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i386/kvm: Add xen-version KVM accelerator property and init KVM Xen support

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This just initializes the basic Xen support in KVM for now. Only permitted
on TYPE_PC_MACHINE because that's where the sysbus devices for Xen heap
overlay, event channel, grant tables and other stuff will exist. There's
no point having the basic hypercall support if nothing else works.

Provide sysemu/kvm_xen.h and a kvm_xen_get_caps() which will be used
later by support devices.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
This commit is contained in:
David Woodhouse 2022-12-03 09:51:13 -08:00
parent faa4e80071
commit 61491cf441
7 changed files with 161 additions and 0 deletions
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accel/kvm/kvm-all.c
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@ -3703,6 +3703,7 @@ static void kvm_accel_instance_init(Object *obj)
s->kvm_dirty_ring_size = 0;
s->notify_vmexit = NOTIFY_VMEXIT_OPTION_RUN;
s->notify_window = 0;
s->xen_version = 0;
}
/**