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/*-
* Copyright (c) 2012 NetApp, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/types.h>
#include <machine/vmm.h>
#include <vmmapi.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "bhyverun.h"
#include "spinup_ap.h"
static void
spinup_ap_realmode(struct vmctx *ctx, int newcpu, uint64_t *rip)
{
int vector, error;
uint16_t cs;
uint64_t desc_base;
uint32_t desc_limit, desc_access;
vector = *rip >> PAGE_SHIFT;
*rip = 0;
/*
* Update the %cs and %rip of the guest so that it starts
* executing real mode code at at 'vector << 12'.
*/
error = vm_set_register(ctx, newcpu, VM_REG_GUEST_RIP, *rip);
assert(error == 0);
error = vm_get_desc(ctx, newcpu, VM_REG_GUEST_CS, &desc_base,
&desc_limit, &desc_access);
assert(error == 0);
desc_base = vector << PAGE_SHIFT;
error = vm_set_desc(ctx, newcpu, VM_REG_GUEST_CS,
desc_base, desc_limit, desc_access);
assert(error == 0);
cs = (vector << PAGE_SHIFT) >> 4;
error = vm_set_register(ctx, newcpu, VM_REG_GUEST_CS, cs);
assert(error == 0);
}
int
spinup_ap(struct vmctx *ctx, int vcpu, int newcpu, uint64_t rip)
{
int error;
assert(newcpu != 0);
assert(newcpu < guest_ncpus);
error = vcpu_reset(ctx, newcpu);
assert(error == 0);
fbsdrun_set_capabilities(ctx, newcpu);
/*
* Enable the 'unrestricted guest' mode for 'newcpu'.
*
* Set up the processor state in power-on 16-bit mode, with the CS:IP
* init'd to the specified low-mem 4K page.
*/
error = vm_set_capability(ctx, newcpu, VM_CAP_UNRESTRICTED_GUEST, 1);
assert(error == 0);
spinup_ap_realmode(ctx, newcpu, &rip);
fbsdrun_addcpu(ctx, newcpu, rip);
return (newcpu);
}
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