mirror of
https://github.com/intel/linux-sgx
synced 2026-06-08 14:49:32 +00:00
Li, Xun
75 lines
2.4 KiB
C++
75 lines
2.4 KiB
C++
/*
|
|
* Copyright (C) 2011-2020 Intel Corporation. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * 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.
|
|
* * Neither the name of Intel Corporation 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 "xsave.h"
|
|
#include "util.h"
|
|
#include "se_detect.h"
|
|
#include "cpuid.h"
|
|
|
|
|
|
#define XFRM_YMM_BITMASK 0x00000004
|
|
|
|
uint32_t g_xsave_enabled = 0;
|
|
#ifdef SE_SIM
|
|
uint32_t g_xsave_mask_low = 0xFFFFFFFF;
|
|
uint32_t g_xsave_mask_high = 0xFFFFFFFF;
|
|
#endif
|
|
|
|
extern "C" void set_xsave_info(int xsave_size, int flag);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// init_xsave_info
|
|
void init_xsave_info()
|
|
{
|
|
int xsave_size = FXSAVE_SIZE;
|
|
uint64_t xcr0 = 0;
|
|
if(try_read_xcr0(&xcr0))
|
|
{
|
|
// CPUID function 0DH, sub-function 0
|
|
// EBX enums the size (in bytes) required by XSAVE for all the components currently set in XCR0
|
|
int cpu_info[4] = {0};
|
|
__cpuid(cpu_info, 0xD);
|
|
xsave_size = cpu_info[1];
|
|
g_xsave_enabled = 1;
|
|
}
|
|
set_xsave_info(xsave_size, (xcr0 & XFRM_YMM_BITMASK) ? 1 : 0);
|
|
}
|
|
|