include/xen/arm/interface.h

   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 */