From patchwork Wed Aug 11 00:42:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vineet Gupta X-Patchwork-Id: 1515539 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) 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; dkim=pass (2048-bit key; secure) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=S4h6JBs4; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=DJg+8ueS; 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 4Gkrf93hdXz9sX3 for ; Wed, 11 Aug 2021 10:43:29 +1000 (AEST) 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:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Fe7G/Q3uK+fw5I8rrTyNGfxa2u3PRYyN4eXJvNMoen4=; b=S4h6JBs4pZNbgY KIz2wLu6/KKkZvPlbEh3wDcIDzfTr/vP8a3Aen2h/K4y6t73xHqYMgVFs+0Uvwls1/7GTsbHwlcFM QF1SSMi0SIgeHiWyD2YJMtFIFoX4wSjXhkDhTaclzAWt1F4Rxl+aq/D31vPERBpvllcH8NTXByHn4 u6kDDJNtyjZY+UHBKJu+Sp59yBH+8uGvfQ8VRY6Izu8fI4EAFoEka/jfi4LRjdzQIH35mBqyFO/cV XaKZf1/edWqxlZAAcMNJW/2tkRL6SHOag0zJkaq+yniOw7RU2L+ImqnVZRRopjcm0U/PvCMO6k1Y8 55aipSCtuj+49Hu6QEZw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mDcL8-0056ly-Ng; Wed, 11 Aug 2021 00:43:27 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mDcL3-0056fH-E9 for linux-snps-arc@lists.infradead.org; Wed, 11 Aug 2021 00:43:23 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id E229B60EDF; Wed, 11 Aug 2021 00:43:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1628642601; bh=rQG6R4IYtK009L51KoLDJPAjJafHG5PoJg6sbJHan6E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DJg+8ueSH0w/uLEJilaVjKfT7/1op5f9m25OKoODB2hgOotmDiKaiWNsqlSSJFjWa I184RC/qwaFr3Qxsf9BJ26Wjz+PnlteUyda2kOpu1K6VbC/nasY6d5hW8DYjn/WWDL hDzArlo4G20vmIyrDFCP94XrRzXCnTmzUfnY9X2IYALSRgT66zRyKRXAJliAEtpt6E Y8r94qPZjjfFn2porTkDsupsx0dUBiMIqZzn6ww0B0d1Sv1nWhSn7L5BYLwxWXm3kq L2IG9lDzZVjkulLxDzXvYk2Tx4sRr1sIbfds+xs2KQPooGRGNYWAXU42SlIi64Pbf5 N7KCYFHYLALnA== From: Vineet Gupta To: linux-snps-arc@lists.infradead.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Anshuman Khandual , Mike Rapoport , Vineet Gupta Subject: [PATCH 11/18] ARC: mm: move MMU specific bits out of entry code Date: Tue, 10 Aug 2021 17:42:51 -0700 Message-Id: <20210811004258.138075-12-vgupta@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210811004258.138075-1-vgupta@kernel.org> References: <20210811004258.138075-1-vgupta@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210810_174321_575362_C73D9BB0 X-CRM114-Status: UNSURE ( 9.06 ) X-CRM114-Notice: Please train this message. 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Content preview: Signed-off-by: Vineet Gupta --- arch/arc/kernel/entry.S | 6 ------ arch/arc/mm/tlb.c | 3 +++ 2 files changed, 3 insertions(+), 6 deletions(-) diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S index 2cb8dfe866b6..684efd094520 100644 --- a/arch/arc/kernel/entry.S +++ b/arch/arc/kernel/entry.S @@ -101,12 +101,6 @@ ENTRY(EV_Machine [...] Content analysis details: (-5.4 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [198.145.29.99 listed in list.dnswl.org] -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_AU Message has a valid DKIM or DK signature from author's domain -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 -0.2 DKIMWL_WL_HIGH DKIMwl.org - High trust sender X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Signed-off-by: Vineet Gupta --- arch/arc/kernel/entry.S | 6 ------ arch/arc/mm/tlb.c | 3 +++ 2 files changed, 3 insertions(+), 6 deletions(-) diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S index 2cb8dfe866b6..684efd094520 100644 --- a/arch/arc/kernel/entry.S +++ b/arch/arc/kernel/entry.S @@ -101,12 +101,6 @@ ENTRY(EV_MachineCheck) lr r0, [efa] mov r1, sp - ; hardware auto-disables MMU, re-enable it to allow kernel vaddr - ; access for say stack unwinding of modules for crash dumps - lr r3, [ARC_REG_PID] - or r3, r3, MMU_ENABLE - sr r3, [ARC_REG_PID] - lsr r3, r2, 8 bmsk r3, r3, 7 brne r3, ECR_C_MCHK_DUP_TLB, 1f diff --git a/arch/arc/mm/tlb.c b/arch/arc/mm/tlb.c index b68d5798327b..34f16e0b41e6 100644 --- a/arch/arc/mm/tlb.c +++ b/arch/arc/mm/tlb.c @@ -813,5 +813,8 @@ void do_tlb_overlap_fault(unsigned long cause, unsigned long address, } } + /* Re-enable MMU as hardware may have auto-disabled it upon exception */ + write_aux_reg(ARC_REG_PID, read_aux_reg(ARC_REG_PID) | MMU_ENABLE); + local_irq_restore(flags); }