87 lines · c
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, 20126 */7 8#ifndef _ASM_ARM_XEN_INTERFACE_H9#define _ASM_ARM_XEN_INTERFACE_H10 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_ ## name18 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_ ## name23 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_op32 33#ifndef __ASSEMBLY__34/* Explicitly size integers that represent pfns in the interface with35 * 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 of37 * representing pfn's which the guest cannot represent in its own pfn38 * type. However since pfn space is controlled by the guest this is39 * fine since it simply wouldn't be able to create any sure pfns in40 * 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 161 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#endif85 86#endif /* _ASM_ARM_XEN_INTERFACE_H */87