Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752450AbdF1PFe (ORCPT ); Wed, 28 Jun 2017 11:05:34 -0400 Received: from foss.arm.com ([217.140.101.70]:43346 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752338AbdF1PF0 (ORCPT ); Wed, 28 Jun 2017 11:05:26 -0400 From: Marc Zyngier To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu Cc: Christoffer Dall , Thomas Gleixner , Jason Cooper , Eric Auger , Shanker Donthineni , Mark Rutland Subject: [PATCH v2 28/52] irqchip/gic-v3-its: Set implementation defined bit to enable VLPIs Date: Wed, 28 Jun 2017 16:03:47 +0100 Message-Id: <20170628150411.15846-29-marc.zyngier@arm.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170628150411.15846-1-marc.zyngier@arm.com> References: <20170628150411.15846-1-marc.zyngier@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1962 Lines: 52 A long time ago, GITS_CTLR[1] used to be called GITC_CTLR.EnableVLPI. It has been subsequently deprecated and is now an "Implementation Defined" bit that may ot may not be set for GICv4. Brilliant. And the current crop of the FastModel requires that bit for VLPIs to be enabled. Oh well... Let's set it and find out what breaks. Signed-off-by: Marc Zyngier --- drivers/irqchip/irq-gic-v3-its.c | 7 +++++-- include/linux/irqchip/arm-gic-v3.h | 1 + 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 4979916cd3d7..3784bea2b994 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -2552,7 +2552,7 @@ static int its_force_quiescent(void __iomem *base) return 0; /* Disable the generation of all interrupts to this ITS */ - val &= ~GITS_CTLR_ENABLE; + val &= ~(GITS_CTLR_ENABLE | GITS_CTLR_ImDe); writel_relaxed(val, base + GITS_CTLR); /* Poll GITS_CTLR and wait until ITS becomes quiescent */ @@ -2818,7 +2818,10 @@ static int __init its_probe_one(struct resource *res, gits_write_cwriter(0, its->base + GITS_CWRITER); ctlr = readl_relaxed(its->base + GITS_CTLR); - writel_relaxed(ctlr | GITS_CTLR_ENABLE, its->base + GITS_CTLR); + ctlr |= GITS_CTLR_ENABLE; + if (its->is_v4) + ctlr |= GITS_CTLR_ImDe; + writel_relaxed(ctlr, its->base + GITS_CTLR); err = its_init_domain(handle, its); if (err) diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h index 6bc142cfa616..1ea576c8126f 100644 --- a/include/linux/irqchip/arm-gic-v3.h +++ b/include/linux/irqchip/arm-gic-v3.h @@ -298,6 +298,7 @@ #define GITS_TRANSLATER 0x10040 #define GITS_CTLR_ENABLE (1U << 0) +#define GITS_CTLR_ImDe (1U << 1) #define GITS_CTLR_ITS_NUMBER_SHIFT 4 #define GITS_CTLR_ITS_NUMBER (0xFU << GITS_CTLR_ITS_NUMBER_SHIFT) #define GITS_CTLR_QUIESCENT (1U << 31) -- 2.11.0