[src/trunk]: src/sys/crypto/aes New sysctl node hw.aes_impl for selected AES ...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/626a16dd27ea
branches:  trunk
changeset: 1011460:626a16dd27ea
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Tue Jun 30 16:21:17 2020 +0000

description:
New sysctl node hw.aes_impl for selected AES implementation.

diffstat:

 sys/crypto/aes/aes_impl.c |  29 +++++++++++++++++++++++++++--
 1 files changed, 27 insertions(+), 2 deletions(-)

diffs (55 lines):

diff -r e80a9f5c21ac -r 626a16dd27ea sys/crypto/aes/aes_impl.c
--- a/sys/crypto/aes/aes_impl.c Tue Jun 30 16:20:00 2020 +0000
+++ b/sys/crypto/aes/aes_impl.c Tue Jun 30 16:21:17 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: aes_impl.c,v 1.2 2020/06/29 23:36:59 riastradh Exp $   */
+/*     $NetBSD: aes_impl.c,v 1.3 2020/06/30 16:21:17 riastradh Exp $   */
 
 /*-
  * Copyright (c) 2020 The NetBSD Foundation, Inc.
@@ -27,12 +27,13 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(1, "$NetBSD: aes_impl.c,v 1.2 2020/06/29 23:36:59 riastradh Exp $");
+__KERNEL_RCSID(1, "$NetBSD: aes_impl.c,v 1.3 2020/06/30 16:21:17 riastradh Exp $");
 
 #include <sys/types.h>
 #include <sys/kernel.h>
 #include <sys/module.h>
 #include <sys/once.h>
+#include <sys/sysctl.h>
 #include <sys/systm.h>
 
 #include <crypto/aes/aes.h>
@@ -43,6 +44,30 @@
 static const struct aes_impl   *aes_md_impl    __read_mostly;
 static const struct aes_impl   *aes_impl       __read_mostly;
 
+static int
+sysctl_hw_aes_impl(SYSCTLFN_ARGS)
+{
+       struct sysctlnode node;
+
+       KASSERTMSG(aes_impl != NULL,
+           "sysctl ran before AES implementation was selected");
+
+       node = *rnode;
+       node.sysctl_data = __UNCONST(aes_impl->ai_name);
+       node.sysctl_size = strlen(aes_impl->ai_name) + 1;
+       return sysctl_lookup(SYSCTLFN_CALL(&node));
+}
+
+SYSCTL_SETUP(sysctl_hw_aes_setup, "sysctl hw.aes_impl setup")
+{
+
+       sysctl_createv(clog, 0, NULL, NULL,
+           CTLFLAG_PERMANENT|CTLFLAG_READONLY, CTLTYPE_STRING, "aes_impl",
+           SYSCTL_DESCR("Selected AES implementation"),
+           sysctl_hw_aes_impl, 0, NULL, 0,
+           CTL_HW, CTL_CREATE, CTL_EOL);
+}
+
 /*
  * The timing of AES implementation selection is finicky:
  *