From nobody Sun Apr 28 09:32:40 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1557411927; cv=none; d=zoho.com; s=zohoarc; b=Fw047PT8Gi2KXUkNbah4iCdNjeSydjUt5xLEyXxD6JNWzdTZxfcB5glMvvJmyzGw7MDwPehRPZhdYITa60ATFlEEmsj0Pj4IGDrtazZkDVyuGWkfggbkQ/buT1xOjUaKWamwMo3eeOr4qSNVSJ99WCZcYxFstEeh9K+Z07O78JM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1557411927; h=Content-Transfer-Encoding:Cc:Date:From:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Sender:Subject:To:ARC-Authentication-Results; bh=W+hJ4+ISdgtEVNK7rirJQ49vfuZHxkHFxC/z63GPVvg=; b=nrmh/omS4coD0ejM6MWbmKOT49NUfkLtyQzmwg/Z0Yr7YsiepRbHvTG5NmbSg+W6eLrbIm2Cx5YmRwmM8I29KWaXal0Pbo3+JTSAKRlJXMw1GZzO0ErQljbFqWrQn4iMoe/e9IGpXo+BY6d1nClqY95K2mS8Ntt7u5k3PrKWv4k= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1557411927476897.2330094465357; Thu, 9 May 2019 07:25:27 -0700 (PDT) Received: from localhost ([127.0.0.1]:55561 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hOjzA-00055u-AT for importer@patchew.org; Thu, 09 May 2019 10:25:24 -0400 Received: from eggs.gnu.org ([209.51.188.92]:60751) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hOjy1-0004Uj-JI for qemu-devel@nongnu.org; Thu, 09 May 2019 10:24:14 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hOjy0-0000Kf-M5 for qemu-devel@nongnu.org; Thu, 09 May 2019 10:24:13 -0400 Received: from mx1.redhat.com ([209.132.183.28]:36202) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hOjy0-0000KU-H4 for qemu-devel@nongnu.org; Thu, 09 May 2019 10:24:12 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 8A8603007E66; Thu, 9 May 2019 14:24:11 +0000 (UTC) Received: from thinkpad.redhat.com (unknown [10.40.205.9]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5337D646A1; Thu, 9 May 2019 14:23:43 +0000 (UTC) From: Laurent Vivier To: qemu-devel@nongnu.org Date: Thu, 9 May 2019 16:23:42 +0200 Message-Id: <20190509142342.6132-1-lvivier@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.45]); Thu, 09 May 2019 14:24:11 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [RFC] rng-builtin: add an RNG backend that uses qemu_guest_getrandom() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Laurent Vivier , Amit Shah , Kashyap Chamarthy , Richard Henderson , Markus Armbruster , "Richard W . M . Jones" Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" Add a new RNG backend using QEMU builtin getrandom function. It can be created with "-object rng-builtin". This patch applies on top of "[PATCH v4 00/24] Add qemu_getrandom and ARMv8.5-RNG etc" Based-on: <20190506173353.32206-1-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier Reviewed-by: Richard Henderson --- backends/Makefile.objs | 2 +- backends/rng-builtin.c | 56 ++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 57 insertions(+), 1 deletion(-) create mode 100644 backends/rng-builtin.c diff --git a/backends/Makefile.objs b/backends/Makefile.objs index ff619d31b461..8da4a508d97b 100644 --- a/backends/Makefile.objs +++ b/backends/Makefile.objs @@ -1,4 +1,4 @@ -common-obj-y +=3D rng.o rng-egd.o +common-obj-y +=3D rng.o rng-egd.o rng-builtin.o common-obj-$(CONFIG_POSIX) +=3D rng-random.o =20 common-obj-$(CONFIG_TPM) +=3D tpm.o diff --git a/backends/rng-builtin.c b/backends/rng-builtin.c new file mode 100644 index 000000000000..b1264b745407 --- /dev/null +++ b/backends/rng-builtin.c @@ -0,0 +1,56 @@ +/* + * QEMU Builtin Random Number Generator Backend + * + * This work is licensed under the terms of the GNU GPL, version 2 or late= r. + * See the COPYING file in the top-level directory. + */ + +#include "qemu/osdep.h" +#include "sysemu/rng.h" +#include "qapi/error.h" +#include "qapi/qmp/qerror.h" +#include "qemu/main-loop.h" +#include "qemu/guest-random.h" + +#define TYPE_RNG_BUILTIN "rng-builtin" +#define RNG_BUILTIN(obj) OBJECT_CHECK(RngBuiltin, (obj), TYPE_RNG_BUILTIN) + +typedef struct RngBuiltin { + RngBackend parent; +} RngBuiltin; + +static void rng_builtin_request_entropy(RngBackend *b, RngRequest *req) +{ + RngBuiltin *s =3D RNG_BUILTIN(b); + + while (!QSIMPLEQ_EMPTY(&s->parent.requests)) { + RngRequest *req =3D QSIMPLEQ_FIRST(&s->parent.requests); + + qemu_guest_getrandom_nofail(req->data, req->size); + + req->receive_entropy(req->opaque, req->data, req->size); + + rng_backend_finalize_request(&s->parent, req); + } +} + +static void rng_builtin_class_init(ObjectClass *klass, void *data) +{ + RngBackendClass *rbc =3D RNG_BACKEND_CLASS(klass); + + rbc->request_entropy =3D rng_builtin_request_entropy; +} + +static const TypeInfo rng_builtin_info =3D { + .name =3D TYPE_RNG_BUILTIN, + .parent =3D TYPE_RNG_BACKEND, + .instance_size =3D sizeof(RngBuiltin), + .class_init =3D rng_builtin_class_init, +}; + +static void register_types(void) +{ + type_register_static(&rng_builtin_info); +} + +type_init(register_types); --=20 2.20.1