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>

diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h
index 7796519..e9e7a69 100644 (file)
--- 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
index 3b75f19..f6a2625 100644 (file)
--- 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 */