The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/xen/interface/hvm/hvm_info_table.h

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    1 /******************************************************************************
    2  * hvm/hvm_info_table.h
    3  * 
    4  * HVM parameter and information table, written into guest memory map.
    5  *
    6  * Permission is hereby granted, free of charge, to any person obtaining a copy
    7  * of this software and associated documentation files (the "Software"), to
    8  * deal in the Software without restriction, including without limitation the
    9  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   10  * sell copies of the Software, and to permit persons to whom the Software is
   11  * furnished to do so, subject to the following conditions:
   12  *
   13  * The above copyright notice and this permission notice shall be included in
   14  * all copies or substantial portions of the Software.
   15  *
   16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
   22  * DEALINGS IN THE SOFTWARE.
   23  */
   24 
   25 #ifndef __XEN_PUBLIC_HVM_HVM_INFO_TABLE_H__
   26 #define __XEN_PUBLIC_HVM_HVM_INFO_TABLE_H__
   27 
   28 #define HVM_INFO_PFN         0x09F
   29 #define HVM_INFO_OFFSET      0x800
   30 #define HVM_INFO_PADDR       ((HVM_INFO_PFN << 12) + HVM_INFO_OFFSET)
   31 
   32 /* Maximum we can support with current vLAPIC ID mapping. */
   33 #define HVM_MAX_VCPUS        128
   34 
   35 struct hvm_info_table {
   36     char        signature[8]; /* "HVM INFO" */
   37     uint32_t    length;
   38     uint8_t     checksum;
   39 
   40     /* Should firmware build APIC descriptors (APIC MADT / MP BIOS)? */
   41     uint8_t     apic_mode;
   42 
   43     /* How many CPUs does this domain have? */
   44     uint32_t    nr_vcpus;
   45 
   46     /*
   47      * MEMORY MAP provided by HVM domain builder.
   48      * Notes:
   49      *  1. page_to_phys(x) = x << 12
   50      *  2. If a field is zero, the corresponding range does not exist.
   51      */
   52     /*
   53      *  0x0 to page_to_phys(low_mem_pgend)-1:
   54      *    RAM below 4GB (except for VGA hole 0xA0000-0xBFFFF)
   55      */
   56     uint32_t    low_mem_pgend;
   57     /*
   58      *  page_to_phys(reserved_mem_pgstart) to 0xFFFFFFFF:
   59      *    Reserved for special memory mappings
   60      */
   61     uint32_t    reserved_mem_pgstart;
   62     /*
   63      *  0x100000000 to page_to_phys(high_mem_pgend)-1:
   64      *    RAM above 4GB
   65      */
   66     uint32_t    high_mem_pgend;
   67 
   68     /* Bitmap of which CPUs are online at boot time. */
   69     uint8_t     vcpu_online[(HVM_MAX_VCPUS + 7)/8];
   70 };
   71 
   72 #endif /* __XEN_PUBLIC_HVM_HVM_INFO_TABLE_H__ */

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