vpa-pmu driver is used to collect latency metrics for host to guest
or guest to host context switches in a PowerVM KVM guest scenario.
This may not be used during the dump kernel, avoid loading it
Signed-off-by: Madhavan Srinivasan <ma...@linux.ibm.com>
---
arch/powerpc/perf/vpa-pmu.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/powerpc/perf/vpa-pmu.c b/arch/powerpc/perf/vpa-pmu.c
index 6a5bfd2a13b5..f7f72b976c1d 100644
--- a/arch/powerpc/perf/vpa-pmu.c
+++ b/arch/powerpc/perf/vpa-pmu.c
@@ -10,6 +10,8 @@
#include <linux/perf_event.h>
#include <asm/kvm_ppc.h>
#include <asm/kvm_book3s_64.h>
+#include <asm/fadump.h>
+#include <asm/kexec.h>
#define MODULE_VERS "1.0"
#define MODULE_NAME "pseries_vpa_pmu"
@@ -183,6 +185,9 @@ static int __init pseries_vpa_pmu_init(void)
if (!firmware_has_feature(FW_FEATURE_LPAR) || is_kvm_guest())
return -ENODEV;
+ if (is_kdump_kernel() || is_fadump_active())
+ return 0;
+
perf_pmu_register(&vpa_pmu, vpa_pmu.name, -1);
pr_info("Virtual Processor Area PMU registered.\n");
--
2.47.0
