From patchwork Mon May 2 06:26:53 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Theodore Ts'o X-Patchwork-Id: 8990201 X-Patchwork-Delegate: herbert@gondor.apana.org.au Return-Path: X-Original-To: patchwork-linux-crypto@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 941F89F39D for ; Mon, 2 May 2016 06:27:22 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B229E2015A for ; Mon, 2 May 2016 06:27:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8F8BE20154 for ; Mon, 2 May 2016 06:27:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752993AbcEBG1T (ORCPT ); Mon, 2 May 2016 02:27:19 -0400 Received: from imap.thunk.org ([74.207.234.97]:34738 "EHLO imap.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752840AbcEBG1Q (ORCPT ); Mon, 2 May 2016 02:27:16 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=thunk.org; s=ef5046eb; h=References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From; bh=OJXVSzjd5OeGwhB/TLDltlLD/NwuCAgxBGrkN9NC044=; b=Nkwy7FN/iiAp1SfJj2Kqc0wjQ+RqVoojY9JVUZbS32X4L0lYllcDnPRfokZ4SIjWjCXoijYcNmcBqNZGJ41R1WZQbt5f8PbMZR9yKnsqaDlabeOhwcdJjXmtYZF5bGea4biFVZ9sA3OYjm3LVrgNDgI5P3dFR1SY11LDZ+EvTSU=; Received: from root (helo=closure.thunk.org) by imap.thunk.org with local-esmtp (Exim 4.84) (envelope-from ) id 1ax7Ju-0005Cz-Bw; Mon, 02 May 2016 06:27:02 +0000 Received: by closure.thunk.org (Postfix, from userid 15806) id D9EC882015E; Mon, 2 May 2016 02:27:00 -0400 (EDT) From: Theodore Ts'o To: linux-kernel@vger.kernel.org Cc: smueller@chronox.de, herbert@gondor.apana.org.au, andi@firstfloor.org, sandyinchina@gmail.com, cryptography@lakedaemon.net, jsd@av8n.com, hpa@zytor.com, linux-crypto@vger.kernel.org, Stephan Mueller , Theodore Ts'o Subject: [PATCH 3/3] random: add interrupt callback to VMBus IRQ handler Date: Mon, 2 May 2016 02:26:53 -0400 Message-Id: <1462170413-7164-4-git-send-email-tytso@mit.edu> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1462170413-7164-1-git-send-email-tytso@mit.edu> References: <1462170413-7164-1-git-send-email-tytso@mit.edu> X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: tytso@thunk.org X-SA-Exim-Scanned: No (on imap.thunk.org); SAEximRunCond expanded to false Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org X-Spam-Status: No, score=-7.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Stephan Mueller The Hyper-V Linux Integration Services use the VMBus implementation for communication with the Hypervisor. VMBus registers its own interrupt handler that completely bypasses the common Linux interrupt handling. This implies that the interrupt entropy collector is not triggered. This patch adds the interrupt entropy collection callback into the VMBus interrupt handler function. Signed-off-by: Stephan Mueller Signed-off-by: Stephan Mueller Signed-off-by: Theodore Ts'o --- drivers/char/random.c | 1 + drivers/hv/vmbus_drv.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/drivers/char/random.c b/drivers/char/random.c index d5bb3b3..c3f17c9 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -1133,6 +1133,7 @@ void add_interrupt_randomness(int irq, int irq_flags) /* award one bit for the contents of the fast pool */ credit_entropy_bits(r, credit + 1); } +EXPORT_SYMBOL_GPL(add_interrupt_randomness); #ifdef CONFIG_BLOCK void add_disk_randomness(struct gendisk *disk) diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index 64713ff..9af61bb 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -41,6 +41,7 @@ #include #include #include +#include #include "hyperv_vmbus.h" static struct acpi_device *hv_acpi_dev; @@ -801,6 +802,8 @@ static void vmbus_isr(void) else tasklet_schedule(hv_context.msg_dpc[cpu]); } + + add_interrupt_randomness(HYPERVISOR_CALLBACK_VECTOR, 0); }