Commit a42089dd authored by Jeremy Fitzhardinge's avatar Jeremy Fitzhardinge Committed by Jeremy Fitzhardinge
Browse files

xen: Add Xen interface header files



Add Xen interface header files. These are taken fairly directly from
the Xen tree, but somewhat rearranged to suit the kernel's conventions.

Define macros and inline functions for doing hypercalls into the
hypervisor.
Signed-off-by: default avatarJeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: default avatarIan Pratt <ian.pratt@xensource.com>
Signed-off-by: default avatarChristian Limpach <Christian.Limpach@cl.cam.ac.uk>
Signed-off-by: default avatarChris Wright <chrisw@sous-sol.org>
parent 24037a8b
/******************************************************************************
* hypercall.h
*
* Linux-specific hypervisor handling.
*
* Copyright (c) 2002-2004, K A Fraser
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation; or, when distributed
* separately from the Linux kernel or incorporated into other
* software packages, subject to the following license:
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this source file (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.
*/
#ifndef __HYPERCALL_H__
#define __HYPERCALL_H__
#include <linux/errno.h>
#include <linux/string.h>
#include <xen/interface/xen.h>
#include <xen/interface/sched.h>
#include <xen/interface/physdev.h>
extern struct { char _entry[32]; } hypercall_page[];
#define _hypercall0(type, name) \
({ \
long __res; \
asm volatile ( \
"call %[call]" \
: "=a" (__res) \
: [call] "m" (hypercall_page[__HYPERVISOR_##name]) \
: "memory" ); \
(type)__res; \
})
#define _hypercall1(type, name, a1) \
({ \
long __res, __ign1; \
asm volatile ( \
"call %[call]" \
: "=a" (__res), "=b" (__ign1) \
: "1" ((long)(a1)), \
[call] "m" (hypercall_page[__HYPERVISOR_##name]) \
: "memory" ); \
(type)__res; \
})
#define _hypercall2(type, name, a1, a2) \
({ \
long __res, __ign1, __ign2; \
asm volatile ( \
"call %[call]" \
: "=a" (__res), "=b" (__ign1), "=c" (__ign2) \
: "1" ((long)(a1)), "2" ((long)(a2)), \
[call] "m" (hypercall_page[__HYPERVISOR_##name]) \
: "memory" ); \
(type)__res; \
})
#define _hypercall3(type, name, a1, a2, a3) \
({ \
long __res, __ign1, __ign2, __ign3; \
asm volatile ( \
"call %[call]" \
: "=a" (__res), "=b" (__ign1), "=c" (__ign2), \
"=d" (__ign3) \
: "1" ((long)(a1)), "2" ((long)(a2)), \
"3" ((long)(a3)), \
[call] "m" (hypercall_page[__HYPERVISOR_##name]) \
: "memory" ); \
(type)__res; \
})
#define _hypercall4(type, name, a1, a2, a3, a4) \
({ \
long __res, __ign1, __ign2, __ign3, __ign4; \
asm volatile ( \
"call %[call]" \
: "=a" (__res), "=b" (__ign1), "=c" (__ign2), \
"=d" (__ign3), "=S" (__ign4) \
: "1" ((long)(a1)), "2" ((long)(a2)), \
"3" ((long)(a3)), "4" ((long)(a4)), \
[call] "m" (hypercall_page[__HYPERVISOR_##name]) \
: "memory" ); \
(type)__res; \
})
#define _hypercall5(type, name, a1, a2, a3, a4, a5) \
({ \
long __res, __ign1, __ign2, __ign3, __ign4, __ign5; \
asm volatile ( \
"call %[call]" \
: "=a" (__res), "=b" (__ign1), "=c" (__ign2), \
"=d" (__ign3), "=S" (__ign4), "=D" (__ign5) \
: "1" ((long)(a1)), "2" ((long)(a2)), \
"3" ((long)(a3)), "4" ((long)(a4)), \
"5" ((long)(a5)), \
[call] "m" (hypercall_page[__HYPERVISOR_##name]) \
: "memory" ); \
(type)__res; \
})
static inline int
HYPERVISOR_set_trap_table(struct trap_info *table)
{
return _hypercall1(int, set_trap_table, table);
}
static inline int
HYPERVISOR_mmu_update(struct mmu_update *req, int count,
int *success_count, domid_t domid)
{
return _hypercall4(int, mmu_update, req, count, success_count, domid);
}
static inline int
HYPERVISOR_mmuext_op(struct mmuext_op *op, int count,
int *success_count, domid_t domid)
{
return _hypercall4(int, mmuext_op, op, count, success_count, domid);
}
static inline int
HYPERVISOR_set_gdt(unsigned long *frame_list, int entries)
{
return _hypercall2(int, set_gdt, frame_list, entries);
}
static inline int
HYPERVISOR_stack_switch(unsigned long ss, unsigned long esp)
{
return _hypercall2(int, stack_switch, ss, esp);
}
static inline int
HYPERVISOR_set_callbacks(unsigned long event_selector,
unsigned long event_address,
unsigned long failsafe_selector,
unsigned long failsafe_address)
{
return _hypercall4(int, set_callbacks,
event_selector, event_address,
failsafe_selector, failsafe_address);
}
static inline int
HYPERVISOR_fpu_taskswitch(int set)
{
return _hypercall1(int, fpu_taskswitch, set);
}
static inline int
HYPERVISOR_sched_op(int cmd, unsigned long arg)
{
return _hypercall2(int, sched_op, cmd, arg);
}
static inline long
HYPERVISOR_set_timer_op(u64 timeout)
{
unsigned long timeout_hi = (unsigned long)(timeout>>32);
unsigned long timeout_lo = (unsigned long)timeout;
return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi);
}
static inline int
HYPERVISOR_set_debugreg(int reg, unsigned long value)
{
return _hypercall2(int, set_debugreg, reg, value);
}
static inline unsigned long
HYPERVISOR_get_debugreg(int reg)
{
return _hypercall1(unsigned long, get_debugreg, reg);
}
static inline int
HYPERVISOR_update_descriptor(u64 ma, u64 desc)
{
return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
}
static inline int
HYPERVISOR_memory_op(unsigned int cmd, void *arg)
{
return _hypercall2(int, memory_op, cmd, arg);
}
static inline int
HYPERVISOR_multicall(void *call_list, int nr_calls)
{
return _hypercall2(int, multicall, call_list, nr_calls);
}
static inline int
HYPERVISOR_update_va_mapping(unsigned long va, pte_t new_val,
unsigned long flags)
{
unsigned long pte_hi = 0;
#ifdef CONFIG_X86_PAE
pte_hi = new_val.pte_high;
#endif
return _hypercall4(int, update_va_mapping, va,
new_val.pte_low, pte_hi, flags);
}
static inline int
HYPERVISOR_event_channel_op(int cmd, void *arg)
{
int rc = _hypercall2(int, event_channel_op, cmd, arg);
if (unlikely(rc == -ENOSYS)) {
struct evtchn_op op;
op.cmd = cmd;
memcpy(&op.u, arg, sizeof(op.u));
rc = _hypercall1(int, event_channel_op_compat, &op);
memcpy(arg, &op.u, sizeof(op.u));
}
return rc;
}
static inline int
HYPERVISOR_xen_version(int cmd, void *arg)
{
return _hypercall2(int, xen_version, cmd, arg);
}
static inline int
HYPERVISOR_console_io(int cmd, int count, char *str)
{
return _hypercall3(int, console_io, cmd, count, str);
}
static inline int
HYPERVISOR_physdev_op(int cmd, void *arg)
{
int rc = _hypercall2(int, physdev_op, cmd, arg);
if (unlikely(rc == -ENOSYS)) {
struct physdev_op op;
op.cmd = cmd;
memcpy(&op.u, arg, sizeof(op.u));
rc = _hypercall1(int, physdev_op_compat, &op);
memcpy(arg, &op.u, sizeof(op.u));
}
return rc;
}
static inline int
HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count)
{
return _hypercall3(int, grant_table_op, cmd, uop, count);
}
static inline int
HYPERVISOR_update_va_mapping_otherdomain(unsigned long va, pte_t new_val,
unsigned long flags, domid_t domid)
{
unsigned long pte_hi = 0;
#ifdef CONFIG_X86_PAE
pte_hi = new_val.pte_high;
#endif
return _hypercall5(int, update_va_mapping_otherdomain, va,
new_val.pte_low, pte_hi, flags, domid);
}
static inline int
HYPERVISOR_vm_assist(unsigned int cmd, unsigned int type)
{
return _hypercall2(int, vm_assist, cmd, type);
}
static inline int
HYPERVISOR_vcpu_op(int cmd, int vcpuid, void *extra_args)
{
return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
}
static inline int
HYPERVISOR_suspend(unsigned long srec)
{
return _hypercall3(int, sched_op, SCHEDOP_shutdown,
SHUTDOWN_suspend, srec);
}
static inline int
HYPERVISOR_nmi_op(unsigned long op, unsigned long arg)
{
return _hypercall2(int, nmi_op, op, arg);
}
static inline void
MULTI_update_va_mapping(struct multicall_entry *mcl, unsigned long va,
pte_t new_val, unsigned long flags)
{
mcl->op = __HYPERVISOR_update_va_mapping;
mcl->args[0] = va;
#ifdef CONFIG_X86_PAE
mcl->args[1] = new_val.pte_low;
mcl->args[2] = new_val.pte_high;
#else
mcl->args[1] = new_val.pte_low;
mcl->args[2] = 0;
#endif
mcl->args[3] = flags;
}
static inline void
MULTI_grant_table_op(struct multicall_entry *mcl, unsigned int cmd,
void *uop, unsigned int count)
{
mcl->op = __HYPERVISOR_grant_table_op;
mcl->args[0] = cmd;
mcl->args[1] = (unsigned long)uop;
mcl->args[2] = count;
}
static inline void
MULTI_update_va_mapping_otherdomain(struct multicall_entry *mcl, unsigned long va,
pte_t new_val, unsigned long flags,
domid_t domid)
{
mcl->op = __HYPERVISOR_update_va_mapping_otherdomain;
mcl->args[0] = va;
#ifdef CONFIG_X86_PAE
mcl->args[1] = new_val.pte_low;
mcl->args[2] = new_val.pte_high;
#else
mcl->args[1] = new_val.pte_low;
mcl->args[2] = 0;
#endif
mcl->args[3] = flags;
mcl->args[4] = domid;
}
static inline void
MULTI_update_descriptor(struct multicall_entry *mcl, u64 maddr,
struct desc_struct desc)
{
mcl->op = __HYPERVISOR_update_descriptor;
mcl->args[0] = maddr;
mcl->args[1] = maddr >> 32;
mcl->args[2] = desc.a;
mcl->args[3] = desc.b;
}
static inline void
MULTI_memory_op(struct multicall_entry *mcl, unsigned int cmd, void *arg)
{
mcl->op = __HYPERVISOR_memory_op;
mcl->args[0] = cmd;
mcl->args[1] = (unsigned long)arg;
}
static inline void
MULTI_mmu_update(struct multicall_entry *mcl, struct mmu_update *req,
int count, int *success_count, domid_t domid)
{
mcl->op = __HYPERVISOR_mmu_update;
mcl->args[0] = (unsigned long)req;
mcl->args[1] = count;
mcl->args[2] = (unsigned long)success_count;
mcl->args[3] = domid;
}
static inline void
MULTI_mmuext_op(struct multicall_entry *mcl, struct mmuext_op *op, int count,
int *success_count, domid_t domid)
{
mcl->op = __HYPERVISOR_mmuext_op;
mcl->args[0] = (unsigned long)op;
mcl->args[1] = count;
mcl->args[2] = (unsigned long)success_count;
mcl->args[3] = domid;
}
#endif /* __HYPERCALL_H__ */
/******************************************************************************
* hypervisor.h
*
* Linux-specific hypervisor handling.
*
* Copyright (c) 2002-2004, K A Fraser
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation; or, when distributed
* separately from the Linux kernel or incorporated into other
* software packages, subject to the following license:
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this source file (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.
*/
#ifndef __HYPERVISOR_H__
#define __HYPERVISOR_H__
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/version.h>
#include <xen/interface/xen.h>
#include <xen/interface/version.h>
#include <asm/ptrace.h>
#include <asm/page.h>
#if defined(__i386__)
# ifdef CONFIG_X86_PAE
# include <asm-generic/pgtable-nopud.h>
# else
# include <asm-generic/pgtable-nopmd.h>
# endif
#endif
#include <asm/xen/hypercall.h>
/* arch/i386/kernel/setup.c */
extern struct shared_info *HYPERVISOR_shared_info;
extern struct start_info *xen_start_info;
#define is_initial_xendomain() (xen_start_info->flags & SIF_INITDOMAIN)
/* arch/i386/mach-xen/evtchn.c */
/* Force a proper event-channel callback from Xen. */
extern void force_evtchn_callback(void);
/* Turn jiffies into Xen system time. */
u64 jiffies_to_st(unsigned long jiffies);
#define MULTI_UVMFLAGS_INDEX 3
#define MULTI_UVMDOMID_INDEX 4
#define is_running_on_xen() (xen_start_info ? 1 : 0)
#endif /* __HYPERVISOR_H__ */
/******************************************************************************
* arch-x86_32.h
*
* Guest OS interface to x86 32-bit Xen.
*
* Copyright (c) 2004, K A Fraser
*/
#ifndef __XEN_PUBLIC_ARCH_X86_32_H__
#define __XEN_PUBLIC_ARCH_X86_32_H__
#ifdef __XEN__
#define __DEFINE_GUEST_HANDLE(name, type) \
typedef struct { type *p; } __guest_handle_ ## name
#else
#define __DEFINE_GUEST_HANDLE(name, type) \
typedef type * __guest_handle_ ## name
#endif
#define DEFINE_GUEST_HANDLE_STRUCT(name) \
__DEFINE_GUEST_HANDLE(name, struct name)
#define DEFINE_GUEST_HANDLE(name) __DEFINE_GUEST_HANDLE(name, name)
#define GUEST_HANDLE(name) __guest_handle_ ## name
#ifndef __ASSEMBLY__
/* Guest handles for primitive C types. */
__DEFINE_GUEST_HANDLE(uchar, unsigned char);
__DEFINE_GUEST_HANDLE(uint, unsigned int);
__DEFINE_GUEST_HANDLE(ulong, unsigned long);
DEFINE_GUEST_HANDLE(char);
DEFINE_GUEST_HANDLE(int);
DEFINE_GUEST_HANDLE(long);
DEFINE_GUEST_HANDLE(void);
#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)
/*
* 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_RING1_CS 0xe019 /* GDT index 259 */
#define FLAT_RING1_DS 0xe021 /* GDT index 260 */
#define FLAT_RING1_SS 0xe021 /* GDT index 260 */
#define FLAT_RING3_CS 0xe02b /* GDT index 261 */
#define FLAT_RING3_DS 0xe033 /* GDT index 262 */
#define FLAT_RING3_SS 0xe033 /* GDT index 262 */
#define FLAT_KERNEL_CS FLAT_RING1_CS
#define FLAT_KERNEL_DS FLAT_RING1_DS
#define FLAT_KERNEL_SS FLAT_RING1_SS
#define FLAT_USER_CS FLAT_RING3_CS
#define FLAT_USER_DS FLAT_RING3_DS
#define FLAT_USER_SS FLAT_RING3_SS
/* And the trap vector is... */
#define TRAP_INSTR "int $0x82"
/*
* Virtual addresses beyond this are not modifiable by guest OSes. The
* machine->physical mapping table starts at this address, read-only.
*/
#ifdef CONFIG_X86_PAE
#define __HYPERVISOR_VIRT_START 0xF5800000
#else
#define __HYPERVISOR_VIRT_START 0xFC000000
#endif
#ifndef HYPERVISOR_VIRT_START
#define HYPERVISOR_VIRT_START mk_unsigned_long(__HYPERVISOR_VIRT_START)
#endif
#ifndef machine_to_phys_mapping
#define machine_to_phys_mapping ((unsigned long *)HYPERVISOR_VIRT_START)
#endif
/* Maximum number of virtual CPUs in multi-processor guests. */
#define MAX_VIRT_CPUS 32
#ifndef __ASSEMBLY__
/*
* Send an array of these to HYPERVISOR_set_trap_table()
*/
#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 */
};
DEFINE_GUEST_HANDLE_STRUCT(trap_info);
struct cpu_user_regs {
uint32_t ebx;
uint32_t ecx;
uint32_t edx;
uint32_t esi;
uint32_t edi;
uint32_t ebp;
uint32_t eax;
uint16_t error_code; /* private */
uint16_t entry_vector; /* private */
uint32_t eip;
uint16_t cs;
uint8_t saved_upcall_mask;
uint8_t _pad0;
uint32_t eflags; /* eflags.IF == !saved_upcall_mask */
uint32_t esp;
uint16_t ss, _pad1;
uint16_t es, _pad2;
uint16_t ds, _pad3;
uint16_t fs, _pad4;
uint16_t gs, _pad5;
};
DEFINE_GUEST_HANDLE_STRUCT(cpu_user_regs);
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_HVM_GUEST (1<<1)
#define VGCF_IN_KERNEL (1<<2)
unsigned long flags; /* VGCF_* flags */
struct cpu_user_regs user_regs; /* User-level CPU registers */
struct trap_info trap_ctxt[256]; /* Virtual IDT */