[PATCH] powernv: Clear SPRN_PSSCR when a POWER9 CPU comes online

[Gautham R. Shenoy]

From: "Gautham R. Shenoy" <e...@linux.vnet.ibm.com>

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 <e...@linux.vnet.ibm.com>
---
 arch/powerpc/kernel/cpu_setup_power.S | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/kernel/cpu_setup_power.S 
b/arch/powerpc/kernel/cpu_setup_power.S
index 52ff3f0..37ad045 100644
--- a/arch/powerpc/kernel/cpu_setup_power.S
+++ b/arch/powerpc/kernel/cpu_setup_power.S
@@ -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
-- 
1.9.4