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authorEduardo Habkost2013-01-17 21:59:29 +0100
committerAndreas Färber2013-01-27 14:34:26 +0100
commit2969475869a6f33b8883c2fbf90252dcf617902e (patch)
treee5e8b8cfcb76c5633000f2b6ee61668ec80e8b0c /target-i386/kvm.c
parenttarget-i386: Don't set any KVM flag by default if KVM is disabled (diff)
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pc: Reverse pc_init_pci() compatibility logic
Currently, the pc-1.4 machine init function enables PV EOI and then calls the pc-1.2 machine init function. The problem with this approach is that now we can't enable any additional compatibility code inside the pc-1.2 init function because it would end up enabling the compatibility behavior on pc-1.3 and pc-1.4 as well. This reverses the logic so that the pc-1.2 machine init function will disable PV EOI, and then call the pc-1.4 machine init function. This way we can change older machine-types to enable compatibility behavior, and the newer machine-types (pc-1.3, pc-q35-1.4 and pc-i440fx-1.4) would just use the default behavior. (This means that one nice side-effect of this change is that pc-q35-1.4 will get PV EOI enabled by default, too) It would be interesting to eventually change pc_init_pci_no_kvmclock() and pc_init_isa() to reuse pc_init_pci_1_2() as well (so we don't need to duplicate compatibility code on those two functions). But this will be probably much easier to do after we create a PCInitArgs struct for the PC initialization arguments, and/or after we use global-properties to implement the compatibility modes present in pc_init_pci_1_2(). Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
Diffstat (limited to 'target-i386/kvm.c')
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