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author | Jiri Kosina <jkosina@suse.cz> | 2014-02-20 14:54:28 +0100 |
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committer | Jiri Kosina <jkosina@suse.cz> | 2014-02-20 14:54:28 +0100 |
commit | d4263348f796f29546f90802177865dd4379dd0a (patch) | |
tree | adcbdaebae584eee2f32fab95e826e8e49eef385 /arch/powerpc/mm/hash_utils_64.c | |
parent | be873ac782f5ff5ee6675f83929f4fe6737eead2 (diff) | |
parent | 6d0abeca3242a88cab8232e4acd7e2bf088f3bc2 (diff) | |
download | blackbird-op-linux-d4263348f796f29546f90802177865dd4379dd0a.tar.gz blackbird-op-linux-d4263348f796f29546f90802177865dd4379dd0a.zip |
Merge branch 'master' into for-next
Diffstat (limited to 'arch/powerpc/mm/hash_utils_64.c')
-rw-r--r-- | arch/powerpc/mm/hash_utils_64.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index 6176b3cdf579..d766d6ee33fe 100644 --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -169,9 +169,10 @@ static unsigned long htab_convert_pte_flags(unsigned long pteflags) if ((pteflags & _PAGE_USER) && !((pteflags & _PAGE_RW) && (pteflags & _PAGE_DIRTY))) rflags |= 1; - - /* Always add C */ - return rflags | HPTE_R_C; + /* + * Always add "C" bit for perf. Memory coherence is always enabled + */ + return rflags | HPTE_R_C | HPTE_R_M; } int htab_bolt_mapping(unsigned long vstart, unsigned long vend, @@ -206,6 +207,20 @@ int htab_bolt_mapping(unsigned long vstart, unsigned long vend, if (overlaps_kernel_text(vaddr, vaddr + step)) tprot &= ~HPTE_R_N; + /* + * If relocatable, check if it overlaps interrupt vectors that + * are copied down to real 0. For relocatable kernel + * (e.g. kdump case) we copy interrupt vectors down to real + * address 0. Mark that region as executable. This is + * because on p8 system with relocation on exception feature + * enabled, exceptions are raised with MMU (IR=DR=1) ON. Hence + * in order to execute the interrupt handlers in virtual + * mode the vector region need to be marked as executable. + */ + if ((PHYSICAL_START > MEMORY_START) && + overlaps_interrupt_vector_text(vaddr, vaddr + step)) + tprot &= ~HPTE_R_N; + hash = hpt_hash(vpn, shift, ssize); hpteg = ((hash & htab_hash_mask) * HPTES_PER_GROUP); |