powerpc/mm: Use 32bit array for slb cache

With larger vsid we need to track more bits of ESID in slb cache for slb invalidate. Reviewed-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
git-mirror · Sep 17, 2012 · 735cafc · 735cafc
1 parent ac8dc28
commit 735cafc
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diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h
@@ -100,7 +100,7 @@ struct paca_struct {
 	/* SLB related definitions */
 	u16 vmalloc_sllp;
 	u16 slb_cache_ptr;
-	u16 slb_cache[SLB_CACHE_ENTRIES];
+	u32 slb_cache[SLB_CACHE_ENTRIES];
 #endif /* CONFIG_PPC_STD_MMU_64 */
 
 #ifdef CONFIG_PPC_BOOK3E

diff --git a/arch/powerpc/mm/slb_low.S b/arch/powerpc/mm/slb_low.S
@@ -270,10 +270,10 @@ _GLOBAL(slb_compare_rr_to_size)
 	bge	1f
 
 	/* still room in the slb cache */
-	sldi	r11,r3,1		/* r11 = offset * sizeof(u16) */
-	rldicl	r10,r10,36,28		/* get low 16 bits of the ESID */
-	add	r11,r11,r13		/* r11 = (u16 *)paca + offset */
-	sth	r10,PACASLBCACHE(r11)	/* paca->slb_cache[offset] = esid */
+	sldi	r11,r3,2		/* r11 = offset * sizeof(u32) */
+	srdi    r10,r10,28		/* get the 36 bits of the ESID */
+	add	r11,r11,r13		/* r11 = (u32 *)paca + offset */
+	stw	r10,PACASLBCACHE(r11)	/* paca->slb_cache[offset] = esid */
 	addi	r3,r3,1			/* offset++ */
 	b	2f
 1:					/* offset >= SLB_CACHE_ENTRIES */