Commit 378f96d3 authored Nov 22, 2016 by Gautham R. Shenoy Committed by Michael Ellerman Nov 25, 2016

powernv: Clear SPRN_PSSCR when a POWER9 CPU comes online



Ensure that PSSCR is set to a safe value corresponding to no
state-loss each time a POWER9 CPU comes online.

Signed-off-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Acked-By: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

parent 56144ec7

arch/powerpc/kernel/cpu_setup_power.S

+2 −0

Original line number	Diff line number	Diff line
		@@ -96,6 +96,7 @@ _GLOBAL(__setup_cpu_power9)
		mtlr r11
		beqlr
		li r0,0
		mtspr SPRN_PSSCR,r0
		mtspr SPRN_LPID,r0
		mfspr r3,SPRN_LPCR
		ori r3, r3, LPCR_PECEDH
		@@ -116,6 +117,7 @@ _GLOBAL(__restore_cpu_power9)
		mtlr r11
		beqlr
		li r0,0
		mtspr SPRN_PSSCR,r0
		mtspr SPRN_LPID,r0
		mfspr r3,SPRN_LPCR
		ori r3, r3, LPCR_PECEDH