From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753282AbcD2G1I (ORCPT ); Fri, 29 Apr 2016 02:27:08 -0400 Received: from mail.eperm.de ([89.247.134.16]:54134 "EHLO mail.eperm.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752860AbcD2GZv (ORCPT ); Fri, 29 Apr 2016 02:25:51 -0400 From: Stephan Mueller To: herbert@gondor.apana.org.au Cc: Ted Tso , Andi Kleen , sandyinchina@gmail.com, Jason Cooper , John Denker , "H. Peter Anvin" , joe@perches.com, Pavel Machek , linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 5/5] random: add interrupt callback to VMBus IRQ handler Date: Fri, 29 Apr 2016 08:24:43 +0200 Message-ID: <2028519.e7rxLlMInB@positron.chronox.de> User-Agent: KMail/4.14.10 (Linux/4.4.7-300.fc23.x86_64; KDE/4.14.18; x86_64; ; ) In-Reply-To: <2346517.m8UHYeMDSf@positron.chronox.de> References: <2346517.m8UHYeMDSf@positron.chronox.de> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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 92c2174..9632976 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -947,6 +947,7 @@ 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); } -- 2.5.5