From patchwork Mon Oct 23 00:40:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yu-Chien Peter Lin X-Patchwork-Id: 13432218 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9C32FC25B43 for ; Mon, 23 Oct 2023 00:46:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=x+436z5Xc9InRzl9AVIgUvSTRm+PF+iumGnMtNfufFk=; b=mdJYk98g478HDP 8DDsCxuQZQZNGuTb3oqdijzS0A7EclC43KSQSzdmQ3uyYjaju8HI9ZBVNJm2rVlki//JyqEBupQ1l H91J7jf31YOZz72JA1rJxRWv1zA9wmcw2THlDLWvjyh/+3ipPY1XYdNGHhbzDRVjnycnxG9Zx9AoV 6t6SClqrADFoz4pOXPN7OmKRhlLy2lAjzLoqKDfJrZAf8augwQh81TwUhsarFBPa9xrfOh98GLcbX wP/1PsQ2vxgUKHsklaJl6UBoJw6EjvO5PyfCTI/OK687juHazkr0jwzwVSWm1+oA+AKYy2jKkkxAM GvqRilAn9R3qOno138vg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1quj4y-00680X-0u; Mon, 23 Oct 2023 00:46:00 +0000 Received: from 60-248-80-70.hinet-ip.hinet.net ([60.248.80.70] helo=Atcsqr.andestech.com) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1quj4b-0067mw-0D; Mon, 23 Oct 2023 00:45:38 +0000 Received: from mail.andestech.com (ATCPCS16.andestech.com [10.0.1.222]) by Atcsqr.andestech.com with ESMTP id 39N0ij19079679; Mon, 23 Oct 2023 08:44:45 +0800 (+08) (envelope-from peterlin@andestech.com) Received: from swlinux02.andestech.com (10.0.15.183) by ATCPCS16.andestech.com (10.0.1.222) with Microsoft SMTP Server id 14.3.498.0; Mon, 23 Oct 2023 08:44:41 +0800 From: Yu Chien Peter Lin To: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v3 RESEND 06/13] perf: RISC-V: Eliminate redundant IRQ enable/disable operations Date: Mon, 23 Oct 2023 08:40:53 +0800 Message-ID: <20231023004100.2663486-7-peterlin@andestech.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231023004100.2663486-1-peterlin@andestech.com> References: <20231023004100.2663486-1-peterlin@andestech.com> MIME-Version: 1.0 X-Originating-IP: [10.0.15.183] X-DNSRBL: X-MAIL: Atcsqr.andestech.com 39N0ij19079679 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231022_174537_548447_BDB0F8F8 X-CRM114-Status: UNSURE ( 8.40 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The IRQ enable/disable operations are already performed by the IRQ chip functions riscv_intc_irq_unmask()/riscv_intc_irq_mask() during enable_percpu_irq()/disable_percpu_irq(). We can just do it once. Signed-off-by: Yu Chien Peter Lin --- This patch allows us to drop unnecessary ALT_SBI_PMU_OVF_{DISABLE,ENABLE} in the last PATCH3 [1]. [1] https://patchwork.kernel.org/project/linux-riscv/patch/20230907021635.1002738-4-peterlin@andestech.com/ Changes v1 -> v2: - New patch Changes v2 -> v3: - No change --- drivers/perf/riscv_pmu_sbi.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/perf/riscv_pmu_sbi.c b/drivers/perf/riscv_pmu_sbi.c index 96c7f670c8f0..f340db9ce1e2 100644 --- a/drivers/perf/riscv_pmu_sbi.c +++ b/drivers/perf/riscv_pmu_sbi.c @@ -778,7 +778,6 @@ static int pmu_sbi_starting_cpu(unsigned int cpu, struct hlist_node *node) if (riscv_pmu_use_irq) { cpu_hw_evt->irq = riscv_pmu_irq; csr_clear(CSR_IP, BIT(riscv_pmu_irq_num)); - csr_set(CSR_IE, BIT(riscv_pmu_irq_num)); enable_percpu_irq(riscv_pmu_irq, IRQ_TYPE_NONE); } @@ -789,7 +788,6 @@ static int pmu_sbi_dying_cpu(unsigned int cpu, struct hlist_node *node) { if (riscv_pmu_use_irq) { disable_percpu_irq(riscv_pmu_irq); - csr_clear(CSR_IE, BIT(riscv_pmu_irq_num)); } /* Disable all counters access for user mode now */