freebsd-skq/usr.sbin/bhyve/xmsr.c
neel 0601994645 Ignore writes to microcode update MSR. This MSR is accessed by RHEL7 guest.
Add KTR tracepoints to annotate wrmsr and rdmsr VM exits.
2014-04-30 02:08:27 +00:00

64 lines
1.9 KiB
C

/*-
* 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/vmm.h>
#include <vmmapi.h>
#include <stdio.h>
#include <stdlib.h>
#include "xmsr.h"
int
emulate_wrmsr(struct vmctx *ctx, int vcpu, uint32_t code, uint64_t val)
{
switch (code) {
case 0xd04: /* Sandy Bridge uncore PMC MSRs */
case 0xc24:
return (0);
case 0x79:
return (0); /* IA32_BIOS_UPDT_TRIG MSR */
default:
break;
}
return (-1);
}
int
emulate_rdmsr(struct vmctx *ctx, int vcpu, uint32_t code, uint64_t *val)
{
return (-1);
}