mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-09-18 23:09:29 +02:00
Mark Rutland
62e11a7fde
Will notes that the ARM64_WORKAROUND_REPEAT_TLBI name is potentially misleading, and that it would be nice to rename that and add some documentation. See: https://lore.kernel.org/linux-arm-kernel/ajKn_Pt50CmOUrsP@willie-the-truck/ To that end, I've renamed the Kconfig symbol and hwcap from: [CONFIG_]ARM64_WORKAROUND_REPEAT_TLBI ... to: [CONFIG_]ARM64_WORKAROUND_REPEAT_TLBI_SYNC ... and I've added some rationale alongside the Kconfig. As the Kconfig symbol isn't user selectable, the usual 'help' section won't appear in menuconfig, so I've added this as a comment. The rename was scripted with: git grep -l REPEAT_TLBI | while read F; do sed -i '{ s/WORKAROUND_REPEAT_TLBI\>/WORKAROUND_REPEAT_TLBI_SYNC/g }' $F; done Bikeshedding-wise, I considered a few names, including: * ARM64_WORKAROUND_REPEAT_TLBI_SYNC * ARM64_WORKAROUND_TLBI_REPEAT_SYNC * ARM64_WORKAROUND_BROADCAST_TLBI_REPEAT_SYNC ... and I settled on ARM64_WORKAROUND_REPEAT_TLBI_SYNC to try keep things simple, and to avoid unnecessary churn caused by moving definitions to retain alphabetical order. I'm happy to defer to Will and Catalin's preference. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Will Deacon <will@kernel.org>
85 lines
2.4 KiB
C
85 lines
2.4 KiB
C
/* 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 __ASSEMBLER__
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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_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_DISABLE_CNP:
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return IS_ENABLED(CONFIG_ARM64_WORKAROUND_DISABLE_CNP);
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case ARM64_WORKAROUND_REPEAT_TLBI_SYNC:
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return IS_ENABLED(CONFIG_ARM64_WORKAROUND_REPEAT_TLBI_SYNC);
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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_WORKAROUND_4193714:
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return IS_ENABLED(CONFIG_ARM64_ERRATUM_4193714);
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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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case ARM64_HAS_LSUI:
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return IS_ENABLED(CONFIG_ARM64_LSUI);
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}
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return true;
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}
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#endif /* __ASSEMBLER__ */
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#endif /* __ASM_CPUCAPS_H */
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