From patchwork Thu Feb 11 15:33:23 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julien Grall X-Patchwork-Id: 8282121 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 03B65BEEE5 for ; Thu, 11 Feb 2016 16:08:00 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 17CE520251 for ; Thu, 11 Feb 2016 16:07:59 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E995420172 for ; Thu, 11 Feb 2016 16:07:57 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1aTtUy-0000Fw-5o; Thu, 11 Feb 2016 15:49:40 +0000 Received: from casper.infradead.org ([2001:770:15f::2]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1aTtUv-0008RP-Hh for linux-arm-kernel@bombadil.infradead.org; Thu, 11 Feb 2016 15:49:37 +0000 Received: from foss.arm.com ([217.140.101.70]) by casper.infradead.org with esmtp (Exim 4.85 #2 (Red Hat Linux)) id 1aTtG8-0008G9-G6 for linux-arm-kernel@lists.infradead.org; Thu, 11 Feb 2016 15:34:21 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 5FEAA5F0; Thu, 11 Feb 2016 07:32:55 -0800 (PST) Received: from e108454-lin.cambridge.arm.com (e108454-lin.cambridge.arm.com [10.1.215.28]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id ED1AC3F25E; Thu, 11 Feb 2016 07:33:40 -0800 (PST) From: Julien Grall To: kvmarm@lists.cs.columbia.edu Subject: [PATCH v2 5/6] irqchip/gic-v3: Parse and export virtual GIC information Date: Thu, 11 Feb 2016 15:33:23 +0000 Message-Id: <1455204804-31830-6-git-send-email-julien.grall@arm.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1455204804-31830-1-git-send-email-julien.grall@arm.com> References: <1455204804-31830-1-git-send-email-julien.grall@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160211_153420_857654_71A0ED7D X-CRM114-Status: GOOD ( 16.21 ) X-Spam-Score: -6.9 (------) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: wei@redhat.com, christoffer.dall@linaro.org, al.stone@linaro.org, kvm@vger.kernel.org, marc.zyngier@arm.com, linux-kernel@vger.kernel.org, Julien Grall , fu.wei@linaro.org, Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Jason Cooper MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Fill up the recently introduced gic_kvm_info with the virtual GIC information. Signed-off-by: Julien Grall --- Cc: Thomas Gleixner Cc: Jason Cooper Cc: Marc Zyngier Changes in v2: - Use 0 rather than a negative value to know when the maintenance IRQ is not present. - Use resource for vcpu and vctrl --- drivers/irqchip/irq-gic-v3.c | 36 ++++++++++++++++++++++++++++++++++ include/linux/irqchip/arm-gic-common.h | 1 + 2 files changed, 37 insertions(+) diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index d7be6dd..9992600 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -26,6 +26,7 @@ #include #include +#include #include #include @@ -53,6 +54,8 @@ struct gic_chip_data { static struct gic_chip_data gic_data __read_mostly; static struct static_key supports_deactivate = STATIC_KEY_INIT_TRUE; +static struct gic_kvm_info gic_v3_kvm_info; + #define gic_data_rdist() (this_cpu_ptr(gic_data.rdists.rdist)) #define gic_data_rdist_rd_base() (gic_data_rdist()->rd_base) #define gic_data_rdist_sgi_base() (gic_data_rdist_rd_base() + SZ_64K) @@ -811,6 +814,37 @@ static void gicv3_enable_quirks(void) #endif } +static void __init gic_of_setup_kvm_info(struct device_node *node) +{ + int ret; + struct resource r; + u32 gicv_idx; + + gic_v3_kvm_info.type = GIC_V3; + + gic_v3_kvm_info.maint_irq = irq_of_parse_and_map(node, 0); + + if (of_property_read_u32(node, "#redistributor-regions", + &gicv_idx)) + gicv_idx = 1; + + gicv_idx += 3; /* Also skip GICD, GICC, GICH */ + ret = of_address_to_resource(node, gicv_idx, &r); + if (!ret) { + if (!PAGE_ALIGNED(r.start)) + pr_warn("GICV physical address 0x%llx not page aligned\n", + (unsigned long long)r.start); + else if (!PAGE_ALIGNED(resource_size(&r))) + pr_warn("GICV size 0x%llx not a multiple of page size 0x%lx\n", + (unsigned long long)resource_size(&r), + PAGE_SIZE); + else + gic_v3_kvm_info.vcpu = r; + } + + gic_set_kvm_info(&gic_v3_kvm_info); +} + static int __init gic_of_init(struct device_node *node, struct device_node *parent) { void __iomem *dist_base; @@ -908,6 +942,8 @@ static int __init gic_of_init(struct device_node *node, struct device_node *pare gic_cpu_init(); gic_cpu_pm_init(); + gic_of_setup_kvm_info(node); + return 0; out_free: diff --git a/include/linux/irqchip/arm-gic-common.h b/include/linux/irqchip/arm-gic-common.h index f7723b9..15d68c6 100644 --- a/include/linux/irqchip/arm-gic-common.h +++ b/include/linux/irqchip/arm-gic-common.h @@ -15,6 +15,7 @@ enum gic_type { GIC_V2, + GIC_V3, }; struct gic_kvm_info {