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Commit 622aa35e authored by Michael Neuling's avatar Michael Neuling Committed by Michael Ellerman
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powerpc: Disable DAWR on POWER9 via CPU feature quirk 



This disables the DAWR on all POWER9 CPUs via cpu feature quirk.

Using the DAWR on POWER9 can cause xstops, hence we need to disable
it.

Signed-off-by: default avatarMichael Neuling <mikey@neuling.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent b53221e7

arch/powerpc/kernel/dt_cpu_ftrs.c

+3 −0
Original line number Diff line number Diff line
@@ -713,6 +713,9 @@ static __init void cpufeatures_cpu_quirks(void) 
	else if ((version & 0xffffefff) == 0x004e0202)

		cur_cpu_spec->cpu_features |= CPU_FTR_P9_TM_HV_ASSIST |

			CPU_FTR_P9_TM_XER_SO_BUG;



	if ((version & 0xffff0000) == 0x004e0000)

		cur_cpu_spec->cpu_features &= ~(CPU_FTR_DAWR);

}



static void __init cpufeatures_setup_finished(void)