diff options
Diffstat (limited to 'sys/amd64/vmm/x86.c')
| -rw-r--r-- | sys/amd64/vmm/x86.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/sys/amd64/vmm/x86.c b/sys/amd64/vmm/x86.c new file mode 100644 index 0000000..45c4c53 --- /dev/null +++ b/sys/amd64/vmm/x86.c @@ -0,0 +1,113 @@ +/*- + * Copyright (c) 2011 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/types.h> + +#include <machine/cpufunc.h> +#include <machine/specialreg.h> + +#include "x86.h" + +int +x86_emulate_cpuid(uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx) +{ + unsigned int func, regs[4]; + + func = *eax; + + cpuid_count(*eax, *ecx, regs); + + switch(func) { + case CPUID_0000_0000: + case CPUID_0000_0002: + case CPUID_0000_0003: + case CPUID_0000_0004: + case CPUID_0000_000A: + break; + + case CPUID_8000_0000: + case CPUID_8000_0001: + case CPUID_8000_0002: + case CPUID_8000_0003: + case CPUID_8000_0004: + case CPUID_8000_0006: + case CPUID_8000_0007: + case CPUID_8000_0008: + + break; + + case CPUID_0000_0001: + /* + * Override the APIC ID only in ebx + */ + regs[1] &= ~(CPUID_0000_0001_APICID_MASK); + /* + * XXX fixme for MP case, set apicid properly for cpu. + */ + regs[1] |= (0 << CPUID_0000_0001_APICID_SHIFT); + + /* + * Don't expose VMX capability. + * Advertise x2APIC capability. + */ + regs[2] &= ~CPUID_0000_0001_FEAT0_VMX; + regs[2] |= CPUID2_X2APIC; + + /* + * Machine check handling is done in the host. + * Hide MTRR capability. + */ + regs[3] &= ~(CPUID_MCA | CPUID_MCE | CPUID_MTRR); + + break; + + case CPUID_0000_000B: + /* + * XXXSMP fixme + * Processor topology enumeration + */ + regs[0] = 0; + regs[1] = 0; + regs[2] = *ecx & 0xff; + regs[3] = 0; + break; + + default: + return (0); + } + + *eax = regs[0]; + *ebx = regs[1]; + *ecx = regs[2]; + *edx = regs[3]; + return (1); +} + |
