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i386/xen: implement HYPERVISOR_memory_op

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Specifically XENMEM_add_to_physmap with space XENMAPSPACE_shared_info to
allow the guest to set its shared_info page.

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
[dwmw2: Use the xen_overlay device, add compat support]
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
This commit is contained in:
Joao Martins 2018-06-18 12:17:42 -04:00 • committed by David Woodhouse
parent 110a0ea59f
commit fb0fd2ce38
3 changed files with 143 additions and 1 deletions
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27
target/i386/kvm/xen-compat.h Normal file
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/*
* Xen HVM emulation support in KVM
*
* 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_COMPAT_H
#define QEMU_I386_KVM_XEN_COMPAT_H
#include "hw/xen/interface/memory.h"
typedef uint32_t compat_pfn_t;
typedef uint32_t compat_ulong_t;
struct compat_xen_add_to_physmap {
domid_t domid;
uint16_t size;
unsigned int space;
compat_ulong_t idx;
compat_pfn_t gpfn;
};
#endif /* QEMU_I386_XEN_COMPAT_H */