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https://github.com/xen-project/xen.git
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Andrew Cooper
eba7e67bc4
Also refactor the contents of xc_pfn_to_mfn(). It is functionally identical, but contains less lisp, fewer magic numbers, and more description of why 32bit guests are treated differently. Note that this does not affect pfn_to_mfn() in xc_domain_save.c That was already a macro which aliased pfn_to_mfn() in xg_private.h but without actually using it. Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com> CC: Ian Campbell <Ian.Campbell@citrix.com> CC: Ian Jackson <Ian.Jackson@eu.citrix.com> Acked-by: Ian Campbell <ian.campbell@citrix.com>
179 lines
5.8 KiB
C
179 lines
5.8 KiB
C
/*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef XG_PRIVATE_H
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#define XG_PRIVATE_H
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#include <unistd.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/mman.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "xenctrl.h"
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#include "xenguest.h"
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#include "xc_private.h"
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#include <xen/memory.h>
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#include <xen/elfnote.h>
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#ifndef ELFSIZE
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#include <limits.h>
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#if UINT_MAX == ULONG_MAX
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#define ELFSIZE 32
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#else
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#define ELFSIZE 64
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#endif
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#endif
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char *xc_read_image(xc_interface *xch,
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const char *filename, unsigned long *size);
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char *xc_inflate_buffer(xc_interface *xch,
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const char *in_buf,
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unsigned long in_size,
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unsigned long *out_size);
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unsigned long csum_page (void * page);
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#define _PAGE_PRESENT 0x001
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#define _PAGE_RW 0x002
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#define _PAGE_USER 0x004
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#define _PAGE_PWT 0x008
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#define _PAGE_PCD 0x010
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#define _PAGE_ACCESSED 0x020
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#define _PAGE_DIRTY 0x040
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#define _PAGE_PAT 0x080
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#define _PAGE_PSE 0x080
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#define _PAGE_GLOBAL 0x100
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#define L1_PAGETABLE_SHIFT_I386 12
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#define L2_PAGETABLE_SHIFT_I386 22
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#define L1_PAGETABLE_ENTRIES_I386 1024
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#define L2_PAGETABLE_ENTRIES_I386 1024
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#define L1_PAGETABLE_SHIFT_PAE 12
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#define L2_PAGETABLE_SHIFT_PAE 21
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#define L3_PAGETABLE_SHIFT_PAE 30
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#define L1_PAGETABLE_ENTRIES_PAE 512
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#define L2_PAGETABLE_ENTRIES_PAE 512
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#define L3_PAGETABLE_ENTRIES_PAE 4
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#define L1_PAGETABLE_SHIFT_X86_64 12
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#define L2_PAGETABLE_SHIFT_X86_64 21
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#define L3_PAGETABLE_SHIFT_X86_64 30
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#define L4_PAGETABLE_SHIFT_X86_64 39
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#define L1_PAGETABLE_ENTRIES_X86_64 512
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#define L2_PAGETABLE_ENTRIES_X86_64 512
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#define L3_PAGETABLE_ENTRIES_X86_64 512
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#define L4_PAGETABLE_ENTRIES_X86_64 512
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typedef uint32_t l1_pgentry_32_t;
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typedef uint32_t l2_pgentry_32_t;
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typedef uint64_t l1_pgentry_64_t;
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typedef uint64_t l2_pgentry_64_t;
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typedef uint64_t l3_pgentry_64_t;
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typedef uint64_t l4_pgentry_64_t;
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#define l1_table_offset_i386(_a) \
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(((_a) >> L1_PAGETABLE_SHIFT_I386) & (L1_PAGETABLE_ENTRIES_I386 - 1))
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#define l2_table_offset_i386(_a) \
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(((_a) >> L2_PAGETABLE_SHIFT_I386) & (L2_PAGETABLE_ENTRIES_I386 - 1))
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#define l1_table_offset_pae(_a) \
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(((_a) >> L1_PAGETABLE_SHIFT_PAE) & (L1_PAGETABLE_ENTRIES_PAE - 1))
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#define l2_table_offset_pae(_a) \
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(((_a) >> L2_PAGETABLE_SHIFT_PAE) & (L2_PAGETABLE_ENTRIES_PAE - 1))
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#define l3_table_offset_pae(_a) \
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(((_a) >> L3_PAGETABLE_SHIFT_PAE) & (L3_PAGETABLE_ENTRIES_PAE - 1))
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#define l1_table_offset_x86_64(_a) \
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(((_a) >> L1_PAGETABLE_SHIFT_X86_64) & (L1_PAGETABLE_ENTRIES_X86_64 - 1))
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#define l2_table_offset_x86_64(_a) \
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(((_a) >> L2_PAGETABLE_SHIFT_X86_64) & (L2_PAGETABLE_ENTRIES_X86_64 - 1))
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#define l3_table_offset_x86_64(_a) \
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(((_a) >> L3_PAGETABLE_SHIFT_X86_64) & (L3_PAGETABLE_ENTRIES_X86_64 - 1))
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#define l4_table_offset_x86_64(_a) \
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(((_a) >> L4_PAGETABLE_SHIFT_X86_64) & (L4_PAGETABLE_ENTRIES_X86_64 - 1))
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#define PAGE_SHIFT_ARM 12
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#define PAGE_SIZE_ARM (1UL << PAGE_SHIFT_ARM)
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#define PAGE_MASK_ARM (~(PAGE_SIZE_ARM-1))
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#define PAGE_SHIFT_X86 12
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#define PAGE_SIZE_X86 (1UL << PAGE_SHIFT_X86)
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#define PAGE_MASK_X86 (~(PAGE_SIZE_X86-1))
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#define ROUNDUP(_x,_w) (((unsigned long)(_x)+(1UL<<(_w))-1) & ~((1UL<<(_w))-1))
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#define NRPAGES(x) (ROUNDUP(x, PAGE_SHIFT) >> PAGE_SHIFT)
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/* XXX SMH: following skanky macros rely on variable p2m_size being set */
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/* XXX TJD: also, "guest_width" should be the guest's sizeof(unsigned long) */
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struct domain_info_context {
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unsigned int guest_width;
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unsigned long p2m_size;
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};
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static inline xen_pfn_t xc_pfn_to_mfn(xen_pfn_t pfn, xen_pfn_t *p2m,
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unsigned gwidth)
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{
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if ( gwidth == sizeof(uint64_t) )
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/* 64 bit guest. Need to truncate their pfns for 32 bit toolstacks. */
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return ((uint64_t *)p2m)[pfn];
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else
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{
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/* 32 bit guest. Need to expand INVALID_MFN for 64 bit toolstacks. */
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uint32_t mfn = ((uint32_t *)p2m)[pfn];
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return mfn == ~0U ? INVALID_MFN : mfn;
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}
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}
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/* Number of xen_pfn_t in a page */
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#define FPP (PAGE_SIZE/(dinfo->guest_width))
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/* Number of entries in the pfn_to_mfn_frame_list_list */
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#define P2M_FLL_ENTRIES (((dinfo->p2m_size)+(FPP*FPP)-1)/(FPP*FPP))
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/* Number of entries in the pfn_to_mfn_frame_list */
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#define P2M_FL_ENTRIES (((dinfo->p2m_size)+FPP-1)/FPP)
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/* Size in bytes of the pfn_to_mfn_frame_list */
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#define P2M_GUEST_FL_SIZE ((P2M_FL_ENTRIES) * (dinfo->guest_width))
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#define P2M_TOOLS_FL_SIZE ((P2M_FL_ENTRIES) * \
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MAX((sizeof (xen_pfn_t)), dinfo->guest_width))
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/* Masks for PTE<->PFN conversions */
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#define MADDR_BITS_X86 ((dinfo->guest_width == 8) ? 52 : 44)
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#define MFN_MASK_X86 ((1ULL << (MADDR_BITS_X86 - PAGE_SHIFT_X86)) - 1)
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#define MADDR_MASK_X86 (MFN_MASK_X86 << PAGE_SHIFT_X86)
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#define PAEKERN_no 0
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#define PAEKERN_yes 1
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#define PAEKERN_extended_cr3 2
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#define PAEKERN_bimodal 3
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int pin_table(xc_interface *xch, unsigned int type, unsigned long mfn,
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domid_t dom);
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#endif /* XG_PRIVATE_H */
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