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From 35ffe28a91a2ef08dd181d1a22695050ccbb6995 Mon Sep 17 00:00:00 2001
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From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
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Date: Mon, 9 Jan 2023 16:04:43 +0000
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Subject: [PATCH 1/2] virtio-rng-pci: fix migration compat for vectors
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RH-Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
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RH-MergeRequest: 131: virtio-rng-pci: fix migration compat for vectors
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RH-Bugzilla: 2155749
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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RH-Commit: [1/1] 1a866491dd191b073d71ae1aa5f4d76ee885de6d (dagrh/c-9-s-qemu-kvm)
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Fixup the migration compatibility for existing machine types
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so that they do not enable msi-x.
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Symptom:
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(qemu) qemu: get_pci_config_device: Bad config data: i=0x34 read: 84 device: 98 cmask: ff wmask: 0 w1cmask:0
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qemu: Failed to load PCIDevice:config
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qemu: Failed to load virtio-rng:virtio
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qemu: error while loading state for instance 0x0 of device '0000:00:03.0/virtio-rng'
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qemu: load of migration failed: Invalid argument
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Note: This fix will break migration from 7.2->7.2-fixed with this patch
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bz: https://bugzilla.redhat.com/show_bug.cgi?id=2155749
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Fixes: 9ea02e8f1 ("virtio-rng-pci: Allow setting nvectors, so we can use MSI-X")
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This downstream fix is the equivalent of an upstream fix I've posted to
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the 7.2 machine type compatibility.
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Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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---
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hw/core/machine.c | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/hw/core/machine.c b/hw/core/machine.c
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index 3d851d34da..7adbac6f87 100644
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--- a/hw/core/machine.c
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+++ b/hw/core/machine.c
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@@ -56,6 +56,8 @@ GlobalProperty hw_compat_rhel_9_1[] = {
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{ "nvme-ns", "eui64-default", "on"},
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/* hw_compat_rhel_9_1 from hw_compat_7_1 */
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{ "virtio-device", "queue_reset", "false" },
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+ /* hw_compat_rhel_9_1 bz 2155749 */
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+ { "virtio-rng-pci", "vectors", "0" },
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};
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const size_t hw_compat_rhel_9_1_len = G_N_ELEMENTS(hw_compat_rhel_9_1);
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--
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2.31.1
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