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