linux/arch/x86/mm/testmmiotrace.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Written by Pekka Paalanen, 2008-2009 <[email protected]>
 */

#define pr_fmt(fmt) …

#include <linux/module.h>
#include <linux/io.h>
#include <linux/mmiotrace.h>
#include <linux/security.h>

static unsigned long mmio_address;
module_param_hw(mmio_address, ulong, iomem, 0);
MODULE_PARM_DESC(…) …;

static unsigned long read_far = …;
module_param(read_far, ulong, 0);
MODULE_PARM_DESC(…) …;

static unsigned v16(unsigned i)
{ … }

static unsigned v32(unsigned i)
{ … }

static void do_write_test(void __iomem *p)
{ … }

static void do_read_test(void __iomem *p)
{ … }

static void do_read_far_test(void __iomem *p)
{ … }

static void do_test(unsigned long size)
{ … }

/*
 * Tests how mmiotrace behaves in face of multiple ioremap / iounmaps in
 * a short time. We had a bug in deferred freeing procedure which tried
 * to free this region multiple times (ioremap can reuse the same address
 * for many mappings).
 */
static void do_test_bulk_ioremapping(void)
{ … }

static int __init init(void)
{ … }

static void __exit cleanup(void)
{ … }

module_init(init);
module_exit(cleanup);
MODULE_LICENSE(…) …;