From patchwork Mon Sep 16 21:32:07 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vineet Gupta X-Patchwork-Id: 1163107 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:e::133; helo=bombadil.infradead.org; envelope-from=linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=synopsys.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="ivCLrbUP"; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=synopsys.com header.i=@synopsys.com header.b="VXoZ1nTd"; dkim-atps=neutral Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 46XKFq59wyz9sP6 for ; Tue, 17 Sep 2019 07:32:15 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc: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:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=6f/FsnXf5jOO0TDeXHNihTuWf3LGrsm8v/HST6MGDfo=; b=ivCLrbUPjHNIGf jA9+VYKZ+N25o5sd4O+5/28VKhdCxgAPHd5D5/XaMCAtvbK0pec/736v4bBgy+s6XzSzl+eMJvjaD jOtbxhQ+T9SQfD2eWeNGpmskvh+LOonQl8MdPAi3h7mY5XfP9MUukhr462NUPRqUshtCDsz8jrBxL BOSwDlPVUzjY6PLhhvHARzzyWgD99gXDUrAmLyuMW6IrQ373zaUZ1Q1V+f5JrMXY7Fek7Q5f2peKO WtElzq2G+KByoMWKB1IQzNRSMRLDuK+8GjB52m1N3mcwP1h3osS0dvVwMx/0YEBSzb6pvb+xSBs+G PW2g5lO6k5WI1TAIf6jw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1i9ybV-0003m0-RR; Mon, 16 Sep 2019 21:32:13 +0000 Received: from dc2-smtprelay2.synopsys.com ([198.182.61.142] helo=smtprelay-out1.synopsys.com) by bombadil.infradead.org with esmtps (Exim 4.92.2 #3 (Red Hat Linux)) id 1i9ybR-0003je-NF for linux-snps-arc@lists.infradead.org; Mon, 16 Sep 2019 21:32:12 +0000 Received: from mailhost.synopsys.com (dc2-mailhost2.synopsys.com [10.12.135.162]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by smtprelay-out1.synopsys.com (Postfix) with ESMTPS id 93274C0489 for ; Mon, 16 Sep 2019 21:32:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1568669529; bh=wNxsR4nIFgXPEUfMGdgL986mXnOyIY1a/m2wHiedRLQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VXoZ1nTdb5cnR2XVXVnRDtjEPwI7xGmSPJyUAuNMhCSV2Grn96xsQxcfGG3rL5C8O 2TN0Rr9Y8SRnOZzw62ruvsSJtbmyCA3PRu6TjK92F7UVz1Wi5we5IcBWe/zgGSlwBn WjQIJInVAj8RqCFUqegud0Q6k4eIBl/wyg0kc0Xoi6JQa9IF8rf7aoCpnOQ8+8IxV1 fgs/tkbcsv2kKgGs0GLuU/+eCoBw32G/4C3LWevjfsUNTz50fqi5s9KKuA9ue64ztM 2OMtvFAKgSR8E9QL53frn2fw2sIuGvUs99ebH/fNHxFM1/m4yQWJBLu8m13fHWW49g 0tFxlkmhxbLwA== Received: from vineetg-Latitude-E7450.internal.synopsys.com (vineetg-latitude-e7450.internal.synopsys.com [10.10.161.61]) by mailhost.synopsys.com (Postfix) with ESMTP id 77966A0247; Mon, 16 Sep 2019 21:32:09 +0000 (UTC) From: Vineet Gupta To: linux-snps-arc@lists.infradead.org Subject: [PATCH 6/6] ARC: mm: tlb flush optim: elide redundant uTLB invalidates for MMUv3 Date: Mon, 16 Sep 2019 14:32:07 -0700 Message-Id: <20190916213207.12792-7-vgupta@synopsys.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190916213207.12792-1-vgupta@synopsys.com> References: <20190916213207.12792-1-vgupta@synopsys.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190916_143209_761694_3C9AF3CD X-CRM114-Status: UNSURE ( 8.53 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Vineet Gupta , Alexey Brodkin Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org For MMUv3 (and prior) the flush_tlb_{range,mm,page} API use the MMU TLBWrite cmd which already nukes the entire uTLB, so NO need for additional IVUTLB cmd from utlb_invalidate() - hence this patch local_flush_tlb_all() is special since it uses a weaker TLBWriteNI cmd (prec commit) to shoot down JTLB, hence we retain the explicit uTLB flush Signed-off-by: Vineet Gupta --- arch/arc/mm/tlb.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/arch/arc/mm/tlb.c b/arch/arc/mm/tlb.c index 210d807983dd..c340acd989a0 100644 --- a/arch/arc/mm/tlb.c +++ b/arch/arc/mm/tlb.c @@ -339,8 +339,6 @@ void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, } } - utlb_invalidate(); - local_irq_restore(flags); } @@ -369,8 +367,6 @@ void local_flush_tlb_kernel_range(unsigned long start, unsigned long end) start += PAGE_SIZE; } - utlb_invalidate(); - local_irq_restore(flags); } @@ -391,7 +387,6 @@ void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page) if (asid_mm(vma->vm_mm, cpu) != MM_CTXT_NO_ASID) { tlb_entry_erase((page & PAGE_MASK) | hw_pid(vma->vm_mm, cpu)); - utlb_invalidate(); } local_irq_restore(flags);