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virtio-balloon-pci: Allow setting nvectors, so we can use MSI-X

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Most virtio-pci devices allow MSI-X. Add it to virtio-balloon-pci, but
only enable it in new machine types, so we don't break migration of
existing machine types between different qemu versions.

This copies what was done for virtio-rng-pci in:
9ea02e8f13 ("virtio-rng-pci: Allow setting nvectors, so we can use MSI-X")
bad9c5a516 ("virtio-rng-pci: fix migration compat for vectors")
62bdb88715 ("virtio-rng-pci: fix transitional migration compat for vectors")

Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Reza Arbab <arbab@linux.ibm.com>
Tested-by: Mario Casquero <mcasquer@redhat.com>
Message-ID: <20250115161425.246348-1-arbab@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Reza Arbab 2025-01-15 10:14:25 -06:00 • committed by Thomas Huth
parent a4cda3f5df
commit fe638ae67b
2 changed files with 15 additions and 0 deletions
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3
hw/core/machine.c
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@ -38,6 +38,9 @@
GlobalProperty hw_compat_9_2[] = {
{"arm-cpu", "backcompat-pauth-default-use-qarma5", "true"},
{ "virtio-balloon-pci", "vectors", "0" },
{ "virtio-balloon-pci-transitional", "vectors", "0" },
{ "virtio-balloon-pci-non-transitional", "vectors", "0" },
};
const size_t hw_compat_9_2_len = G_N_ELEMENTS(hw_compat_9_2);