228 lines
7.7 KiB
C
228 lines
7.7 KiB
C
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/*
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*
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* Copyright (c) 2004 Christian Limpach.
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* Copyright (c) 2004,2005 Kip Macy
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christian Limpach.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _XEN_XENPMAP_H_
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#define _XEN_XENPMAP_H_
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#include <machine/xen/features.h>
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void _xen_queue_pt_update(vm_paddr_t, vm_paddr_t, char *, int);
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void xen_pt_switch(vm_paddr_t);
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void xen_set_ldt(vm_paddr_t, unsigned long);
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void xen_pgdpt_pin(vm_paddr_t);
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void xen_pgd_pin(vm_paddr_t);
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void xen_pgd_unpin(vm_paddr_t);
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void xen_pt_pin(vm_paddr_t);
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void xen_pt_unpin(vm_paddr_t);
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void xen_flush_queue(void);
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void xen_check_queue(void);
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#if 0
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void pmap_ref(pt_entry_t *pte, vm_paddr_t ma);
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#endif
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#ifdef INVARIANTS
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#define xen_queue_pt_update(a, b) _xen_queue_pt_update((a), (b), __FILE__, __LINE__)
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#else
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#define xen_queue_pt_update(a, b) _xen_queue_pt_update((a), (b), NULL, 0)
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#endif
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#ifdef PMAP_DEBUG
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#define PMAP_REF pmap_ref
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#define PMAP_DEC_REF_PAGE pmap_dec_ref_page
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#define PMAP_MARK_PRIV pmap_mark_privileged
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#define PMAP_MARK_UNPRIV pmap_mark_unprivileged
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#else
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#define PMAP_MARK_PRIV(a)
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#define PMAP_MARK_UNPRIV(a)
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#define PMAP_REF(a, b)
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#define PMAP_DEC_REF_PAGE(a)
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#endif
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#define ALWAYS_SYNC 0
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#ifdef PT_DEBUG
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#define PT_LOG() printk("WP PT_SET %s:%d\n", __FILE__, __LINE__)
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#else
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#define PT_LOG()
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#endif
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#define INVALID_P2M_ENTRY (~0UL)
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#define pmap_valid_entry(E) ((E) & PG_V) /* is PDE or PTE valid? */
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#define SH_PD_SET_VA 1
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#define SH_PD_SET_VA_MA 2
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#define SH_PD_SET_VA_CLEAR 3
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struct pmap;
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void pd_set(struct pmap *pmap, int ptepindex, vm_paddr_t val, int type);
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#ifdef notyet
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static vm_paddr_t
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vptetomachpte(vm_paddr_t *pte)
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{
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vm_offset_t offset, ppte;
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vm_paddr_t pgoffset, retval, *pdir_shadow_ptr;
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int pgindex;
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ppte = (vm_offset_t)pte;
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pgoffset = (ppte & PAGE_MASK);
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offset = ppte - (vm_offset_t)PTmap;
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pgindex = ppte >> PDRSHIFT;
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pdir_shadow_ptr = (vm_paddr_t *)PCPU_GET(pdir_shadow);
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retval = (pdir_shadow_ptr[pgindex] & ~PAGE_MASK) + pgoffset;
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return (retval);
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}
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#endif
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#define PT_GET(_ptp) \
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(pmap_valid_entry(*(_ptp)) ? xpmap_mtop(*(_ptp)) : (0))
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#ifdef WRITABLE_PAGETABLES
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#define PT_SET_VA(_ptp,_npte,sync) do { \
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PMAP_REF((_ptp), xpmap_ptom(_npte)); \
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PT_LOG(); \
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*(_ptp) = xpmap_ptom((_npte)); \
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} while (/*CONSTCOND*/0)
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#define PT_SET_VA_MA(_ptp,_npte,sync) do { \
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PMAP_REF((_ptp), (_npte)); \
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PT_LOG(); \
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*(_ptp) = (_npte); \
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} while (/*CONSTCOND*/0)
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#define PT_CLEAR_VA(_ptp, sync) do { \
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PMAP_REF((pt_entry_t *)(_ptp), 0); \
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PT_LOG(); \
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*(_ptp) = 0; \
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} while (/*CONSTCOND*/0)
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#define PD_SET_VA(_pmap, _ptp, _npte, sync) do { \
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PMAP_REF((_ptp), xpmap_ptom(_npte)); \
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pd_set((_pmap),(_ptp),(_npte), SH_PD_SET_VA); \
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if (sync || ALWAYS_SYNC) xen_flush_queue(); \
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} while (/*CONSTCOND*/0)
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#define PD_SET_VA_MA(_pmap, _ptp, _npte, sync) do { \
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PMAP_REF((_ptp), (_npte)); \
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pd_set((_pmap),(_ptp),(_npte), SH_PD_SET_VA_MA); \
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if (sync || ALWAYS_SYNC) xen_flush_queue(); \
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} while (/*CONSTCOND*/0)
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#define PD_CLEAR_VA(_pmap, _ptp, sync) do { \
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PMAP_REF((pt_entry_t *)(_ptp), 0); \
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pd_set((_pmap),(_ptp), 0, SH_PD_SET_VA_CLEAR); \
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if (sync || ALWAYS_SYNC) xen_flush_queue(); \
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} while (/*CONSTCOND*/0)
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#else /* !WRITABLE_PAGETABLES */
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#define PT_SET_VA(_ptp,_npte,sync) do { \
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PMAP_REF((_ptp), xpmap_ptom(_npte)); \
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xen_queue_pt_update(vtomach(_ptp), \
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xpmap_ptom(_npte)); \
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if (sync || ALWAYS_SYNC) xen_flush_queue(); \
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} while (/*CONSTCOND*/0)
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#define PT_SET_VA_MA(_ptp,_npte,sync) do { \
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PMAP_REF((_ptp), (_npte)); \
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xen_queue_pt_update(vtomach(_ptp), _npte); \
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if (sync || ALWAYS_SYNC) xen_flush_queue(); \
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} while (/*CONSTCOND*/0)
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#define PT_CLEAR_VA(_ptp, sync) do { \
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PMAP_REF((pt_entry_t *)(_ptp), 0); \
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xen_queue_pt_update(vtomach(_ptp), 0); \
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if (sync || ALWAYS_SYNC) \
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xen_flush_queue(); \
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} while (/*CONSTCOND*/0)
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#define PD_SET_VA(_pmap, _ptepindex,_npte,sync) do { \
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PMAP_REF((_ptp), xpmap_ptom(_npte)); \
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pd_set((_pmap),(_ptepindex),(_npte), SH_PD_SET_VA); \
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if (sync || ALWAYS_SYNC) xen_flush_queue(); \
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} while (/*CONSTCOND*/0)
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#define PD_SET_VA_MA(_pmap, _ptepindex,_npte,sync) do { \
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PMAP_REF((_ptp), (_npte)); \
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pd_set((_pmap),(_ptepindex),(_npte), SH_PD_SET_VA_MA); \
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if (sync || ALWAYS_SYNC) xen_flush_queue(); \
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} while (/*CONSTCOND*/0)
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#define PD_CLEAR_VA(_pmap, _ptepindex, sync) do { \
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PMAP_REF((pt_entry_t *)(_ptp), 0); \
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pd_set((_pmap),(_ptepindex), 0, SH_PD_SET_VA_CLEAR); \
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if (sync || ALWAYS_SYNC) xen_flush_queue(); \
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} while (/*CONSTCOND*/0)
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#endif
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#define PT_SET_MA(_va, _ma) \
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do { \
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PANIC_IF(HYPERVISOR_update_va_mapping(((unsigned long)(_va)),\
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(_ma), \
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UVMF_INVLPG| UVMF_ALL) < 0); \
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} while (/*CONSTCOND*/0)
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#define PT_UPDATES_FLUSH() do { \
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xen_flush_queue(); \
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} while (/*CONSTCOND*/0)
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static __inline vm_paddr_t
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xpmap_mtop(vm_paddr_t mpa)
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{
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vm_paddr_t tmp = (mpa & PG_FRAME);
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return machtophys(tmp) | (mpa & ~PG_FRAME);
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}
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static __inline vm_paddr_t
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xpmap_ptom(vm_paddr_t ppa)
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{
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vm_paddr_t tmp = (ppa & PG_FRAME);
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return phystomach(tmp) | (ppa & ~PG_FRAME);
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}
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static __inline void
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set_phys_to_machine(unsigned long pfn, unsigned long mfn)
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{
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#ifdef notyet
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PANIC_IF(max_mapnr && pfn >= max_mapnr);
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#endif
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if (xen_feature(XENFEAT_auto_translated_physmap)) {
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#ifdef notyet
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PANIC_IF((pfn != mfn && mfn != INVALID_P2M_ENTRY));
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#endif
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return;
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}
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xen_phys_machine[pfn] = mfn;
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}
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#endif /* _XEN_XENPMAP_H_ */
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