From patchwork Mon Jun 13 15:48:35 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: 9173495 X-Patchwork-Delegate: herbert@gondor.apana.org.au Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 0F3396075D for ; Mon, 13 Jun 2016 15:51:07 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0127120223 for ; Mon, 13 Jun 2016 15:51:07 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EA2B02723E; Mon, 13 Jun 2016 15:51:06 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C02D225404 for ; Mon, 13 Jun 2016 15:51:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1424805AbcFMPvC (ORCPT ); Mon, 13 Jun 2016 11:51:02 -0400 Received: from imap.thunk.org ([74.207.234.97]:45064 "EHLO imap.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1424550AbcFMPt2 (ORCPT ); Mon, 13 Jun 2016 11:49:28 -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=9qUVMOtdKdOu9fKf7JzOeRCw4suDvV0z2/6WX30Wl+c=; b=su6qS5iEtg3iBTu8uw5pgWPqQP9HDic8Qm25V2i2loKteu+UNvpqo9sMD4sSwMYwkfEnEidf52E7JMkPPcLd2uY82Hds9hR4qgToLW/WO4ARYXOEXlXpcrn3UxbMxiLcRvVMpxaKOmc673lhYnp9n4yLzf3etHAgipxtiY3qpww=; Received: from root (helo=closure.thunk.org) by imap.thunk.org with local-esmtp (Exim 4.84_2) (envelope-from ) id 1bCU73-0005ae-1o; Mon, 13 Jun 2016 15:49:17 +0000 Received: by closure.thunk.org (Postfix, from userid 15806) id 11F4882F5C9; Mon, 13 Jun 2016 11:49:16 -0400 (EDT) From: Theodore Ts'o To: Linux Kernel Developers List Cc: linux-crypto@vger.kernel.org, smueller@chronox.de, herbert@gondor.apana.org.au, andi@firstfloor.org, sandyinchina@gmail.com, jsd@av8n.com, hpa@zytor.com, stable@kernel.org, Stephan Mueller , Theodore Ts'o Subject: [PATCH 3/7] random: add interrupt callback to VMBus IRQ handler Date: Mon, 13 Jun 2016 11:48:35 -0400 Message-Id: <1465832919-11316-4-git-send-email-tytso@mit.edu> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1465832919-11316-1-git-send-email-tytso@mit.edu> References: <1465832919-11316-1-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-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. Cc: stable@kernel.org 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 74596d3..64e35a4 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -946,6 +946,7 @@ 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); }