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[v3,2/5] powerpc/smp: Disable MC domain for shared processor

Message ID 20231026101843.56784-3-srikar@linux.vnet.ibm.com (mailing list archive)
State Superseded
Headers show
Series powerpc/smp: Topology and shared processor optimizations | expand

Commit Message

Srikar Dronamraju Oct. 26, 2023, 10:18 a.m. UTC 
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 <srikar@linux.vnet.ibm.com>
---
 arch/powerpc/kernel/smp.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index dbf0a584804b..9fda012d9eca 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -1052,6 +1052,10 @@  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;
 }