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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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5
arch/powerpc/platforms/pseries/lpar.c
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@@ -1549,11 +1549,6 @@ void radix_init_pseries(void)
pseries_lpar_register_process_table(__pa(process_tb),
0, PRTB_SIZE_SHIFT - 12);
asm volatile("ptesync" : : : "memory");
asm volatile(PPC_TLBIE_5(%0,%1,2,1,1) : :
"r" (TLBIEL_INVAL_SET_LPID), "r" (0));
asm volatile("eieio; tlbsync; ptesync" : : : "memory");
trace_tlbie(0, 0, TLBIEL_INVAL_SET_LPID, 0, 2, 1, 1);
}
#ifdef CONFIG_PPC_SMLPAR