On 1/15/20 2:35 AM, Stephan Müller wrote: > > CC: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx> > CC: "Alexander E. Patrakov" <patrakov@xxxxxxxxx> > CC: "Ahmed S. Darwish" <darwish.07@xxxxxxxxx> > CC: "Theodore Y. Ts'o" <tytso@xxxxxxx> > CC: Willy Tarreau <w@xxxxxx> > CC: Matthew Garrett <mjg59@xxxxxxxxxxxxx> > CC: Vito Caputo <vcaputo@xxxxxxxxxxx> > CC: Andreas Dilger <adilger.kernel@xxxxxxxxx> > CC: Jan Kara <jack@xxxxxxx> > CC: Ray Strode <rstrode@xxxxxxxxxx> > CC: William Jon McCann <mccann@xxxxxxx> > CC: zhangjs <zachary@xxxxxxxxxxxxxxxx> > CC: Andy Lutomirski <luto@xxxxxxxxxx> > CC: Florian Weimer <fweimer@xxxxxxxxxx> > CC: Lennart Poettering <mzxreary@xxxxxxxxxxx> > CC: Nicolai Stange <nstange@xxxxxxx> > Reviewed-by: Roman Drahtmueller <draht@xxxxxxxxxxxxxx> > Tested-by: Roman Drahtmüller <draht@xxxxxxxxxxxxxx> > Tested-by: Marcelo Henrique Cerri <marcelo.cerri@xxxxxxxxxxxxx> > Tested-by: Neil Horman <nhorman@xxxxxxxxxx> > Signed-off-by: Stephan Mueller <smueller@xxxxxxxxxx> > --- > drivers/char/lrng/Kconfig | 16 ++ > drivers/char/lrng/Makefile | 1 + > drivers/char/lrng/lrng_testing.c | 271 +++++++++++++++++++++++++++++++ > 3 files changed, 288 insertions(+) > create mode 100644 drivers/char/lrng/lrng_testing.c > > diff --git a/drivers/char/lrng/lrng_testing.c b/drivers/char/lrng/lrng_testing.c > new file mode 100644 > index 000000000000..0e287eccd622 > --- /dev/null > +++ b/drivers/char/lrng/lrng_testing.c > @@ -0,0 +1,271 @@ > +// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause > +/* > + * Linux Random Number Generator (LRNG) Raw entropy collection tool > + * > + * Copyright (C) 2019 - 2020, Stephan Mueller <smueller@xxxxxxxxxx> > + */ > + > +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt > + > +#include <linux/atomic.h> > +#include <linux/bug.h> > +#include <linux/debugfs.h> > +#include <linux/module.h> > +#include <linux/sched.h> > +#include <linux/sched/signal.h> > +#include <linux/slab.h> > +#include <linux/string.h> > +#include <linux/types.h> > +#include <linux/uaccess.h> > +#include <linux/workqueue.h> > +#include <asm/errno.h> > + > +#include "lrng_internal.h" > + > +#define LRNG_TESTING_RINGBUFFER_SIZE 1024 > +#define LRNG_TESTING_RINGBUFFER_MASK (LRNG_TESTING_RINGBUFFER_SIZE - 1) > + > +static u32 lrng_testing_rb[LRNG_TESTING_RINGBUFFER_SIZE]; > +static u32 lrng_rb_reader = 0; > +static u32 lrng_rb_writer = 0; > +static atomic_t lrng_testing_enabled = ATOMIC_INIT(0); > + > +static DECLARE_WAIT_QUEUE_HEAD(lrng_raw_read_wait); > +static DEFINE_SPINLOCK(lrng_raw_lock); > + > +/* > + * 0 ==> No boot test, gathering of runtime data allowed > + * 1 ==> Boot test enabled and ready for collecting data, gathering runtime > + * data is disabled > + * 2 ==> Boot test completed and disabled, gathering of runtime data is > + * disabled > + */ > +static u32 boot_test = 0; > +module_param(boot_test, uint, 0644); > +MODULE_PARM_DESC(boot_test, "Enable gathering boot time entropy of the first" > + " entropy events"); One line for the string, please. -- ~Randy Reported-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
