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powerpc/mm: Add early_[cpu|mmu]_has_feature() 

In later patches, we will be switching CPU and MMU feature checks to
use static keys.

For checks in early boot before jump label is initialized we need a
variant of [cpu|mmu]_has_feature() that doesn't use jump labels.

So create those called, unimaginatively, early_[cpu|mmu]_has_feature().

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Michael Ellerman 2016-07-27 20:48:36 +10:00
parent bab4c8de62
commit a141cca389
2 changed files with 22 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
arch/powerpc/include/asm/cputable.h
View File

@ -577,12 +577,17 @@ enum {
};
#endif /* __powerpc64__ */
static inline bool cpu_has_feature(unsigned long feature)
static inline bool early_cpu_has_feature(unsigned long feature)
{
return !!((CPU_FTRS_ALWAYS & feature) ||
(CPU_FTRS_POSSIBLE & cur_cpu_spec->cpu_features & feature));
}
static inline bool cpu_has_feature(unsigned long feature)
{
return early_cpu_has_feature(feature);
}
#define HBP_NUM 1
#endif /* !__ASSEMBLY__ */

17
arch/powerpc/include/asm/mmu.h
View File

@ -135,11 +135,16 @@ enum {
0,
};
static inline bool mmu_has_feature(unsigned long feature)
static inline bool early_mmu_has_feature(unsigned long feature)
{
return !!(MMU_FTRS_POSSIBLE & cur_cpu_spec->mmu_features & feature);
}
static inline bool mmu_has_feature(unsigned long feature)
{
return early_mmu_has_feature(feature);
}
static inline void mmu_clear_feature(unsigned long feature)
{
cur_cpu_spec->mmu_features &= ~feature;
@ -168,11 +173,21 @@ static inline bool radix_enabled(void)
{
return mmu_has_feature(MMU_FTR_TYPE_RADIX);
}
static inline bool early_radix_enabled(void)
{
return early_mmu_has_feature(MMU_FTR_TYPE_RADIX);
}
#else
static inline bool radix_enabled(void)
{
return false;
}
static inline bool early_radix_enabled(void)
{
return false;
}
#endif
#endif /* !__ASSEMBLY__ */