[PATCH v2 2/4] powerpc/perf/hv-24x7: Avoid loading hv-24x7 during dump kernel

[Madhavan Srinivasan <maddy@linux.ibm.com>]

hv-24x7 pmu driver are intended to get system-wide resourse
metrics and these are built-in. hv-24x7 pmu does not have
commandline option to disable them. Add check for kdump and
fadump kernel to avoids loading them.

Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
---
Changelog v1:
- Added more details to commmit message

 arch/powerpc/perf/hv-24x7.c   | 3 +++
 arch/powerpc/perf/hv-common.h | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/arch/powerpc/perf/hv-24x7.c b/arch/powerpc/perf/hv-24x7.c
index d400fa391c27..3a626cd8cf54 100644
--- a/arch/powerpc/perf/hv-24x7.c
+++ b/arch/powerpc/perf/hv-24x7.c
@@ -1698,6 +1698,9 @@ static int hv_24x7_init(void)
 	unsigned int pvr = mfspr(SPRN_PVR);
 	struct hv_perf_caps caps;
 
+	if (is_kdump_kernel() || is_fadump_active())
+		return 0;
+
 	if (!firmware_has_feature(FW_FEATURE_LPAR)) {
 		pr_debug("not a virtualized system, not enabling\n");
 		return -ENODEV;
diff --git a/arch/powerpc/perf/hv-common.h b/arch/powerpc/perf/hv-common.h
index 2cce17bc321c..a4c062d2264e 100644
--- a/arch/powerpc/perf/hv-common.h
+++ b/arch/powerpc/perf/hv-common.h
@@ -4,6 +4,8 @@
 
 #include <linux/perf_event.h>
 #include <linux/types.h>
+#include <asm/fadump.h>
+#include <asm/kexec.h>
 
 struct hv_perf_caps {
 	u16 version;
-- 
2.47.0