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From 8a50b1caa7e56dc2b9a2f4dc8bc9c63e9a064085 Mon Sep 17 00:00:00 2001
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From: Miroslav Rezanina <mrezanin@redhat.com>
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Date: Thu, 26 Apr 2018 02:54:04 +0000
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Subject: Remove rhel6_ctrl_guest_workaround
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As we are not support RHEL 6 compatibility on RHEL 8 removing hack
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to handle missing ctrl-guest-offload in RHEL 6 machine types.
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This hack was introduced for BZ 1378334 (windows guests migration from
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rhel6.8-z to rhel7.3 with virtio-net-pci fail) in qemu-kvm-rhev for RHEL 7.4
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and was backported to qemu-kvm-rhev for RHEL 7.3 as commit 9a30ebb5 (and
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propagated to RHEL 7.4 with rebase to 2.9.0).
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Singed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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hw/virtio/virtio.c | 22 +---------------------
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include/hw/virtio/virtio.h | 1 -
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2 files changed, 1 insertion(+), 22 deletions(-)
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diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
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index 4bcb4f4..006d3d1 100644
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--- a/hw/virtio/virtio.c
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+++ b/hw/virtio/virtio.c
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@@ -24,7 +24,6 @@
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#include "hw/virtio/virtio-access.h"
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#include "sysemu/dma.h"
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-#include "standard-headers/linux/virtio_net.h"
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/*
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* The alignment to use between consumer and producer parts of vring.
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* x86 pagesize again. This is the default, used by transports like PCI
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@@ -1992,24 +1991,7 @@ const VMStateInfo virtio_vmstate_info = {
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static int virtio_set_features_nocheck(VirtIODevice *vdev, uint64_t val)
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{
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VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
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- bool bad;
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- uint64_t ctrl_guest_mask = 1ull << VIRTIO_NET_F_CTRL_GUEST_OFFLOADS;
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-
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- if (vdev->rhel6_ctrl_guest_workaround && (val & ctrl_guest_mask) &&
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- !(vdev->host_features & ctrl_guest_mask)) {
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- /*
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- * This works around a mistake in the definition of the rhel6.[56].0
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- * machinetypes, ctrl-guest-offload was not set in qemu-kvm-rhev for
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- * those machine types, but is set on the rhel6 qemu-kvm-rhev build.
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- * If an incoming rhel6 guest uses it then we need to allow it.
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- * Note: There's a small race where a guest read the flag but didn't
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- * declare it's useage yet.
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- */
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- fprintf(stderr, "RHEL6 ctrl_guest_offload workaround\n");
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- vdev->host_features |= ctrl_guest_mask;
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- }
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-
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- bad = (val & ~(vdev->host_features)) != 0;
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+ bool bad = (val & ~(vdev->host_features)) != 0;
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val &= vdev->host_features;
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if (k->set_features) {
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@@ -2584,8 +2566,6 @@ static void virtio_device_instance_finalize(Object *obj)
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static Property virtio_properties[] = {
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DEFINE_VIRTIO_COMMON_FEATURES(VirtIODevice, host_features),
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- DEFINE_PROP_BOOL("__com.redhat_rhel6_ctrl_guest_workaround", VirtIODevice,
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- rhel6_ctrl_guest_workaround, false),
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DEFINE_PROP_END_OF_LIST(),
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};
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diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
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index 41e13d2..098bdaa 100644
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--- a/include/hw/virtio/virtio.h
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+++ b/include/hw/virtio/virtio.h
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@@ -95,7 +95,6 @@ struct VirtIODevice
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uint8_t device_endian;
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bool use_guest_notifier_mask;
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AddressSpace *dma_as;
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- bool rhel6_ctrl_guest_workaround;
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QLIST_HEAD(, VirtQueue) *vector_queues;
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};
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--
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1.8.3.1
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