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Annotation of Gnu-Mach/xen/public/arch-x86/xen.h, revision 1.1

1.1     ! root        1: /******************************************************************************
        !             2:  * arch-x86/xen.h
        !             3:  * 
        !             4:  * Guest OS interface to x86 Xen.
        !             5:  * 
        !             6:  * Permission is hereby granted, free of charge, to any person obtaining a copy
        !             7:  * of this software and associated documentation files (the "Software"), to
        !             8:  * deal in the Software without restriction, including without limitation the
        !             9:  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
        !            10:  * sell copies of the Software, and to permit persons to whom the Software is
        !            11:  * furnished to do so, subject to the following conditions:
        !            12:  *
        !            13:  * The above copyright notice and this permission notice shall be included in
        !            14:  * all copies or substantial portions of the Software.
        !            15:  *
        !            16:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
        !            17:  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
        !            19:  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
        !            20:  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
        !            21:  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
        !            22:  * DEALINGS IN THE SOFTWARE.
        !            23:  *
        !            24:  * Copyright (c) 2004-2006, K A Fraser
        !            25:  */
        !            26: 
        !            27: #include "../xen.h"
        !            28: 
        !            29: #ifndef __XEN_PUBLIC_ARCH_X86_XEN_H__
        !            30: #define __XEN_PUBLIC_ARCH_X86_XEN_H__
        !            31: 
        !            32: /* Structural guest handles introduced in 0x00030201. */
        !            33: #if __XEN_INTERFACE_VERSION__ >= 0x00030201
        !            34: #define ___DEFINE_XEN_GUEST_HANDLE(name, type) \
        !            35:     typedef struct { type *p; } __guest_handle_ ## name
        !            36: #else
        !            37: #define ___DEFINE_XEN_GUEST_HANDLE(name, type) \
        !            38:     typedef type * __guest_handle_ ## name
        !            39: #endif
        !            40: 
        !            41: #define __DEFINE_XEN_GUEST_HANDLE(name, type) \
        !            42:     ___DEFINE_XEN_GUEST_HANDLE(name, type);   \
        !            43:     ___DEFINE_XEN_GUEST_HANDLE(const_##name, const type)
        !            44: #define DEFINE_XEN_GUEST_HANDLE(name)   __DEFINE_XEN_GUEST_HANDLE(name, name)
        !            45: #define __XEN_GUEST_HANDLE(name)        __guest_handle_ ## name
        !            46: #define XEN_GUEST_HANDLE(name)          __XEN_GUEST_HANDLE(name)
        !            47: #define set_xen_guest_handle(hnd, val)  do { (hnd).p = val; } while (0)
        !            48: #ifdef __XEN_TOOLS__
        !            49: #define get_xen_guest_handle(val, hnd)  do { val = (hnd).p; } while (0)
        !            50: #endif
        !            51: 
        !            52: #if defined(__i386__)
        !            53: #include "xen-x86_32.h"
        !            54: #elif defined(__x86_64__)
        !            55: #include "xen-x86_64.h"
        !            56: #endif
        !            57: 
        !            58: #ifndef __ASSEMBLY__
        !            59: typedef unsigned long xen_pfn_t;
        !            60: #define PRI_xen_pfn "lx"
        !            61: #endif
        !            62: 
        !            63: /*
        !            64:  * SEGMENT DESCRIPTOR TABLES
        !            65:  */
        !            66: /*
        !            67:  * A number of GDT entries are reserved by Xen. These are not situated at the
        !            68:  * start of the GDT because some stupid OSes export hard-coded selector values
        !            69:  * in their ABI. These hard-coded values are always near the start of the GDT,
        !            70:  * so Xen places itself out of the way, at the far end of the GDT.
        !            71:  */
        !            72: #define FIRST_RESERVED_GDT_PAGE  14
        !            73: #define FIRST_RESERVED_GDT_BYTE  (FIRST_RESERVED_GDT_PAGE * 4096)
        !            74: #define FIRST_RESERVED_GDT_ENTRY (FIRST_RESERVED_GDT_BYTE / 8)
        !            75: 
        !            76: /* Maximum number of virtual CPUs in multi-processor guests. */
        !            77: #define MAX_VIRT_CPUS 32
        !            78: 
        !            79: 
        !            80: /* Machine check support */
        !            81: #include "xen-mca.h"
        !            82: 
        !            83: #ifndef __ASSEMBLY__
        !            84: 
        !            85: typedef unsigned long xen_ulong_t;
        !            86: 
        !            87: /*
        !            88:  * Send an array of these to HYPERVISOR_set_trap_table().
        !            89:  * The privilege level specifies which modes may enter a trap via a software
        !            90:  * interrupt. On x86/64, since rings 1 and 2 are unavailable, we allocate
        !            91:  * privilege levels as follows:
        !            92:  *  Level == 0: Noone may enter
        !            93:  *  Level == 1: Kernel may enter
        !            94:  *  Level == 2: Kernel may enter
        !            95:  *  Level == 3: Everyone may enter
        !            96:  */
        !            97: #define TI_GET_DPL(_ti)      ((_ti)->flags & 3)
        !            98: #define TI_GET_IF(_ti)       ((_ti)->flags & 4)
        !            99: #define TI_SET_DPL(_ti,_dpl) ((_ti)->flags |= (_dpl))
        !           100: #define TI_SET_IF(_ti,_if)   ((_ti)->flags |= ((!!(_if))<<2))
        !           101: struct trap_info {
        !           102:     uint8_t       vector;  /* exception vector                              */
        !           103:     uint8_t       flags;   /* 0-3: privilege level; 4: clear event enable?  */
        !           104:     uint16_t      cs;      /* code selector                                 */
        !           105:     unsigned long address; /* code offset                                   */
        !           106: };
        !           107: typedef struct trap_info trap_info_t;
        !           108: DEFINE_XEN_GUEST_HANDLE(trap_info_t);
        !           109: 
        !           110: typedef uint64_t tsc_timestamp_t; /* RDTSC timestamp */
        !           111: 
        !           112: /*
        !           113:  * The following is all CPU context. Note that the fpu_ctxt block is filled 
        !           114:  * in by FXSAVE if the CPU has feature FXSR; otherwise FSAVE is used.
        !           115:  */
        !           116: struct vcpu_guest_context {
        !           117:     /* FPU registers come first so they can be aligned for FXSAVE/FXRSTOR. */
        !           118:     struct { char x[512]; } fpu_ctxt;       /* User-level FPU registers     */
        !           119: #define VGCF_I387_VALID                (1<<0)
        !           120: #define VGCF_IN_KERNEL                 (1<<2)
        !           121: #define _VGCF_i387_valid               0
        !           122: #define VGCF_i387_valid                (1<<_VGCF_i387_valid)
        !           123: #define _VGCF_in_kernel                2
        !           124: #define VGCF_in_kernel                 (1<<_VGCF_in_kernel)
        !           125: #define _VGCF_failsafe_disables_events 3
        !           126: #define VGCF_failsafe_disables_events  (1<<_VGCF_failsafe_disables_events)
        !           127: #define _VGCF_syscall_disables_events  4
        !           128: #define VGCF_syscall_disables_events   (1<<_VGCF_syscall_disables_events)
        !           129: #define _VGCF_online                   5
        !           130: #define VGCF_online                    (1<<_VGCF_online)
        !           131:     unsigned long flags;                    /* VGCF_* flags                 */
        !           132:     struct cpu_user_regs user_regs;         /* User-level CPU registers     */
        !           133:     struct trap_info trap_ctxt[256];        /* Virtual IDT                  */
        !           134:     unsigned long ldt_base, ldt_ents;       /* LDT (linear address, # ents) */
        !           135:     unsigned long gdt_frames[16], gdt_ents; /* GDT (machine frames, # ents) */
        !           136:     unsigned long kernel_ss, kernel_sp;     /* Virtual TSS (only SS1/SP1)   */
        !           137:     /* NB. User pagetable on x86/64 is placed in ctrlreg[1]. */
        !           138:     unsigned long ctrlreg[8];               /* CR0-CR7 (control registers)  */
        !           139:     unsigned long debugreg[8];              /* DB0-DB7 (debug registers)    */
        !           140: #ifdef __i386__
        !           141:     unsigned long event_callback_cs;        /* CS:EIP of event callback     */
        !           142:     unsigned long event_callback_eip;
        !           143:     unsigned long failsafe_callback_cs;     /* CS:EIP of failsafe callback  */
        !           144:     unsigned long failsafe_callback_eip;
        !           145: #else
        !           146:     unsigned long event_callback_eip;
        !           147:     unsigned long failsafe_callback_eip;
        !           148: #ifdef __XEN__
        !           149:     union {
        !           150:         unsigned long syscall_callback_eip;
        !           151:         struct {
        !           152:             unsigned int event_callback_cs;    /* compat CS of event cb     */
        !           153:             unsigned int failsafe_callback_cs; /* compat CS of failsafe cb  */
        !           154:         };
        !           155:     };
        !           156: #else
        !           157:     unsigned long syscall_callback_eip;
        !           158: #endif
        !           159: #endif
        !           160:     unsigned long vm_assist;                /* VMASST_TYPE_* bitmap */
        !           161: #ifdef __x86_64__
        !           162:     /* Segment base addresses. */
        !           163:     uint64_t      fs_base;
        !           164:     uint64_t      gs_base_kernel;
        !           165:     uint64_t      gs_base_user;
        !           166: #endif
        !           167: };
        !           168: typedef struct vcpu_guest_context vcpu_guest_context_t;
        !           169: DEFINE_XEN_GUEST_HANDLE(vcpu_guest_context_t);
        !           170: 
        !           171: struct arch_shared_info {
        !           172:     unsigned long max_pfn;                  /* max pfn that appears in table */
        !           173:     /* Frame containing list of mfns containing list of mfns containing p2m. */
        !           174:     xen_pfn_t     pfn_to_mfn_frame_list_list;
        !           175:     unsigned long nmi_reason;
        !           176:     uint64_t pad[32];
        !           177: };
        !           178: typedef struct arch_shared_info arch_shared_info_t;
        !           179: 
        !           180: #endif /* !__ASSEMBLY__ */
        !           181: 
        !           182: /*
        !           183:  * Prefix forces emulation of some non-trapping instructions.
        !           184:  * Currently only CPUID.
        !           185:  */
        !           186: #ifdef __ASSEMBLY__
        !           187: #define XEN_EMULATE_PREFIX .byte 0x0f,0x0b,0x78,0x65,0x6e ;
        !           188: #define XEN_CPUID          XEN_EMULATE_PREFIX cpuid
        !           189: #else
        !           190: #define XEN_EMULATE_PREFIX ".byte 0x0f,0x0b,0x78,0x65,0x6e ; "
        !           191: #define XEN_CPUID          XEN_EMULATE_PREFIX "cpuid"
        !           192: #endif
        !           193: 
        !           194: #endif /* __XEN_PUBLIC_ARCH_X86_XEN_H__ */
        !           195: 
        !           196: /*
        !           197:  * Local variables:
        !           198:  * mode: C
        !           199:  * c-set-style: "BSD"
        !           200:  * c-basic-offset: 4
        !           201:  * tab-width: 4
        !           202:  * indent-tabs-mode: nil
        !           203:  * End:
        !           204:  */

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