diff options
Diffstat (limited to 'arch/riscv/include/asm/acpi.h')
| -rw-r--r-- | arch/riscv/include/asm/acpi.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/acpi.h b/arch/riscv/include/asm/acpi.h index 6e13695120bc..a4b9e60f747c 100644 --- a/arch/riscv/include/asm/acpi.h +++ b/arch/riscv/include/asm/acpi.h @@ -12,6 +12,8 @@ #ifndef _ASM_ACPI_H #define _ASM_ACPI_H +#include <linux/cpuidle.h> + /* Basic configuration for ACPI */ #ifdef CONFIG_ACPI @@ -71,6 +73,23 @@ int acpi_get_riscv_isa(struct acpi_table_header *table, void acpi_get_cbo_block_size(struct acpi_table_header *table, u32 *cbom_size, u32 *cboz_size, u32 *cbop_size); + +/* + * RISC-V Functional Fixed Hardware Specification Version v1.0.1, + * Chapter 3.1.2, Table 4: Arch. Context Lost Flags + */ +#define RISCV_LPI_HART_TIMER_CTXT_LOST BIT(0) + +static inline unsigned int arch_get_idle_state_flags(u32 arch_flags) +{ + if (arch_flags & RISCV_LPI_HART_TIMER_CTXT_LOST) + return CPUIDLE_FLAG_TIMER_STOP; + + return 0; +} + +#define arch_get_idle_state_flags arch_get_idle_state_flags + #else static inline void acpi_init_rintc_map(void) { } static inline struct acpi_madt_rintc *acpi_cpu_get_madt_rintc(int cpu) |