On 08/06/2026 23.29, Mark Cave-Ayland wrote:
On 08/06/2026 09:26, Michael Tokarev wrote:
On 30.04.2026 12:50, Thomas Huth wrote:
On 09/03/2026 19.14, Thomas Huth wrote:
From: Thomas Huth <[email protected]>
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 <[email protected]>
---
v2: Do the change in the machine code, not in the sabre device
hw/sparc64/sun4u.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/hw/sparc64/sun4u.c b/hw/sparc64/sun4u.c
index b8bda1eb816..37539535c6c 100644
--- a/hw/sparc64/sun4u.c
+++ b/hw/sparc64/sun4u.c
@@ -723,6 +723,13 @@ 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 {
Friendly ping!
This, being a simple change, somehow has not been reviewed still, so
it's sitting in the queue...
Yes, apologies - I've been absolutely flat out recently, and I've got a note
to take a look at this and Peter's patch as soon as I can.
Is this fixing an urgent issue with "make check-block" or similar?
It's not urgent since this has been broken forever, but yes, it fixes "make
check-block" for the case where sparc64 is the only available target during
"configure --target-list=sparc64-softmmu" and thus the iotests run with
qemu-system-sparc64.
Thomas
