diff mbox series

[v5,2/5] powerpc/smp: Disable MC domain for shared processor

Message ID 20231214180720.310852-3-srikar@linux.vnet.ibm.com (mailing list archive)
State Accepted
Commit 0e1c1986e0e65746daa05405d7747ce882f83cf1
Headers show
Series powerpc/smp: Topology and shared processor optimizations | expand

Commit Message

Srikar Dronamraju Dec. 14, 2023, 6:07 p.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 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;
 }