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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/arm64/include/asm/cpucaps.h
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/* SPDX-License-Identifier: GPL-2.0-only */

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#ifndef __ASM_CPUCAPS_H

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#define __ASM_CPUCAPS_H

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#include <asm/cpucap-defs.h>

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#ifndef __ASSEMBLY__

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#include <linux/types.h>

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/*

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 * Check whether a cpucap is possible at compiletime.

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 */

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static __always_inline bool

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cpucap_is_possible(const unsigned int cap)

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{

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	compiletime_assert(__builtin_constant_p(cap),

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			   "cap must be a constant");

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	compiletime_assert(cap < ARM64_NCAPS,

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			   "cap must be < ARM64_NCAPS");

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	switch (cap) {

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	case ARM64_HAS_PAN:

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		return IS_ENABLED(CONFIG_ARM64_PAN);

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	case ARM64_HAS_EPAN:

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		return IS_ENABLED(CONFIG_ARM64_EPAN);

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	case ARM64_SVE:

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		return IS_ENABLED(CONFIG_ARM64_SVE);

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	case ARM64_SME:

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	case ARM64_SME2:

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	case ARM64_SME_FA64:

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		return IS_ENABLED(CONFIG_ARM64_SME);

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	case ARM64_HAS_CNP:

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		return IS_ENABLED(CONFIG_ARM64_CNP);

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	case ARM64_HAS_ADDRESS_AUTH:

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	case ARM64_HAS_GENERIC_AUTH:

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		return IS_ENABLED(CONFIG_ARM64_PTR_AUTH);

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	case ARM64_HAS_GIC_PRIO_MASKING:

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		return IS_ENABLED(CONFIG_ARM64_PSEUDO_NMI);

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	case ARM64_MTE:

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		return IS_ENABLED(CONFIG_ARM64_MTE);

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	case ARM64_BTI:

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		return IS_ENABLED(CONFIG_ARM64_BTI);

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	case ARM64_HAS_TLB_RANGE:

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		return IS_ENABLED(CONFIG_ARM64_TLB_RANGE);

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	case ARM64_HAS_S1POE:

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		return IS_ENABLED(CONFIG_ARM64_POE);

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	case ARM64_HAS_GCS:

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		return IS_ENABLED(CONFIG_ARM64_GCS);

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	case ARM64_HAFT:

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		return IS_ENABLED(CONFIG_ARM64_HAFT);

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	case ARM64_UNMAP_KERNEL_AT_EL0:

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		return IS_ENABLED(CONFIG_UNMAP_KERNEL_AT_EL0);

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	case ARM64_WORKAROUND_843419:

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		return IS_ENABLED(CONFIG_ARM64_ERRATUM_843419);

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	case ARM64_WORKAROUND_1742098:

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		return IS_ENABLED(CONFIG_ARM64_ERRATUM_1742098);

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	case ARM64_WORKAROUND_2645198:

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		return IS_ENABLED(CONFIG_ARM64_ERRATUM_2645198);

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	case ARM64_WORKAROUND_2658417:

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		return IS_ENABLED(CONFIG_ARM64_ERRATUM_2658417);

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	case ARM64_WORKAROUND_CAVIUM_23154:

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		return IS_ENABLED(CONFIG_CAVIUM_ERRATUM_23154);

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	case ARM64_WORKAROUND_NVIDIA_CARMEL_CNP:

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		return IS_ENABLED(CONFIG_NVIDIA_CARMEL_CNP_ERRATUM);

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	case ARM64_WORKAROUND_REPEAT_TLBI:

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		return IS_ENABLED(CONFIG_ARM64_WORKAROUND_REPEAT_TLBI);

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	case ARM64_WORKAROUND_SPECULATIVE_SSBS:

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		return IS_ENABLED(CONFIG_ARM64_ERRATUM_3194386);

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	case ARM64_MPAM:

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		/*

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		 * KVM MPAM support doesn't rely on the host kernel supporting MPAM.

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		*/

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		return true;

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	case ARM64_HAS_PMUV3:

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		return IS_ENABLED(CONFIG_HW_PERF_EVENTS);

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	}

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	return true;

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}

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#endif /* __ASSEMBLY__ */

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#endif /* __ASM_CPUCAPS_H */

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