f45a747e59
all the memory it needs, and the plex86 kernel module uses get_user_pages() from the Linux kernel to get at them and pin the few that are needed statically (and later up to a watermark of pages that are needed dynamically). Guest physical memory pages are now dynamically pinned/unpinned. For now, I use a hard limit of 4Megs of pinned pages and a really primitive algorithm to decide which one to unpin when the limit is reached and one needs to be bumped. Seems to work. Though I haven't run into the limit yet since I'm using just a small test program.
64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
/*
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* plex86: run multiple x86 operating systems concurrently
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* Copyright (C) 1999-2003 Kevin P. Lawton
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*
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* system-mon.c: The 'motherboard' logic which connects the entire
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* PC system.
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*
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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; either
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* version 2 of the License, or (at your option) any later version.
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "plex86.h"
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#define IN_MONITOR_SPACE
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#include "monitor.h"
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void
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sysFlushPrintBuf(vm_t *vm)
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{
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CLI();
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vm->mon_request = MonReqFlushPrintBuf;
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vm->guest.__mon2host();
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STI();
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}
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void
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sysRemapMonitor(vm_t *vm)
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{
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CLI();
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vm->mon_request = MonReqRemapMonitor;
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vm->guest.__mon2host();
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STI();
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}
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void
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toHostGuestFault(vm_t *vm, unsigned fault)
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{
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CLI();
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vm->mon_request = MonReqGuestFault;
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vm->guestFaultNo = fault;
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vm->guest.__mon2host();
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STI();
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}
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void
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toHostPinUserPage(vm_t *vm, Bit32u ppi)
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{
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CLI();
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vm->mon_request = MonReqPinUserPage;
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vm->pinReqPPI = ppi;
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vm->guest.__mon2host();
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STI();
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}
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