/*
 * Copyright (C) 2016 Red Hat, Inc.
 * Author: Michael S. Tsirkin <mst@redhat.com>
 * This work is licensed under the terms of the GNU GPL, version 2.
 *
 * Command line processing and common functions for ring benchmarking.
 */
#define _GNU_SOURCE
#include <getopt.h>
#include <pthread.h>
#include <assert.h>
#include <sched.h>
#include "main.h"
#include <sys/eventfd.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <limits.h>

int runcycles = 10000000;
int max_outstanding = INT_MAX;
int batch = 1;

bool do_sleep = false;
bool do_relax = false;
bool do_exit = true;

unsigned ring_size = 256;

static int kickfd = -1;
static int callfd = -1;

void notify(int fd)
{
	unsigned long long v = 1;
	int r;

	vmexit();
	r = write(fd, &v, sizeof v);
	assert(r == sizeof v);
	vmentry();
}

void wait_for_notify(int fd)
{
	unsigned long long v = 1;
	int r;

	vmexit();
	r = read(fd, &v, sizeof v);
	assert(r == sizeof v);
	vmentry();
}

void kick(void)
{
	notify(kickfd);
}

void wait_for_kick(void)
{
	wait_for_notify(kickfd);
}

void call(void)
{
	notify(callfd);
}

void wait_for_call(void)
{
	wait_for_notify(callfd);
}

void set_affinity(const char *arg)
{
	cpu_set_t cpuset;
	int ret;
	pthread_t self;
	long int cpu;
	char *endptr;

	if (!arg)
		return;

	cpu = strtol(arg, &endptr, 0);
	assert(!*endptr);

	assert(cpu >= 0 || cpu < CPU_SETSIZE);

	self = pthread_self();
	CPU_ZERO(&cpuset);
	CPU_SET(cpu, &cpuset);

	ret = pthread_setaffinity_np(self, sizeof(cpu_set_t), &cpuset);
	assert(!ret);
}

void poll_used(void)
{
	while (used_empty())
		busy_wait();
}

static void __attribute__((__flatten__)) run_guest(void)
{
	int completed_before;
	int completed = 0;
	int started = 0;
	int bufs = runcycles;
	int spurious = 0;
	int r;
	unsigned len;
	void *buf;
	int tokick = batch;

	for (;;) {
		if (do_sleep)
			disable_call();
		completed_before = completed;
		do {
			if (started < bufs &&
			    started - completed < max_outstanding) {
				r = add_inbuf(0, "Buffer\n", "Hello, world!");
				if (__builtin_expect(r == 0, true)) {
					++started;
					if (!--tokick) {
						tokick = batch;
						if (do_sleep)
							kick_available();
					}

				}
			} else
				r = -1;

			/* Flush out completed bufs if any */
			if (get_buf(&len, &buf)) {
				++completed;
				if (__builtin_expect(completed == bufs, false))
					return;
				r = 0;
			}
		} while (r == 0);
		if (completed == completed_before)
			++spurious;
		assert(completed <= bufs);
		assert(started <= bufs);
		if (do_sleep) {
			if (used_empty() && enable_call())
				wait_for_call();
		} else {
			poll_used();
		}
	}
}

void poll_avail(void)
{
	while (avail_empty())
		busy_wait();
}

static void __attribute__((__flatten__)) run_host(void)
{
	int completed_before;
	int completed = 0;
	int spurious = 0;
	int bufs = runcycles;
	unsigned len;
	void *buf;

	for (;;) {
		if (do_sleep) {
			if (avail_empty() && enable_kick())
				wait_for_kick();
		} else {
			poll_avail();
		}
		if (do_sleep)
			disable_kick();
		completed_before = completed;
		while (__builtin_expect(use_buf(&len, &buf), true)) {
			if (do_sleep)
				call_used();
			++completed;
			if (__builtin_expect(completed == bufs, false))
				return;
		}
		if (completed == completed_before)
			++spurious;
		assert(completed <= bufs);
		if (completed == bufs)
			break;
	}
}

void *start_guest(void *arg)
{
	set_affinity(arg);
	run_guest();
	pthread_exit(NULL);
}

void *start_host(void *arg)
{
	set_affinity(arg);
	run_host();
	pthread_exit(NULL);
}

static const char optstring[] = "";
static const struct option longopts[] = {
	{
		.name = "help",
		.has_arg = no_argument,
		.val = 'h',
	},
	{
		.name = "host-affinity",
		.has_arg = required_argument,
		.val = 'H',
	},
	{
		.name = "guest-affinity",
		.has_arg = required_argument,
		.val = 'G',
	},
	{
		.name = "ring-size",
		.has_arg = required_argument,
		.val = 'R',
	},
	{
		.name = "run-cycles",
		.has_arg = required_argument,
		.val = 'C',
	},
	{
		.name = "outstanding",
		.has_arg = required_argument,
		.val = 'o',
	},
	{
		.name = "batch",
		.has_arg = required_argument,
		.val = 'b',
	},
	{
		.name = "sleep",
		.has_arg = no_argument,
		.val = 's',
	},
	{
		.name = "relax",
		.has_arg = no_argument,
		.val = 'x',
	},
	{
		.name = "exit",
		.has_arg = no_argument,
		.val = 'e',
	},
	{
	}
};

static void help(void)
{
	fprintf(stderr, "Usage: <test> [--help]"
		" [--host-affinity H]"
		" [--guest-affinity G]"
		" [--ring-size R (default: %d)]"
		" [--run-cycles C (default: %d)]"
		" [--batch b]"
		" [--outstanding o]"
		" [--sleep]"
		" [--relax]"
		" [--exit]"
		"\n",
		ring_size,
		runcycles);
}

int main(int argc, char **argv)
{
	int ret;
	pthread_t host, guest;
	void *tret;
	char *host_arg = NULL;
	char *guest_arg = NULL;
	char *endptr;
	long int c;

	kickfd = eventfd(0, 0);
	assert(kickfd >= 0);
	callfd = eventfd(0, 0);
	assert(callfd >= 0);

	for (;;) {
		int o = getopt_long(argc, argv, optstring, longopts, NULL);
		switch (o) {
		case -1:
			goto done;
		case '?':
			help();
			exit(2);
		case 'H':
			host_arg = optarg;
			break;
		case 'G':
			guest_arg = optarg;
			break;
		case 'R':
			ring_size = strtol(optarg, &endptr, 0);
			assert(ring_size && !(ring_size & (ring_size - 1)));
			assert(!*endptr);
			break;
		case 'C':
			c = strtol(optarg, &endptr, 0);
			assert(!*endptr);
			assert(c > 0 && c < INT_MAX);
			runcycles = c;
			break;
		case 'o':
			c = strtol(optarg, &endptr, 0);
			assert(!*endptr);
			assert(c > 0 && c < INT_MAX);
			max_outstanding = c;
			break;
		case 'b':
			c = strtol(optarg, &endptr, 0);
			assert(!*endptr);
			assert(c > 0 && c < INT_MAX);
			batch = c;
			break;
		case 's':
			do_sleep = true;
			break;
		case 'x':
			do_relax = true;
			break;
		case 'e':
			do_exit = true;
			break;
		default:
			help();
			exit(4);
			break;
		}
	}

	/* does nothing here, used to make sure all smp APIs compile */
	smp_acquire();
	smp_release();
	smp_mb();
done:

	if (batch > max_outstanding)
		batch = max_outstanding;

	if (optind < argc) {
		help();
		exit(4);
	}
	alloc_ring();

	ret = pthread_create(&host, NULL, start_host, host_arg);
	assert(!ret);
	ret = pthread_create(&guest, NULL, start_guest, guest_arg);
	assert(!ret);

	ret = pthread_join(guest, &tret);
	assert(!ret);
	ret = pthread_join(host, &tret);
	assert(!ret);
	return 0;
}
floating-point.json?id=11e3b725cfc282efe9d4a354153e99d86a16af08'>tools/perf/pmu-events/arch/x86/nehalemep/floating-point.json</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/pmu-events/arch/x86/nehalemep/floating-point.json?id=d6040764adcb5cb6de1489422411d701c158bb69'>d6040764adcb5cb6de1489422411d701c158bb69</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/perf/pmu-events/arch/x86/nehalemep/floating-point.json?id=11e3b725cfc282efe9d4a354153e99d86a16af08&amp;id2=d6040764adcb5cb6de1489422411d701c158bb69'>diff</a>)</td></tr></table>
<div class='commit-subject'>crypto: arm64/aes-blk - honour iv_out requirement in CBC and CTR modes</div><div class='commit-msg'>Update the ARMv8 Crypto Extensions and the plain NEON AES implementations
in CBC and CTR modes to return the next IV back to the skcipher API client.
This is necessary for chaining to work correctly.

Note that for CTR, this is only done if the request is a round multiple of
the block size, since otherwise, chaining is impossible anyway.

Cc: &lt;stable@vger.kernel.org&gt; # v3.16+
Signed-off-by: Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;
Signed-off-by: Herbert Xu &lt;herbert@gondor.apana.org.au&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=11e3b725cfc282efe9d4a354153e99d86a16af08'>Diffstat</a> (limited to 'tools/perf/pmu-events/arch/x86/nehalemep/floating-point.json')</div><table summary='diffstat' class='diffstat'>