1 /******************************************************************************
4 * Xen hypercall wrappers
6 * Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Citrix, 2012
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License version 2
10 * as published by the Free Software Foundation; or, when distributed
11 * separately from the Linux kernel or incorporated into other
12 * software packages, subject to the following license:
14 * Permission is hereby granted, free of charge, to any person obtaining a copy
15 * of this source file (the "Software"), to deal in the Software without
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25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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34 * The Xen hypercall calling convention is very similar to the procedure
35 * call standard for the ARM 64-bit architecture: the first parameter is
36 * passed in x0, the second in x1, the third in x2, the fourth in x3 and
39 * The hypercall number is passed in x16.
41 * The return value is in x0.
43 * The hvc ISS is required to be 0xEA1, that is the Xen specific ARM
46 * Parameter structs passed to hypercalls are laid out according to
47 * the ARM 64-bit EABI standard.
50 #include <linux/linkage.h>
51 #include <asm/assembler.h>
52 #include <xen/interface/xen.h>
57 #define HYPERCALL_SIMPLE(hypercall) \
58 ENTRY(HYPERVISOR_##hypercall) \
59 mov x16, #__HYPERVISOR_##hypercall; \
62 ENDPROC(HYPERVISOR_##hypercall)
64 #define HYPERCALL0 HYPERCALL_SIMPLE
65 #define HYPERCALL1 HYPERCALL_SIMPLE
66 #define HYPERCALL2 HYPERCALL_SIMPLE
67 #define HYPERCALL3 HYPERCALL_SIMPLE
68 #define HYPERCALL4 HYPERCALL_SIMPLE
69 #define HYPERCALL5 HYPERCALL_SIMPLE
73 HYPERCALL2(xen_version);
74 HYPERCALL3(console_io);
75 HYPERCALL3(grant_table_op);
77 HYPERCALL2(event_channel_op);
79 HYPERCALL2(memory_op);
80 HYPERCALL2(physdev_op);
83 HYPERCALL2(multicall);
94 ENDPROC(privcmd_call);