[POWERPC] Only use H_BULK_REMOVE if the firmware supports it

The previous patch changing pSeries to use H_BULK_REMOVE broke the
JS20 blade, where the firmware doesn't support H_BULK_REMOVE.  This
adds a firmware check so that on machines that don't have H_BULK_REMOVE,
we just use the H_REMOVE call as before.

Signed-off-by: Paul Mackerras <paulus@samba.org>

3 files changed, 16 insertions, 8 deletions

diff --git a/arch/powerpc/platforms/pseries/firmware.c b/arch/powerpc/platforms/pseries/firmware.c
index 1c7b2baa5f73..90522e3c9d46 100644
--- a/arch/powerpc/platforms/pseries/firmware.c
+++ b/arch/powerpc/platforms/pseries/firmware.c
@@ -59,6 +59,7 @@ firmware_features_table[FIRMWARE_MAX_FEATURES] = {
         {FW_FEATURE_XDABR,              "hcall-xdabr"},
         {FW_FEATURE_MULTITCE,           "hcall-multi-tce"},
         {FW_FEATURE_SPLPAR,             "hcall-splpar"},
+        {FW_FEATURE_BULK_REMOVE,        "hcall-bulk"},
 };
 
 /* Build up the firmware features bitmask using the contents of
diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
index 5a684fbd8f27..7496005566ef 100644
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -516,7 +516,7 @@ static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long va,
 static void pSeries_lpar_flush_hash_range(unsigned long number, int local)
 {
         unsigned long i, pix, rc;
-        unsigned long flags;
+        unsigned long flags = 0;
         struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch);
         int lock_tlbie = !cpu_has_feature(CPU_FTR_LOCKLESS_TLBIE);
         unsigned long param[9];
@@ -540,16 +540,22 @@ static void pSeries_lpar_flush_hash_range(unsigned long number, int local)
                                 hash = ~hash;
                         slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
                         slot += hidx & _PTEIDX_GROUP_IX;
-                        param[pix] = HBR_REQUEST | HBR_AVPN | slot;
-                        param[pix+1] = hpte_encode_v(va, psize) & HPTE_V_AVPN;
-                        pix += 2;
-                        if (pix == 8) {
-                                rc = plpar_hcall9(H_BULK_REMOVE, param,
+                        if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) {
+                                pSeries_lpar_hpte_invalidate(slot, va, psize,
+                                                             local);
+                        } else {
+                                param[pix] = HBR_REQUEST | HBR_AVPN | slot;
+                                param[pix+1] = hpte_encode_v(va, psize) &
+                                        HPTE_V_AVPN;
+                                pix += 2;
+                                if (pix == 8) {
+                                        rc = plpar_hcall9(H_BULK_REMOVE, param,
                                                 param[0], param[1], param[2],
                                                 param[3], param[4], param[5],
                                                 param[6], param[7]);
-                                BUG_ON(rc != H_SUCCESS);
-                                pix = 0;
+                                        BUG_ON(rc != H_SUCCESS);
+                                        pix = 0;
+                                }
                         }
                 } pte_iterate_hashed_end();
         }
diff --git a/include/asm-powerpc/firmware.h b/include/asm-powerpc/firmware.h
index abba808cc53c..3671c128f271 100644
--- a/include/asm-powerpc/firmware.h
+++ b/include/asm-powerpc/firmware.h
@@ -44,6 +44,7 @@
 #define FW_FEATURE_LPAR         ASM_CONST(0x0000000000400000)
 #define FW_FEATURE_PS3_LV1      ASM_CONST(0x0000000000800000)
 #define FW_FEATURE_BEAT         ASM_CONST(0x0000000001000000)
+#define FW_FEATURE_BULK_REMOVE  ASM_CONST(0x0000000002000000)
 
 #ifndef __ASSEMBLY__