mirror of
https://github.com/linuxkit/linuxkit.git
synced 2026-04-12 23:43:48 +00:00
61 lines
2.0 KiB
C
61 lines
2.0 KiB
C
/*-
|
|
* Copyright (c) 2012 NetApp, Inc.
|
|
* Copyright (c) 2015 xhyve developers
|
|
* 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 <stdint.h>
|
|
#include <sys/sysctl.h>
|
|
#include <xhyve/support/misc.h>
|
|
#include <xhyve/support/specialreg.h>
|
|
#include <xhyve/vmm/vmm.h>
|
|
#include <xhyve/vmm/vmm_host.h>
|
|
|
|
static struct xsave_limits vmm_xsave_limits;
|
|
|
|
void
|
|
vmm_host_state_init(void)
|
|
{
|
|
uint32_t avx1_0, regs[4];
|
|
size_t ln;
|
|
|
|
vmm_xsave_limits.xsave_enabled = 0;
|
|
|
|
ln = sizeof(uint32_t);
|
|
if (!sysctlbyname("hw.optional.avx1_0", &avx1_0, &ln, NULL, 0) && avx1_0) {
|
|
cpuid_count(0xd, 0x0, regs);
|
|
vmm_xsave_limits.xsave_enabled = 1;
|
|
vmm_xsave_limits.xcr0_allowed = XFEATURE_AVX;
|
|
vmm_xsave_limits.xsave_max_size = regs[1];
|
|
}
|
|
}
|
|
|
|
const struct xsave_limits *
|
|
vmm_get_xsave_limits(void)
|
|
{
|
|
return (&vmm_xsave_limits);
|
|
}
|