From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BCC85C1B0F2 for ; Wed, 20 Jun 2018 13:53:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6C79D20836 for ; Wed, 20 Jun 2018 13:53:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6C79D20836 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754324AbeFTNxQ (ORCPT ); Wed, 20 Jun 2018 09:53:16 -0400 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:37458 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754129AbeFTNxP (ORCPT ); Wed, 20 Jun 2018 09:53:15 -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 F176980D; Wed, 20 Jun 2018 06:53:14 -0700 (PDT) Received: from big-swifty.cambridge.arm.com (big-swifty.cambridge.arm.com [10.1.31.224]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6650F3F578; Wed, 20 Jun 2018 06:53:08 -0700 (PDT) From: Marc Zyngier To: linux-kernel@vger.kernel.org Cc: Thomas Gleixner , Ard Biesheuvel , Shanker Donthineni , Shameer Kolothum , MaJun , Laurentiu Tudor , Lei Zhang Subject: [PATCH 2/7] irqchip/gic-v3-its: Use full range of LPIs Date: Wed, 20 Jun 2018 14:52:29 +0100 Message-Id: <20180620135234.32101-3-marc.zyngier@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180620135234.32101-1-marc.zyngier@arm.com> References: <20180620135234.32101-1-marc.zyngier@arm.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org As we used to represent the LPI range using a bitmap, we were reducing the number of LPIs to at most 64k in order to preserve memory. With our new allocator, there is no such need, as dealing with 2^16 or 2^32 LPIs takes the same amount of memory. So let's use the number of IntID bits reported by the GIC instead of an arbitrary limit. Signed-off-by: Marc Zyngier --- drivers/irqchip/irq-gic-v3-its.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 6d148c2108b9..c98e49f8c341 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -1429,7 +1429,6 @@ static struct irq_chip its_irq_chip = { */ #define IRQS_PER_CHUNK_SHIFT 5 #define IRQS_PER_CHUNK (1UL << IRQS_PER_CHUNK_SHIFT) -#define ITS_MAX_LPI_NRBITS 16 /* 64K LPIs */ static DEFINE_MUTEX(lpi_range_lock); static LIST_HEAD(lpi_range_list); @@ -1610,7 +1609,7 @@ static int __init its_alloc_lpi_tables(void) { phys_addr_t paddr; - lpi_id_bits = min_t(u32, gic_rdists->id_bits, ITS_MAX_LPI_NRBITS); + lpi_id_bits = gic_rdists->id_bits; gic_rdists->prop_page = its_allocate_prop_table(GFP_NOWAIT); if (!gic_rdists->prop_page) { pr_err("Failed to allocate PROPBASE\n"); -- 2.17.1