HyperCall

hypercall提供xen的上层程序一些类似系统调用的接口,供其对xen进行通信,达到控制硬件的目的,这个过程在linux里被称为系统调用,做个类似的比较

linux	xen
系统调用	hypercall
用户空间	dom空间
系统空间	xen空间

所以我将整个hypercall的过程分为2个部分

xen空间

_hypercall5

xen/include/public/xen.h  /*   * HYPERCALLS   */    #define __HYPERVISOR_set_trap_table 0  #define __HYPERVISOR_mmu_update 1  #define __HYPERVISOR_set_gdt 2  #define __HYPERVISOR_stack_switch 3  #define __HYPERVISOR_set_callbacks 4  #define __HYPERVISOR_fpu_taskswitch 5  #define __HYPERVISOR_sched_op_compat 6 /* compat since 0x00030101 */  #define __HYPERVISOR_platform_op 7  #define __HYPERVISOR_set_debugreg 8  #define __HYPERVISOR_get_debugreg 9  #define __HYPERVISOR_update_descriptor 10  #define __HYPERVISOR_memory_op 12  #define __HYPERVISOR_multicall 13  #define __HYPERVISOR_update_va_mapping 14  #define __HYPERVISOR_set_timer_op 15  #define __HYPERVISOR_event_channel_op_compat 16 /* compat since 0x00030202 */  #define __HYPERVISOR_xen_version 17  #define __HYPERVISOR_console_io 18  #define __HYPERVISOR_physdev_op_compat 19 /* compat since 0x00030202 */  #define __HYPERVISOR_grant_table_op 20  #define __HYPERVISOR_vm_assist 21  #define __HYPERVISOR_update_va_mapping_otherdomain 22  #define __HYPERVISOR_iret 23 /* x86 only */  #define __HYPERVISOR_vcpu_op 24  #define __HYPERVISOR_set_segment_base 25 /* x86/64 only */  #define __HYPERVISOR_mmuext_op 26  #define __HYPERVISOR_xsm_op 27  #define __HYPERVISOR_nmi_op 28  #define __HYPERVISOR_sched_op 29  #define __HYPERVISOR_callback_op 30  #define __HYPERVISOR_xenoprof_op 31  #define __HYPERVISOR_event_channel_op 32  #define __HYPERVISOR_physdev_op 33  #define __HYPERVISOR_hvm_op 34  #define __HYPERVISOR_sysctl 35  #define __HYPERVISOR_domctl 36  #define __HYPERVISOR_kexec_op 37




extras/mini-os/arch/x86/x86_64.S  hypercall_page:   .org 0x3000

dom空间