diff options
Diffstat (limited to 'arch/powerpc/perf/hv-common.c')
-rw-r--r-- | arch/powerpc/perf/hv-common.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/powerpc/perf/hv-common.c b/arch/powerpc/perf/hv-common.c new file mode 100644 index 0000000000..0370518edd --- /dev/null +++ b/arch/powerpc/perf/hv-common.c @@ -0,0 +1,40 @@ +// SPDX-License-Identifier: GPL-2.0 +#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; +} |