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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* 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.
*
* $FreeBSD$
*/
/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*
* Copyright 2014 Pluribus Networks Inc.
* Copyright 2018 Joyent, Inc.
* Copyright 2020 Oxide Computer Company
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/pcpu.h>
#include <sys/systm.h>
#include <sys/sysctl.h>
#include <sys/x86_archext.h>
#include <machine/clock.h>
#include <machine/cpufunc.h>
#include <machine/md_var.h>
#include <machine/segments.h>
#include <machine/specialreg.h>
#include <machine/vmm.h>
#include <sys/vmm_kernel.h>
#include "vmm_host.h"
#include "vmm_util.h"
/*
* Return 'true' if the capability 'cap' is enabled in this virtual cpu
* and 'false' otherwise.
*/
bool
vm_cpuid_capability(struct vm *vm, int vcpuid, enum vm_cpuid_capability cap)
{
bool rv;
KASSERT(cap > 0 && cap < VCC_LAST, ("%s: invalid vm_cpu_capability %d",
__func__, cap));
/*
* Simply passthrough the capabilities of the host cpu for now.
*/
rv = false;
switch (cap) {
#ifdef __FreeBSD__
case VCC_NO_EXECUTE:
if (amd_feature & AMDID_NX)
rv = true;
break;
case VCC_FFXSR:
if (amd_feature & AMDID_FFXSR)
rv = true;
break;
case VCC_TCE:
if (amd_feature2 & AMDID2_TCE)
rv = true;
break;
#else
case VCC_NO_EXECUTE:
if (is_x86_feature(x86_featureset, X86FSET_NX))
rv = true;
break;
/* XXXJOY: No kernel detection for FFXR or TCE at present, so ignore */
case VCC_FFXSR:
case VCC_TCE:
break;
#endif
default:
panic("%s: unknown vm_cpu_capability %d", __func__, cap);
}
return (rv);
}
bool
validate_guest_xcr0(uint64_t val, uint64_t limit_mask)
{
/* x87 feature must be enabled */
if ((val & XFEATURE_ENABLED_X87) == 0) {
return (false);
}
/* AVX cannot be enabled without SSE */
if ((val & (XFEATURE_ENABLED_SSE | XFEATURE_ENABLED_AVX)) ==
XFEATURE_ENABLED_SSE) {
return (false);
}
/* No bits should be outside what we dictate to be allowed */
if ((val & ~limit_mask) != 0) {
return (false);
}
return (true);
}
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