05e4d3169b
Drop double underscores from header guards in arch/x86/include. They are used inconsistently, and are not necessary. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
159 lines
5 KiB
C
159 lines
5 KiB
C
#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 0xe023 /* GDT index 260 */
|
|
#define FLAT_RING3_CS64 0xe033 /* GDT index 261 */
|
|
#define FLAT_RING3_DS32 0xe02b /* GDT index 262 */
|
|
#define FLAT_RING3_DS64 0x0000 /* NULL selector */
|
|
#define FLAT_RING3_SS32 0xe02b /* GDT index 262 */
|
|
#define FLAT_RING3_SS64 0xe02b /* GDT index 262 */
|
|
|
|
#define FLAT_KERNEL_DS64 FLAT_RING3_DS64
|
|
#define FLAT_KERNEL_DS32 FLAT_RING3_DS32
|
|
#define FLAT_KERNEL_DS FLAT_KERNEL_DS64
|
|
#define FLAT_KERNEL_CS64 FLAT_RING3_CS64
|
|
#define FLAT_KERNEL_CS32 FLAT_RING3_CS32
|
|
#define FLAT_KERNEL_CS FLAT_KERNEL_CS64
|
|
#define FLAT_KERNEL_SS64 FLAT_RING3_SS64
|
|
#define FLAT_KERNEL_SS32 FLAT_RING3_SS32
|
|
#define FLAT_KERNEL_SS FLAT_KERNEL_SS64
|
|
|
|
#define FLAT_USER_DS64 FLAT_RING3_DS64
|
|
#define FLAT_USER_DS32 FLAT_RING3_DS32
|
|
#define FLAT_USER_DS FLAT_USER_DS64
|
|
#define FLAT_USER_CS64 FLAT_RING3_CS64
|
|
#define FLAT_USER_CS32 FLAT_RING3_CS32
|
|
#define FLAT_USER_CS FLAT_USER_CS64
|
|
#define FLAT_USER_SS64 FLAT_RING3_SS64
|
|
#define FLAT_USER_SS32 FLAT_RING3_SS32
|
|
#define FLAT_USER_SS FLAT_USER_SS64
|
|
|
|
#define __HYPERVISOR_VIRT_START 0xFFFF800000000000
|
|
#define __HYPERVISOR_VIRT_END 0xFFFF880000000000
|
|
#define __MACH2PHYS_VIRT_START 0xFFFF800000000000
|
|
#define __MACH2PHYS_VIRT_END 0xFFFF804000000000
|
|
|
|
#ifndef HYPERVISOR_VIRT_START
|
|
#define HYPERVISOR_VIRT_START mk_unsigned_long(__HYPERVISOR_VIRT_START)
|
|
#define HYPERVISOR_VIRT_END mk_unsigned_long(__HYPERVISOR_VIRT_END)
|
|
#endif
|
|
|
|
#define MACH2PHYS_VIRT_START mk_unsigned_long(__MACH2PHYS_VIRT_START)
|
|
#define MACH2PHYS_VIRT_END mk_unsigned_long(__MACH2PHYS_VIRT_END)
|
|
#define MACH2PHYS_NR_ENTRIES ((MACH2PHYS_VIRT_END-MACH2PHYS_VIRT_START)>>3)
|
|
#ifndef machine_to_phys_mapping
|
|
#define machine_to_phys_mapping ((unsigned long *)HYPERVISOR_VIRT_START)
|
|
#endif
|
|
|
|
/*
|
|
* 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 0
|
|
#define SEGBASE_GS_USER 1
|
|
#define SEGBASE_GS_KERNEL 2
|
|
#define SEGBASE_GS_USER_SEL 3 /* Set user %gs specified in base[15:0] */
|
|
|
|
/*
|
|
* 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 iteself
|
|
* 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 8
|
|
#define VGCF_in_syscall (1<<_VGCF_in_syscall)
|
|
#define VGCF_IN_SYSCALL 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(name) union { \
|
|
uint64_t r ## name, e ## name; \
|
|
uint32_t _e ## name; \
|
|
}
|
|
#else
|
|
/* Non-gcc sources must always use the proper 64-bit name (e.g., rax). */
|
|
#define __DECL_REG(name) uint64_t r ## name
|
|
#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(pfn) ((unsigned long)(pfn) << 12)
|
|
#define xen_cr3_to_pfn(cr3) ((unsigned long)(cr3) >> 12)
|
|
|
|
struct arch_vcpu_info {
|
|
unsigned long cr2;
|
|
unsigned long pad; /* sizeof(vcpu_info_t) == 64 */
|
|
};
|
|
|
|
typedef unsigned long xen_callback_t;
|
|
|
|
#define XEN_CALLBACK(__cs, __rip) \
|
|
((unsigned long)(__rip))
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
|
|
#endif /* _ASM_X86_XEN_INTERFACE_64_H */
|