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105 lines
3.0 KiB
C
105 lines
3.0 KiB
C
/*-
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* Copyright (c) 2012 NetApp, Inc.
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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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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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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/types.h>
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#include <machine/vmm.h>
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#include <vmmapi.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#include "bhyverun.h"
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#include "spinup_ap.h"
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static void
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spinup_ap_realmode(struct vmctx *ctx, int newcpu, uint64_t *rip)
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{
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int vector, error;
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uint16_t cs;
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uint64_t desc_base;
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uint32_t desc_limit, desc_access;
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vector = *rip >> PAGE_SHIFT;
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*rip = 0;
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/*
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* Update the %cs and %rip of the guest so that it starts
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* executing real mode code at at 'vector << 12'.
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*/
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error = vm_set_register(ctx, newcpu, VM_REG_GUEST_RIP, *rip);
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assert(error == 0);
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error = vm_get_desc(ctx, newcpu, VM_REG_GUEST_CS, &desc_base,
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&desc_limit, &desc_access);
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assert(error == 0);
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desc_base = vector << PAGE_SHIFT;
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error = vm_set_desc(ctx, newcpu, VM_REG_GUEST_CS,
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desc_base, desc_limit, desc_access);
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assert(error == 0);
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cs = (vector << PAGE_SHIFT) >> 4;
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error = vm_set_register(ctx, newcpu, VM_REG_GUEST_CS, cs);
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assert(error == 0);
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}
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int
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spinup_ap(struct vmctx *ctx, int vcpu, int newcpu, uint64_t rip)
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{
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int error;
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assert(newcpu != 0);
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assert(newcpu < guest_ncpus);
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error = vcpu_reset(ctx, newcpu);
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assert(error == 0);
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fbsdrun_set_capabilities(ctx, newcpu);
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/*
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* Enable the 'unrestricted guest' mode for 'newcpu'.
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*
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* Set up the processor state in power-on 16-bit mode, with the CS:IP
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* init'd to the specified low-mem 4K page.
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*/
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error = vm_set_capability(ctx, newcpu, VM_CAP_UNRESTRICTED_GUEST, 1);
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assert(error == 0);
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spinup_ap_realmode(ctx, newcpu, &rip);
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fbsdrun_addcpu(ctx, vcpu, newcpu, rip);
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return (newcpu);
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}
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