powerpc/mm/radix: Use STD_MMU_64 to properly isolate hash related code
We also use MMU_FTR_RADIX to branch out from code path specific to
hash.
No functionality change.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index ad79816..ea8a28f 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1079,7 +1079,7 @@
}
#endif /* CONFIG_PPC64 */
-#ifdef CONFIG_PPC_BOOK3S_64
+#ifdef CONFIG_PPC_STD_MMU_64
batch = this_cpu_ptr(&ppc64_tlb_batch);
if (batch->active) {
current_thread_info()->local_flags |= _TLF_LAZY_MMU;
@@ -1087,7 +1087,7 @@
__flush_tlb_pending(batch);
batch->active = 0;
}
-#endif /* CONFIG_PPC_BOOK3S_64 */
+#endif /* CONFIG_PPC_STD_MMU_64 */
#ifdef CONFIG_PPC_ADV_DEBUG_REGS
switch_booke_debug_regs(&new->thread.debug);
@@ -1133,7 +1133,7 @@
last = _switch(old_thread, new_thread);
-#ifdef CONFIG_PPC_BOOK3S_64
+#ifdef CONFIG_PPC_STD_MMU_64
if (current_thread_info()->local_flags & _TLF_LAZY_MMU) {
current_thread_info()->local_flags &= ~_TLF_LAZY_MMU;
batch = this_cpu_ptr(&ppc64_tlb_batch);
@@ -1142,8 +1142,7 @@
if (current_thread_info()->task->thread.regs)
restore_math(current_thread_info()->task->thread.regs);
-
-#endif /* CONFIG_PPC_BOOK3S_64 */
+#endif /* CONFIG_PPC_STD_MMU_64 */
return last;
}
@@ -1378,6 +1377,9 @@
unsigned long sp_vsid;
unsigned long llp = mmu_psize_defs[mmu_linear_psize].sllp;
+ if (radix_enabled())
+ return;
+
if (mmu_has_feature(MMU_FTR_1T_SEGMENT))
sp_vsid = get_kernel_vsid(sp, MMU_SEGSIZE_1T)
<< SLB_VSID_SHIFT_1T;
@@ -1926,7 +1928,8 @@
* the heap, we can put it above 1TB so it is backed by a 1TB
* segment. Otherwise the heap will be in the bottom 1TB
* which always uses 256MB segments and this may result in a
- * performance penalty.
+ * performance penalty. We don't need to worry about radix. For
+ * radix, mmu_highuser_ssize remains unchanged from 256MB.
*/
if (!is_32bit_task() && (mmu_highuser_ssize == MMU_SEGSIZE_1T))
base = max_t(unsigned long, mm->brk, 1UL << SID_SHIFT_1T);