88 lines
2.3 KiB
C
88 lines
2.3 KiB
C
/*-
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* Copyright (c) 2013 Anish Gupta (akgupt3@gmail.com)
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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 unmodified, this list of conditions, and the following
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* 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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*
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/sysctl.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <vm/vm_extern.h>
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#include <machine/pmap.h>
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#include "npt.h"
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SYSCTL_DECL(_hw_vmm);
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SYSCTL_NODE(_hw_vmm, OID_AUTO, npt, CTLFLAG_RW, NULL, NULL);
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static int npt_flags;
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SYSCTL_INT(_hw_vmm_npt, OID_AUTO, pmap_flags, CTLFLAG_RD,
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&npt_flags, 0, NULL);
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#define NPT_IPIMASK 0xFF
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/*
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* AMD nested page table init.
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*/
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int
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svm_npt_init(int ipinum)
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{
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int enable_superpage = 1;
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npt_flags = ipinum & NPT_IPIMASK;
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TUNABLE_INT_FETCH("hw.vmm.npt.enable_superpage", &enable_superpage);
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if (enable_superpage)
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npt_flags |= PMAP_PDE_SUPERPAGE;
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return (0);
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}
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static int
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npt_pinit(pmap_t pmap)
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{
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return (pmap_pinit_type(pmap, PT_RVI, npt_flags));
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}
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struct vmspace *
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svm_npt_alloc(vm_offset_t min, vm_offset_t max)
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{
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return (vmspace_alloc(min, max, npt_pinit));
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}
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void
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svm_npt_free(struct vmspace *vmspace)
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{
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vmspace_free(vmspace);
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}
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