Commit 310dce62 authored by Nicholas Piggin's avatar Nicholas Piggin Committed by Michael Ellerman
Browse files

powerpc/64s: Make flush_and_reload_slb a no-op when radix is enabled 



The radix test can exclude slb_flush_all_realmode() from being called
because flush_and_reload_slb() is only expected to flush ERAT when
called by flush_erat(), which is only on pre-ISA v3.0 CPUs that do not
support radix.

This helps the later change to make hash support configurable to not
introduce runtime changes to radix mode behaviour.

Signed-off-by: default avatarNicholas Piggin <npiggin@gmail.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211201144153.2456614-9-npiggin@gmail.com
parent 162b0889

arch/powerpc/kernel/mce_power.c

+3 −3
Original line number Diff line number Diff line
@@ -80,12 +80,12 @@ static bool mce_in_guest(void) 
#ifdef CONFIG_PPC_BOOK3S_64

void flush_and_reload_slb(void)

{

	/* Invalidate all SLBs */

	slb_flush_all_realmode();



	if (early_radix_enabled())

		return;



	/* Invalidate all SLBs */

	slb_flush_all_realmode();



	/*

	 * This probably shouldn't happen, but it may be possible it's

	 * called in early boot before SLB shadows are allocated.