Module Name: src
Committed By: riastradh
Date: Tue Apr 21 03:53:51 UTC 2015
Modified Files:
src/sys/rump/librump/rumpkern: hyperentropy.c
Log Message:
Restore simplicity of rump hyperentropy `hardware RNG'.
To generate a diff of this commit:
cvs rdiff -u -r1.8 -r1.9 src/sys/rump/librump/rumpkern/hyperentropy.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/rump/librump/rumpkern/hyperentropy.c
diff -u src/sys/rump/librump/rumpkern/hyperentropy.c:1.8 src/sys/rump/librump/rumpkern/hyperentropy.c:1.9
--- src/sys/rump/librump/rumpkern/hyperentropy.c:1.8 Mon Apr 13 16:46:33 2015
+++ src/sys/rump/librump/rumpkern/hyperentropy.c Tue Apr 21 03:53:50 2015
@@ -1,4 +1,4 @@
-/* $NetBSD: hyperentropy.c,v 1.8 2015/04/13 16:46:33 riastradh Exp $ */
+/* $NetBSD: hyperentropy.c,v 1.9 2015/04/21 03:53:50 riastradh Exp $ */
/*
* Copyright (c) 2014 Antti Kantee. All Rights Reserved.
@@ -26,10 +26,9 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: hyperentropy.c,v 1.8 2015/04/13 16:46:33 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: hyperentropy.c,v 1.9 2015/04/21 03:53:50 riastradh Exp $");
#include <sys/param.h>
-#include <sys/atomic.h>
#include <sys/kmem.h>
#include <sys/rndpool.h>
#include <sys/rndsource.h>
@@ -39,12 +38,10 @@ __KERNEL_RCSID(0, "$NetBSD: hyperentropy
#include "rump_private.h"
static krndsource_t rndsrc;
-static volatile unsigned hyperentropy_wanted;
-static void *feedrandom_softint;
#define MAXGET (RND_POOLBITS/NBBY)
static void
-feedrandom(size_t bytes)
+feedrandom_cb(size_t bytes, void *cookie __unused)
{
uint8_t *rnddata;
size_t dsize;
@@ -56,42 +53,11 @@ feedrandom(size_t bytes)
kmem_intr_free(rnddata, MAXGET);
}
-static void
-feedrandom_intr(void *cookie __unused)
-{
-
- feedrandom(atomic_swap_uint(&hyperentropy_wanted, 0));
-}
-
-static void
-feedrandom_cb(size_t bytes, void *cookie __unused)
-{
- unsigned old, new;
-
- do {
- old = hyperentropy_wanted;
- new = ((MAXGET - old) < bytes? MAXGET : (old + bytes));
- } while (atomic_cas_uint(&hyperentropy_wanted, old, new) != old);
-
- softint_schedule(feedrandom_softint);
-}
-
void
rump_hyperentropy_init(void)
{
- if (rump_threads) {
- feedrandom_softint =
- softint_establish(SOFTINT_CLOCK|SOFTINT_MPSAFE,
- feedrandom_intr, NULL);
- KASSERT(feedrandom_softint != NULL);
- rndsource_setcb(&rndsrc, feedrandom_cb, &rndsrc);
- rnd_attach_source(&rndsrc, "rump_hyperent", RND_TYPE_VM,
- RND_FLAG_COLLECT_VALUE|RND_FLAG_HASCB);
- } else {
- /* without threads, just fill the pool */
- rnd_attach_source(&rndsrc, "rump_hyperent", RND_TYPE_VM,
- RND_FLAG_COLLECT_VALUE);
- feedrandom(MAXGET);
- }
+ rndsource_setcb(&rndsrc, &feedrandom_cb, &rndsrc);
+ rnd_attach_source(&rndsrc, "rump_hyperent", RND_TYPE_VM,
+ RND_FLAG_COLLECT_VALUE|RND_FLAG_HASCB);
}
