| Message ID | 1422658466-23984-2-git-send-email-mathieu.poirier@linaro.org |
|---|---|
| State | New |
| Headers | show |
On 2 February 2015 at 06:50, Will Deacon <will.deacon@arm.com> wrote: > On Fri, Jan 30, 2015 at 10:54:25PM +0000, mathieu.poirier@linaro.org wrote: >> From: Mathieu Poirier <mathieu.poirier@linaro.org> >> >> Adding a lookup function allowing for quick and easy mapping >> between processor HWID (as found, for example) in DT specifications >> and the CPU index known to the kernel. >> >> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> >> --- >> arch/arm64/include/asm/smp_plat.h | 12 ++++++++++++ >> 1 file changed, 12 insertions(+) >> >> diff --git a/arch/arm64/include/asm/smp_plat.h b/arch/arm64/include/asm/smp_plat.h >> index 59e282311b58..8e4b011303b1 100644 >> --- a/arch/arm64/include/asm/smp_plat.h >> +++ b/arch/arm64/include/asm/smp_plat.h >> @@ -19,6 +19,7 @@ >> #ifndef __ASM_SMP_PLAT_H >> #define __ASM_SMP_PLAT_H >> >> +#include <linux/cpumask.h> >> #include <asm/types.h> >> >> struct mpidr_hash { >> @@ -40,4 +41,15 @@ static inline u32 mpidr_hash_size(void) >> extern u64 __cpu_logical_map[NR_CPUS]; >> #define cpu_logical_map(cpu) __cpu_logical_map[cpu] >> >> +static inline int get_logical_index(u64 mpidr) >> +{ >> + int cpu; >> + >> + for (cpu = 0; cpu < nr_cpu_ids; cpu++) >> + if (cpu_logical_map(cpu) == mpidr) >> + return cpu; >> + return -EINVAL; >> +} > > Can you not achieve the same thing using arch_find_n_match_cpu_physical_id > in the coresight code? > > Will I ended up using "of_get_cpu_node()", which uses "arch_find_n_match_cpu_physical_id()". Thanks for pointing this out. Mathieu -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
diff --git a/arch/arm64/include/asm/smp_plat.h b/arch/arm64/include/asm/smp_plat.h index 59e282311b58..8e4b011303b1 100644 --- a/arch/arm64/include/asm/smp_plat.h +++ b/arch/arm64/include/asm/smp_plat.h @@ -19,6 +19,7 @@ #ifndef __ASM_SMP_PLAT_H #define __ASM_SMP_PLAT_H +#include <linux/cpumask.h> #include <asm/types.h> struct mpidr_hash { @@ -40,4 +41,15 @@ static inline u32 mpidr_hash_size(void) extern u64 __cpu_logical_map[NR_CPUS]; #define cpu_logical_map(cpu) __cpu_logical_map[cpu] +static inline int get_logical_index(u64 mpidr) +{ + int cpu; + + for (cpu = 0; cpu < nr_cpu_ids; cpu++) + if (cpu_logical_map(cpu) == mpidr) + return cpu; + return -EINVAL; +} + + #endif /* __ASM_SMP_PLAT_H */