diff options
| author | Huacai Chen <chenhuacai@loongson.cn> | 2023-06-29 15:58:43 +0300 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2023-06-29 15:58:43 +0300 |
| commit | f6f0c9a74a48448583c3cb0f3f067bc3fe0f13c6 (patch) | |
| tree | e31359d5a5de9d228a03ba15ca70a3855586c902 /arch/loongarch/include | |
| parent | 616500232e632dba8b03981eeccadacf2fbf1c30 (diff) | |
| download | linux-f6f0c9a74a48448583c3cb0f3f067bc3fe0f13c6.tar.xz | |
LoongArch: Add SMT (Simultaneous Multi-Threading) support
Loongson-3A6000 has SMT (Simultaneous Multi-Threading) support, each
physical core has two logical cores (threads). This patch add SMT probe
and scheduler support via ACPI PPTT.
If SCHED_SMT enabled, Loongson-3A6000 is treated as 4 cores, 8 threads;
If SCHED_SMT disabled, Loongson-3A6000 is treated as 8 cores, 8 threads.
Remove smp_num_siblings to support HMP (Heterogeneous Multi-Processing).
Signed-off-by: Liupu Wang <wangliupu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/include')
| -rw-r--r-- | arch/loongarch/include/asm/acpi.h | 9 | ||||
| -rw-r--r-- | arch/loongarch/include/asm/cpu-info.h | 1 |
2 files changed, 10 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/acpi.h b/arch/loongarch/include/asm/acpi.h index 976a810352c6..5c78b5d2bfb7 100644 --- a/arch/loongarch/include/asm/acpi.h +++ b/arch/loongarch/include/asm/acpi.h @@ -13,6 +13,7 @@ extern int acpi_strict; extern int acpi_disabled; extern int acpi_pci_disabled; extern int acpi_noirq; +extern int pptt_enabled; #define acpi_os_ioremap acpi_os_ioremap void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size); @@ -30,6 +31,14 @@ static inline bool acpi_has_cpu_in_madt(void) } extern struct list_head acpi_wakeup_device_list; +extern struct acpi_madt_core_pic acpi_core_pic[NR_CPUS]; + +extern int __init parse_acpi_topology(void); + +static inline u32 get_acpi_id_for_cpu(unsigned int cpu) +{ + return acpi_core_pic[cpu_logical_map(cpu)].processor_id; +} #endif /* !CONFIG_ACPI */ diff --git a/arch/loongarch/include/asm/cpu-info.h b/arch/loongarch/include/asm/cpu-info.h index cd73a6f57fe3..900589cb159d 100644 --- a/arch/loongarch/include/asm/cpu-info.h +++ b/arch/loongarch/include/asm/cpu-info.h @@ -54,6 +54,7 @@ struct cpuinfo_loongarch { struct cache_desc cache_leaves[CACHE_LEAVES_MAX]; int core; /* physical core number in package */ int package;/* physical package number */ + int global_id; /* physical global thread number */ int vabits; /* Virtual Address size in bits */ int pabits; /* Physical Address size in bits */ unsigned int ksave_mask; /* Usable KSave mask. */ |