1204076Spjd/****************************************************************************** 2204076Spjd * xen-x86_32.h 3211877Spjd * 4204076Spjd * Guest OS interface to x86 32-bit Xen. 5204076Spjd * 6204076Spjd * Permission is hereby granted, free of charge, to any person obtaining a copy 7204076Spjd * of this software and associated documentation files (the "Software"), to 8204076Spjd * deal in the Software without restriction, including without limitation the 9204076Spjd * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 10204076Spjd * sell copies of the Software, and to permit persons to whom the Software is 11204076Spjd * furnished to do so, subject to the following conditions: 12204076Spjd * 13204076Spjd * The above copyright notice and this permission notice shall be included in 14204076Spjd * all copies or substantial portions of the Software. 15204076Spjd * 16204076Spjd * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17204076Spjd * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18204076Spjd * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 19204076Spjd * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20204076Spjd * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21204076Spjd * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 22204076Spjd * DEALINGS IN THE SOFTWARE. 23204076Spjd * 24204076Spjd * Copyright (c) 2004-2007, K A Fraser 25204076Spjd */ 26204076Spjd 27204076Spjd#include <sys/param.h> 28204076Spjd#include <sys/types.h> 29204076Spjd 30204076Spjd#ifndef __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__ 31204076Spjd#define __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__ 32204076Spjd 33204076Spjd/* 34204076Spjd * Hypercall interface: 35204076Spjd * Input: %ebx, %ecx, %edx, %esi, %edi (arguments 1-5) 36204076Spjd * Output: %eax 37204076Spjd * Access is via hypercall page (set up by guest loader or via a Xen MSR): 38204076Spjd * call hypercall_page + hypercall-number * 32 39204076Spjd * Clobbered: Argument registers (e.g., 2-arg hypercall clobbers %ebx,%ecx) 40204076Spjd */ 41204076Spjd 42204076Spjd#if __XEN_INTERFACE_VERSION__ < 0x00030203 43204076Spjd/* 44204076Spjd * Legacy hypercall interface: 45213009Spjd * As above, except the entry sequence to the hypervisor is: 46204076Spjd * mov $hypercall-number*32,%eax ; int $0x82 47204076Spjd */ 48204076Spjd#define TRAP_INSTR "int $0x82" 49204076Spjd#endif 50204076Spjd 51204076Spjd/* 52204076Spjd * These flat segments are in the Xen-private section of every GDT. Since these 53204076Spjd * are also present in the initial GDT, many OSes will be able to avoid 54204076Spjd * installing their own GDT. 55204076Spjd */ 56204076Spjd#define FLAT_RING1_CS 0xe019 /* GDT index 259 */ 57212038Spjd#define FLAT_RING1_DS 0xe021 /* GDT index 260 */ 58204076Spjd#define FLAT_RING1_SS 0xe021 /* GDT index 260 */ 59204076Spjd#define FLAT_RING3_CS 0xe02b /* GDT index 261 */ 60204076Spjd#define FLAT_RING3_DS 0xe033 /* GDT index 262 */ 61211977Spjd#define FLAT_RING3_SS 0xe033 /* GDT index 262 */ 62204076Spjd 63204076Spjd#define FLAT_KERNEL_CS FLAT_RING1_CS 64204076Spjd#define FLAT_KERNEL_DS FLAT_RING1_DS 65204076Spjd#define FLAT_KERNEL_SS FLAT_RING1_SS 66204076Spjd#define FLAT_USER_CS FLAT_RING3_CS 67204076Spjd#define FLAT_USER_DS FLAT_RING3_DS 68219864Spjd#define FLAT_USER_SS FLAT_RING3_SS 69219864Spjd 70204076Spjd#define __HYPERVISOR_VIRT_START_PAE 0xF5800000 71204076Spjd#define __MACH2PHYS_VIRT_START_PAE 0xF5800000 72204076Spjd#define __MACH2PHYS_VIRT_END_PAE 0xF6800000 73204076Spjd#define HYPERVISOR_VIRT_START_PAE \ 74204076Spjd mk_unsigned_long(__HYPERVISOR_VIRT_START_PAE) 75204076Spjd#define MACH2PHYS_VIRT_START_PAE \ 76204076Spjd mk_unsigned_long(__MACH2PHYS_VIRT_START_PAE) 77204076Spjd#define MACH2PHYS_VIRT_END_PAE \ 78211984Spjd mk_unsigned_long(__MACH2PHYS_VIRT_END_PAE) 79211984Spjd 80204076Spjd/* Non-PAE bounds are obsolete. */ 81204076Spjd#define __HYPERVISOR_VIRT_START_NONPAE 0xFC000000 82204076Spjd#define __MACH2PHYS_VIRT_START_NONPAE 0xFC000000 83204076Spjd#define __MACH2PHYS_VIRT_END_NONPAE 0xFC400000 84204076Spjd#define HYPERVISOR_VIRT_START_NONPAE \ 85204076Spjd mk_unsigned_long(__HYPERVISOR_VIRT_START_NONPAE) 86204076Spjd#define MACH2PHYS_VIRT_START_NONPAE \ 87204076Spjd mk_unsigned_long(__MACH2PHYS_VIRT_START_NONPAE) 88204076Spjd#define MACH2PHYS_VIRT_END_NONPAE \ 89204076Spjd mk_unsigned_long(__MACH2PHYS_VIRT_END_NONPAE) 90204076Spjd 91204076Spjd#define __HYPERVISOR_VIRT_START __HYPERVISOR_VIRT_START_PAE 92204076Spjd#define __MACH2PHYS_VIRT_START __MACH2PHYS_VIRT_START_PAE 93204076Spjd#define __MACH2PHYS_VIRT_END __MACH2PHYS_VIRT_END_PAE 94204076Spjd 95204076Spjd#ifndef HYPERVISOR_VIRT_START 96204076Spjd#define HYPERVISOR_VIRT_START mk_unsigned_long(__HYPERVISOR_VIRT_START) 97204076Spjd#endif 98204076Spjd 99204076Spjd#define MACH2PHYS_VIRT_START mk_unsigned_long(__MACH2PHYS_VIRT_START) 100204076Spjd#define MACH2PHYS_VIRT_END mk_unsigned_long(__MACH2PHYS_VIRT_END) 101204076Spjd#define MACH2PHYS_NR_ENTRIES ((MACH2PHYS_VIRT_END-MACH2PHYS_VIRT_START)>>2) 102204076Spjd#ifndef machine_to_phys_mapping 103204076Spjd#define machine_to_phys_mapping ((unsigned long *)MACH2PHYS_VIRT_START) 104204076Spjd#endif 105204076Spjd 106204076Spjd/* 32-/64-bit invariability for control interfaces (domctl/sysctl). */ 107204076Spjd#if defined(__XEN__) || defined(__XEN_TOOLS__) 108204076Spjd#undef ___DEFINE_XEN_GUEST_HANDLE 109204076Spjd#define ___DEFINE_XEN_GUEST_HANDLE(name, type) \ 110211877Spjd typedef struct { type *p; } \ 111211877Spjd __guest_handle_ ## name; \ 112211877Spjd typedef struct { union { type *p; uint64_aligned_t q; }; } \ 113211877Spjd __guest_handle_64_ ## name 114211877Spjd#undef set_xen_guest_handle 115211877Spjd#define set_xen_guest_handle(hnd, val) \ 116211877Spjd do { if ( sizeof(hnd) == 8 ) *(uint64_t *)&(hnd) = 0; \ 117211877Spjd (hnd).p = val; \ 118211877Spjd } while ( 0 ) 119211877Spjd#define uint64_aligned_t uint64_t __attribute__((aligned(8))) 120211877Spjd#define __XEN_GUEST_HANDLE_64(name) __guest_handle_64_ ## name 121211877Spjd#define XEN_GUEST_HANDLE_64(name) __XEN_GUEST_HANDLE_64(name) 122211877Spjd#endif 123211877Spjd 124211877Spjd#ifndef __ASSEMBLY__ 125211877Spjd 126211877Spjdstruct cpu_user_regs { 127211877Spjd uint32_t ebx; 128211877Spjd uint32_t ecx; 129211877Spjd uint32_t edx; 130204076Spjd uint32_t esi; 131204076Spjd uint32_t edi; 132204076Spjd uint32_t ebp; 133204076Spjd uint32_t eax; 134204076Spjd uint16_t error_code; /* private */ 135204076Spjd uint16_t entry_vector; /* private */ 136204076Spjd uint32_t eip; 137204076Spjd uint16_t cs; 138204076Spjd uint8_t saved_upcall_mask; 139204076Spjd uint8_t _pad0; 140204076Spjd uint32_t eflags; /* eflags.IF == !saved_upcall_mask */ 141204076Spjd uint32_t esp; 142204076Spjd uint16_t ss, _pad1; 143204076Spjd uint16_t es, _pad2; 144204076Spjd uint16_t ds, _pad3; 145204076Spjd uint16_t fs, _pad4; 146204076Spjd uint16_t gs, _pad5; 147204076Spjd}; 148204076Spjdtypedef struct cpu_user_regs cpu_user_regs_t; 149204076SpjdDEFINE_XEN_GUEST_HANDLE(cpu_user_regs_t); 150204076Spjd 151204076Spjd/* 152204076Spjd * Page-directory addresses above 4GB do not fit into architectural %cr3. 153204076Spjd * When accessing %cr3, or equivalent field in vcpu_guest_context, guests 154204076Spjd * must use the following accessor macros to pack/unpack valid MFNs. 155210879Spjd */ 156210879Spjd#define xen_pfn_to_cr3(pfn) (((unsigned)(pfn) << 12) | ((unsigned)(pfn) >> 20)) 157210879Spjd#define xen_cr3_to_pfn(cr3) (((unsigned)(cr3) >> 12) | ((unsigned)(cr3) << 20)) 158204076Spjd 159204076Spjdstruct arch_vcpu_info { 160204076Spjd unsigned long cr2; 161204076Spjd unsigned long pad[5]; /* sizeof(vcpu_info_t) == 64 */ 162210879Spjd}; 163210879Spjdtypedef struct arch_vcpu_info arch_vcpu_info_t; 164210879Spjd 165204076Spjdstruct xen_callback { 166204076Spjd unsigned long cs; 167204076Spjd unsigned long eip; 168204076Spjd}; 169204076Spjdtypedef struct xen_callback xen_callback_t; 170204076Spjd 171204076Spjd#endif /* !__ASSEMBLY__ */ 172204076Spjd 173204076Spjd#endif /* __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__ */ 174204076Spjd 175204076Spjd/* 176204076Spjd * Local variables: 177204076Spjd * mode: C 178204076Spjd * c-set-style: "BSD" 179204076Spjd * c-basic-offset: 4 180204076Spjd * tab-width: 4 181204076Spjd * indent-tabs-mode: nil 182204076Spjd * End: 183204076Spjd */ 184204076Spjd