From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756129AbcEaSmm (ORCPT ); Tue, 31 May 2016 14:42:42 -0400 Received: from mail.eperm.de ([89.247.134.16]:35430 "EHLO mail.eperm.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750997AbcEaSml (ORCPT ); Tue, 31 May 2016 14:42:41 -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 , Pavel Machek , George Spelvin , linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 5/5] random: add interrupt callback to VMBus IRQ handler Date: Tue, 31 May 2016 20:39:59 +0200 Message-ID: <1989711.xkQFMZuXrz@positron.chronox.de> User-Agent: KMail/4.14.10 (Linux/4.4.9-300.fc23.x86_64; KDE/4.14.20; x86_64; ; ) In-Reply-To: <1668650.acZVSyjHlL@positron.chronox.de> References: <1668650.acZVSyjHlL@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 --- 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 ef89c0e..ac74716 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -948,6 +948,7 @@ 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 952f20f..e82f7e1 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -42,6 +42,7 @@ #include #include #include +#include #include "hyperv_vmbus.h" static struct acpi_device *hv_acpi_dev; @@ -806,6 +807,8 @@ static void vmbus_isr(void) else tasklet_schedule(hv_context.msg_dpc[cpu]); } + + add_interrupt_randomness(HYPERVISOR_CALLBACK_VECTOR, 0); } -- 2.7.2