Message ID | 20180327043724.13862-8-mikey@neuling.org |
---|---|
State | Not Applicable |
Headers | show |
Series | powerpc: Disable DAWR on POWER9 | expand |
diff --git a/arch/powerpc/kernel/dt_cpu_ftrs.c b/arch/powerpc/kernel/dt_cpu_ftrs.c index 945e2c29ad..941a5fbd8d 100644 --- a/arch/powerpc/kernel/dt_cpu_ftrs.c +++ b/arch/powerpc/kernel/dt_cpu_ftrs.c @@ -709,6 +709,9 @@ static __init void cpufeatures_cpu_quirks(void) cur_cpu_spec->cpu_features |= CPU_FTR_POWER9_DD1; else if ((version & 0xffffefff) == 0x004e0201) cur_cpu_spec->cpu_features |= CPU_FTR_POWER9_DD2_1; + + if ((version & 0xffff0000) == 0x004e0000) + cur_cpu_spec->cpu_features &= ~(CPU_FTR_DAWR); } static void __init cpufeatures_setup_finished(void)
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: Michael Neuling <mikey@neuling.org> --- arch/powerpc/kernel/dt_cpu_ftrs.c | 3 +++ 1 file changed, 3 insertions(+)