d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
3e4930b0a9
freebsd-dev/sys/amd64/include/xen/hypercall.h
Roger Pau Monné bf7313e3b7 xen: implement the privcmd user-space device 
This device is only attached to priviledged domains, and allows the
toolstack to interact with Xen. The two functions of the privcmd
interface is to allow the execution of hypercalls from user-space, and
the mapping of foreign domain memory.

Sponsored by: Citrix Systems R&D

i386/include/xen/hypercall.h:
amd64/include/xen/hypercall.h:
 - Introduce a function to make generic hypercalls into Xen.

xen/interface/xen.h:
xen/interface/memory.h:
 - Import the new hypercall XENMEM_add_to_physmap_range used by
   auto-translated guests to map memory from foreign domains.

dev/xen/privcmd/privcmd.c:
 - This device has the following functions:
   - Allow user-space applications to make hypercalls into Xen.
   - Allow user-space applications to map memory from foreign domains,
     this is accomplished using the newly introduced hypercall
     (XENMEM_add_to_physmap_range).

xen/privcmd.h:
 - Public ioctl interface for the privcmd device.

x86/xen/hvm.c:
 - Remove declaration of hypercall_page, now it's declared in
   hypercall.h.

conf/files:
 - Add the privcmd device to the build process.
2014-10-22 17:07:20 +00:00

433 lines
10 KiB
C
Raw Blame History

/******************************************************************************
* hypercall.h
*
* FreeBSD-specific hypervisor handling.
*
* Copyright (c) 2002-2004, K A Fraser
*
* 64-bit updates:
* Benjamin Liu <benjamin.liu@intel.com>
* Jun Nakajima <jun.nakajima@intel.com>
*
* 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.
*
* $FreeBSD$
*/
#ifndef __MACHINE_XEN_HYPERCALL_H__
#define __MACHINE_XEN_HYPERCALL_H__
#include <sys/systm.h>
#ifndef __XEN_HYPERVISOR_H__
# error "please don't include this file directly"
#endif
extern char *hypercall_page;
#define __STR(x) #x
#define STR(x) __STR(x)
#define ENOXENSYS 38
#define CONFIG_XEN_COMPAT 0x030002
#define __must_check
#define HYPERCALL_STR(name) \
"call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"
#define _hypercall0(type, name) \
({ \
type __res; \
__asm__ volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res) \
: \
: "memory" ); \
__res; \
})
#define _hypercall1(type, name, a1) \
({ \
type __res; \
long __ign1; \
__asm__ volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res), "=D" (__ign1) \
: "1" ((long)(a1)) \
: "memory" ); \
__res; \
})
#define _hypercall2(type, name, a1, a2) \
({ \
type __res; \
long __ign1, __ign2; \
__asm__ volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res), "=D" (__ign1), "=S" (__ign2) \
: "1" ((long)(a1)), "2" ((long)(a2)) \
: "memory" ); \
__res; \
})
#define _hypercall3(type, name, a1, a2, a3) \
({ \
type __res; \
long __ign1, __ign2, __ign3; \
__asm__ volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res), "=D" (__ign1), "=S" (__ign2), \
"=d" (__ign3) \
: "1" ((long)(a1)), "2" ((long)(a2)), \
"3" ((long)(a3)) \
: "memory" ); \
__res; \
})
#define _hypercall4(type, name, a1, a2, a3, a4) \
({ \
type __res; \
long __ign1, __ign2, __ign3; \
register long __arg4 __asm__("r10") = (long)(a4); \
__asm__ volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res), "=D" (__ign1), "=S" (__ign2), \
"=d" (__ign3), "+r" (__arg4) \
: "1" ((long)(a1)), "2" ((long)(a2)), \
"3" ((long)(a3)) \
: "memory" ); \
__res; \
})
#define _hypercall5(type, name, a1, a2, a3, a4, a5) \
({ \
type __res; \
long __ign1, __ign2, __ign3; \
register long __arg4 __asm__("r10") = (long)(a4); \
register long __arg5 __asm__("r8") = (long)(a5); \
__asm__ volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res), "=D" (__ign1), "=S" (__ign2), \
"=d" (__ign3), "+r" (__arg4), "+r" (__arg5) \
: "1" ((long)(a1)), "2" ((long)(a2)), \
"3" ((long)(a3)) \
: "memory" ); \
__res; \
})
static inline int
privcmd_hypercall(long op, long a1, long a2, long a3, long a4, long a5)
{
int __res;
long __ign1, __ign2, __ign3;
register long __arg4 __asm__("r10") = (long)(a4);
register long __arg5 __asm__("r8") = (long)(a5);
long __call = (long)&hypercall_page + (op * 32);
__asm__ volatile (
"call *%[call]"
: "=a" (__res), "=D" (__ign1), "=S" (__ign2),
"=d" (__ign3), "+r" (__arg4), "+r" (__arg5)
: "1" ((long)(a1)), "2" ((long)(a2)),
"3" ((long)(a3)), [call] "a" (__call)
: "memory" );
return (__res);
}
static inline int __must_check
HYPERVISOR_set_trap_table(
const trap_info_t *table)
{
return _hypercall1(int, set_trap_table, table);
}
static inline int __must_check
HYPERVISOR_mmu_update(
mmu_update_t *req, unsigned int count, unsigned int *success_count,
domid_t domid)
{
return _hypercall4(int, mmu_update, req, count, success_count, domid);
}
static inline int __must_check
HYPERVISOR_mmuext_op(
struct mmuext_op *op, unsigned int count, unsigned int *success_count,
domid_t domid)
{
return _hypercall4(int, mmuext_op, op, count, success_count, domid);
}
static inline int __must_check
HYPERVISOR_set_gdt(
unsigned long *frame_list, unsigned int entries)
{
return _hypercall2(int, set_gdt, frame_list, entries);
}
static inline int __must_check
HYPERVISOR_stack_switch(
unsigned long ss, unsigned long esp)
{
return _hypercall2(int, stack_switch, ss, esp);
}
static inline int __must_check
HYPERVISOR_set_callbacks(
unsigned long event_address, unsigned long failsafe_address,
unsigned long syscall_address)
{
return _hypercall3(int, set_callbacks,
event_address, failsafe_address, syscall_address);
}
static inline int
HYPERVISOR_fpu_taskswitch(
int set)
{
return _hypercall1(int, fpu_taskswitch, set);
}
static inline int __must_check
HYPERVISOR_sched_op_compat(
int cmd, unsigned long arg)
{
return _hypercall2(int, sched_op_compat, cmd, arg);
}
static inline int __must_check
HYPERVISOR_sched_op(
int cmd, void *arg)
{
return _hypercall2(int, sched_op, cmd, arg);
}
static inline long __must_check
HYPERVISOR_set_timer_op(
uint64_t timeout)
{
return _hypercall1(long, set_timer_op, timeout);
}
static inline int __must_check
HYPERVISOR_platform_op(
struct xen_platform_op *platform_op)
{
platform_op->interface_version = XENPF_INTERFACE_VERSION;
return _hypercall1(int, platform_op, platform_op);
}
static inline int __must_check
HYPERVISOR_set_debugreg(
unsigned int reg, unsigned long value)
{
return _hypercall2(int, set_debugreg, reg, value);
}
static inline unsigned long __must_check
HYPERVISOR_get_debugreg(
unsigned int reg)
{
return _hypercall1(unsigned long, get_debugreg, reg);
}
static inline int __must_check
HYPERVISOR_update_descriptor(
unsigned long ma, unsigned long word)
{
return _hypercall2(int, update_descriptor, ma, word);
}
static inline int __must_check
HYPERVISOR_memory_op(
unsigned int cmd, void *arg)
{
return _hypercall2(int, memory_op, cmd, arg);
}
static inline int __must_check
HYPERVISOR_multicall(
multicall_entry_t *call_list, unsigned int nr_calls)
{
return _hypercall2(int, multicall, call_list, nr_calls);
}
static inline int __must_check
HYPERVISOR_update_va_mapping(
unsigned long va, uint64_t new_val, unsigned long flags)
{
return _hypercall3(int, update_va_mapping, va, new_val, flags);
}
static inline int __must_check
HYPERVISOR_event_channel_op(
int cmd, void *arg)
{
int rc = _hypercall2(int, event_channel_op, cmd, arg);
#if CONFIG_XEN_COMPAT <= 0x030002
if (__predict_false(rc == -ENOXENSYS)) {
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));
}
#endif
return rc;
}
static inline int __must_check
HYPERVISOR_xen_version(
int cmd, void *arg)
{
return _hypercall2(int, xen_version, cmd, arg);
}
static inline int __must_check
HYPERVISOR_console_io(
int cmd, unsigned int count, char *str)
{
return _hypercall3(int, console_io, cmd, count, str);
}
static inline int __must_check
HYPERVISOR_physdev_op(
int cmd, void *arg)
{
int rc = _hypercall2(int, physdev_op, cmd, arg);
#if CONFIG_XEN_COMPAT <= 0x030002
if (__predict_false(rc == -ENOXENSYS)) {
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));
}
#endif
return rc;
}
static inline int __must_check
HYPERVISOR_grant_table_op(
unsigned int cmd, void *uop, unsigned int count)
{
return _hypercall3(int, grant_table_op, cmd, uop, count);
}
static inline int __must_check
HYPERVISOR_update_va_mapping_otherdomain(
unsigned long va, uint64_t new_val, unsigned long flags, domid_t domid)
{
return _hypercall4(int, update_va_mapping_otherdomain, va,
new_val, flags, domid);
}
static inline int __must_check
HYPERVISOR_vm_assist(
unsigned int cmd, unsigned int type)
{
return _hypercall2(int, vm_assist, cmd, type);
}
static inline int __must_check
HYPERVISOR_vcpu_op(
int cmd, unsigned int vcpuid, void *extra_args)
{
return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
}
static inline int __must_check
HYPERVISOR_set_segment_base(
int reg, unsigned long value)
{
return _hypercall2(int, set_segment_base, reg, value);
}
static inline int __must_check
HYPERVISOR_suspend(
unsigned long srec)
{
struct sched_shutdown sched_shutdown = {
.reason = SHUTDOWN_suspend
};
int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown,
&sched_shutdown, srec);
#if CONFIG_XEN_COMPAT <= 0x030002
if (rc == -ENOXENSYS)
rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown,
SHUTDOWN_suspend, srec);
#endif
return rc;
}
#if CONFIG_XEN_COMPAT <= 0x030002
static inline int
HYPERVISOR_nmi_op(
unsigned long op, void *arg)
{
return _hypercall2(int, nmi_op, op, arg);
}
#endif
#ifndef CONFIG_XEN
static inline unsigned long __must_check
HYPERVISOR_hvm_op(
int op, void *arg)
{
return _hypercall2(unsigned long, hvm_op, op, arg);
}
#endif
static inline int __must_check
HYPERVISOR_callback_op(
int cmd, const void *arg)
{
return _hypercall2(int, callback_op, cmd, arg);
}
static inline int __must_check
HYPERVISOR_xenoprof_op(
int op, void *arg)
{
return _hypercall2(int, xenoprof_op, op, arg);
}
static inline int __must_check
HYPERVISOR_kexec_op(
unsigned long op, void *args)
{
return _hypercall2(int, kexec_op, op, args);
}
#undef __must_check
#endif /* __MACHINE_XEN_HYPERCALL_H__ */
Reference in New Issue View Git Blame Copy Permalink