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vmw_pvscsi: Introduce 'x-old-pci-configuration' backword compatability property

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Following the previous patches, which introduced various changes in
pvscsi's pci configuration space (device subsystem id and revision, msi
offset), this patch introduces a boolean property
'x-old-pci-configuration' to pvscsi.

Its default value is false, exposing the above changes in the pci config
space.

Setting 'x-old-pci-configuration' to 'on' preserves the old behavior,
which allows migration to older versions.

Signed-off-by: Shmulik Ladkani <shmulik.ladkani@ravellosystems.com>
Message-Id: <1449994112-7054-4-git-send-email-shmulik.ladkani@ravellosystems.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Shmulik Ladkani 2015-12-13 10:08:29 +02:00 committed by Paolo Bonzini
parent 836fc48cbc
commit 952970ba56
2 changed files with 6 additions and 0 deletions
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2
hw/scsi/vmw_pvscsi.c
View file

@ -1194,6 +1194,8 @@ static const VMStateDescription vmstate_pvscsi = {
static Property pvscsi_properties[] = {
DEFINE_PROP_UINT8("use_msg", PVSCSIState, use_msg, 1),
DEFINE_PROP_BIT("x-old-pci-configuration", PVSCSIState, compat_flags,
PVSCSI_COMPAT_OLD_PCI_CONFIGURATION_BIT, false),
DEFINE_PROP_END_OF_LIST(),
};

4
include/hw/compat.h
View file

@ -6,6 +6,10 @@
.driver = "virtio-blk-device",\
.property = "scsi",\
.value = "true",\
},{\
.driver = "pvscsi",\
.property = "x-old-pci-configuration",\
.value = "on",\
},{\
.driver = "e1000",\
.property = "extra_mac_registers",\