From 0e1c1986e0e65746daa05405d7747ce882f83cf1 Mon Sep 17 00:00:00 2001 From: Srikar Dronamraju Date: Thu, 14 Dec 2023 23:37:12 +0530 Subject: powerpc/smp: Disable MC domain for shared processor Like L2-cache info, coregroup information which is used to determine MC sched domains is only present on dedicated LPARs. i.e PowerVM doesn't export coregroup information for shared processor LPARs. Hence disable creating MC domains on shared LPAR Systems. Signed-off-by: Srikar Dronamraju Signed-off-by: Michael Ellerman Link: https://msgid.link/20231214180720.310852-3-srikar@linux.vnet.ibm.com --- arch/powerpc/kernel/smp.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/powerpc') diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index 3fc8ad9646a4..2cebc53e97f9 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -1055,6 +1055,10 @@ static struct cpumask *cpu_coregroup_mask(int cpu) static bool has_coregroup_support(void) { + /* Coregroup identification not available on shared systems */ + if (is_shared_processor()) + return 0; + return coregroup_enabled; } -- cgit v1.2.3