source: mainline/kernel/arch/xen32/include/hypercall.h@ 7d3d641

/*
 * Copyright (C) 2006 Martin Decky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __xen32_HYPERCALL_H__
#define __xen32_HYPERCALL_H__

#include <arch/types.h>
#include <macros.h>


typedef uint16_t domid_t;


typedef struct {
        uint8_t vector;     /**< Exception vector */
        uint8_t flags;      /**< 0-3: privilege level; 4: clear event enable */
        uint16_t cs;        /**< Code selector */
        uintptr_t address;  /**< Code offset */
} trap_info_t;


#define XEN_SET_TRAP_TABLE              0
#define XEN_MMU_UPDATE                  1
#define XEN_SET_CALLBACKS               4
#define XEN_UPDATE_VA_MAPPING   14
#define XEN_CONSOLE_IO                  18
#define XEN_VM_ASSIST                   21
#define XEN_MMUEXT_OP                   26


/*
 * Commands for XEN_CONSOLE_IO
 */
#define CONSOLE_IO_WRITE        0
#define CONSOLE_IO_READ         1


#define MMUEXT_PIN_L1_TABLE      0
#define MMUEXT_PIN_L2_TABLE      1
#define MMUEXT_PIN_L3_TABLE      2
#define MMUEXT_PIN_L4_TABLE      3
#define MMUEXT_UNPIN_TABLE       4
#define MMUEXT_NEW_BASEPTR       5
#define MMUEXT_TLB_FLUSH_LOCAL   6
#define MMUEXT_INVLPG_LOCAL      7
#define MMUEXT_TLB_FLUSH_MULTI   8
#define MMUEXT_INVLPG_MULTI      9
#define MMUEXT_TLB_FLUSH_ALL    10
#define MMUEXT_INVLPG_ALL       11
#define MMUEXT_FLUSH_CACHE      12
#define MMUEXT_SET_LDT          13
#define MMUEXT_NEW_USER_BASEPTR 15


#define UVMF_NONE                               0        /**< No flushing at all */
#define UVMF_TLB_FLUSH                  1        /**< Flush entire TLB(s) */
#define UVMF_INVLPG                             2        /**< Flush only one entry */
#define UVMF_FLUSHTYPE_MASK             3
#define UVMF_MULTI                              0        /**< Flush subset of TLBs */
#define UVMF_LOCAL                              0        /**< Flush local TLB */
#define UVMF_ALL                                (1 << 2) /**< Flush all TLBs */


/*
 * Commands to XEN_VM_ASSIST
 */
#define VMASST_CMD_ENABLE                               0
#define VMASST_CMD_DISABLE                              1
#define VMASST_TYPE_4GB_SEGMENTS                0
#define VMASST_TYPE_4GB_SEGMENTS_NOTIFY 1
#define VMASST_TYPE_WRITABLE_PAGETABLES 2


#define DOMID_SELF (0x7FF0U)
#define DOMID_IO   (0x7FF1U)


#define hypercall0(id)  \
        ({      \
                unative_t ret;  \
                asm volatile (  \
                        "call hypercall_page + (" STRING(id) " * 32)\n" \
                        : "=a" (ret)    \
                        :       \
                        : "memory"      \
                );      \
                ret;    \
        })

#define hypercall1(id, p1)      \
        ({      \
                unative_t ret, __ign1;  \
                asm volatile (  \
                        "call hypercall_page + (" STRING(id) " * 32)\n" \
                        : "=a" (ret), \
                          "=b" (__ign1) \
                        : "1" (p1)      \
                        : "memory"      \
                );      \
                ret;    \
        })

#define hypercall2(id, p1, p2)  \
        ({      \
                unative_t ret, __ign1, __ign2;  \
                asm volatile (  \
                        "call hypercall_page + (" STRING(id) " * 32)\n" \
                        : "=a" (ret), \
                          "=b" (__ign1),        \
                          "=c" (__ign2) \
                        : "1" (p1),     \
                          "2" (p2)      \
                        : "memory"      \
                );      \
                ret;    \
        })

#define hypercall3(id, p1, p2, p3)      \
        ({      \
                unative_t ret, __ign1, __ign2, __ign3;  \
                asm volatile (  \
                        "call hypercall_page + (" STRING(id) " * 32)\n" \
                        : "=a" (ret), \
                          "=b" (__ign1),        \
                          "=c" (__ign2),        \
                          "=d" (__ign3) \
                        : "1" (p1),     \
                          "2" (p2),     \
                          "3" (p3)      \
                        : "memory"      \
                );      \
                ret;    \
        })

#define hypercall4(id, p1, p2, p3, p4)  \
        ({      \
                unative_t ret, __ign1, __ign2, __ign3, __ign4;  \
                asm volatile (  \
                        "call hypercall_page + (" STRING(id) " * 32)\n" \
                        : "=a" (ret), \
                          "=b" (__ign1),        \
                          "=c" (__ign2),        \
                          "=d" (__ign3),        \
                          "=S" (__ign4) \
                        : "1" (p1),     \
                          "2" (p2),     \
                          "3" (p3),     \
                          "4" (p4)      \
                        : "memory"      \
                );      \
                ret;    \
        })

#define hypercall5(id, p1, p2, p3, p4, p5)      \
        ({      \
                unative_t ret, __ign1, __ign2, __ign3, __ign4, __ign5;  \
                asm volatile (  \
                        "call hypercall_page + (" STRING(id) " * 32)\n" \
                        : "=a" (ret), \
                          "=b" (__ign1),        \
                          "=c" (__ign2),        \
                          "=d" (__ign3),        \
                          "=S" (__ign4),        \
                          "=D" (__ign5) \
                        : "1" (p1),     \
                          "2" (p2),     \
                          "3" (p3),     \
                          "4" (p4),     \
                          "5" (p5)      \
                        : "memory"      \
                );      \
                ret;    \
        })


static inline int xen_console_io(const unsigned int cmd, const unsigned int count, const char *str)
{
        return hypercall3(XEN_CONSOLE_IO, cmd, count, str);
}

static inline int xen_vm_assist(const unsigned int cmd, const unsigned int type)
{
    return hypercall2(XEN_VM_ASSIST, cmd, type);
}

static inline int xen_set_callbacks(const unsigned int event_selector, const void *event_address, const unsigned int failsafe_selector, void *failsafe_address)
{
        return hypercall4(XEN_SET_CALLBACKS, event_selector, event_address, failsafe_selector, failsafe_address);
}

static inline int xen_set_trap_table(const trap_info_t *table)
{
        return hypercall1(XEN_SET_TRAP_TABLE, table);
}

#endif