From patchwork Thu Mar 24 17:53:39 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julien Grall X-Patchwork-Id: 64414 Delivered-To: patch@linaro.org Received: by 10.112.199.169 with SMTP id jl9csp808097lbc; Thu, 24 Mar 2016 10:54:37 -0700 (PDT) X-Received: by 10.98.13.88 with SMTP id v85mr14593290pfi.150.1458842075699; Thu, 24 Mar 2016 10:54:35 -0700 (PDT) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id q76si13626997pfa.60.2016.03.24.10.54.35; Thu, 24 Mar 2016 10:54:35 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752705AbcCXRyR (ORCPT + 29 others); Thu, 24 Mar 2016 13:54:17 -0400 Received: from foss.arm.com ([217.140.101.70]:53060 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752365AbcCXRyL (ORCPT ); Thu, 24 Mar 2016 13:54:11 -0400 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 5C03159A; Thu, 24 Mar 2016 10:53:05 -0700 (PDT) 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 566443F3DD; Thu, 24 Mar 2016 10:54:08 -0700 (PDT) From: Julien Grall To: kvmarm@lists.cs.columbia.edu Cc: christoffer.dall@linaro.org, marc.zyngier@arm.com, fu.wei@linaro.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, wei@redhat.com, al.stone@linaro.org, gg@slimlogic.co.uk, Julien Grall , Thomas Gleixner , Jason Cooper Subject: [PATCH v4 5/9] irqchip/gic-v3: Gather all ACPI specific data in a single structure Date: Thu, 24 Mar 2016 17:53:39 +0000 Message-Id: <1458842023-31853-6-git-send-email-julien.grall@arm.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1458842023-31853-1-git-send-email-julien.grall@arm.com> References: <1458842023-31853-1-git-send-email-julien.grall@arm.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The ACPI code requires to use global variales in order to collect information from the tables. To make clear those variables are ACPI specific, gather all of them in a single structure. Furthermore, even if some of the variables are not marked with __initdata, they are all only used during the initialization. Therefore, the new variable, which hold the structure, can be marked with __initdata. Signed-off-by: Julien Grall --- Cc: Thomas Gleixner Cc: Jason Cooper Cc: Marc Zyngier Changes in v4: - Rework commit message Changes in v3: - Patch added --- drivers/irqchip/irq-gic-v3.c | 60 ++++++++++++++++++++++++-------------------- 1 file changed, 33 insertions(+), 27 deletions(-) -- 1.9.1 diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index 5b7d3c2..50e87e6 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -968,19 +968,22 @@ out_unmap_dist: IRQCHIP_DECLARE(gic_v3, "arm,gic-v3", gic_of_init); #ifdef CONFIG_ACPI -static void __iomem *dist_base; -static struct redist_region *redist_regs __initdata; -static u32 nr_redist_regions __initdata; -static bool single_redist; +static struct +{ + void __iomem *dist_base; + struct redist_region *redist_regs; + u32 nr_redist_regions; + bool single_redist; +} acpi_data __initdata; static void __init gic_acpi_register_redist(phys_addr_t phys_base, void __iomem *redist_base) { static int count = 0; - redist_regs[count].phys_base = phys_base; - redist_regs[count].redist_base = redist_base; - redist_regs[count].single_redist = single_redist; + acpi_data.redist_regs[count].phys_base = phys_base; + acpi_data.redist_regs[count].redist_base = redist_base; + acpi_data.redist_regs[count].single_redist = acpi_data.single_redist; count++; } @@ -1008,7 +1011,7 @@ gic_acpi_parse_madt_gicc(struct acpi_subtable_header *header, { struct acpi_madt_generic_interrupt *gicc = (struct acpi_madt_generic_interrupt *)header; - u32 reg = readl_relaxed(dist_base + GICD_PIDR2) & GIC_PIDR2_ARCH_MASK; + u32 reg = readl_relaxed(acpi_data.dist_base + GICD_PIDR2) & GIC_PIDR2_ARCH_MASK; u32 size = reg == GIC_PIDR2_ARCH_GICv4 ? SZ_64K * 4 : SZ_64K * 2; void __iomem *redist_base; @@ -1025,7 +1028,7 @@ static int __init gic_acpi_collect_gicr_base(void) acpi_tbl_entry_handler redist_parser; enum acpi_madt_type type; - if (single_redist) { + if (acpi_data.single_redist) { type = ACPI_MADT_TYPE_GENERIC_INTERRUPT; redist_parser = gic_acpi_parse_madt_gicc; } else { @@ -1076,14 +1079,14 @@ static int __init gic_acpi_count_gicr_regions(void) count = acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_REDISTRIBUTOR, gic_acpi_match_gicr, 0); if (count > 0) { - single_redist = false; + acpi_data.single_redist = false; return count; } count = acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_INTERRUPT, gic_acpi_match_gicc, 0); if (count > 0) - single_redist = true; + acpi_data.single_redist = true; return count; } @@ -1103,7 +1106,7 @@ static bool __init acpi_validate_gic_table(struct acpi_subtable_header *header, if (count <= 0) return false; - nr_redist_regions = count; + acpi_data.nr_redist_regions = count; return true; } @@ -1114,25 +1117,28 @@ gic_acpi_init(struct acpi_subtable_header *header, const unsigned long end) { struct acpi_madt_generic_distributor *dist; struct fwnode_handle *domain_handle; + size_t size; int i, err; /* Get distributor base address */ dist = (struct acpi_madt_generic_distributor *)header; - dist_base = ioremap(dist->base_address, ACPI_GICV3_DIST_MEM_SIZE); - if (!dist_base) { + acpi_data.dist_base = ioremap(dist->base_address, + ACPI_GICV3_DIST_MEM_SIZE); + if (!acpi_data.dist_base) { pr_err("Unable to map GICD registers\n"); return -ENOMEM; } - err = gic_validate_dist_version(dist_base); + err = gic_validate_dist_version(acpi_data.dist_base); if (err) { - pr_err("No distributor detected at @%p, giving up", dist_base); + pr_err("No distributor detected at @%p, giving up", + acpi_data.dist_base); goto out_dist_unmap; } - redist_regs = kzalloc(sizeof(*redist_regs) * nr_redist_regions, - GFP_KERNEL); - if (!redist_regs) { + size = sizeof(*acpi_data.redist_regs) * acpi_data.nr_redist_regions; + acpi_data.redist_regs = kzalloc(size, GFP_KERNEL); + if (!acpi_data.redist_regs) { err = -ENOMEM; goto out_dist_unmap; } @@ -1141,14 +1147,14 @@ gic_acpi_init(struct acpi_subtable_header *header, const unsigned long end) if (err) goto out_redist_unmap; - domain_handle = irq_domain_alloc_fwnode(dist_base); + domain_handle = irq_domain_alloc_fwnode(acpi_data.dist_base); if (!domain_handle) { err = -ENOMEM; goto out_redist_unmap; } - err = gic_init_bases(dist_base, redist_regs, nr_redist_regions, 0, - domain_handle); + err = gic_init_bases(acpi_data.dist_base, acpi_data.redist_regs, + acpi_data.nr_redist_regions, 0, domain_handle); if (err) goto out_fwhandle_free; @@ -1158,12 +1164,12 @@ gic_acpi_init(struct acpi_subtable_header *header, const unsigned long end) out_fwhandle_free: irq_domain_free_fwnode(domain_handle); out_redist_unmap: - for (i = 0; i < nr_redist_regions; i++) - if (redist_regs[i].redist_base) - iounmap(redist_regs[i].redist_base); - kfree(redist_regs); + for (i = 0; i < acpi_data.nr_redist_regions; i++) + if (acpi_data.redist_regs[i].redist_base) + iounmap(acpi_data.redist_regs[i].redist_base); + kfree(acpi_data.redist_regs); out_dist_unmap: - iounmap(dist_base); + iounmap(acpi_data.dist_base); return err; } IRQCHIP_ACPI_DECLARE(gic_v3, ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR,