diff options
| author | Marc Zyngier <maz@kernel.org> | 2021-06-15 12:12:25 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-06-17 18:00:39 +0100 |
| commit | d4dc10277255afc303de4f00cbee0b9ce74d870f (patch) | |
| tree | dddee38004ed7d6c2e11f5a6d2b85e4d423ca045 /arch/arm64/kernel/process.c | |
| parent | 8848f0665b3cd4fbb3107b384f5205380c90634d (diff) | |
| download | linux-d4dc10277255afc303de4f00cbee0b9ce74d870f.tar.bz2 | |
arm64: Convert cpu_do_idle() to using cpuidle context helpers
Now that we have helpers that are aware of the pseudo-NMI
feature, introduce them to cpu_do_idle(). This allows for
some nice cleanup.
No functional change intended.
Tested-by: Valentin Schneider <valentin.schneider@arm.com>
Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210615111227.2454465-3-maz@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/kernel/process.c')
| -rw-r--r-- | arch/arm64/kernel/process.c | 41 |
1 files changed, 9 insertions, 32 deletions
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index b4bb67f17a2c..b715c6b2558f 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -46,9 +46,9 @@ #include <linux/prctl.h> #include <asm/alternative.h> -#include <asm/arch_gicv3.h> #include <asm/compat.h> #include <asm/cpufeature.h> +#include <asm/cpuidle.h> #include <asm/cacheflush.h> #include <asm/exec.h> #include <asm/fpsimd.h> @@ -74,33 +74,6 @@ EXPORT_SYMBOL_GPL(pm_power_off); void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd); -static void noinstr __cpu_do_idle(void) -{ - dsb(sy); - wfi(); -} - -static void noinstr __cpu_do_idle_irqprio(void) -{ - unsigned long pmr; - unsigned long daif_bits; - - daif_bits = read_sysreg(daif); - write_sysreg(daif_bits | PSR_I_BIT | PSR_F_BIT, daif); - - /* - * Unmask PMR before going idle to make sure interrupts can - * be raised. - */ - pmr = gic_read_pmr(); - gic_write_pmr(GIC_PRIO_IRQON | GIC_PRIO_PSR_I_SET); - - __cpu_do_idle(); - - gic_write_pmr(pmr); - write_sysreg(daif_bits, daif); -} - /* * cpu_do_idle() * @@ -112,10 +85,14 @@ static void noinstr __cpu_do_idle_irqprio(void) */ void noinstr cpu_do_idle(void) { - if (system_uses_irq_prio_masking()) - __cpu_do_idle_irqprio(); - else - __cpu_do_idle(); + struct arm_cpuidle_irq_context context; + + arm_cpuidle_save_irq_context(&context); + + dsb(sy); + wfi(); + + arm_cpuidle_restore_irq_context(&context); } /* |