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ec76876660
Cortex-X4 erratum 3194386 and Neoverse-V3 erratum 3312417 are identical, with duplicate Kconfig text and some unsightly ifdeffery. While we try to share code behind CONFIG_ARM64_WORKAROUND_SPECULATIVE_SSBS, having separate options results in a fair amount of boilerplate code, and this will only get worse as we expand the set of affected CPUs. To reduce this boilerplate, unify the two behind a common Kconfig option. This removes the duplicate text and Kconfig logic, and removes the need for the intermediate ARM64_WORKAROUND_SPECULATIVE_SSBS option. The set of affected CPUs is described as a list so that this can easily be extended. I've used ARM64_ERRATUM_3194386 (matching the Neoverse-V3 erratum ID) as the common option, matching the way we use ARM64_ERRATUM_1319367 to cover Cortex-A57 erratum 1319537 and Cortex-A72 erratum 1319367. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: James Morse <james.morse@arm.com> Cc: Will Deacon <wilL@kernel.org> Link: https://lore.kernel.org/r/20240603111812.1514101-5-mark.rutland@arm.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
70 lines
2.0 KiB
C
70 lines
2.0 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 __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_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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}
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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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