On Tue, 2016-11-22 at 23:36 +0530, Gautham R. Shenoy wrote: > 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>
Tested here on my configuration... FWIW Acked-By: Michael Neuling <mi...@neuling.org> > --- > 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
