diff mbox series

[4/4] powerpc/smp: Disable MC domain for shared processor

Message ID 20230830105244.62477-5-srikar@linux.vnet.ibm.com (mailing list archive)
State Superseded
Headers show
Series powerpc/smp: Shared processor sched optimizations | expand

Checks

Context Check Description
snowpatch_ozlabs/github-powerpc_ppctests success Successfully ran 8 jobs.
snowpatch_ozlabs/github-powerpc_selftests success Successfully ran 8 jobs.
snowpatch_ozlabs/github-powerpc_clang success Successfully ran 6 jobs.
snowpatch_ozlabs/github-powerpc_sparse success Successfully ran 4 jobs.
snowpatch_ozlabs/github-powerpc_kernel_qemu success Successfully ran 23 jobs.

Commit Message

Srikar Dronamraju Aug. 30, 2023, 10:52 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 51403640440c..48b8161179a8 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -1036,6 +1036,10 @@  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;
 }