From patchwork Wed May 4 19:25:50 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: 9017921 X-Patchwork-Delegate: herbert@gondor.apana.org.au Return-Path: X-Original-To: patchwork-linux-crypto@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 0E4BCBF29F for ; Wed, 4 May 2016 19:27:02 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 13ECF203C1 for ; Wed, 4 May 2016 19:27:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 30432203C0 for ; Wed, 4 May 2016 19:27:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754670AbcEDT0j (ORCPT ); Wed, 4 May 2016 15:26:39 -0400 Received: from imap.thunk.org ([74.207.234.97]:46938 "EHLO imap.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754076AbcEDT0K (ORCPT ); Wed, 4 May 2016 15:26:10 -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=n7qXpRuNvKEmJBFEnM1JI65Zef8WDrt5nGIZnv+T5x4=; b=lK1lb4nN2lVx1D6JChmB+hULm3tXgh3fmPC3exsWEdnLY4w6rECVPbbksDBXZvRaouElaanJPP1OcFku8lNMpuL2DOb2abRAmI9cXNJTgYW8KEwdvf626gJRKaP6y63i6IcKp8mevd749FAYNGGjQIfaumaBxP3SBX1onrqRLpQ=; Received: from root (helo=closure.thunk.org) by imap.thunk.org with local-esmtp (Exim 4.84_2) (envelope-from ) id 1ay2Qo-0007E9-3g; Wed, 04 May 2016 19:25:58 +0000 Received: by closure.thunk.org (Postfix, from userid 15806) id 8D62E82015E; Wed, 4 May 2016 15:25:56 -0400 (EDT) From: Theodore Ts'o To: Linux Kernel Developers List 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 3/4] random: add interrupt callback to VMBus IRQ handler Date: Wed, 4 May 2016 15:25:50 -0400 Message-Id: <1462389951-29439-4-git-send-email-tytso@mit.edu> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1462389951-29439-1-git-send-email-tytso@mit.edu> References: <1462389951-29439-1-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=-8.9 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 b970db6..897c75e 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -1134,6 +1134,7 @@ 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); }