LXR linux/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 */
  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 */
  87