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bh=rxoPgeh780guSJuCdJ/NuIvP/e7hv349oFSX5BFg9sA=; b=ni7dv4Yag90eeEPyZm4N4tvOtl+L52+6nhMd/s8turk1AVKwx9+MoLXQunk1a1GbXmAxX2 WllwannEuCkYs/k9oOINgrpdJhoScgbupnA+AfeRVuoSPZO9yYidFLpylV69V5P69VOgVl snG8MU896b0K/SqzsxVASx3hN/znSt4= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1716416452; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=rxoPgeh780guSJuCdJ/NuIvP/e7hv349oFSX5BFg9sA=; b=S3aV3m8yXN8DHaW5a/FN0gAUw3RCyw3//HOLj2Pjf5uboxHfcuvwTdY3T+215FIM+5FxRt xpVi2p4o06t8wzCw== From: Fabiano Rosas To: qemu-devel@nongnu.org Cc: Peter Xu , Richard Henderson , Fiona Ebner , Jason Wang Subject: [PULL 7/9] hw/core/machine: move compatibility flags for VirtIO-net USO to machine 8.1 Date: Wed, 22 May 2024 19:20:32 -0300 Message-Id: <20240522222034.4001-8-farosas@suse.de> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20240522222034.4001-1-farosas@suse.de> References: <20240522222034.4001-1-farosas@suse.de> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Spamd-Result: default: False [-2.80 / 50.00]; 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charset="utf-8" From: Fiona Ebner Migration from an 8.2 or 9.0 binary to an 8.1 binary with machine version 8.1 can fail with: > kvm: Features 0x1c0010130afffa7 unsupported. Allowed features: 0x10179bff= fe7 > kvm: Failed to load virtio-net:virtio > kvm: error while loading state for instance 0x0 of device '0000:00:12.0/v= irtio-net' > kvm: load of migration failed: Operation not permitted The series 53da8b5a99 virtio-net: Add support for USO features 9da1684954 virtio-net: Add USO flags to vhost support. f03e0cf63b tap: Add check for USO features 2ab0ec3121 tap: Add USO support to tap device. only landed in QEMU 8.2, so the compatibility flags should be part of machine version 8.1. Moving the flags unfortunately breaks forward migration with machine version 8.1 from a binary without this patch to a binary with this patch. Fixes: 53da8b5a99 ("virtio-net: Add support for USO features") Signed-off-by: Fiona Ebner Reviewed-by: Fabiano Rosas Acked-by: Jason Wang Reviewed-by: Peter Xu Signed-off-by: Fabiano Rosas --- hw/core/machine.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/hw/core/machine.c b/hw/core/machine.c index 8d6dc69f0e..f5dffea33d 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -51,15 +51,15 @@ GlobalProperty hw_compat_8_1[] =3D { { "ramfb", "x-migrate", "off" }, { "vfio-pci-nohotplug", "x-ramfb-migrate", "off" }, { "igb", "x-pcie-flr-init", "off" }, + { TYPE_VIRTIO_NET, "host_uso", "off"}, + { TYPE_VIRTIO_NET, "guest_uso4", "off"}, + { TYPE_VIRTIO_NET, "guest_uso6", "off"}, }; const size_t hw_compat_8_1_len =3D G_N_ELEMENTS(hw_compat_8_1); =20 GlobalProperty hw_compat_8_0[] =3D { { "migration", "multifd-flush-after-each-section", "on"}, { TYPE_PCI_DEVICE, "x-pcie-ari-nextfn-1", "on" }, - { TYPE_VIRTIO_NET, "host_uso", "off"}, - { TYPE_VIRTIO_NET, "guest_uso4", "off"}, - { TYPE_VIRTIO_NET, "guest_uso6", "off"}, }; const size_t hw_compat_8_0_len =3D G_N_ELEMENTS(hw_compat_8_0); =20 --=20 2.35.3