diff options
| author |   Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2020-07-09 08:59:36 +0530 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2020-07-20 22:57:58 +1000 |
| commit | d3cd91fb8d2e202cf8ebb6f271898aaf37ecda8f (patch) | |
| tree | 437b21687e27c4730add32f1ac70f54bff231024 /arch/powerpc/include/asm/mmu.h | |
| parent | powerpc/book3s64/pkeys: Mark all the pkeys above max pkey as reserved (diff) | |
| download | linux-dev-d3cd91fb8d2e202cf8ebb6f271898aaf37ecda8f.tar.xz linux-dev-d3cd91fb8d2e202cf8ebb6f271898aaf37ecda8f.zip | |
powerpc/book3s64/pkeys: Add MMU_FTR_PKEY
Parse storage keys related device tree entry in early_init_devtree
and enable MMU feature MMU_FTR_PKEY if pkeys are supported.
MMU feature is used instead of CPU feature because this enables us
to group MMU_FTR_KUAP and MMU_FTR_PKEY in asm feature fixup code.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200709032946.881753-14-aneesh.kumar@linux.ibm.com
Diffstat (limited to 'arch/powerpc/include/asm/mmu.h')
| -rw-r--r-- | arch/powerpc/include/asm/mmu.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h index 884d51995934..17cbaf132631 100644 --- a/arch/powerpc/include/asm/mmu.h +++ b/arch/powerpc/include/asm/mmu.h @@ -28,6 +28,11 @@ * Individual features below. */ +/* + * Support for memory protection keys. + */ +#define MMU_FTR_PKEY ASM_CONST(0x00000800) + /* Guest Translation Shootdown Enable */ #define MMU_FTR_GTSE ASM_CONST(0x00001000) @@ -181,6 +186,9 @@ enum { MMU_FTR_RADIX_KUAP | #endif /* CONFIG_PPC_KUAP */ #endif /* CONFIG_PPC_RADIX_MMU */ +#ifdef CONFIG_PPC_MEM_KEYS + MMU_FTR_PKEY | +#endif 0, }; @@ -360,6 +368,8 @@ extern void setup_initial_memory_limit(phys_addr_t first_memblock_base, phys_addr_t first_memblock_size); static inline void mmu_early_init_devtree(void) { } +static inline void pkey_early_init_devtree(void) {} + extern void *abatron_pteptrs[2]; #endif /* __ASSEMBLY__ */ #endif |