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authorMichael Ellerman <mpe@ellerman.id.au>2016-07-26 21:29:30 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2016-08-01 11:14:53 +1000
commitc610ec60ed6354157ea7b0c9c9a7236126ef416b (patch)
tree69b5697e844b7dfd35bdb240a64d9d5b3bf2a29f /arch/powerpc/mm/init_64.c
parent1a01dc87e09b6e60d22c417e00f470a72f00ec80 (diff)
powerpc/mm: Move disable_radix handling into mmu_early_init_devtree()
Move the handling of the disable_radix command line argument into the newly created mmu_early_init_devtree(). It's an MMU option so it's preferable to have it in an mm related file, and it also means platforms that don't support radix don't have to carry the code. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/mm/init_64.c')
-rw-r--r--arch/powerpc/mm/init_64.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c
index d0fb33ac3db2..0d51e6e25db5 100644
--- a/arch/powerpc/mm/init_64.c
+++ b/arch/powerpc/mm/init_64.c
@@ -413,7 +413,18 @@ EXPORT_SYMBOL_GPL(realmode_pfn_to_page);
#endif /* CONFIG_SPARSEMEM_VMEMMAP/CONFIG_FLATMEM */
#ifdef CONFIG_PPC_STD_MMU_64
+static bool disable_radix;
+static int __init parse_disable_radix(char *p)
+{
+ disable_radix = true;
+ return 0;
+}
+early_param("disable_radix", parse_disable_radix);
+
void __init mmu_early_init_devtree(void)
{
+ /* Disable radix mode based on kernel command line. */
+ if (disable_radix)
+ cur_cpu_spec->mmu_features &= ~MMU_FTR_RADIX;
}
#endif /* CONFIG_PPC_STD_MMU_64 */