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powernv: Clear SPRN_PSSCR when a POWER9 CPU comes online

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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>
This commit is contained in:
Gautham R. Shenoy 2016-11-22 23:36:40 +05:30 committed by Michael Ellerman
parent 56144ec7c9
commit 378f96d3cd
1 changed files with 2 additions and 0 deletions
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2
arch/powerpc/kernel/cpu_setup_power.S
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@ -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