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28 lines
1.1 KiB
C
28 lines
1.1 KiB
C
/* Handle AT_HWCAP2. Linux/x86 version.
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Copyright (C) 2023-2025 Free Software Foundation, Inc.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/* The following must match the kernel's <asm/hwcap2.h>. */
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#define HWCAP2_RING3MWAIT (1 << 0)
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#define HWCAP2_FSGSBASE (1 << 1)
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static inline void
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dl_check_hwcap2 (struct cpu_features *cpu_features)
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{
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if ((GLRO(dl_hwcap2) & HWCAP2_FSGSBASE) != 0)
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CPU_FEATURE_SET_ACTIVE (cpu_features, FSGSBASE);
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}
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