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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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19
target/i386/kvm/xen-emu.h Normal file
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/*
* Xen HVM emulation support in KVM
*
* Copyright © 2019 Oracle and/or its affiliates. All rights reserved.
* Copyright © 2022 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#ifndef QEMU_I386_KVM_XEN_EMU_H
#define QEMU_I386_KVM_XEN_EMU_H
#define XEN_HYPERCALL_MSR 0x40000000
int kvm_xen_init(KVMState *s);
#endif /* QEMU_I386_KVM_XEN_EMU_H */