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Commit e3ee15dc authored by Sukadev Bhattiprolu's avatar Sukadev Bhattiprolu Committed by Michael Ellerman
Browse files

powerpc/perf/hv-24x7: Define add_event_to_24x7_request() 



Move code that maps a perf_event to a 24x7 request buffer into a
separate function, add_event_to_24x7_request().

Signed-off-by: default avatarSukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 33ba14c0

arch/powerpc/perf/hv-24x7.c

+42 −17
Original line number Diff line number Diff line
@@ -1000,15 +1000,52 @@ static void log_24x7_hcall(struct hv_24x7_request_buffer *request_buffer, 
			result_buffer->failing_request_ix);

}



static unsigned long single_24x7_request(struct perf_event *event, u64 *count)

/*

 * Add the given @event to the next slot in the 24x7 request_buffer.

 *

 * Note that H_GET_24X7_DATA hcall allows reading several counters'

 * values in a single HCALL. We expect the caller to add events to the

 * request buffer one by one, make the HCALL and process the results.

 */

static int add_event_to_24x7_request(struct perf_event *event,

				struct hv_24x7_request_buffer *request_buffer)

{

	u16 idx;

	int i;

	struct hv_24x7_request *req;



	if (request_buffer->num_requests > 254) {

		pr_devel("Too many requests for 24x7 HCALL %d\n",

				request_buffer->num_requests);

		return -EINVAL;

	}



	if (is_physical_domain(event_get_domain(event)))

		idx = event_get_core(event);

	else

		idx = event_get_vcpu(event);



	i = request_buffer->num_requests++;

	req = &request_buffer->requests[i];



	req->performance_domain = event_get_domain(event);

	req->data_size = cpu_to_be16(8);

	req->data_offset = cpu_to_be32(event_get_offset(event));

	req->starting_lpar_ix = cpu_to_be16(event_get_lpar(event)),

	req->max_num_lpars = cpu_to_be16(1);

	req->starting_ix = cpu_to_be16(idx);

	req->max_ix = cpu_to_be16(1);



	return 0;

}



static unsigned long single_24x7_request(struct perf_event *event, u64 *count)

{

	unsigned long ret;



	struct hv_24x7_request_buffer *request_buffer;

	struct hv_24x7_data_result_buffer *result_buffer;

	struct hv_24x7_result *resb;

	struct hv_24x7_request *req;



	BUILD_BUG_ON(sizeof(*request_buffer) > 4096);

	BUILD_BUG_ON(sizeof(*result_buffer) > 4096);
@@ -1019,23 +1056,11 @@ static unsigned long single_24x7_request(struct perf_event *event, u64 *count) 
	memset(request_buffer, 0, 4096);

	memset(result_buffer, 0, 4096);



	if (is_physical_domain(event_get_domain(event)))

		idx = event_get_core(event);

	else

		idx = event_get_vcpu(event);



	request_buffer->interface_version = HV_24X7_IF_VERSION_CURRENT;

	request_buffer->num_requests = 1;



	req = &request_buffer->requests[0];



	req->performance_domain = event_get_domain(event);

	req->data_size = cpu_to_be16(8);

	req->data_offset = cpu_to_be32(event_get_offset(event));

	req->starting_lpar_ix = cpu_to_be16(event_get_lpar(event)),

	req->max_num_lpars = cpu_to_be16(1);

	req->starting_ix = cpu_to_be16(idx);

	req->max_ix = cpu_to_be16(1);

	ret = add_event_to_24x7_request(event, request_buffer);

	if (ret)

		return ret;



	/*

	 * NOTE: Due to variable number of array elements in request and