48c307550a
between QEMU less than 7.2 and QEMU 7.2 without the fix (both directions are affected). As mentioned in the patch message, this fix itself will break migration between QEMU 7.2 and QEMU 7.2 with the fix (in both directions, if a virtio-rng device is attached), but this is fine, because no pve-qemu-kvm package with QEMU 7.2 has been publicly released yet. Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
43 lines
1.5 KiB
Diff
43 lines
1.5 KiB
Diff
From 0000000000000000000000000000000000000000 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 10:58:09 +0000
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Subject: [PATCH] virtio-rng-pci: fix migration compat for vectors
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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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Reviewed-by: Thomas Huth <thuth@redhat.com>
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Acked-by: David Daney <david.daney@fungible.com>
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Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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(picked-up from https://lists.nongnu.org/archive/html/qemu-devel/2023-01/msg01319.html)
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Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
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---
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hw/core/machine.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/hw/core/machine.c b/hw/core/machine.c
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index 8d34caa31d..77a0a131d1 100644
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--- a/hw/core/machine.c
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+++ b/hw/core/machine.c
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@@ -42,6 +42,7 @@
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GlobalProperty hw_compat_7_1[] = {
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{ "virtio-device", "queue_reset", "false" },
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+ { "virtio-rng-pci", "vectors", "0" },
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};
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const size_t hw_compat_7_1_len = G_N_ELEMENTS(hw_compat_7_1);
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