98a8e8b486
(domU only). PAE support is enabled by 'options PAE', see the new XEN3PAE_DOMU
and INSTALL_XEN3PAE_DOMU kernel config files.
See the comments in arch/i386/include/{pte.h,pmap.h} to see how it works.
In short, we still handle it as a 2-level MMU, with the second level page
directory being 4 pages in size. pmap switching is done by switching the
L2 pages in the L3 entries, instead of loading %cr3. This is almost required
by Xen, which handle the last L2 page (the one mapping 0xc0000000 - 0xffffffff)
in a very special way. But this approach should also work for native PAE
support if ever supported (in fact, the pmap should almost suport native
PAE, what's missing is bootstrap code in locore.S).
156 lines
4.6 KiB
C
156 lines
4.6 KiB
C
/* $NetBSD: xenpmap.h,v 1.19 2008/01/23 19:46:45 bouyer Exp $ */
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/*
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*
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* Copyright (c) 2004 Christian Limpach.
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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 "opt_xen.h"
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#define INVALID_P2M_ENTRY (~0UL)
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void xpq_queue_machphys_update(paddr_t, paddr_t);
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void xpq_queue_invlpg(vaddr_t);
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void xpq_queue_pte_update(paddr_t, pt_entry_t);
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void xpq_queue_pt_switch(paddr_t);
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void xpq_flush_queue(void);
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void xpq_queue_set_ldt(vaddr_t, uint32_t);
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void xpq_queue_tlb_flush(void);
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void xpq_queue_pin_table(paddr_t);
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void xpq_queue_unpin_table(paddr_t);
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int xpq_update_foreign(paddr_t, pt_entry_t, int);
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extern unsigned long *xpmap_phys_to_machine_mapping;
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/*
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* On Xen-2, the start of the day virual memory starts at KERNTEXTOFF
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* (0xc0100000). On Xen-3 for domain0 it starts at KERNBASE (0xc0000000).
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* So the offset between physical and virtual address is different on
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* Xen-2 and Xen-3 for domain0.
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* starting with xen-3.0.2, we can add notes so that virual memory starts
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* at KERNBASE for domU as well.
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*/
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#if defined(XEN3) && (defined(DOM0OPS) || !defined(XEN_COMPAT_030001))
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#define XPMAP_OFFSET 0
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#else
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#define XPMAP_OFFSET (KERNTEXTOFF - KERNBASE)
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#endif
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static __inline paddr_t
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xpmap_mtop(paddr_t mpa)
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{
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return ((machine_to_phys_mapping[mpa >> PAGE_SHIFT] << PAGE_SHIFT) +
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XPMAP_OFFSET) | (mpa & ~PG_FRAME);
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}
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static __inline paddr_t
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xpmap_mtop_masked(paddr_t mpa)
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{
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return ((machine_to_phys_mapping[mpa >> PAGE_SHIFT] << PAGE_SHIFT) +
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XPMAP_OFFSET);
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}
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static __inline paddr_t
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xpmap_ptom(paddr_t ppa)
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{
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return (((paddr_t)xpmap_phys_to_machine_mapping[(ppa -
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XPMAP_OFFSET) >> PAGE_SHIFT]) << PAGE_SHIFT)
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| (ppa & ~PG_FRAME);
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}
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static __inline paddr_t
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xpmap_ptom_masked(paddr_t ppa)
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{
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return (((paddr_t)xpmap_phys_to_machine_mapping[(ppa -
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XPMAP_OFFSET) >> PAGE_SHIFT]) << PAGE_SHIFT);
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}
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#ifdef XEN3
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static inline void
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MULTI_update_va_mapping(
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multicall_entry_t *mcl, vaddr_t va,
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pt_entry_t new_val, unsigned long flags)
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{
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mcl->op = __HYPERVISOR_update_va_mapping;
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mcl->args[0] = va;
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#if defined(__x86_64__)
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mcl->args[1] = new_val;
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mcl->args[2] = flags;
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#else
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mcl->args[1] = (new_val & 0xffffffff);
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#ifdef PAE
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mcl->args[2] = (new_val >> 32);
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#else
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mcl->args[2] = 0;
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#endif
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mcl->args[3] = flags;
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#endif
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}
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static inline void
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MULTI_update_va_mapping_otherdomain(
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multicall_entry_t *mcl, vaddr_t va,
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pt_entry_t new_val, unsigned long flags, domid_t domid)
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{
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mcl->op = __HYPERVISOR_update_va_mapping_otherdomain;
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mcl->args[0] = va;
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#if defined(__x86_64__)
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mcl->args[1] = new_val;
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mcl->args[2] = flags;
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mcl->args[3] = domid;
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#else
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mcl->args[1] = (new_val & 0xffffffff);
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#ifdef PAE
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mcl->args[2] = (new_val >> 32);
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#else
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mcl->args[2] = 0;
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#endif
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mcl->args[3] = flags;
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mcl->args[4] = domid;
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#endif
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}
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#if defined(__x86_64__)
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#define MULTI_UVMFLAGS_INDEX 2
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#define MULTI_UVMDOMID_INDEX 3
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#else
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#define MULTI_UVMFLAGS_INDEX 3
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#define MULTI_UVMDOMID_INDEX 4
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#endif
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#if defined(__x86_64__)
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void xen_set_user_pgd(paddr_t);
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#endif
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#endif /* XEN3 */
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#endif /* _XEN_XENPMAP_H_ */
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