Commit d964b722 authored by Will Deacon's avatar Will Deacon
Browse files

arm64: alternatives: add cpu feature for lse atomics



Add a CPU feature for the LSE atomic instructions, so that they can be
patched in at runtime when we detect that they are supported.
Reviewed-by: default avatarSteve Capper <steve.capper@arm.com>
Reviewed-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent 40a1db24
......@@ -26,8 +26,9 @@
#define ARM64_WORKAROUND_845719 2
#define ARM64_HAS_SYSREG_GIC_CPUIF 3
#define ARM64_HAS_PAN 4
#define ARM64_CPU_FEAT_LSE_ATOMICS 5
#define ARM64_NCAPS 5
#define ARM64_NCAPS 6
#ifndef __ASSEMBLY__
......
......@@ -284,6 +284,7 @@ static void __init setup_processor(void)
default:
case 2:
elf_hwcap |= HWCAP_ATOMICS;
cpus_set_cap(ARM64_CPU_FEAT_LSE_ATOMICS);
case 1:
/* RESERVED */
case 0:
......
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