/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_X86_XEN_INTERFACE_64_H #define _ASM_X86_XEN_INTERFACE_64_H /* * 64-bit segment selectors * These flat segments are in the Xen-private section of every GDT. Since these * are also present in the initial GDT, many OSes will be able to avoid * installing their own GDT. */ #define FLAT_RING3_CS32 … #define FLAT_RING3_CS64 … #define FLAT_RING3_DS32 … #define FLAT_RING3_DS64 … #define FLAT_RING3_SS32 … #define FLAT_RING3_SS64 … #define FLAT_KERNEL_DS64 … #define FLAT_KERNEL_DS32 … #define FLAT_KERNEL_DS … #define FLAT_KERNEL_CS64 … #define FLAT_KERNEL_CS32 … #define FLAT_KERNEL_CS … #define FLAT_KERNEL_SS64 … #define FLAT_KERNEL_SS32 … #define FLAT_KERNEL_SS … #define FLAT_USER_DS64 … #define FLAT_USER_DS32 … #define FLAT_USER_DS … #define FLAT_USER_CS64 … #define FLAT_USER_CS32 … #define FLAT_USER_CS … #define FLAT_USER_SS64 … #define FLAT_USER_SS32 … #define FLAT_USER_SS … #define __HYPERVISOR_VIRT_START … #define __HYPERVISOR_VIRT_END … #define __MACH2PHYS_VIRT_START … #define __MACH2PHYS_VIRT_END … #define __MACH2PHYS_SHIFT … /* * int HYPERVISOR_set_segment_base(unsigned int which, unsigned long base) * @which == SEGBASE_* ; @base == 64-bit base address * Returns 0 on success. */ #define SEGBASE_FS … #define SEGBASE_GS_USER … #define SEGBASE_GS_KERNEL … #define SEGBASE_GS_USER_SEL … /* * int HYPERVISOR_iret(void) * All arguments are on the kernel stack, in the following format. * Never returns if successful. Current kernel context is lost. * The saved CS is mapped as follows: * RING0 -> RING3 kernel mode. * RING1 -> RING3 kernel mode. * RING2 -> RING3 kernel mode. * RING3 -> RING3 user mode. * However RING0 indicates that the guest kernel should return to itself * directly with * orb $3,1*8(%rsp) * iretq * If flags contains VGCF_in_syscall: * Restore RAX, RIP, RFLAGS, RSP. * Discard R11, RCX, CS, SS. * Otherwise: * Restore RAX, R11, RCX, CS:RIP, RFLAGS, SS:RSP. * All other registers are saved on hypercall entry and restored to user. */ /* Guest exited in SYSCALL context? Return to guest with SYSRET? */ #define _VGCF_in_syscall … #define VGCF_in_syscall … #define VGCF_IN_SYSCALL … #ifndef __ASSEMBLY__ struct iret_context { /* Top of stack (%rsp at point of hypercall). */ uint64_t rax, r11, rcx, flags, rip, cs, rflags, rsp, ss; /* Bottom of iret stack frame. */ }; #if defined(__GNUC__) && !defined(__STRICT_ANSI__) /* Anonymous union includes both 32- and 64-bit names (e.g., eax/rax). */ #define __DECL_REG … #else /* Non-gcc sources must always use the proper 64-bit name (e.g., rax). */ #define __DECL_REG … #endif struct cpu_user_regs { uint64_t r15; uint64_t r14; uint64_t r13; uint64_t r12; __DECL_REG(bp); __DECL_REG(bx); uint64_t r11; uint64_t r10; uint64_t r9; uint64_t r8; __DECL_REG(ax); __DECL_REG(cx); __DECL_REG(dx); __DECL_REG(si); __DECL_REG(di); uint32_t error_code; /* private */ uint32_t entry_vector; /* private */ __DECL_REG(ip); uint16_t cs, _pad0[1]; uint8_t saved_upcall_mask; uint8_t _pad1[3]; __DECL_REG(flags); /* rflags.IF == !saved_upcall_mask */ __DECL_REG(sp); uint16_t ss, _pad2[3]; uint16_t es, _pad3[3]; uint16_t ds, _pad4[3]; uint16_t fs, _pad5[3]; /* Non-zero => takes precedence over fs_base. */ uint16_t gs, _pad6[3]; /* Non-zero => takes precedence over gs_base_usr. */ }; DEFINE_GUEST_HANDLE_STRUCT(cpu_user_regs); #undef __DECL_REG #define xen_pfn_to_cr3 … #define xen_cr3_to_pfn … struct arch_vcpu_info { unsigned long cr2; unsigned long pad; /* sizeof(vcpu_info_t) == 64 */ }; typedef unsigned long xen_callback_t; #define XEN_CALLBACK … #endif /* !__ASSEMBLY__ */ #endif /* _ASM_X86_XEN_INTERFACE_64_H */
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