1 /* SPDX-License-Identifier: GPL-2.0 */
2 /******************************************************************************
3 * Guest OS interface to ARM Xen.
4 *
5 * Stefano Stabellini <stefano.stabellini@eu.citrix.com>, 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 __ASSEMBLY__
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 */
42 typedef uint64_t xen_pfn_t;
43 #define PRI_xen_pfn "llx"
44 typedef uint64_t xen_ulong_t;
45 #define PRI_xen_ulong "llx"
46 typedef 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);
51 DEFINE_GUEST_HANDLE(char);
52 DEFINE_GUEST_HANDLE(int);
53 DEFINE_GUEST_HANDLE(void);
54 DEFINE_GUEST_HANDLE(uint64_t);
55 DEFINE_GUEST_HANDLE(uint32_t);
56 DEFINE_GUEST_HANDLE(xen_pfn_t);
57 DEFINE_GUEST_HANDLE(xen_ulong_t);
58
59 /* Maximum number of virtual CPUs in multi-processor guests. */
60 #define MAX_VIRT_CPUS 1
61
62 struct arch_vcpu_info { };
63 struct arch_shared_info { };
64
65 /* TODO: Move pvclock definitions some place arch independent */
66 struct 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 */
78 struct 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 */
87
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.