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https://github.com/xen-project/xen.git
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Juergen Gross
81a76e4b12
In order to prepare a p2m list outside of the initial kernel mapping do a rework of the domain builder's page table handler. The goal is to be able to use common helpers for page table allocation and setup for initial kernel page tables and page tables mapping the p2m list. This is achieved by supporting multiple mapping areas. The mapped virtual addresses of the single areas must not overlap, while the page tables of a new area added might already be partially present. Especially the top level page table is existing only once, of course. Currently restrict the number of mappings to 1 because the only mapping now is the initial mapping created by toolstack. There should not be behaviour change and guest visible change introduced. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Wei Liu <wei.liu2@citrix.com>
149 lines
4.5 KiB
C
149 lines
4.5 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, see <http://www.gnu.org/licenses/>.
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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 VIRT_BITS_I386 32
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#define VIRT_BITS_X86_64 48
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#define PGTBL_LEVELS_I386 3
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#define PGTBL_LEVELS_X86_64 4
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#define PGTBL_LEVEL_SHIFT_X86 9
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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 uint64_t x86_pgentry_t;
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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_t(size_t, 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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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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