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1/* SPDX-License-Identifier: GPL-2.0 */
2/******************************************************************************
3 * Guest OS interface to ARM Xen.
4 *
5 * Stefano Stabellini <[email protected]>, Citrix, 2012
6 */
7
8#ifndef _ASM_ARM_XEN_INTERFACE_H
9#define _ASM_ARM_XEN_INTERFACE_H
10
11#include <linux/types.h>
12
13#define uint64_aligned_t uint64_t __attribute__((aligned(8)))
14
15#define __DEFINE_GUEST_HANDLE(name, type) \
16 typedef struct { union { type *p; uint64_aligned_t q; }; } \
17 __guest_handle_ ## name
18
19#define DEFINE_GUEST_HANDLE_STRUCT(name) \
20 __DEFINE_GUEST_HANDLE(name, struct name)
21#define DEFINE_GUEST_HANDLE(name) __DEFINE_GUEST_HANDLE(name, name)
22#define GUEST_HANDLE(name) __guest_handle_ ## name
23
24#define set_xen_guest_handle(hnd, val) \
25 do { \
26 if (sizeof(hnd) == 8) \
27 *(uint64_t *)&(hnd) = 0; \
28 (hnd).p = val; \
29 } while (0)
30
31#define __HYPERVISOR_platform_op_raw __HYPERVISOR_platform_op
32
33#ifndef __ASSEMBLER__
34/* Explicitly size integers that represent pfns in the interface with
35 * Xen so that we can have one ABI that works for 32 and 64 bit guests.
36 * Note that this means that the xen_pfn_t type may be capable of
37 * representing pfn's which the guest cannot represent in its own pfn
38 * type. However since pfn space is controlled by the guest this is
39 * fine since it simply wouldn't be able to create any sure pfns in
40 * the first place.
41 */
42typedef uint64_t xen_pfn_t;
43#define PRI_xen_pfn "llx"
44typedef uint64_t xen_ulong_t;
45#define PRI_xen_ulong "llx"
46typedef int64_t xen_long_t;
47#define PRI_xen_long "llx"
48/* Guest handles for primitive C types. */
49__DEFINE_GUEST_HANDLE(uchar, unsigned char);
50__DEFINE_GUEST_HANDLE(uint, unsigned int);
51DEFINE_GUEST_HANDLE(char);
52DEFINE_GUEST_HANDLE(int);
53DEFINE_GUEST_HANDLE(void);
54DEFINE_GUEST_HANDLE(uint64_t);
55DEFINE_GUEST_HANDLE(uint32_t);
56DEFINE_GUEST_HANDLE(xen_pfn_t);
57DEFINE_GUEST_HANDLE(xen_ulong_t);
58
59/* Maximum number of virtual CPUs in multi-processor guests. */
60#define MAX_VIRT_CPUS 1
61
62struct arch_vcpu_info { };
63struct arch_shared_info { };
64
65/* TODO: Move pvclock definitions some place arch independent */
66struct pvclock_vcpu_time_info {
67 u32 version;
68 u32 pad0;
69 u64 tsc_timestamp;
70 u64 system_time;
71 u32 tsc_to_system_mul;
72 s8 tsc_shift;
73 u8 flags;
74 u8 pad[2];
75} __attribute__((__packed__)); /* 32 bytes */
76
77/* It is OK to have a 12 bytes struct with no padding because it is packed */
78struct pvclock_wall_clock {
79 u32 version;
80 u32 sec;
81 u32 nsec;
82 u32 sec_hi;
83} __attribute__((__packed__));
84#endif
85
86#endif /* _ASM_ARM_XEN_INTERFACE_H */