d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
b8d60729de
freebsd-dev/sys/i386/include/xen/hypercall.h
Roger Pau Monne ed78016d00 xen/privcmd: implement the dm op ioctl 
Use an interface compatible with the Linux one so that the user-space
libraries already using the Linux interface can be used without much
modifications.

This allows user-space to make use of the dm_op family of hypercalls,
which are used by device models.

Sponsored by:	Citrix Systems R&D
2021-01-11 16:33:27 +01:00

425 lines
12 KiB
C
Raw Blame History

/******************************************************************************
* hypercall.h
*
* Linux-specific hypervisor handling.
*
* Copyright (c) 2002-2004, K A Fraser
*
* This file may be 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 <sys/systm.h>
#include <xen/interface/xen.h>
#include <xen/interface/sched.h>
extern char *hypercall_page;
#define __STR(x) #x
#define STR(x) __STR(x)
#define ENOXENSYS 38
#define CONFIG_XEN_COMPAT 0x030002
#define HYPERCALL_STR(name) \
"call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"
#define _hypercall0(type, name) \
({ \
long __res; \
__asm__ volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res) \
: \
: "memory" ); \
(type)__res; \
})
#define _hypercall1(type, name, a1) \
({ \
long __res, __ign1; \
__asm__ volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res), "=b" (__ign1) \
: "1" ((long)(a1)) \
: "memory" ); \
(type)__res; \
})
#define _hypercall2(type, name, a1, a2) \
({ \
long __res, __ign1, __ign2; \
__asm__ volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res), "=b" (__ign1), "=c" (__ign2) \
: "1" ((long)(a1)), "2" ((long)(a2)) \
: "memory" ); \
(type)__res; \
})
#define _hypercall3(type, name, a1, a2, a3) \
({ \
long __res, __ign1, __ign2, __ign3; \
__asm__ volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res), "=b" (__ign1), "=c" (__ign2), \
"=d" (__ign3) \
: "1" ((long)(a1)), "2" ((long)(a2)), \
"3" ((long)(a3)) \
: "memory" ); \
(type)__res; \
})
#define _hypercall4(type, name, a1, a2, a3, a4) \
({ \
long __res, __ign1, __ign2, __ign3, __ign4; \
__asm__ volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res), "=b" (__ign1), "=c" (__ign2), \
"=d" (__ign3), "=S" (__ign4) \
: "1" ((long)(a1)), "2" ((long)(a2)), \
"3" ((long)(a3)), "4" ((long)(a4)) \
: "memory" ); \
(type)__res; \
})
#define _hypercall5(type, name, a1, a2, a3, a4, a5) \
({ \
long __res, __ign1, __ign2, __ign3, __ign4, __ign5; \
__asm__ volatile ( \
HYPERCALL_STR(name) \
: "=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)) \
: "memory" ); \
(type)__res; \
})
static inline long
privcmd_hypercall(long op, long a1, long a2, long a3, long a4, long a5)
{
long __res, __ign1, __ign2, __ign3, __ign4, __ign5, __call;
__call = (long)&hypercall_page + (op * 32);
__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] "a" (__call)
: "memory" );
return __res;
}
static inline int
HYPERVISOR_set_trap_table(
trap_info_t *table)
{
return _hypercall1(int, set_trap_table, table);
}
static inline int
HYPERVISOR_mmu_update(
mmu_update_t *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(
mmuext_op_t *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_compat(
int cmd, unsigned long arg)
{
return _hypercall2(int, sched_op_compat, cmd, arg);
}
static inline int
HYPERVISOR_sched_op(
int cmd, void *arg)
{
return _hypercall2(int, sched_op, cmd, arg);
}
static inline long
HYPERVISOR_set_timer_op(
uint64_t 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_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
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(
uint64_t ma, uint64_t 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, uint64_t new_val, unsigned long flags)
{
uint32_t hi, lo;
lo = (uint32_t)(new_val & 0xffffffff);
hi = (uint32_t)(new_val >> 32);
return _hypercall4(int, update_va_mapping, va,
lo, hi, flags);
}
static inline int
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
HYPERVISOR_xen_version(
int cmd, void *arg)
{
return _hypercall2(int, xen_version, cmd, arg);
}
static inline int
HYPERVISOR_console_io(
int cmd, int count, const 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 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
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, uint64_t new_val, unsigned long flags, domid_t domid)
{
uint32_t hi, lo;
lo = (uint32_t)(new_val & 0xffffffff);
hi = (uint32_t)(new_val >> 32);
return _hypercall5(int, update_va_mapping_otherdomain, va,
lo, 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)
{
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
static inline int
HYPERVISOR_callback_op(
int cmd, void *arg)
{
return _hypercall2(int, callback_op, cmd, arg);
}
#ifndef CONFIG_XEN
static inline unsigned long
HYPERVISOR_hvm_op(
int op, void *arg)
{
return _hypercall2(unsigned long, hvm_op, op, arg);
}
#endif
static inline int
HYPERVISOR_xenoprof_op(
int op, void *arg)
{
return _hypercall2(int, xenoprof_op, op, arg);
}
static inline int
HYPERVISOR_kexec_op(
unsigned long op, void *args)
{
return _hypercall2(int, kexec_op, op, args);
}
static inline int
HYPERVISOR_dm_op(
domid_t domid, unsigned int nr_bufs, const void *bufs)
{
return _hypercall3(int, dm_op, domid, nr_bufs, bufs);
}
#endif /* __HYPERCALL_H__ */
/*
* Local variables:
* c-file-style: "linux"
* indent-tabs-mode: t
* c-indent-level: 8
* c-basic-offset: 8
* tab-width: 8
* End:
*/
Reference in New Issue View Git Blame Copy Permalink