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author | Catalin Marinas <catalin.marinas@arm.com> | 2025-06-25 11:34:32 +0000 |
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committer | Catalin Marinas <catalin.marinas@arm.com> | 2025-06-30 17:42:03 +0100 |
commit | 3eb06f6ce3af65df4e9b3d8fc1d711fbfe7673b3 (patch) | |
tree | 06d3c165354ba6502e4b8d606616c2790a0efbce /net/unix/af_unix.c | |
parent | 19272b37aa4f83ca52bdf9c16d5d81bdd1354494 (diff) |
arm64: cpufeature: Introduce MATCH_ALL_EARLY_CPUS capability type
For system-wide capabilities, the kernel has the SCOPE_SYSTEM type. Such
capabilities are checked once the SMP boot has completed using the
sanitised ID registers. However, there is a need for a new capability
type similar in scope to the system one but with checking performed
locally on each CPU during boot (e.g. based on MIDR_EL1 which is not a
sanitised register).
Introduce ARM64_CPUCAP_MATCH_ALL_EARLY_CPUS which, together with
ARM64_CPUCAP_SCOPE_LOCAL_CPU, ensures that such capability is enabled
only if all early CPUs have it. For ease of use, define
ARM64_CPUCAP_EARLY_LOCAL_CPU_FEATURE which combines SCOPE_LOCAL_CPU,
PERMITTED_FOR_LATE_CPUS and MATCH_ALL_EARLY_CPUS.
Signed-off-by: MikoĊaj Lenczewski <miko.lenczewski@arm.com>
Reviewed-by: Suzuki K Poulose <Suzuki.Poulose@arm.com>
Link: https://lore.kernel.org/r/20250625113435.26849-2-miko.lenczewski@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions