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: Steve Capper <steve.capper@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index b2f9895ecf7b..f4fbbc884893 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -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: