/****************************************************************************** * arch-x86/xen.h * * Guest OS interface to x86 Xen. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to * deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or * sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * * Copyright (c) 2004-2006, K A Fraser */ #ifndef __XEN_PUBLIC_ARCH_X86_XEN_H__ #define __XEN_PUBLIC_ARCH_X86_XEN_H__ /* Structural guest handles introduced in 0x00030201. */ #if __XEN_INTERFACE_VERSION__ >= 0x00030201 #define __DEFINE_XEN_GUEST_HANDLE(name, type) \ typedef struct { type *p; } __guest_handle_ ## name #else #define __DEFINE_XEN_GUEST_HANDLE(name, type) \ typedef type * __guest_handle_ ## name #endif #define DEFINE_XEN_GUEST_HANDLE(name) __DEFINE_XEN_GUEST_HANDLE(name, name) #define XEN_GUEST_HANDLE(name) __guest_handle_ ## name #define set_xen_guest_handle(hnd, val) do { (hnd).p = val; } while (0) /* * XXPV - we need get in privcmd * #ifdef __XEN_TOOLS__ */ #define get_xen_guest_handle(val, hnd) do { val = (hnd).p; } while (0) /* * #endif */ #ifndef __ASSEMBLY__ /* Guest handles for primitive C types. */ __DEFINE_XEN_GUEST_HANDLE(uchar, unsigned char); __DEFINE_XEN_GUEST_HANDLE(uint, unsigned int); __DEFINE_XEN_GUEST_HANDLE(ulong, unsigned long); DEFINE_XEN_GUEST_HANDLE(char); DEFINE_XEN_GUEST_HANDLE(int); DEFINE_XEN_GUEST_HANDLE(long); DEFINE_XEN_GUEST_HANDLE(void); typedef unsigned long xen_pfn_t; DEFINE_XEN_GUEST_HANDLE(xen_pfn_t); #endif #if defined(__i386__) #include "xen-x86_32.h" #elif defined(__x86_64__) #include "xen-x86_64.h" #endif /* * SEGMENT DESCRIPTOR TABLES */ /* * A number of GDT entries are reserved by Xen. These are not situated at the * start of the GDT because some stupid OSes export hard-coded selector values * in their ABI. These hard-coded values are always near the start of the GDT, * so Xen places itself out of the way, at the far end of the GDT. */ #define FIRST_RESERVED_GDT_PAGE 14 #define FIRST_RESERVED_GDT_BYTE (FIRST_RESERVED_GDT_PAGE * 4096) #define FIRST_RESERVED_GDT_ENTRY (FIRST_RESERVED_GDT_BYTE / 8) /* Maximum number of virtual CPUs in multi-processor guests. */ #define MAX_VIRT_CPUS 32 #ifndef __ASSEMBLY__ typedef unsigned long xen_ulong_t; /* * Send an array of these to HYPERVISOR_set_trap_table(). * The privilege level specifies which modes may enter a trap via a software * interrupt. On x86/64, since rings 1 and 2 are unavailable, we allocate * privilege levels as follows: * Level == 0: Noone may enter * Level == 1: Kernel may enter * Level == 2: Kernel may enter * Level == 3: Everyone may enter */ #define TI_GET_DPL(_ti) ((_ti)->flags & 3) #define TI_GET_IF(_ti) ((_ti)->flags & 4) #define TI_SET_DPL(_ti,_dpl) ((_ti)->flags |= (_dpl)) #define TI_SET_IF(_ti,_if) ((_ti)->flags |= ((!!(_if))<<2)) struct trap_info { uint8_t vector; /* exception vector */ uint8_t flags; /* 0-3: privilege level; 4: clear event enable? */ uint16_t cs; /* code selector */ unsigned long address; /* code offset */ }; typedef struct trap_info trap_info_t; DEFINE_XEN_GUEST_HANDLE(trap_info_t); typedef uint64_t tsc_timestamp_t; /* RDTSC timestamp */ /* * The following is all CPU context. Note that the fpu_ctxt block is filled * in by FXSAVE if the CPU has feature FXSR; otherwise FSAVE is used. */ struct vcpu_guest_context { /* FPU registers come first so they can be aligned for FXSAVE/FXRSTOR. */ struct { char x[512]; } fpu_ctxt; /* User-level FPU registers */ #define VGCF_I387_VALID (1<<0) #define VGCF_IN_KERNEL (1<<2) #define _VGCF_i387_valid 0 #define VGCF_i387_valid (1<<_VGCF_i387_valid) #define _VGCF_in_kernel 2 #define VGCF_in_kernel (1<<_VGCF_in_kernel) #define _VGCF_failsafe_disables_events 3 #define VGCF_failsafe_disables_events (1<<_VGCF_failsafe_disables_events) #define _VGCF_syscall_disables_events 4 #define VGCF_syscall_disables_events (1<<_VGCF_syscall_disables_events) unsigned long flags; /* VGCF_* flags */ struct cpu_user_regs user_regs; /* User-level CPU registers */ struct trap_info trap_ctxt[256]; /* Virtual IDT */ unsigned long ldt_base, ldt_ents; /* LDT (linear address, # ents) */ unsigned long gdt_frames[16], gdt_ents; /* GDT (machine frames, # ents) */ unsigned long kernel_ss, kernel_sp; /* Virtual TSS (only SS1/SP1) */ unsigned long ctrlreg[8]; /* CR0-CR7 (control registers) */ unsigned long debugreg[8]; /* DB0-DB7 (debug registers) */ #ifdef __i386__ unsigned long event_callback_cs; /* CS:EIP of event callback */ unsigned long event_callback_eip; unsigned long failsafe_callback_cs; /* CS:EIP of failsafe callback */ unsigned long failsafe_callback_eip; #else unsigned long event_callback_eip; unsigned long failsafe_callback_eip; unsigned long syscall_callback_eip; #endif unsigned long vm_assist; /* VMASST_TYPE_* bitmap */ #ifdef __x86_64__ /* Segment base addresses. */ uint64_t fs_base; uint64_t gs_base_kernel; uint64_t gs_base_user; #endif }; typedef struct vcpu_guest_context vcpu_guest_context_t; DEFINE_XEN_GUEST_HANDLE(vcpu_guest_context_t); struct arch_shared_info { unsigned long max_pfn; /* max pfn that appears in table */ /* Frame containing list of mfns containing list of mfns containing p2m. */ xen_pfn_t pfn_to_mfn_frame_list_list; unsigned long nmi_reason; uint64_t pad[32]; }; typedef struct arch_shared_info arch_shared_info_t; typedef struct panic_regs panic_regs_t; struct panic_info { int pi_version; /* panic_info format version */ panic_regs_t *pi_regs; /* register state */ void *pi_apic; /* local APIC address */ char *pi_panicstr; /* panic message */ void *pi_ram_start; /* Start of all-RAM mapping region */ void *pi_ram_end; /* End of all-RAM mapping region */ void *pi_stktop; /* Top of current Xen stack */ struct domain *pi_domain; /* Panicking domain */ struct vcpu *pi_vcpu; /* Panicking vcpu */ int pi_dom0cpu; /* cpu number - if a dom0 panic */ }; struct panic_frame { unsigned long pf_fp; unsigned long pf_pc; }; #define PANIC_INFO_VERSION 1 #endif /* !__ASSEMBLY__ */ /* * Prefix forces emulation of some non-trapping instructions. * Currently only CPUID. */ #ifdef __ASSEMBLY__ #define XEN_EMULATE_PREFIX .byte 0x0f,0x0b,0x78,0x65,0x6e ; #define XEN_CPUID XEN_EMULATE_PREFIX cpuid #else #define XEN_EMULATE_PREFIX ".byte 0x0f,0x0b,0x78,0x65,0x6e ; " #define XEN_CPUID XEN_EMULATE_PREFIX "cpuid" #endif #endif /* __XEN_PUBLIC_ARCH_X86_XEN_H__ */ /* * Local variables: * mode: C * c-set-style: "BSD" * c-basic-offset: 4 * tab-width: 4 * indent-tabs-mode: nil * End: */