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

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From	"Gautham R. Shenoy" <ego@linux.vnet.ibm.com>
Newsgroups	linux.kernel
Subject	[PATCH] powernv: Clear SPRN_PSSCR when a POWER9 CPU comes online
Date	Tue, 22 Nov 2016 19:10:02 +0100
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From: "Gautham R. Shenoy" <ego@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 <ego@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

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[PATCH] powernv: Clear SPRN_PSSCR when a POWER9 CPU comes online "Gautham R. Shenoy" <ego@linux.vnet.ibm.com> - 2016-11-22 19:10 +0100
  Re: [PATCH] powernv: Clear SPRN_PSSCR when a POWER9 CPU comes online Michael Ellerman <mpe@ellerman.id.au> - 2016-11-23 00:40 +0100
    Re: [PATCH] powernv: Clear SPRN_PSSCR when a POWER9 CPU comes online Michael Neuling <mikey@neuling.org> - 2016-11-23 00:40 +0100
  Re: [PATCH] powernv: Clear SPRN_PSSCR when a POWER9 CPU comes online Michael Neuling <mikey@neuling.org> - 2016-11-23 01:40 +0100

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