Re: [PATCH] powernv: Clear SPRN_PSSCR when a POWER9 CPU comes online
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From: Michael Neuling <hidden>
Date: 2016-11-23 00:32:58
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On Tue, 2016-11-22 at 23:36 +0530, Gautham R. Shenoy wrote:
From: "Gautham R. Shenoy" <redacted> =20 Ensure that PSSCR is set to a safe value corresponding to no state-loss each time a POWER9 CPU comes online. =20 Signed-off-by: Gautham R. Shenoy <redacted>
Tested here on my configuration... FWIW Acked-By: Michael Neuling <redacted>
quoted hunk ↗ jump to hunk
--- =C2=A0arch/powerpc/kernel/cpu_setup_power.S | 2 ++ =C2=A01 file changed, 2 insertions(+) =20diff --git a/arch/powerpc/kernel/cpu_setup_power.Sb/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)=C2=A0 mtlr r11 =C2=A0 beqlr =C2=A0 li r0,0 + mtspr SPRN_PSSCR,r0 =C2=A0 mtspr SPRN_LPID,r0 =C2=A0 mfspr r3,SPRN_LPCR =C2=A0 ori r3, r3, LPCR_PECEDH@@ -116,6 +117,7 @@ _GLOBAL(__restore_cpu_power9)=C2=A0 mtlr r11 =C2=A0 beqlr =C2=A0 li r0,0 + mtspr SPRN_PSSCR,r0 =C2=A0 mtspr SPRN_LPID,r0 =C2=A0 mfspr=C2=A0=C2=A0=C2=A0r3,SPRN_LPCR =C2=A0 ori r3, r3, LPCR_PECEDH