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powerpc/64s: remove unnecessary translation cache flushes at boot

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The various translation structure invalidations performed in early boot
when the MMU is off are not required, because everything is invalidated
immediately before a CPU first enables its MMU (see early_init_mmu
and early_init_mmu_secondary).

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190902152931.17840-6-npiggin@gmail.com
This commit is contained in:
Nicholas Piggin
2019-09-03 01:29:30 +10:00
committed by Michael Ellerman
parent 7e71c428a6
commit 7d805accbe
4 changed files with 7 additions and 13 deletions
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2
arch/powerpc/mm/book3s64/hash_utils.c
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@@ -825,7 +825,7 @@ static void __init hash_init_partition_table(phys_addr_t hash_table,
* For now, UPRT is 0 and we have no segment table.
*/
htab_size = __ilog2(htab_size) - 18;
mmu_partition_table_set_entry(0, hash_table | htab_size, 0, true);
mmu_partition_table_set_entry(0, hash_table | htab_size, 0, false);
pr_info("Partition table %p\n", partition_tb);
}