FreeBSD/Linux Kernel Cross Reference
sys/amd64/vmm/vmm_host.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2012 NetApp, Inc.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. 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.
     *
     * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``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 NETAPP, INC OR CONTRIBUTORS 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.
     *
     * $FreeBSD$
     */
    
    #ifndef _VMM_HOST_H_
    #define _VMM_HOST_H_
    
    #ifndef _KERNEL
    #error "no user-serviceable parts inside"
    #endif
    
    struct xsave_limits {
            int             xsave_enabled;
            uint64_t        xcr0_allowed;
            uint32_t        xsave_max_size;
    };
    
    void vmm_host_state_init(void);
    
    uint64_t vmm_get_host_pat(void);
    uint64_t vmm_get_host_efer(void);
    uint64_t vmm_get_host_cr0(void);
    uint64_t vmm_get_host_cr4(void);
    uint64_t vmm_get_host_xcr0(void);
    uint64_t vmm_get_host_datasel(void);
    uint64_t vmm_get_host_codesel(void);
    uint64_t vmm_get_host_tsssel(void);
    uint64_t vmm_get_host_fsbase(void);
    uint64_t vmm_get_host_idtrbase(void);
    const struct xsave_limits *vmm_get_xsave_limits(void);
    
    /*
     * Inline access to host state that is used on every VM entry
     */
    static __inline uint64_t
    vmm_get_host_trbase(void)
    {
    
            return ((uint64_t)PCPU_GET(tssp));
    }
    
    static __inline uint64_t
    vmm_get_host_gdtrbase(void)
    {
    
            return ((uint64_t)*PCPU_PTR(gdt));
    }
    
    static __inline uint64_t
    vmm_get_host_gsbase(void)
    {
    
            return ((uint64_t)get_pcpu());
    }
    
    #endif

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