diff options
| author | Huacai Chen <chenhuacai@loongson.cn> | 2024-11-22 15:47:53 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2024-11-26 18:06:04 +0800 |
| commit | 704f06eeff65f898364981e6803e587cd941a3ed (patch) | |
| tree | f596635ceb1a77489d3dc3185007d6330a256642 /arch/loongarch | |
| parent | be2ea982bb83a34003909bdfcac1d107339f5dcf (diff) | |
LoongArch: Allow to enable PREEMPT_LAZY
LoongArch has supported PREEMPT_RT now. It uses GENERIC_ENTRY, so just
add the TIF bit (TIF_NEED_RESCHED_LAZY) related definitions and select
the Kconfig symbol (ARCH_HAS_PREEMPT_LAZY) is enough to make it go.
Signed-off-by: Xi Ruoyao <xry111@xry111.site>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch')
| -rw-r--r-- | arch/loongarch/Kconfig | 1 | ||||
| -rw-r--r-- | arch/loongarch/include/asm/thread_info.h | 8 |
2 files changed, 6 insertions, 3 deletions
diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index d5d3679057a1..dae3a9104ca6 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -23,6 +23,7 @@ config LOONGARCH select ARCH_HAS_KERNEL_FPU_SUPPORT if CPU_HAS_FPU select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE + select ARCH_HAS_PREEMPT_LAZY select ARCH_HAS_PTE_DEVMAP select ARCH_HAS_PTE_SPECIAL select ARCH_HAS_SET_MEMORY diff --git a/arch/loongarch/include/asm/thread_info.h b/arch/loongarch/include/asm/thread_info.h index 8bf0e6f51546..4f5a9441754e 100644 --- a/arch/loongarch/include/asm/thread_info.h +++ b/arch/loongarch/include/asm/thread_info.h @@ -66,8 +66,9 @@ register unsigned long current_stack_pointer __asm__("$sp"); * - pending work-to-be-done flags are in LSW * - other flags in MSW */ -#define TIF_SIGPENDING 1 /* signal pending */ -#define TIF_NEED_RESCHED 2 /* rescheduling necessary */ +#define TIF_NEED_RESCHED 0 /* rescheduling necessary */ +#define TIF_NEED_RESCHED_LAZY 1 /* lazy rescheduling necessary */ +#define TIF_SIGPENDING 2 /* signal pending */ #define TIF_NOTIFY_RESUME 3 /* callback before returning to user */ #define TIF_NOTIFY_SIGNAL 4 /* signal notifications exist */ #define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */ @@ -88,8 +89,9 @@ register unsigned long current_stack_pointer __asm__("$sp"); #define TIF_LBT_CTX_LIVE 20 /* LBT context must be preserved */ #define TIF_PATCH_PENDING 21 /* pending live patching update */ -#define _TIF_SIGPENDING (1<<TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) +#define _TIF_NEED_RESCHED_LAZY (1<<TIF_NEED_RESCHED_LAZY) +#define _TIF_SIGPENDING (1<<TIF_SIGPENDING) #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) #define _TIF_NOTIFY_SIGNAL (1<<TIF_NOTIFY_SIGNAL) #define _TIF_NOHZ (1<<TIF_NOHZ) |