=raw \
-nographic -serial stdio -monitor none \
--append "${CMDLINE}"
---
Boot tests with various devices known to work in qemu v5.2.
v5.2 v6.0 v6.0
efi non-efi efi
e1000 pass pass pass
e1000-82544gc pass pass pass
e1000-82545em pass pass pass
e1000e pass pass pass
i82550 pass pass pass
i82557a pass pass pass
i82557b pass pass pass
i82557c pass pass pass
i82558a pass pass pass
i82559b pass pass pass
i82559c pass pass pass
i82559er pass pass pass
i82562 pass pass pass
i82801 pass pass pass
ne2k_pci pass pass fail <--
pcnet pass pass pass
rtl8139 pass pass pass
tulip pass pass fail <--
usb-net pass pass pass
virtio-net-device
pass pass pass
virtio-net-pci pass pass pass
virtio-net-pci-non-transitional
pass pass pass
usb-xhci pass pass pass
usb-ehci pass pass pass
usb-ohci pass pass pass
usb-uas-xhci pass pass pass
virtio pass pass pass
virtio-blk-pci pass pass pass
virtio-blk-device
pass pass pass
nvme pass pass pass
sdhci pass pass pass
dc390 pass pass fail <--
am53c974 pass pass fail <--
lsi53c895ai pass pass pass
mptsas1068 pass pass pass
lsi53c810 pass pass pass
megasas pass pass pass
megasas-gen2 pass pass pass
virtio-scsi-device
pass pass pass
virtio-scsi-pci pass pass pass
