From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1423302AbcE3VmA (ORCPT ); Mon, 30 May 2016 17:42:00 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:53278 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1422884AbcE3VLD (ORCPT ); Mon, 30 May 2016 17:11:03 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Peter Maydell , Marc Zyngier Subject: [PATCH 4.6 027/100] irqchip/gic-v3: Configure all interrupts as non-secure Group-1 Date: Mon, 30 May 2016 13:49:22 -0700 Message-Id: <20160530204909.325250148@linuxfoundation.org> X-Mailer: git-send-email 2.8.3 In-Reply-To: <20160530204908.422037419@linuxfoundation.org> References: <20160530204908.422037419@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Marc Zyngier commit 7c9b973061b03af62734f613f6abec46c0dd4a88 upstream. The GICv3 driver wrongly assumes that it runs on the non-secure side of a secure-enabled system, while it could be on a system with a single security state, or a GICv3 with GICD_CTLR.DS set. Either way, it is important to configure this properly, or interrupts will simply not be delivered on this HW. Reported-by: Peter Maydell Tested-by: Peter Maydell Signed-off-by: Marc Zyngier Signed-off-by: Greg Kroah-Hartman --- drivers/irqchip/irq-gic-v3.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -390,6 +390,15 @@ static void __init gic_dist_init(void) writel_relaxed(0, base + GICD_CTLR); gic_dist_wait_for_rwp(); + /* + * Configure SPIs as non-secure Group-1. This will only matter + * if the GIC only has a single security state. This will not + * do the right thing if the kernel is running in secure mode, + * but that's not the intended use case anyway. + */ + for (i = 32; i < gic_data.irq_nr; i += 32) + writel_relaxed(~0, base + GICD_IGROUPR + i / 8); + gic_dist_config(base, gic_data.irq_nr, gic_dist_wait_for_rwp); /* Enable distributor with ARE, Group1 */ @@ -507,6 +516,9 @@ static void gic_cpu_init(void) rbase = gic_data_rdist_sgi_base(); + /* Configure SGIs/PPIs as non-secure Group-1 */ + writel_relaxed(~0, rbase + GICR_IGROUPR0); + gic_cpu_config(rbase, gic_redist_wait_for_rwp); /* Give LPIs a spin */