powerpc/44x: don't use tlbivax on AMP systems
Since other OS's may be running on the other cores don't use tlbivax
Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h
index 4138b21..bb5591f 100644
--- a/arch/powerpc/include/asm/mmu.h
+++ b/arch/powerpc/include/asm/mmu.h
@@ -120,9 +120,14 @@
return (cur_cpu_spec->mmu_features & feature);
}
+static inline void mmu_clear_feature(unsigned long feature)
+{
+ cur_cpu_spec->mmu_features &= ~feature;
+}
+
extern unsigned int __start___mmu_ftr_fixup, __stop___mmu_ftr_fixup;
-/* MMU initialization (64-bit only fo now) */
+/* MMU initialization */
extern void early_init_mmu(void);
extern void early_init_mmu_secondary(void);
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index 1d2fbc9..7544e39 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -126,6 +126,8 @@
/* Do some early initialization based on the flat device tree */
early_init_devtree(__va(dt_ptr));
+ early_init_mmu();
+
probe_machine();
setup_kdump_trampoline();
diff --git a/arch/powerpc/mm/tlb_hash32.c b/arch/powerpc/mm/tlb_hash32.c
index 27b863c..9a445f6 100644
--- a/arch/powerpc/mm/tlb_hash32.c
+++ b/arch/powerpc/mm/tlb_hash32.c
@@ -177,3 +177,7 @@
flush_range(vma->vm_mm, start, end);
}
EXPORT_SYMBOL(flush_tlb_range);
+
+void __init early_init_mmu(void)
+{
+}
diff --git a/arch/powerpc/mm/tlb_nohash.c b/arch/powerpc/mm/tlb_nohash.c
index 3722185..7355211 100644
--- a/arch/powerpc/mm/tlb_nohash.c
+++ b/arch/powerpc/mm/tlb_nohash.c
@@ -35,6 +35,7 @@
#include <linux/preempt.h>
#include <linux/spinlock.h>
#include <linux/memblock.h>
+#include <linux/of_fdt.h>
#include <asm/tlbflush.h>
#include <asm/tlb.h>
@@ -266,6 +267,17 @@
#endif /* CONFIG_SMP */
+#ifdef CONFIG_PPC_47x
+void __init early_init_mmu_47x(void)
+{
+#ifdef CONFIG_SMP
+ unsigned long root = of_get_flat_dt_root();
+ if (of_get_flat_dt_prop(root, "cooperative-partition", NULL))
+ mmu_clear_feature(MMU_FTR_USE_TLBIVAX_BCAST);
+#endif /* CONFIG_SMP */
+}
+#endif /* CONFIG_PPC_47x */
+
/*
* Flush kernel TLB entries in the given range
*/
@@ -593,4 +605,11 @@
/* Finally limit subsequent allocations */
memblock_set_current_limit(first_memblock_base + ppc64_rma_size);
}
+#else /* ! CONFIG_PPC64 */
+void __init early_init_mmu(void)
+{
+#ifdef CONFIG_PPC_47x
+ early_init_mmu_47x();
+#endif
+}
#endif /* CONFIG_PPC64 */