diff options
| author | Jayachandran C <jnair@caviumnetworks.com> | 2019-06-17 23:35:18 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2019-06-25 16:42:09 +0100 |
| commit | dccc9da22dedad203acea355b0e4d946b71172e5 (patch) | |
| tree | f2aa9c5784b49699700577770856f8c77c9a6f45 | |
| parent | ca9503fc9e9812aa6258e55d44edb03eb30fc46f (diff) | |
arm64: Improve parking of stopped CPUs
The current code puts the stopped cpus in an 'yield' instruction loop.
Using a busy loop here is unnecessary, we can use the cpu_park_loop()
function here to do a wfi/wfe.
Signed-off-by: Jayachandran C <jnair@caviumnetworks.com>
Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| -rw-r--r-- | arch/arm64/kernel/smp.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 83cdb0aa2ff1..932461da5dd7 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -850,9 +850,7 @@ static void ipi_cpu_stop(unsigned int cpu) local_daif_mask(); sdei_mask_local_cpu(); - - while (1) - cpu_relax(); + cpu_park_loop(); } #ifdef CONFIG_KEXEC_CORE |