Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / powerpc / perf / hv-common.c

diff --git a/kernel/arch/powerpc/perf/hv-common.c b/kernel/arch/powerpc/perf/hv-common.c
new file mode 100644 (file)
index 0000000..7dce8f1
--- /dev/null
+++ b/kernel/arch/powerpc/perf/hv-common.c
@@ -0,0 +1,39 @@
+#include <asm/io.h>
+#include <asm/hvcall.h>
+
+#include "hv-gpci.h"
+#include "hv-common.h"
+
+unsigned long hv_perf_caps_get(struct hv_perf_caps *caps)
+{
+       unsigned long r;
+       struct p {
+               struct hv_get_perf_counter_info_params params;
+               struct hv_gpci_system_performance_capabilities caps;
+       } __packed __aligned(sizeof(uint64_t));
+
+       struct p arg = {
+               .params = {
+                       .counter_request = cpu_to_be32(
+                               HV_GPCI_system_performance_capabilities),
+                       .starting_index = cpu_to_be32(-1),
+                       .counter_info_version_in = 0,
+               }
+       };
+
+       r = plpar_hcall_norets(H_GET_PERF_COUNTER_INFO,
+                              virt_to_phys(&arg), sizeof(arg));
+
+       if (r)
+               return r;
+
+       pr_devel("capability_mask: 0x%x\n", arg.caps.capability_mask);
+
+       caps->version = arg.params.counter_info_version_out;
+       caps->collect_privileged = !!arg.caps.perf_collect_privileged;
+       caps->ga = !!(arg.caps.capability_mask & HV_GPCI_CM_GA);
+       caps->expanded = !!(arg.caps.capability_mask & HV_GPCI_CM_EXPANDED);
+       caps->lab = !!(arg.caps.capability_mask & HV_GPCI_CM_LAB);
+
+       return r;
+}