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powerpc/8xx: CONFIG_DEBUG_PAGEALLOC requires ITLBmiss for kernel addresses

When CONFIG_DEBUG_PAGEALLOC is activated, the initial TLB mapping gets
flushed to track accesses to wrong areas. Therefore, kernel addresses
will also generate ITLB misses.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <oss@buserror.net>
Christophe Leroy 9 years ago
parent
501ea76687
commit
921fff351c
1 changed files with 1 additions and 1 deletions
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  1. 1 1
      arch/powerpc/kernel/head_8xx.S

+ 1 - 1
arch/powerpc/kernel/head_8xx.S
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@@ -329,7 +329,7 @@ InstructionTLBMiss:
 
 	/* If we are faulting a kernel address, we have to use the
 
 	/* If we are faulting a kernel address, we have to use the
 
 	 * kernel page tables.
 
 	 * kernel page tables.
 
 	 */
 
 	 */
 
-#ifdef CONFIG_MODULES
 
+#if defined(CONFIG_MODULES) || defined (CONFIG_DEBUG_PAGEALLOC)
 
 	/* Only modules will cause ITLB Misses as we always
 
 	/* Only modules will cause ITLB Misses as we always
 
 	 * pin the first 8MB of kernel memory */
 
 	 * pin the first 8MB of kernel memory */
 
 	mfspr	r11, SPRN_SRR0	/* Get effective address of fault */
 
 	mfspr	r11, SPRN_SRR0	/* Get effective address of fault */