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hw/sparc64/sun4u: Mark unusable PCI busses as full to ease device plugging

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When trying to plug a PCI device to a Sparc64 machine, you currently
have to specify the right bus ("bus=pciB"), otherwise you get this error:

 $ qemu-system-sparc64 -device virtio-scsi-pci
 qemu-system-sparc64: -device virtio-scsi-pci: PCI: no slot/function
 available for virtio-scsi-pci, all in use or reserved

This is quite annoying for the unexperienced users, and it also breaks
e.g. the iotests ("make check-block") when running with qemu-system-sparc64.

Mark the non-usable PCI busses as full now, so that QEMU can automatically
plug new PCI devices to the right "pciB" bus.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20260309181452.83702-1-thuth@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@oss.qualcomm.com>
This commit is contained in:
Thomas Huth
2026-03-09 19:14:52 +01:00
committed by Philippe Mathieu-Daudé
parent eca2c16212
commit 506fa577db
1 changed files with 7 additions and 0 deletions
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7
hw/sparc64/sun4u.c
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@@ -719,6 +719,13 @@ static void sun4uv_init(MemoryRegion *address_space_mem,
fw_cfg_add_i16(fw_cfg, FW_CFG_SPARC64_DEPTH, graphic_depth);
qemu_register_boot_set(fw_cfg_boot_set, fw_cfg);
/*
* Mark internal PCI busses as full so that the plugging of additional
* PCI devices happens on the right bus that still has free slots:
*/
qbus_mark_full(&pci_bus->qbus);
qbus_mark_full(&pci_busA->qbus);
}
enum {