vmm/core/cpuid.c

/*
 * Copyright (c) 2007, 2008 University of Tsukuba
 * 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.
 * 3. Neither the name of the University of Tsukuba nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT OWNER 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.
 */

#include <core/initfunc.h>
#include "cpuid.h"
#include "current.h"
#include "panic.h"

void
call_cpuid (u32 ia, u32 ic, u32 *oa, u32 *ob, u32 *oc, u32 *od)
{
        asm_cpuid (ia, ic, oa, ob, oc, od);
        if (ia == 1) {
                /* *ob &= ~CPUID_1_EBX_NUMOFLP_MASK; */
                /* *ob |= ~CPUID_1_EBX_NUMOFLP_1; */
                *oc &= ~CPUID_1_ECX_VMX_BIT;
                /* *od &= ~CPUID_1_EDX_PAE_BIT; */
                /* *od &= ~CPUID_1_EDX_APIC_BIT; */
        } else if (ia == 4) {
                /* *oa &= ~CPUID_4_EAX_NUMOFTHREADS_MASK; */
                /* *oa &= ~CPUID_4_EAX_NUMOFCORES_MASK; */
        }
}