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/*
* Copyright (C) 2019-2023 Apple 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 APPLE 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 APPLE 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.
*/
#include "config.h"
#include "CPU.h"
#if (CPU(X86) || CPU(X86_64) || CPU(ARM64)) && OS(DARWIN)
#include <mutex>
#include <sys/sysctl.h>
#endif
#if ENABLE(ASSEMBLER)
#include "MacroAssembler.h"
#endif
namespace JSC {
#if PLATFORM(MAC) || PLATFORM(MACCATALYST)
bool isKernOpenSource()
{
uint32_t val = 0;
size_t valSize = sizeof(val);
return !sysctlbyname("kern.opensource_kernel", &val, &valSize, nullptr, 0) && val;
}
#endif
#if (CPU(X86) || CPU(X86_64)) && OS(DARWIN)
bool isKernTCSMAvailable()
{
if (!Options::useKernTCSM())
return false;
uint32_t val = 0;
size_t valSize = sizeof(val);
int rc = sysctlbyname("kern.tcsm_available", &val, &valSize, nullptr, 0);
if (rc < 0)
return false;
return !!val;
}
bool enableKernTCSM()
{
uint32_t val = 1;
int rc = sysctlbyname("kern.tcsm_enable", nullptr, nullptr, &val, sizeof(val));
if (rc < 0)
return false;
return true;
}
int kernTCSMAwareNumberOfProcessorCores()
{
static std::once_flag onceFlag;
static int result;
std::call_once(onceFlag, [] {
result = WTF::numberOfProcessorCores();
if (result <= 1)
return;
if (isKernTCSMAvailable())
--result;
});
return result;
}
int64_t hwL3CacheSize()
{
int64_t val = 0;
size_t valSize = sizeof(val);
int rc = sysctlbyname("hw.l3cachesize", &val, &valSize, nullptr, 0);
if (rc < 0)
return 0;
return val;
}
int32_t hwPhysicalCPUMax()
{
int32_t val = 0;
size_t valSize = sizeof(val);
int rc = sysctlbyname("hw.physicalcpu_max", &val, &valSize, nullptr, 0);
if (rc < 0)
return 0;
return val;
}
#endif // #if (CPU(X86) || CPU(X86_64)) && OS(DARWIN)
#if CPU(ARM64) && !(CPU(ARM64E) || OS(MAC_OS_X))
bool isARM64_LSE()
{
#if ENABLE(ASSEMBLER)
return MacroAssembler::supportsLSE();
#else
return false;
#endif
}
#endif
#if CPU(ARM64E)
bool isARM64E_FPAC()
{
#if OS(DARWIN)
static std::once_flag onceFlag;
std::call_once(onceFlag, [] {
uint32_t val = 0;
size_t valSize = sizeof(val);
int rc = sysctlbyname("hw.optional.arm.FEAT_FPAC", &val, &valSize, nullptr, 0);
g_jscConfig.canUseFPAC = rc < 0 ? false : !!val;
});
return g_jscConfig.canUseFPAC;
#else
return false;
#endif
}
#endif // CPU(ARM64E)
#if CPU(X86_64)
bool isX86_64_AVX()
{
#if ENABLE(ASSEMBLER)
return MacroAssembler::supportsAVX();
#else
return false;
#endif
}
#endif
} // namespace JSC
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