From patchwork Tue Apr 14 15:34:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Rapoport X-Patchwork-Id: 11488371 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 791F9913 for ; Tue, 14 Apr 2020 15:36:10 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 3CD0C2085B for ; Tue, 14 Apr 2020 15:36:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="g8tX7R1x" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3CD0C2085B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 68AA48E0012; Tue, 14 Apr 2020 11:36:09 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 5EB5A8E0007; Tue, 14 Apr 2020 11:36:09 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4B2F28E0012; Tue, 14 Apr 2020 11:36:09 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0250.hostedemail.com [216.40.44.250]) by kanga.kvack.org (Postfix) with ESMTP id 2ED1D8E0007 for ; Tue, 14 Apr 2020 11:36:09 -0400 (EDT) Received: from smtpin25.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id E563A45B4 for ; Tue, 14 Apr 2020 15:36:08 +0000 (UTC) X-FDA: 76706861616.25.fall78_52b35784d743a X-Spam-Summary: 2,0,0,41f82ea4359332bb,d41d8cd98f00b204,rppt@kernel.org,,RULES_HIT:41:355:379:541:800:960:968:973:988:989:1260:1311:1314:1345:1359:1431:1437:1515:1535:1542:1711:1730:1747:1777:1792:1981:2194:2199:2393:2559:2562:3138:3139:3140:3141:3142:3353:3865:3866:3867:3868:3870:4321:4605:5007:6119:6261:6653:6742:6743:7576:10004:11026:11473:11657:11658:11914:12043:12296:12297:12438:12517:12519:12555:12663:12679:12895:12986:13894:14096:14181:14394:14721:21080:21324:21433:21451:21627:30003:30054,0,RBL:198.145.29.99:@kernel.org:.lbl8.mailshell.net-64.100.201.201 62.2.0.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:36,LUA_SUMMARY:none X-HE-Tag: fall78_52b35784d743a X-Filterd-Recvd-Size: 5381 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf09.hostedemail.com (Postfix) with ESMTP for ; Tue, 14 Apr 2020 15:36:08 +0000 (UTC) Received: from aquarius.haifa.ibm.com (nesher1.haifa.il.ibm.com [195.110.40.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4BB9220678; Tue, 14 Apr 2020 15:35:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586878567; bh=OkUMHeV6ia5DXa6r7XqF0EcDiCxeMDiKyETeOhmHuVk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g8tX7R1x8U/ypmylK2W4LDnRW6MuKA4OEuE/rqzE6DaYywwga3vLXpHEF3UVeO4Va FFCv5+sxV8WYkmXLLTJJ/Itrpb3pR20BFzXeYTGuZyIz7BkhLayzoPUZnRYGhPBI+/ 9dW/K6VSA3NvaHSUOdrqvqcGgofvXYqm4FLQQriE= From: Mike Rapoport To: Andrew Morton Cc: Arnd Bergmann , Benjamin Herrenschmidt , Brian Cain , Catalin Marinas , Christophe Leroy , Fenghua Yu , Geert Uytterhoeven , Guan Xuetao , James Morse , Jonas Bonn , Julien Thierry , Ley Foon Tan , Marc Zyngier , Michael Ellerman , Paul Mackerras , Rich Felker , Russell King , Stafford Horne , Stefan Kristiansson , Suzuki K Poulose , Tony Luck , Will Deacon , Yoshinori Sato , kvmarm@lists.cs.columbia.edu, kvm-ppc@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-sh@vger.kernel.org, nios2-dev@lists.rocketboards.org, openrisc@lists.librecores.org, uclinux-h8-devel@lists.sourceforge.jp, Mike Rapoport , Mike Rapoport Subject: [PATCH v4 06/14] nios2: add support for folded p4d page tables Date: Tue, 14 Apr 2020 18:34:47 +0300 Message-Id: <20200414153455.21744-7-rppt@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200414153455.21744-1-rppt@kernel.org> References: <20200414153455.21744-1-rppt@kernel.org> MIME-Version: 1.0 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Mike Rapoport Implement primitives necessary for the 4th level folding, add walks of p4d level where appropriate and remove usage of __ARCH_USE_5LEVEL_HACK. Signed-off-by: Mike Rapoport --- arch/nios2/include/asm/pgtable.h | 3 +-- arch/nios2/mm/fault.c | 9 +++++++-- arch/nios2/mm/ioremap.c | 6 +++++- 3 files changed, 13 insertions(+), 5 deletions(-) diff --git a/arch/nios2/include/asm/pgtable.h b/arch/nios2/include/asm/pgtable.h index f98b7f4519ba..47a1a3ea5734 100644 --- a/arch/nios2/include/asm/pgtable.h +++ b/arch/nios2/include/asm/pgtable.h @@ -22,7 +22,6 @@ #include #include -#define __ARCH_USE_5LEVEL_HACK #include #define FIRST_USER_ADDRESS 0UL @@ -100,7 +99,7 @@ extern pte_t invalid_pte_table[PAGE_SIZE/sizeof(pte_t)]; */ static inline void set_pmd(pmd_t *pmdptr, pmd_t pmdval) { - pmdptr->pud.pgd.pgd = pmdval.pud.pgd.pgd; + *pmdptr = pmdval; } /* to find an entry in a page-table-directory */ diff --git a/arch/nios2/mm/fault.c b/arch/nios2/mm/fault.c index ec9d8a9c426f..964eac1a21d0 100644 --- a/arch/nios2/mm/fault.c +++ b/arch/nios2/mm/fault.c @@ -242,6 +242,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long cause, */ int offset = pgd_index(address); pgd_t *pgd, *pgd_k; + p4d_t *p4d, *p4d_k; pud_t *pud, *pud_k; pmd_t *pmd, *pmd_k; pte_t *pte_k; @@ -253,8 +254,12 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long cause, goto no_context; set_pgd(pgd, *pgd_k); - pud = pud_offset(pgd, address); - pud_k = pud_offset(pgd_k, address); + p4d = p4d_offset(pgd, address); + p4d_k = p4d_offset(pgd_k, address); + if (!p4d_present(*p4d_k)) + goto no_context; + pud = pud_offset(p4d, address); + pud_k = pud_offset(p4d_k, address); if (!pud_present(*pud_k)) goto no_context; pmd = pmd_offset(pud, address); diff --git a/arch/nios2/mm/ioremap.c b/arch/nios2/mm/ioremap.c index 819bdfcc2e71..fe821efb9a99 100644 --- a/arch/nios2/mm/ioremap.c +++ b/arch/nios2/mm/ioremap.c @@ -86,11 +86,15 @@ static int remap_area_pages(unsigned long address, unsigned long phys_addr, if (address >= end) BUG(); do { + p4d_t *p4d; pud_t *pud; pmd_t *pmd; error = -ENOMEM; - pud = pud_alloc(&init_mm, dir, address); + p4d = p4d_alloc(&init_mm, dir, address); + if (!p4d) + break; + pud = pud_alloc(&init_mm, p4d, address); if (!pud) break; pmd = pmd_alloc(&init_mm, pud, address);