diff options
Diffstat (limited to 'include/linux/irqchip/arm-gic-v3.h')
| -rw-r--r-- | include/linux/irqchip/arm-gic-v3.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h index c0c8a2ef9d90..9001b0bbe878 100644 --- a/include/linux/irqchip/arm-gic-v3.h +++ b/include/linux/irqchip/arm-gic-v3.h @@ -398,6 +398,22 @@ static inline void gic_write_dir(u64 irq) isb(); } +static inline bool gic_enable_sre(void) +{ + u64 val; + + asm volatile("mrs_s %0, " __stringify(ICC_SRE_EL1) : "=r" (val)); + if (val & ICC_SRE_EL1_SRE) + return true; + + val |= ICC_SRE_EL1_SRE; + asm volatile("msr_s " __stringify(ICC_SRE_EL1) ", %0" : : "r" (val)); + isb(); + asm volatile("mrs_s %0, " __stringify(ICC_SRE_EL1) : "=r" (val)); + + return !!(val & ICC_SRE_EL1_SRE); +} + struct irq_domain; int its_cpu_init(void); int its_init(struct device_node *node, struct rdists *rdists, |