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powerpc/lib/feature-fixups: use raw_patch_instruction()

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feature fixups need to use patch_instruction() early in the boot,
even before the code is relocated to its final address, requiring
patch_instruction() to use PTRRELOC() in order to address data.

But feature fixups applies on code before it is set to read only,
even for modules. Therefore, feature fixups can use
raw_patch_instruction() instead.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy
2017-11-24 08:31:09 +01:00
committed by Michael Ellerman
parent 8cf4c05712
commit 8183d99f4a
3 changed files with 7 additions and 6 deletions
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8
arch/powerpc/lib/feature-fixups.c
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@@ -62,7 +62,7 @@ static int patch_alt_instruction(unsigned int *src, unsigned int *dest,
}
}
patch_instruction(dest, instr);
raw_patch_instruction(dest, instr);
return 0;
}
@@ -91,7 +91,7 @@ static int patch_feature_section(unsigned long value, struct fixup_entry *fcur)
}
for (; dest < end; dest++)
patch_instruction(dest, PPC_INST_NOP);
raw_patch_instruction(dest, PPC_INST_NOP);
return 0;
}
@@ -129,7 +129,7 @@ void do_lwsync_fixups(unsigned long value, void *fixup_start, void *fixup_end)
for (; start < end; start++) {
dest = (void *)start + *start;
patch_instruction(dest, PPC_INST_LWSYNC);
raw_patch_instruction(dest, PPC_INST_LWSYNC);
}
}
@@ -147,7 +147,7 @@ static void do_final_fixups(void)
length = (__end_interrupts - _stext) / sizeof(int);
while (length--) {
patch_instruction(dest, *src);
raw_patch_instruction(dest, *src);
src++;
dest++;
}