From patchwork Sat Apr 9 17:17:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 1615308 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4KbMQV6bN8z9sCq for ; Sun, 10 Apr 2022 03:23:14 +1000 (AEST) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4KbMQV5k8Wz3fFh for ; Sun, 10 Apr 2022 03:23:14 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=csgroup.eu (client-ip=93.17.235.10; helo=pegase2.c-s.fr; envelope-from=christophe.leroy@csgroup.eu; receiver=) Received: from pegase2.c-s.fr (pegase2.c-s.fr [93.17.235.10]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4KbMKg0vhSz3bky for ; Sun, 10 Apr 2022 03:19:02 +1000 (AEST) Received: from localhost (mailhub3.si.c-s.fr [172.26.127.67]) by localhost (Postfix) with ESMTP id 4KbMJx1gTQz9sTV; Sat, 9 Apr 2022 19:18:25 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from pegase2.c-s.fr ([172.26.127.65]) by localhost (pegase2.c-s.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Onhhv0E-bO6P; Sat, 9 Apr 2022 19:18:25 +0200 (CEST) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase2.c-s.fr (Postfix) with ESMTP id 4KbMJl6bphz9sTf; Sat, 9 Apr 2022 19:18:15 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id D7D7F8B76E; Sat, 9 Apr 2022 19:18:15 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id hcfUE2lB8wuj; Sat, 9 Apr 2022 19:18:15 +0200 (CEST) Received: from PO20335.IDSI0.si.c-s.fr (unknown [192.168.203.53]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 936048B79C; Sat, 9 Apr 2022 19:18:14 +0200 (CEST) Received: from PO20335.IDSI0.si.c-s.fr (localhost [127.0.0.1]) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.16.1) with ESMTPS id 239HI6a3833198 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Sat, 9 Apr 2022 19:18:06 +0200 Received: (from chleroy@localhost) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.17.1/Submit) id 239HI6kB833197; Sat, 9 Apr 2022 19:18:06 +0200 X-Authentication-Warning: PO20335.IDSI0.si.c-s.fr: chleroy set sender to christophe.leroy@csgroup.eu using -f From: Christophe Leroy To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , akpm@linux-foundation.org Subject: [PATCH v10 01/13] mm, hugetlbfs: Allow for "high" userspace addresses Date: Sat, 9 Apr 2022 19:17:25 +0200 Message-Id: <8b82565b407d04b6e6c4a564423a4e68bde6e39d.1649523076.git.christophe.leroy@csgroup.eu> X-Mailer: git-send-email 2.35.1 In-Reply-To: References: MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1649524639; l=5228; s=20211009; h=from:subject:message-id; bh=CCh2OX6N7Y1n5DdZLfyOCuZvZy71MVE8ItuPNEEWiA4=; b=4KPmkp+0oL7WG3iHYQB04+LR58xcFOyWVfRozKYxfHOYBdT42nVH07dEk/UmFWeVMovQQRvYSOdN GJ8VTZmWBy1RChBDWL0SgYritavpzzHezB5isAvfbzQdsU1pMShE X-Developer-Key: i=christophe.leroy@csgroup.eu; a=ed25519; pk=HIzTzUj91asvincQGOFx6+ZF5AoUuP9GdOtQChs7Mm0= X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Steve Capper , Catalin Marinas , Will Deacon , linux-kernel@vger.kernel.org, linux-mm@kvack.org, stable@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" This is a complement of f6795053dac8 ("mm: mmap: Allow for "high" userspace addresses") for hugetlb. This patch adds support for "high" userspace addresses that are optionally supported on the system and have to be requested via a hint mechanism ("high" addr parameter to mmap). Architectures such as powerpc and x86 achieve this by making changes to their architectural versions of hugetlb_get_unmapped_area() function. However, arm64 uses the generic version of that function. So take into account arch_get_mmap_base() and arch_get_mmap_end() in hugetlb_get_unmapped_area(). To allow that, move those two macros out of mm/mmap.c into include/linux/sched/mm.h If these macros are not defined in architectural code then they default to (TASK_SIZE) and (base) so should not introduce any behavioural changes to architectures that do not define them. For the time being, only ARM64 is affected by this change. From Catalin (ARM64): We should have fixed hugetlb_get_unmapped_area() as well when we added support for 52-bit VA. The reason for commit f6795053dac8 was to prevent normal mmap() from returning addresses above 48-bit by default as some user-space had hard assumptions about this. It's a slight ABI change if you do this for hugetlb_get_unmapped_area() but I doubt anyone would notice. It's more likely that the current behaviour would cause issues, so I'd rather have them consistent. Signed-off-by: Christophe Leroy Cc: Steve Capper Cc: Will Deacon Cc: Catalin Marinas Fixes: f6795053dac8 ("mm: mmap: Allow for "high" userspace addresses") Cc: # 5.0.x Reviewed-by: Catalin Marinas Acked-by: Andrew Morton --- v10: - Moved as first patch of the series so that it can be applied separately as a flag and be easily applied back on stable. - Added text from Catalin explaining why it is a fixup. --- fs/hugetlbfs/inode.c | 9 +++++---- include/linux/sched/mm.h | 8 ++++++++ mm/mmap.c | 8 -------- 3 files changed, 13 insertions(+), 12 deletions(-) diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index 99c7477cee5c..dd3a088db11d 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -206,7 +206,7 @@ hugetlb_get_unmapped_area_bottomup(struct file *file, unsigned long addr, info.flags = 0; info.length = len; info.low_limit = current->mm->mmap_base; - info.high_limit = TASK_SIZE; + info.high_limit = arch_get_mmap_end(addr); info.align_mask = PAGE_MASK & ~huge_page_mask(h); info.align_offset = 0; return vm_unmapped_area(&info); @@ -222,7 +222,7 @@ hugetlb_get_unmapped_area_topdown(struct file *file, unsigned long addr, info.flags = VM_UNMAPPED_AREA_TOPDOWN; info.length = len; info.low_limit = max(PAGE_SIZE, mmap_min_addr); - info.high_limit = current->mm->mmap_base; + info.high_limit = arch_get_mmap_base(addr, current->mm->mmap_base); info.align_mask = PAGE_MASK & ~huge_page_mask(h); info.align_offset = 0; addr = vm_unmapped_area(&info); @@ -237,7 +237,7 @@ hugetlb_get_unmapped_area_topdown(struct file *file, unsigned long addr, VM_BUG_ON(addr != -ENOMEM); info.flags = 0; info.low_limit = current->mm->mmap_base; - info.high_limit = TASK_SIZE; + info.high_limit = arch_get_mmap_end(addr); addr = vm_unmapped_area(&info); } @@ -251,6 +251,7 @@ hugetlb_get_unmapped_area(struct file *file, unsigned long addr, struct mm_struct *mm = current->mm; struct vm_area_struct *vma; struct hstate *h = hstate_file(file); + const unsigned long mmap_end = arch_get_mmap_end(addr); if (len & ~huge_page_mask(h)) return -EINVAL; @@ -266,7 +267,7 @@ hugetlb_get_unmapped_area(struct file *file, unsigned long addr, if (addr) { addr = ALIGN(addr, huge_page_size(h)); vma = find_vma(mm, addr); - if (TASK_SIZE - len >= addr && + if (mmap_end - len >= addr && (!vma || addr + len <= vm_start_gap(vma))) return addr; } diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h index a80356e9dc69..1ad1f4bfa025 100644 --- a/include/linux/sched/mm.h +++ b/include/linux/sched/mm.h @@ -136,6 +136,14 @@ static inline void mm_update_next_owner(struct mm_struct *mm) #endif /* CONFIG_MEMCG */ #ifdef CONFIG_MMU +#ifndef arch_get_mmap_end +#define arch_get_mmap_end(addr) (TASK_SIZE) +#endif + +#ifndef arch_get_mmap_base +#define arch_get_mmap_base(addr, base) (base) +#endif + extern void arch_pick_mmap_layout(struct mm_struct *mm, struct rlimit *rlim_stack); extern unsigned long diff --git a/mm/mmap.c b/mm/mmap.c index 3aa839f81e63..313b57d55a63 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2117,14 +2117,6 @@ unsigned long vm_unmapped_area(struct vm_unmapped_area_info *info) return addr; } -#ifndef arch_get_mmap_end -#define arch_get_mmap_end(addr) (TASK_SIZE) -#endif - -#ifndef arch_get_mmap_base -#define arch_get_mmap_base(addr, base) (base) -#endif - /* Get an address range which is currently unmapped. * For shmat() with addr=0. * From patchwork Sat Apr 9 17:17:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 1615306 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=112.213.38.117; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4KbMPc6q9Zz9sCq for ; 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Sat, 9 Apr 2022 19:18:06 +0200 X-Authentication-Warning: PO20335.IDSI0.si.c-s.fr: chleroy set sender to christophe.leroy@csgroup.eu using -f From: Christophe Leroy To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , akpm@linux-foundation.org Subject: [PATCH v10 02/13] mm: Allow arch specific arch_randomize_brk() with CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT Date: Sat, 9 Apr 2022 19:17:26 +0200 Message-Id: X-Mailer: git-send-email 2.35.1 In-Reply-To: References: MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1649524639; l=1149; s=20211009; h=from:subject:message-id; bh=In6hoVVyDKXseeO8Y+/7fZMHadvP9Y9sVPt1sEtc5qI=; b=OJwLbTVHE6myZeBP/aU0gFNnAj0YQv5RJhSJUvhA/YPNOJ89ILeINngwh/Q3KvtxMNC4cL2D4Bs7 NYu2MzZHBI+wBFLG3iRQ0HD2EcmCPv6rfjEOrxLLdzFgv+LYRRL6 X-Developer-Key: i=christophe.leroy@csgroup.eu; a=ed25519; pk=HIzTzUj91asvincQGOFx6+ZF5AoUuP9GdOtQChs7Mm0= X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Alexandre Ghiti Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Commit e7142bf5d231 ("arm64, mm: make randomization selected by generic topdown mmap layout") introduced a default version of arch_randomize_brk() provided when CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT is selected. powerpc could select CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT but needs to provide its own arch_randomize_brk(). In order to allow that, define generic version of arch_randomize_brk() as a __weak symbol. Cc: Alexandre Ghiti Signed-off-by: Christophe Leroy Acked-by: Andrew Morton --- mm/util.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/util.c b/mm/util.c index 54e5e761a9a9..0787fe4af4ac 100644 --- a/mm/util.c +++ b/mm/util.c @@ -344,7 +344,7 @@ unsigned long randomize_stack_top(unsigned long stack_top) } #ifdef CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT -unsigned long arch_randomize_brk(struct mm_struct *mm) +unsigned long __weak arch_randomize_brk(struct mm_struct *mm) { /* Is the current task 32bit ? */ if (!IS_ENABLED(CONFIG_64BIT) || is_compat_task()) From patchwork Sat Apr 9 17:17:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 1615309 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=112.213.38.117; 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Sat, 9 Apr 2022 19:18:14 +0200 (CEST) Received: from PO20335.IDSI0.si.c-s.fr (localhost [127.0.0.1]) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.16.1) with ESMTPS id 239HI74m833206 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Sat, 9 Apr 2022 19:18:07 +0200 Received: (from chleroy@localhost) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.17.1/Submit) id 239HI7np833205; Sat, 9 Apr 2022 19:18:07 +0200 X-Authentication-Warning: PO20335.IDSI0.si.c-s.fr: chleroy set sender to christophe.leroy@csgroup.eu using -f From: Christophe Leroy To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , akpm@linux-foundation.org Subject: [PATCH v10 03/13] mm, hugetlbfs: Allow an arch to always use generic versions of get_unmapped_area functions Date: Sat, 9 Apr 2022 19:17:27 +0200 Message-Id: <77f9d3e592f1c8511df9381aa1c4e754651da4d1.1649523076.git.christophe.leroy@csgroup.eu> X-Mailer: git-send-email 2.35.1 In-Reply-To: References: MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1649524639; l=6136; s=20211009; h=from:subject:message-id; bh=NZaDVf4M0k6hDw8GUmFYuvnFfio9E36LntDi58Rldps=; b=BLFIZTCd4vKNyZt24Ihd7MQsnHXd/K0p3tX06opWkS8Zu6ti/d0sxwkfzOq+QsQXaBDbQBMUrx1K R1nm+NQBAvTCVDjjqX8SeN3FsPYSOKa7okrCzW6drSZ/iUALlJhr X-Developer-Key: i=christophe.leroy@csgroup.eu; a=ed25519; pk=HIzTzUj91asvincQGOFx6+ZF5AoUuP9GdOtQChs7Mm0= X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Nicholas Piggin Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Unlike most architectures, powerpc can only define at runtime if it is going to use the generic arch_get_unmapped_area() or not. Today, powerpc has a copy of the generic arch_get_unmapped_area() because when selection HAVE_ARCH_UNMAPPED_AREA the generic arch_get_unmapped_area() is not available. Rename it generic_get_unmapped_area() and make it independent of HAVE_ARCH_UNMAPPED_AREA. Do the same for arch_get_unmapped_area_topdown() versus HAVE_ARCH_UNMAPPED_AREA_TOPDOWN. Do the same for hugetlb_get_unmapped_area() versus HAVE_ARCH_HUGETLB_UNMAPPED_AREA. Signed-off-by: Christophe Leroy Reviewed-by: Nicholas Piggin Acked-by: Andrew Morton --- fs/hugetlbfs/inode.c | 17 +++++++++++++---- include/linux/hugetlb.h | 5 +++++ include/linux/sched/mm.h | 9 +++++++++ mm/mmap.c | 31 ++++++++++++++++++++++++------- 4 files changed, 51 insertions(+), 11 deletions(-) diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index dd3a088db11d..ec611c7de9e3 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -195,7 +195,6 @@ static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma) * Called under mmap_write_lock(mm). */ -#ifndef HAVE_ARCH_HUGETLB_UNMAPPED_AREA static unsigned long hugetlb_get_unmapped_area_bottomup(struct file *file, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) @@ -244,9 +243,10 @@ hugetlb_get_unmapped_area_topdown(struct file *file, unsigned long addr, return addr; } -static unsigned long -hugetlb_get_unmapped_area(struct file *file, unsigned long addr, - unsigned long len, unsigned long pgoff, unsigned long flags) +unsigned long +generic_hugetlb_get_unmapped_area(struct file *file, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) { struct mm_struct *mm = current->mm; struct vm_area_struct *vma; @@ -283,6 +283,15 @@ hugetlb_get_unmapped_area(struct file *file, unsigned long addr, return hugetlb_get_unmapped_area_bottomup(file, addr, len, pgoff, flags); } + +#ifndef HAVE_ARCH_HUGETLB_UNMAPPED_AREA +static unsigned long +hugetlb_get_unmapped_area(struct file *file, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) +{ + return generic_hugetlb_get_unmapped_area(file, addr, len, pgoff, flags); +} #endif static size_t diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 53c1b6082a4c..10895adc7635 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -513,6 +513,11 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, unsigned long flags); #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ +unsigned long +generic_hugetlb_get_unmapped_area(struct file *file, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags); + /* * huegtlb page specific state flags. These flags are located in page.private * of the hugetlb head page. Functions created via the below macros should be diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h index 1ad1f4bfa025..da3a32d05b34 100644 --- a/include/linux/sched/mm.h +++ b/include/linux/sched/mm.h @@ -153,6 +153,15 @@ extern unsigned long arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags); + +unsigned long +generic_get_unmapped_area(struct file *filp, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags); +unsigned long +generic_get_unmapped_area_topdown(struct file *filp, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags); #else static inline void arch_pick_mmap_layout(struct mm_struct *mm, struct rlimit *rlim_stack) {} diff --git a/mm/mmap.c b/mm/mmap.c index 313b57d55a63..d2b6c3fbfb8c 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2128,10 +2128,10 @@ unsigned long vm_unmapped_area(struct vm_unmapped_area_info *info) * * This function "knows" that -ENOMEM has the bits set. */ -#ifndef HAVE_ARCH_UNMAPPED_AREA unsigned long -arch_get_unmapped_area(struct file *filp, unsigned long addr, - unsigned long len, unsigned long pgoff, unsigned long flags) +generic_get_unmapped_area(struct file *filp, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) { struct mm_struct *mm = current->mm; struct vm_area_struct *vma, *prev; @@ -2161,17 +2161,25 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr, info.align_offset = 0; return vm_unmapped_area(&info); } + +#ifndef HAVE_ARCH_UNMAPPED_AREA +unsigned long +arch_get_unmapped_area(struct file *filp, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) +{ + return generic_get_unmapped_area(filp, addr, len, pgoff, flags); +} #endif /* * This mmap-allocator allocates new areas top-down from below the * stack's low limit (the base): */ -#ifndef HAVE_ARCH_UNMAPPED_AREA_TOPDOWN unsigned long -arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr, - unsigned long len, unsigned long pgoff, - unsigned long flags) +generic_get_unmapped_area_topdown(struct file *filp, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) { struct vm_area_struct *vma, *prev; struct mm_struct *mm = current->mm; @@ -2219,6 +2227,15 @@ arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr, return addr; } + +#ifndef HAVE_ARCH_UNMAPPED_AREA_TOPDOWN +unsigned long +arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) +{ + return generic_get_unmapped_area_topdown(filp, addr, len, pgoff, flags); +} #endif unsigned long From patchwork Sat Apr 9 17:17:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 1615302 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=112.213.38.117; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4KbMMj0v9rz9sCq for ; 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Sat, 9 Apr 2022 19:18:07 +0200 X-Authentication-Warning: PO20335.IDSI0.si.c-s.fr: chleroy set sender to christophe.leroy@csgroup.eu using -f From: Christophe Leroy To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , akpm@linux-foundation.org Subject: [PATCH v10 04/13] mm: Add len and flags parameters to arch_get_mmap_end() Date: Sat, 9 Apr 2022 19:17:28 +0200 Message-Id: X-Mailer: git-send-email 2.35.1 In-Reply-To: References: MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1649524639; l=3998; s=20211009; h=from:subject:message-id; bh=3Bhxej7OCnv28c8lqtsHOrn0Gd/Xg0/Tq6nj5slIOu4=; b=3irWqdKhDGyXUJnpMBZ6Y7nCb5wEWgqEzKLo5XBVZgWsGQoKnjCy4wRFJsExnzyp2UD5OdpAQZQy Vp3JlPKNCyHmwButnVvAs0bC3g00uFCUb0/aX6wCHCJCarJuamD0 X-Developer-Key: i=christophe.leroy@csgroup.eu; a=ed25519; pk=HIzTzUj91asvincQGOFx6+ZF5AoUuP9GdOtQChs7Mm0= X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Will Deacon , Steve Capper , Catalin Marinas , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Powerpc needs flags and len to make decision on arch_get_mmap_end(). So add them as parameters to arch_get_mmap_end(). Signed-off-by: Christophe Leroy Cc: Steve Capper Cc: Catalin Marinas Cc: Will Deacon Acked-by: Catalin Marinas Acked-by: Andrew Morton --- arch/arm64/include/asm/processor.h | 4 ++-- fs/hugetlbfs/inode.c | 6 +++--- include/linux/sched/mm.h | 2 +- mm/mmap.c | 4 ++-- 4 files changed, 8 insertions(+), 8 deletions(-) diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h index 73e38d9a540c..bd22d94e844d 100644 --- a/arch/arm64/include/asm/processor.h +++ b/arch/arm64/include/asm/processor.h @@ -92,8 +92,8 @@ #endif /* CONFIG_COMPAT */ #ifndef CONFIG_ARM64_FORCE_52BIT -#define arch_get_mmap_end(addr) ((addr > DEFAULT_MAP_WINDOW) ? TASK_SIZE :\ - DEFAULT_MAP_WINDOW) +#define arch_get_mmap_end(addr, len, flags) \ + (((addr) > DEFAULT_MAP_WINDOW) ? TASK_SIZE : DEFAULT_MAP_WINDOW) #define arch_get_mmap_base(addr, base) ((addr > DEFAULT_MAP_WINDOW) ? \ base + TASK_SIZE - DEFAULT_MAP_WINDOW :\ diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index ec611c7de9e3..6f863497bd69 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -205,7 +205,7 @@ hugetlb_get_unmapped_area_bottomup(struct file *file, unsigned long addr, info.flags = 0; info.length = len; info.low_limit = current->mm->mmap_base; - info.high_limit = arch_get_mmap_end(addr); + info.high_limit = arch_get_mmap_end(addr, len, flags); info.align_mask = PAGE_MASK & ~huge_page_mask(h); info.align_offset = 0; return vm_unmapped_area(&info); @@ -236,7 +236,7 @@ hugetlb_get_unmapped_area_topdown(struct file *file, unsigned long addr, VM_BUG_ON(addr != -ENOMEM); info.flags = 0; info.low_limit = current->mm->mmap_base; - info.high_limit = arch_get_mmap_end(addr); + info.high_limit = arch_get_mmap_end(addr, len, flags); addr = vm_unmapped_area(&info); } @@ -251,7 +251,7 @@ generic_hugetlb_get_unmapped_area(struct file *file, unsigned long addr, struct mm_struct *mm = current->mm; struct vm_area_struct *vma; struct hstate *h = hstate_file(file); - const unsigned long mmap_end = arch_get_mmap_end(addr); + const unsigned long mmap_end = arch_get_mmap_end(addr, len, flags); if (len & ~huge_page_mask(h)) return -EINVAL; diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h index da3a32d05b34..8cd975a8bfeb 100644 --- a/include/linux/sched/mm.h +++ b/include/linux/sched/mm.h @@ -137,7 +137,7 @@ static inline void mm_update_next_owner(struct mm_struct *mm) #ifdef CONFIG_MMU #ifndef arch_get_mmap_end -#define arch_get_mmap_end(addr) (TASK_SIZE) +#define arch_get_mmap_end(addr, len, flags) (TASK_SIZE) #endif #ifndef arch_get_mmap_base diff --git a/mm/mmap.c b/mm/mmap.c index d2b6c3fbfb8c..e9b7d74e58bc 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2136,7 +2136,7 @@ generic_get_unmapped_area(struct file *filp, unsigned long addr, struct mm_struct *mm = current->mm; struct vm_area_struct *vma, *prev; struct vm_unmapped_area_info info; - const unsigned long mmap_end = arch_get_mmap_end(addr); + const unsigned long mmap_end = arch_get_mmap_end(addr, len, flags); if (len > mmap_end - mmap_min_addr) return -ENOMEM; @@ -2184,7 +2184,7 @@ generic_get_unmapped_area_topdown(struct file *filp, unsigned long addr, struct vm_area_struct *vma, *prev; struct mm_struct *mm = current->mm; struct vm_unmapped_area_info info; - const unsigned long mmap_end = arch_get_mmap_end(addr); + const unsigned long mmap_end = arch_get_mmap_end(addr, len, flags); /* requested length too big for entire address space */ if (len > mmap_end - mmap_min_addr) From patchwork Sat Apr 9 17:17:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 1615301 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=112.213.38.117; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; 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Sat, 9 Apr 2022 19:18:14 +0200 (CEST) Received: from PO20335.IDSI0.si.c-s.fr (localhost [127.0.0.1]) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.16.1) with ESMTPS id 239HI7YE833214 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Sat, 9 Apr 2022 19:18:07 +0200 Received: (from chleroy@localhost) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.17.1/Submit) id 239HI7XU833213; Sat, 9 Apr 2022 19:18:07 +0200 X-Authentication-Warning: PO20335.IDSI0.si.c-s.fr: chleroy set sender to christophe.leroy@csgroup.eu using -f From: Christophe Leroy To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , akpm@linux-foundation.org Subject: [PATCH v10 05/13] powerpc/mm: Move vma_mmu_pagesize() Date: Sat, 9 Apr 2022 19:17:29 +0200 Message-Id: <1302e000d529c93d07208f1fae90f938e7a551b4.1649523076.git.christophe.leroy@csgroup.eu> X-Mailer: git-send-email 2.35.1 In-Reply-To: References: MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1649524639; l=1793; s=20211009; h=from:subject:message-id; bh=bx8qaeX914dm/qgyDYd+w6J7NWMH8VOi7HP/6ov9wh8=; b=bbfm6Q4FTG4t1UJFIbhOg831/onZhxL2dVR5Ph6r2MHVentUFeGjusgBMmwJkS+D63kA7JWHfX2y Mx+kYC+3CZyRqGTz6+4W2OhUqqkyBvjLFKqLZ1d+19mNRC34HGmC X-Developer-Key: i=christophe.leroy@csgroup.eu; a=ed25519; pk=HIzTzUj91asvincQGOFx6+ZF5AoUuP9GdOtQChs7Mm0= X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Nicholas Piggin Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" vma_mmu_pagesize() is only required for slices, otherwise there is a generic weak version doing the exact same thing. Move it to slice.c Signed-off-by: Christophe Leroy Reviewed-by: Nicholas Piggin --- arch/powerpc/mm/hugetlbpage.c | 11 ----------- arch/powerpc/mm/slice.c | 9 +++++++++ 2 files changed, 9 insertions(+), 11 deletions(-) diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c index b642a5a8668f..7b89f0799d82 100644 --- a/arch/powerpc/mm/hugetlbpage.c +++ b/arch/powerpc/mm/hugetlbpage.c @@ -565,17 +565,6 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, } #endif -unsigned long vma_mmu_pagesize(struct vm_area_struct *vma) -{ - /* With radix we don't use slice, so derive it from vma*/ - if (IS_ENABLED(CONFIG_PPC_MM_SLICES) && !radix_enabled()) { - unsigned int psize = get_slice_psize(vma->vm_mm, vma->vm_start); - - return 1UL << mmu_psize_to_shift(psize); - } - return vma_kernel_pagesize(vma); -} - bool __init arch_hugetlb_valid_size(unsigned long size) { int shift = __ffs(size); diff --git a/arch/powerpc/mm/slice.c b/arch/powerpc/mm/slice.c index f42711f865f3..8a3ac062b71e 100644 --- a/arch/powerpc/mm/slice.c +++ b/arch/powerpc/mm/slice.c @@ -759,4 +759,13 @@ int slice_is_hugepage_only_range(struct mm_struct *mm, unsigned long addr, return !slice_check_range_fits(mm, maskp, addr, len); } + +unsigned long vma_mmu_pagesize(struct vm_area_struct *vma) +{ + /* With radix we don't use slice, so derive it from vma*/ + if (radix_enabled()) + return vma_kernel_pagesize(vma); + + return 1UL << mmu_psize_to_shift(get_slice_psize(vma->vm_mm, vma->vm_start)); +} #endif From patchwork Sat Apr 9 17:17:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 1615298 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (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 bilbo.ozlabs.org (Postfix) with ESMTPS id 4KbMK62FMvz9sCq for ; 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Sat, 9 Apr 2022 19:18:07 +0200 X-Authentication-Warning: PO20335.IDSI0.si.c-s.fr: chleroy set sender to christophe.leroy@csgroup.eu using -f From: Christophe Leroy To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , akpm@linux-foundation.org Subject: [PATCH v10 06/13] powerpc/mm: Make slice specific to book3s/64 Date: Sat, 9 Apr 2022 19:17:30 +0200 Message-Id: <4a0d74ef1966a5902b5fd4ac4b513a760a6d675a.1649523076.git.christophe.leroy@csgroup.eu> X-Mailer: git-send-email 2.35.1 In-Reply-To: References: MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1649524639; l=7647; s=20211009; h=from:subject:message-id; bh=j/j/xG7b+z/sfEpX5tyjExiFy1bhod9uj4UTTdJjUwk=; b=Ap8H4wrtMmIVzsTR2bz4mCNUuEn1AzQn8NLygFoytZK1bPVOn4cfEQ2vmm5E6nr5ybqT/upmHRdT 2BYzKcxRD5RxmEYIj0va0vXG/mU8yV3WowZ5tOQziHnG8oJiPc4o X-Developer-Key: i=christophe.leroy@csgroup.eu; a=ed25519; pk=HIzTzUj91asvincQGOFx6+ZF5AoUuP9GdOtQChs7Mm0= X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Nicholas Piggin Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Since commit 555904d07eef ("powerpc/8xx: MM_SLICE is not needed anymore") only book3s/64 selects CONFIG_PPC_MM_SLICES. Move slice.c into mm/book3s64/ Move necessary stuff in asm/book3s/64/slice.h and remove asm/slice.h Signed-off-by: Christophe Leroy Reviewed-by: Nicholas Piggin --- arch/powerpc/include/asm/book3s/64/mmu-hash.h | 1 + arch/powerpc/include/asm/book3s/64/slice.h | 18 ++++++++ arch/powerpc/include/asm/page.h | 1 - arch/powerpc/include/asm/slice.h | 46 ------------------- arch/powerpc/mm/Makefile | 1 - arch/powerpc/mm/book3s64/Makefile | 1 + arch/powerpc/mm/{ => book3s64}/slice.c | 2 - arch/powerpc/mm/nohash/mmu_context.c | 9 ---- arch/powerpc/mm/nohash/tlb.c | 4 -- 9 files changed, 20 insertions(+), 63 deletions(-) delete mode 100644 arch/powerpc/include/asm/slice.h rename arch/powerpc/mm/{ => book3s64}/slice.c (99%) diff --git a/arch/powerpc/include/asm/book3s/64/mmu-hash.h b/arch/powerpc/include/asm/book3s/64/mmu-hash.h index 21f780942911..1c4eebbc69c9 100644 --- a/arch/powerpc/include/asm/book3s/64/mmu-hash.h +++ b/arch/powerpc/include/asm/book3s/64/mmu-hash.h @@ -18,6 +18,7 @@ * complete pgtable.h but only a portion of it. */ #include +#include #include #include diff --git a/arch/powerpc/include/asm/book3s/64/slice.h b/arch/powerpc/include/asm/book3s/64/slice.h index f0d3194ba41b..5b0f7105bc8b 100644 --- a/arch/powerpc/include/asm/book3s/64/slice.h +++ b/arch/powerpc/include/asm/book3s/64/slice.h @@ -2,6 +2,8 @@ #ifndef _ASM_POWERPC_BOOK3S_64_SLICE_H #define _ASM_POWERPC_BOOK3S_64_SLICE_H +#ifndef __ASSEMBLY__ + #define SLICE_LOW_SHIFT 28 #define SLICE_LOW_TOP (0x100000000ul) #define SLICE_NUM_LOW (SLICE_LOW_TOP >> SLICE_LOW_SHIFT) @@ -13,4 +15,20 @@ #define SLB_ADDR_LIMIT_DEFAULT DEFAULT_MAP_WINDOW_USER64 +struct mm_struct; + +unsigned long slice_get_unmapped_area(unsigned long addr, unsigned long len, + unsigned long flags, unsigned int psize, + int topdown); + +unsigned int get_slice_psize(struct mm_struct *mm, unsigned long addr); + +void slice_set_range_psize(struct mm_struct *mm, unsigned long start, + unsigned long len, unsigned int psize); + +void slice_init_new_context_exec(struct mm_struct *mm); +void slice_setup_new_exec(void); + +#endif /* __ASSEMBLY__ */ + #endif /* _ASM_POWERPC_BOOK3S_64_SLICE_H */ diff --git a/arch/powerpc/include/asm/page.h b/arch/powerpc/include/asm/page.h index 254687258f42..62e0c6f12869 100644 --- a/arch/powerpc/include/asm/page.h +++ b/arch/powerpc/include/asm/page.h @@ -329,6 +329,5 @@ static inline unsigned long kaslr_offset(void) #include #endif /* __ASSEMBLY__ */ -#include #endif /* _ASM_POWERPC_PAGE_H */ diff --git a/arch/powerpc/include/asm/slice.h b/arch/powerpc/include/asm/slice.h deleted file mode 100644 index 0bdd9c62eca0..000000000000 --- a/arch/powerpc/include/asm/slice.h +++ /dev/null @@ -1,46 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _ASM_POWERPC_SLICE_H -#define _ASM_POWERPC_SLICE_H - -#ifdef CONFIG_PPC_BOOK3S_64 -#include -#endif - -#ifndef __ASSEMBLY__ - -struct mm_struct; - -#ifdef CONFIG_PPC_MM_SLICES - -#ifdef CONFIG_HUGETLB_PAGE -#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA -#endif -#define HAVE_ARCH_UNMAPPED_AREA -#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN - -unsigned long slice_get_unmapped_area(unsigned long addr, unsigned long len, - unsigned long flags, unsigned int psize, - int topdown); - -unsigned int get_slice_psize(struct mm_struct *mm, unsigned long addr); - -void slice_set_range_psize(struct mm_struct *mm, unsigned long start, - unsigned long len, unsigned int psize); - -void slice_init_new_context_exec(struct mm_struct *mm); -void slice_setup_new_exec(void); - -#else /* CONFIG_PPC_MM_SLICES */ - -static inline void slice_init_new_context_exec(struct mm_struct *mm) {} - -static inline unsigned int get_slice_psize(struct mm_struct *mm, unsigned long addr) -{ - return 0; -} - -#endif /* CONFIG_PPC_MM_SLICES */ - -#endif /* __ASSEMBLY__ */ - -#endif /* _ASM_POWERPC_SLICE_H */ diff --git a/arch/powerpc/mm/Makefile b/arch/powerpc/mm/Makefile index df8172da2301..d4c20484dad9 100644 --- a/arch/powerpc/mm/Makefile +++ b/arch/powerpc/mm/Makefile @@ -14,7 +14,6 @@ obj-$(CONFIG_PPC_MMU_NOHASH) += nohash/ obj-$(CONFIG_PPC_BOOK3S_32) += book3s32/ obj-$(CONFIG_PPC_BOOK3S_64) += book3s64/ obj-$(CONFIG_NUMA) += numa.o -obj-$(CONFIG_PPC_MM_SLICES) += slice.o obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o obj-$(CONFIG_NOT_COHERENT_CACHE) += dma-noncoherent.o obj-$(CONFIG_PPC_COPRO_BASE) += copro_fault.o diff --git a/arch/powerpc/mm/book3s64/Makefile b/arch/powerpc/mm/book3s64/Makefile index 2d50cac499c5..af2f3e75d458 100644 --- a/arch/powerpc/mm/book3s64/Makefile +++ b/arch/powerpc/mm/book3s64/Makefile @@ -21,6 +21,7 @@ obj-$(CONFIG_PPC_RADIX_MMU) += radix_hugetlbpage.o endif obj-$(CONFIG_SPAPR_TCE_IOMMU) += iommu_api.o obj-$(CONFIG_PPC_PKEY) += pkeys.o +obj-$(CONFIG_PPC_MM_SLICES) += slice.o # Instrumenting the SLB fault path can lead to duplicate SLB entries KCOV_INSTRUMENT_slb.o := n diff --git a/arch/powerpc/mm/slice.c b/arch/powerpc/mm/book3s64/slice.c similarity index 99% rename from arch/powerpc/mm/slice.c rename to arch/powerpc/mm/book3s64/slice.c index 8a3ac062b71e..e4382713746d 100644 --- a/arch/powerpc/mm/slice.c +++ b/arch/powerpc/mm/book3s64/slice.c @@ -692,7 +692,6 @@ void slice_init_new_context_exec(struct mm_struct *mm) bitmap_fill(mask->high_slices, SLICE_NUM_HIGH); } -#ifdef CONFIG_PPC_BOOK3S_64 void slice_setup_new_exec(void) { struct mm_struct *mm = current->mm; @@ -704,7 +703,6 @@ void slice_setup_new_exec(void) mm_ctx_set_slb_addr_limit(&mm->context, DEFAULT_MAP_WINDOW); } -#endif void slice_set_range_psize(struct mm_struct *mm, unsigned long start, unsigned long len, unsigned int psize) diff --git a/arch/powerpc/mm/nohash/mmu_context.c b/arch/powerpc/mm/nohash/mmu_context.c index 85b048f04c56..ccd5819b1bd9 100644 --- a/arch/powerpc/mm/nohash/mmu_context.c +++ b/arch/powerpc/mm/nohash/mmu_context.c @@ -317,15 +317,6 @@ void switch_mmu_context(struct mm_struct *prev, struct mm_struct *next, */ int init_new_context(struct task_struct *t, struct mm_struct *mm) { - /* - * We have MMU_NO_CONTEXT set to be ~0. Hence check - * explicitly against context.id == 0. This ensures that we properly - * initialize context slice details for newly allocated mm's (which will - * have id == 0) and don't alter context slice inherited via fork (which - * will have id != 0). - */ - if (mm->context.id == 0) - slice_init_new_context_exec(mm); mm->context.id = MMU_NO_CONTEXT; mm->context.active = 0; pte_frag_set(&mm->context, NULL); diff --git a/arch/powerpc/mm/nohash/tlb.c b/arch/powerpc/mm/nohash/tlb.c index fd2c77af5c55..7e1e7c3dc66a 100644 --- a/arch/powerpc/mm/nohash/tlb.c +++ b/arch/powerpc/mm/nohash/tlb.c @@ -773,9 +773,5 @@ void __init early_init_mmu(void) #ifdef CONFIG_PPC_47x early_init_mmu_47x(); #endif - -#ifdef CONFIG_PPC_MM_SLICES - mm_ctx_set_slb_addr_limit(&init_mm.context, SLB_ADDR_LIMIT_DEFAULT); -#endif } #endif /* CONFIG_PPC64 */ From patchwork Sat Apr 9 17:17:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 1615311 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; 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Sat, 9 Apr 2022 19:18:14 +0200 (CEST) Received: from PO20335.IDSI0.si.c-s.fr (localhost [127.0.0.1]) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.16.1) with ESMTPS id 239HI8mj833222 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Sat, 9 Apr 2022 19:18:08 +0200 Received: (from chleroy@localhost) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.17.1/Submit) id 239HI8Xu833221; Sat, 9 Apr 2022 19:18:08 +0200 X-Authentication-Warning: PO20335.IDSI0.si.c-s.fr: chleroy set sender to christophe.leroy@csgroup.eu using -f From: Christophe Leroy To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , akpm@linux-foundation.org Subject: [PATCH v10 07/13] powerpc/mm: Remove CONFIG_PPC_MM_SLICES Date: Sat, 9 Apr 2022 19:17:31 +0200 Message-Id: X-Mailer: git-send-email 2.35.1 In-Reply-To: References: MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1649524639; l=7009; s=20211009; h=from:subject:message-id; bh=OJfSjEsBiOjyk6mVJozRtYnW5x2UZjgwOqjqn13f90s=; b=rLnuEoae9MumFZF1nwFsMuzVwF6sRv1nCJyfRmdiWefSsAgXHTy0lzbvvfwbRn4bp0GLO/mmj+NP 69BGDW03A2ybqiDxvj86x3unULEEReX2z3Qgjav9v1pN41KtzgZB X-Developer-Key: i=christophe.leroy@csgroup.eu; a=ed25519; pk=HIzTzUj91asvincQGOFx6+ZF5AoUuP9GdOtQChs7Mm0= X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Nicholas Piggin Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" CONFIG_PPC_MM_SLICES is always selected by hash book3s/64. CONFIG_PPC_MM_SLICES is never selected by other platforms. Remove it. Signed-off-by: Christophe Leroy Reviewed-by: Nicholas Piggin --- arch/powerpc/include/asm/hugetlb.h | 2 +- arch/powerpc/include/asm/paca.h | 7 ------- arch/powerpc/kernel/paca.c | 5 ----- arch/powerpc/mm/book3s64/Makefile | 3 +-- arch/powerpc/mm/book3s64/hash_utils.c | 14 -------------- arch/powerpc/mm/hugetlbpage.c | 2 +- arch/powerpc/mm/mmap.c | 4 ++-- arch/powerpc/platforms/Kconfig.cputype | 4 ---- 8 files changed, 5 insertions(+), 36 deletions(-) diff --git a/arch/powerpc/include/asm/hugetlb.h b/arch/powerpc/include/asm/hugetlb.h index 6a1a1ac5743b..ef86197d1c0a 100644 --- a/arch/powerpc/include/asm/hugetlb.h +++ b/arch/powerpc/include/asm/hugetlb.h @@ -24,7 +24,7 @@ static inline int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr, unsigned long len) { - if (IS_ENABLED(CONFIG_PPC_MM_SLICES) && !radix_enabled()) + if (IS_ENABLED(CONFIG_PPC_64S_HASH_MMU) && !radix_enabled()) return slice_is_hugepage_only_range(mm, addr, len); return 0; } diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h index 8330968ca346..03330b7d835f 100644 --- a/arch/powerpc/include/asm/paca.h +++ b/arch/powerpc/include/asm/paca.h @@ -152,16 +152,9 @@ struct paca_struct { struct tlb_core_data tcd; #endif /* CONFIG_PPC_BOOK3E */ -#ifdef CONFIG_PPC_BOOK3S #ifdef CONFIG_PPC_64S_HASH_MMU -#ifdef CONFIG_PPC_MM_SLICES unsigned char mm_ctx_low_slices_psize[BITS_PER_LONG / BITS_PER_BYTE]; unsigned char mm_ctx_high_slices_psize[SLICE_ARRAY_SIZE]; -#else - u16 mm_ctx_user_psize; - u16 mm_ctx_sllp; -#endif -#endif #endif /* diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c index 39da688a9455..ba593fd60124 100644 --- a/arch/powerpc/kernel/paca.c +++ b/arch/powerpc/kernel/paca.c @@ -344,15 +344,10 @@ void copy_mm_to_paca(struct mm_struct *mm) { mm_context_t *context = &mm->context; -#ifdef CONFIG_PPC_MM_SLICES VM_BUG_ON(!mm_ctx_slb_addr_limit(context)); memcpy(&get_paca()->mm_ctx_low_slices_psize, mm_ctx_low_slices(context), LOW_SLICE_ARRAY_SZ); memcpy(&get_paca()->mm_ctx_high_slices_psize, mm_ctx_high_slices(context), TASK_SLICE_ARRAY_SZ(context)); -#else /* CONFIG_PPC_MM_SLICES */ - get_paca()->mm_ctx_user_psize = context->user_psize; - get_paca()->mm_ctx_sllp = context->sllp; -#endif } #endif /* CONFIG_PPC_64S_HASH_MMU */ diff --git a/arch/powerpc/mm/book3s64/Makefile b/arch/powerpc/mm/book3s64/Makefile index af2f3e75d458..d527dc8e30a8 100644 --- a/arch/powerpc/mm/book3s64/Makefile +++ b/arch/powerpc/mm/book3s64/Makefile @@ -5,7 +5,7 @@ ccflags-y := $(NO_MINIMAL_TOC) obj-y += mmu_context.o pgtable.o trace.o ifdef CONFIG_PPC_64S_HASH_MMU CFLAGS_REMOVE_slb.o = $(CC_FLAGS_FTRACE) -obj-y += hash_pgtable.o hash_utils.o hash_tlb.o slb.o +obj-y += hash_pgtable.o hash_utils.o hash_tlb.o slb.o slice.o obj-$(CONFIG_PPC_HASH_MMU_NATIVE) += hash_native.o obj-$(CONFIG_PPC_4K_PAGES) += hash_4k.o obj-$(CONFIG_PPC_64K_PAGES) += hash_64k.o @@ -21,7 +21,6 @@ obj-$(CONFIG_PPC_RADIX_MMU) += radix_hugetlbpage.o endif obj-$(CONFIG_SPAPR_TCE_IOMMU) += iommu_api.o obj-$(CONFIG_PPC_PKEY) += pkeys.o -obj-$(CONFIG_PPC_MM_SLICES) += slice.o # Instrumenting the SLB fault path can lead to duplicate SLB entries KCOV_INSTRUMENT_slb.o := n diff --git a/arch/powerpc/mm/book3s64/hash_utils.c b/arch/powerpc/mm/book3s64/hash_utils.c index 985cabdd7f67..43ecad8f9564 100644 --- a/arch/powerpc/mm/book3s64/hash_utils.c +++ b/arch/powerpc/mm/book3s64/hash_utils.c @@ -1264,7 +1264,6 @@ unsigned int hash_page_do_lazy_icache(unsigned int pp, pte_t pte, int trap) return pp; } -#ifdef CONFIG_PPC_MM_SLICES static unsigned int get_paca_psize(unsigned long addr) { unsigned char *psizes; @@ -1281,12 +1280,6 @@ static unsigned int get_paca_psize(unsigned long addr) return (psizes[index >> 1] >> (mask_index * 4)) & 0xF; } -#else -unsigned int get_paca_psize(unsigned long addr) -{ - return get_paca()->mm_ctx_user_psize; -} -#endif /* * Demote a segment to using 4k pages. @@ -1680,7 +1673,6 @@ DEFINE_INTERRUPT_HANDLER(do_hash_fault) } } -#ifdef CONFIG_PPC_MM_SLICES static bool should_hash_preload(struct mm_struct *mm, unsigned long ea) { int psize = get_slice_psize(mm, ea); @@ -1697,12 +1689,6 @@ static bool should_hash_preload(struct mm_struct *mm, unsigned long ea) return true; } -#else -static bool should_hash_preload(struct mm_struct *mm, unsigned long ea) -{ - return true; -} -#endif static void hash_preload(struct mm_struct *mm, pte_t *ptep, unsigned long ea, bool is_exec, unsigned long trap) diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c index 7b89f0799d82..f71ac14018e2 100644 --- a/arch/powerpc/mm/hugetlbpage.c +++ b/arch/powerpc/mm/hugetlbpage.c @@ -558,7 +558,7 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, return radix__hugetlb_get_unmapped_area(file, addr, len, pgoff, flags); #endif -#ifdef CONFIG_PPC_MM_SLICES +#ifdef CONFIG_PPC_64S_HASH_MMU return slice_get_unmapped_area(addr, len, flags, file_to_psize(file), 1); #endif BUG(); diff --git a/arch/powerpc/mm/mmap.c b/arch/powerpc/mm/mmap.c index c475cf810aa8..9b0d6e395bc0 100644 --- a/arch/powerpc/mm/mmap.c +++ b/arch/powerpc/mm/mmap.c @@ -190,7 +190,7 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long pgoff, unsigned long flags) { -#ifdef CONFIG_PPC_MM_SLICES +#ifdef CONFIG_PPC_64S_HASH_MMU return slice_get_unmapped_area(addr, len, flags, mm_ctx_user_psize(¤t->mm->context), 0); #else @@ -204,7 +204,7 @@ unsigned long arch_get_unmapped_area_topdown(struct file *filp, const unsigned long pgoff, const unsigned long flags) { -#ifdef CONFIG_PPC_MM_SLICES +#ifdef CONFIG_PPC_64S_HASH_MMU return slice_get_unmapped_area(addr0, len, flags, mm_ctx_user_psize(¤t->mm->context), 1); #else diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype index e2e1fec91c6e..9d099dc75e8b 100644 --- a/arch/powerpc/platforms/Kconfig.cputype +++ b/arch/powerpc/platforms/Kconfig.cputype @@ -377,7 +377,6 @@ config SPE config PPC_64S_HASH_MMU bool "Hash MMU Support" depends on PPC_BOOK3S_64 - select PPC_MM_SLICES default y help Enable support for the Power ISA Hash style MMU. This is implemented @@ -451,9 +450,6 @@ config PPC_BOOK3E_MMU def_bool y depends on FSL_BOOKE || PPC_BOOK3E -config PPC_MM_SLICES - bool - config PPC_HAVE_PMU_SUPPORT bool From patchwork Sat Apr 9 17:17:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 1615300 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=112.213.38.117; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 bilbo.ozlabs.org (Postfix) with ESMTPS id 4KbMLj1qHyz9sCq for ; Sun, 10 Apr 2022 03:19:57 +1000 (AEST) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4KbMLh51C5z3bYw for ; Sun, 10 Apr 2022 03:19:56 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=csgroup.eu (client-ip=93.17.235.10; helo=pegase2.c-s.fr; envelope-from=christophe.leroy@csgroup.eu; receiver=) Received: from pegase2.c-s.fr (pegase2.c-s.fr [93.17.235.10]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4KbMK20X3Qz3bcZ for ; Sun, 10 Apr 2022 03:18:29 +1000 (AEST) Received: from localhost (mailhub3.si.c-s.fr [172.26.127.67]) by localhost (Postfix) with ESMTP id 4KbMJn4BqYz9sTL; Sat, 9 Apr 2022 19:18:17 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from pegase2.c-s.fr ([172.26.127.65]) by localhost (pegase2.c-s.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 4CH_5kXfi46D; Sat, 9 Apr 2022 19:18:17 +0200 (CEST) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase2.c-s.fr (Postfix) with ESMTP id 4KbMJl2zsBz9sTS; Sat, 9 Apr 2022 19:18:15 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 543BA8B765; Sat, 9 Apr 2022 19:18:15 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id KNiw-433fELi; Sat, 9 Apr 2022 19:18:15 +0200 (CEST) Received: from PO20335.IDSI0.si.c-s.fr (unknown [192.168.203.53]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 9A42F8B7A0; Sat, 9 Apr 2022 19:18:14 +0200 (CEST) Received: from PO20335.IDSI0.si.c-s.fr (localhost [127.0.0.1]) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.16.1) with ESMTPS id 239HI8xQ833226 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Sat, 9 Apr 2022 19:18:08 +0200 Received: (from chleroy@localhost) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.17.1/Submit) id 239HI8XJ833225; Sat, 9 Apr 2022 19:18:08 +0200 X-Authentication-Warning: PO20335.IDSI0.si.c-s.fr: chleroy set sender to christophe.leroy@csgroup.eu using -f From: Christophe Leroy To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , akpm@linux-foundation.org Subject: [PATCH v10 08/13] powerpc/mm: Use generic_get_unmapped_area() and call it from arch_get_unmapped_area() Date: Sat, 9 Apr 2022 19:17:32 +0200 Message-Id: <393be1fa386446443682fdb74544d733f68ef3bb.1649523076.git.christophe.leroy@csgroup.eu> X-Mailer: git-send-email 2.35.1 In-Reply-To: References: MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1649524639; l=6626; s=20211009; h=from:subject:message-id; bh=C5sGSH3egToqQ7FLf2+Qr9/If/ytl82PjCY0W1x0g3A=; b=66vQAaLBgyE9ZS0Yw9eEbcGOKjjMQvGlhF3Du5oSWXkrLzEA7ypRnocKeDPV/J++F6G4FOPJx9tj SKMss6uoDUDnACLwonULaT2YTz5yQ+fECDDFofESbbPp+i1dGhYi X-Developer-Key: i=christophe.leroy@csgroup.eu; a=ed25519; pk=HIzTzUj91asvincQGOFx6+ZF5AoUuP9GdOtQChs7Mm0= X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Use the generic version of arch_get_unmapped_area() which is now available at all time instead of its copy radix__arch_get_unmapped_area() To allow that for PPC64, add arch_get_mmap_base() and arch_get_mmap_end() macros. Instead of setting mm->get_unmapped_area() to either arch_get_unmapped_area() or generic_get_unmapped_area(), always set it to arch_get_unmapped_area() and call generic_get_unmapped_area() from there when radix is enabled. Do the same with radix__arch_get_unmapped_area_topdown() Signed-off-by: Christophe Leroy --- arch/powerpc/include/asm/task_size_64.h | 8 ++ arch/powerpc/mm/mmap.c | 127 ++---------------------- 2 files changed, 14 insertions(+), 121 deletions(-) diff --git a/arch/powerpc/include/asm/task_size_64.h b/arch/powerpc/include/asm/task_size_64.h index 38fdf8041d12..5a709951c901 100644 --- a/arch/powerpc/include/asm/task_size_64.h +++ b/arch/powerpc/include/asm/task_size_64.h @@ -72,4 +72,12 @@ #define STACK_TOP_MAX TASK_SIZE_USER64 #define STACK_TOP (is_32bit_task() ? STACK_TOP_USER32 : STACK_TOP_USER64) +#define arch_get_mmap_base(addr, base) \ + (((addr) > DEFAULT_MAP_WINDOW) ? (base) + TASK_SIZE - DEFAULT_MAP_WINDOW : (base)) + +#define arch_get_mmap_end(addr, len, flags) \ + (((addr) > DEFAULT_MAP_WINDOW) || \ + (((flags) & MAP_FIXED) && ((addr) + (len) > DEFAULT_MAP_WINDOW)) ? TASK_SIZE : \ + DEFAULT_MAP_WINDOW) + #endif /* _ASM_POWERPC_TASK_SIZE_64_H */ diff --git a/arch/powerpc/mm/mmap.c b/arch/powerpc/mm/mmap.c index 9b0d6e395bc0..46781d0103d1 100644 --- a/arch/powerpc/mm/mmap.c +++ b/arch/powerpc/mm/mmap.c @@ -81,115 +81,15 @@ static inline unsigned long mmap_base(unsigned long rnd, } #ifdef HAVE_ARCH_UNMAPPED_AREA -#ifdef CONFIG_PPC_RADIX_MMU -/* - * Same function as generic code used only for radix, because we don't need to overload - * the generic one. But we will have to duplicate, because hash select - * HAVE_ARCH_UNMAPPED_AREA - */ -static unsigned long -radix__arch_get_unmapped_area(struct file *filp, unsigned long addr, - unsigned long len, unsigned long pgoff, - unsigned long flags) -{ - struct mm_struct *mm = current->mm; - struct vm_area_struct *vma; - int fixed = (flags & MAP_FIXED); - unsigned long high_limit; - struct vm_unmapped_area_info info; - - high_limit = DEFAULT_MAP_WINDOW; - if (addr >= high_limit || (fixed && (addr + len > high_limit))) - high_limit = TASK_SIZE; - - if (len > high_limit) - return -ENOMEM; - - if (fixed) { - if (addr > high_limit - len) - return -ENOMEM; - return addr; - } - - if (addr) { - addr = PAGE_ALIGN(addr); - vma = find_vma(mm, addr); - if (high_limit - len >= addr && addr >= mmap_min_addr && - (!vma || addr + len <= vm_start_gap(vma))) - return addr; - } - - info.flags = 0; - info.length = len; - info.low_limit = mm->mmap_base; - info.high_limit = high_limit; - info.align_mask = 0; - - return vm_unmapped_area(&info); -} - -static unsigned long -radix__arch_get_unmapped_area_topdown(struct file *filp, - const unsigned long addr0, - const unsigned long len, - const unsigned long pgoff, - const unsigned long flags) -{ - struct vm_area_struct *vma; - struct mm_struct *mm = current->mm; - unsigned long addr = addr0; - int fixed = (flags & MAP_FIXED); - unsigned long high_limit; - struct vm_unmapped_area_info info; - - high_limit = DEFAULT_MAP_WINDOW; - if (addr >= high_limit || (fixed && (addr + len > high_limit))) - high_limit = TASK_SIZE; - - if (len > high_limit) - return -ENOMEM; - - if (fixed) { - if (addr > high_limit - len) - return -ENOMEM; - return addr; - } - - if (addr) { - addr = PAGE_ALIGN(addr); - vma = find_vma(mm, addr); - if (high_limit - len >= addr && addr >= mmap_min_addr && - (!vma || addr + len <= vm_start_gap(vma))) - return addr; - } - - info.flags = VM_UNMAPPED_AREA_TOPDOWN; - info.length = len; - info.low_limit = max(PAGE_SIZE, mmap_min_addr); - info.high_limit = mm->mmap_base + (high_limit - DEFAULT_MAP_WINDOW); - info.align_mask = 0; - - addr = vm_unmapped_area(&info); - if (!(addr & ~PAGE_MASK)) - return addr; - VM_BUG_ON(addr != -ENOMEM); - - /* - * A failed mmap() very likely causes application failure, - * so fall back to the bottom-up function here. This scenario - * can happen with large stack limits and large mmap() - * allocations. - */ - return radix__arch_get_unmapped_area(filp, addr0, len, pgoff, flags); -} -#endif - unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) { + if (radix_enabled()) + return generic_get_unmapped_area(filp, addr, len, pgoff, flags); + #ifdef CONFIG_PPC_64S_HASH_MMU return slice_get_unmapped_area(addr, len, flags, mm_ctx_user_psize(¤t->mm->context), 0); @@ -204,6 +104,9 @@ unsigned long arch_get_unmapped_area_topdown(struct file *filp, const unsigned long pgoff, const unsigned long flags) { + if (radix_enabled()) + return generic_get_unmapped_area_topdown(filp, addr0, len, pgoff, flags); + #ifdef CONFIG_PPC_64S_HASH_MMU return slice_get_unmapped_area(addr0, len, flags, mm_ctx_user_psize(¤t->mm->context), 1); @@ -213,21 +116,6 @@ unsigned long arch_get_unmapped_area_topdown(struct file *filp, } #endif /* HAVE_ARCH_UNMAPPED_AREA */ -static void radix__arch_pick_mmap_layout(struct mm_struct *mm, - unsigned long random_factor, - struct rlimit *rlim_stack) -{ -#ifdef CONFIG_PPC_RADIX_MMU - if (mmap_is_legacy(rlim_stack)) { - mm->mmap_base = TASK_UNMAPPED_BASE; - mm->get_unmapped_area = radix__arch_get_unmapped_area; - } else { - mm->mmap_base = mmap_base(random_factor, rlim_stack); - mm->get_unmapped_area = radix__arch_get_unmapped_area_topdown; - } -#endif -} - /* * This function, called very early during the creation of a new * process VM image, sets up which VM layout function to use: @@ -239,9 +127,6 @@ void arch_pick_mmap_layout(struct mm_struct *mm, struct rlimit *rlim_stack) if (current->flags & PF_RANDOMIZE) random_factor = arch_mmap_rnd(); - if (radix_enabled()) - return radix__arch_pick_mmap_layout(mm, random_factor, - rlim_stack); /* * Fall back to the standard layout if the personality * bit is set, or if the expected stack growth is unlimited: From patchwork Sat Apr 9 17:17:33 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 1615304 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; 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Sat, 9 Apr 2022 19:18:15 +0200 (CEST) Received: from PO20335.IDSI0.si.c-s.fr (unknown [192.168.203.53]) by messagerie.si.c-s.fr (Postfix) with ESMTP id AA80B8B7AA; Sat, 9 Apr 2022 19:18:14 +0200 (CEST) Received: from PO20335.IDSI0.si.c-s.fr (localhost [127.0.0.1]) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.16.1) with ESMTPS id 239HI84R833230 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Sat, 9 Apr 2022 19:18:08 +0200 Received: (from chleroy@localhost) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.17.1/Submit) id 239HI88l833229; Sat, 9 Apr 2022 19:18:08 +0200 X-Authentication-Warning: PO20335.IDSI0.si.c-s.fr: chleroy set sender to christophe.leroy@csgroup.eu using -f From: Christophe Leroy To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , akpm@linux-foundation.org Subject: [PATCH v10 09/13] powerpc/mm: Use generic_hugetlb_get_unmapped_area() Date: Sat, 9 Apr 2022 19:17:33 +0200 Message-Id: <05f77014c619061638ecc52a0a4136eb04cc2799.1649523076.git.christophe.leroy@csgroup.eu> X-Mailer: git-send-email 2.35.1 In-Reply-To: References: MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1649524639; l=4049; s=20211009; h=from:subject:message-id; bh=koj4XG3IQ1J0I1gOO/UTrhx5DgiQqHDLrh3ic8nyM08=; b=t+ArvbuNay7Z6D8+Xk+9TTLbve3kcD+v9o24U41L/74yLSXNsF2xUFl1JDlniejT33HrNRSmYLW+ c9+kPyVlD/2KFdFYE2J0Mpvb1+fYCWXAbMmkUNFQs7esCnw4g7+I X-Developer-Key: i=christophe.leroy@csgroup.eu; a=ed25519; pk=HIzTzUj91asvincQGOFx6+ZF5AoUuP9GdOtQChs7Mm0= X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Use the generic version of arch_hugetlb_get_unmapped_area() which is now available at all time. Signed-off-by: Christophe Leroy --- arch/powerpc/include/asm/book3s/64/hugetlb.h | 4 -- arch/powerpc/mm/book3s64/radix_hugetlbpage.c | 55 -------------------- arch/powerpc/mm/hugetlbpage.c | 4 +- 3 files changed, 1 insertion(+), 62 deletions(-) diff --git a/arch/powerpc/include/asm/book3s/64/hugetlb.h b/arch/powerpc/include/asm/book3s/64/hugetlb.h index 12e150e615b7..b37a28f62cf6 100644 --- a/arch/powerpc/include/asm/book3s/64/hugetlb.h +++ b/arch/powerpc/include/asm/book3s/64/hugetlb.h @@ -8,10 +8,6 @@ */ void radix__flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr); void radix__local_flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr); -extern unsigned long -radix__hugetlb_get_unmapped_area(struct file *file, unsigned long addr, - unsigned long len, unsigned long pgoff, - unsigned long flags); extern void radix__huge_ptep_modify_prot_commit(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep, diff --git a/arch/powerpc/mm/book3s64/radix_hugetlbpage.c b/arch/powerpc/mm/book3s64/radix_hugetlbpage.c index 23d3e08911d3..d2fb776febb4 100644 --- a/arch/powerpc/mm/book3s64/radix_hugetlbpage.c +++ b/arch/powerpc/mm/book3s64/radix_hugetlbpage.c @@ -41,61 +41,6 @@ void radix__flush_hugetlb_tlb_range(struct vm_area_struct *vma, unsigned long st radix__flush_tlb_range_psize(vma->vm_mm, start, end, psize); } -/* - * A vairant of hugetlb_get_unmapped_area doing topdown search - * FIXME!! should we do as x86 does or non hugetlb area does ? - * ie, use topdown or not based on mmap_is_legacy check ? - */ -unsigned long -radix__hugetlb_get_unmapped_area(struct file *file, unsigned long addr, - unsigned long len, unsigned long pgoff, - unsigned long flags) -{ - struct mm_struct *mm = current->mm; - struct vm_area_struct *vma; - struct hstate *h = hstate_file(file); - int fixed = (flags & MAP_FIXED); - unsigned long high_limit; - struct vm_unmapped_area_info info; - - high_limit = DEFAULT_MAP_WINDOW; - if (addr >= high_limit || (fixed && (addr + len > high_limit))) - high_limit = TASK_SIZE; - - if (len & ~huge_page_mask(h)) - return -EINVAL; - if (len > high_limit) - return -ENOMEM; - - if (fixed) { - if (addr > high_limit - len) - return -ENOMEM; - if (prepare_hugepage_range(file, addr, len)) - return -EINVAL; - return addr; - } - - if (addr) { - addr = ALIGN(addr, huge_page_size(h)); - vma = find_vma(mm, addr); - if (high_limit - len >= addr && addr >= mmap_min_addr && - (!vma || addr + len <= vm_start_gap(vma))) - return addr; - } - /* - * We are always doing an topdown search here. Slice code - * does that too. - */ - info.flags = VM_UNMAPPED_AREA_TOPDOWN; - info.length = len; - info.low_limit = max(PAGE_SIZE, mmap_min_addr); - info.high_limit = mm->mmap_base + (high_limit - DEFAULT_MAP_WINDOW); - info.align_mask = PAGE_MASK & ~huge_page_mask(h); - info.align_offset = 0; - - return vm_unmapped_area(&info); -} - void radix__huge_ptep_modify_prot_commit(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep, pte_t old_pte, pte_t pte) diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c index f71ac14018e2..a87c886042e9 100644 --- a/arch/powerpc/mm/hugetlbpage.c +++ b/arch/powerpc/mm/hugetlbpage.c @@ -553,11 +553,9 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) { -#ifdef CONFIG_PPC_RADIX_MMU if (radix_enabled()) - return radix__hugetlb_get_unmapped_area(file, addr, len, + return generic_hugetlb_get_unmapped_area(file, addr, len, pgoff, flags); -#endif #ifdef CONFIG_PPC_64S_HASH_MMU return slice_get_unmapped_area(addr, len, flags, file_to_psize(file), 1); #endif From patchwork Sat Apr 9 17:17:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 1615299 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4KbML64hMxz9sCq for ; Sun, 10 Apr 2022 03:19:26 +1000 (AEST) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4KbML63WXQz3cDD for ; 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Sat, 9 Apr 2022 19:18:15 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 2A4B98B7B2; Sat, 9 Apr 2022 19:18:15 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id vwxT8YLSkEaz; Sat, 9 Apr 2022 19:18:15 +0200 (CEST) Received: from PO20335.IDSI0.si.c-s.fr (unknown [192.168.203.53]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 8CEBF8B76D; Sat, 9 Apr 2022 19:18:14 +0200 (CEST) Received: from PO20335.IDSI0.si.c-s.fr (localhost [127.0.0.1]) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.16.1) with ESMTPS id 239HI8Og833234 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Sat, 9 Apr 2022 19:18:08 +0200 Received: (from chleroy@localhost) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.17.1/Submit) id 239HI8Tm833233; Sat, 9 Apr 2022 19:18:08 +0200 X-Authentication-Warning: PO20335.IDSI0.si.c-s.fr: chleroy set sender to christophe.leroy@csgroup.eu using -f From: Christophe Leroy To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , akpm@linux-foundation.org Subject: [PATCH v10 10/13] powerpc/mm: Move get_unmapped_area functions to slice.c Date: Sat, 9 Apr 2022 19:17:34 +0200 Message-Id: X-Mailer: git-send-email 2.35.1 In-Reply-To: References: MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1649524639; l=6292; s=20211009; h=from:subject:message-id; bh=GNbp5xijNIjE9M1NEJcAoQkRnaMkAGNfjUpY+cACkcE=; b=3Nj/mEwO9I/v/NKpxdokCcuvat79piwACve2fvqfBUGFf6YiDZaVmPgkD+zRLQW3no888PHOGgCy b4NVmt09AzpCS+IQ60xbeFV6E/gcMhd93hS+f/lrYi5grFA4KVBQ X-Developer-Key: i=christophe.leroy@csgroup.eu; a=ed25519; pk=HIzTzUj91asvincQGOFx6+ZF5AoUuP9GdOtQChs7Mm0= X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" hugetlb_get_unmapped_area() is now identical to the generic version if only RADIX is enabled, so move it to slice.c and let it fallback on the generic one when HASH MMU is not compiled in. Do the same with arch_get_unmapped_area() and arch_get_unmapped_area_topdown(). Signed-off-by: Christophe Leroy --- arch/powerpc/include/asm/book3s/64/mmu.h | 6 ---- arch/powerpc/include/asm/book3s/64/slice.h | 6 ++++ arch/powerpc/mm/book3s64/slice.c | 42 ++++++++++++++++++++++ arch/powerpc/mm/hugetlbpage.c | 21 ----------- arch/powerpc/mm/mmap.c | 36 ------------------- 5 files changed, 48 insertions(+), 63 deletions(-) diff --git a/arch/powerpc/include/asm/book3s/64/mmu.h b/arch/powerpc/include/asm/book3s/64/mmu.h index 006cbec70ffe..570a4960cf17 100644 --- a/arch/powerpc/include/asm/book3s/64/mmu.h +++ b/arch/powerpc/include/asm/book3s/64/mmu.h @@ -4,12 +4,6 @@ #include -#ifdef CONFIG_HUGETLB_PAGE -#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA -#endif -#define HAVE_ARCH_UNMAPPED_AREA -#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN - #ifndef __ASSEMBLY__ /* * Page size definition diff --git a/arch/powerpc/include/asm/book3s/64/slice.h b/arch/powerpc/include/asm/book3s/64/slice.h index 5b0f7105bc8b..b8eb4ad271b9 100644 --- a/arch/powerpc/include/asm/book3s/64/slice.h +++ b/arch/powerpc/include/asm/book3s/64/slice.h @@ -4,6 +4,12 @@ #ifndef __ASSEMBLY__ +#ifdef CONFIG_HUGETLB_PAGE +#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA +#endif +#define HAVE_ARCH_UNMAPPED_AREA +#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN + #define SLICE_LOW_SHIFT 28 #define SLICE_LOW_TOP (0x100000000ul) #define SLICE_NUM_LOW (SLICE_LOW_TOP >> SLICE_LOW_SHIFT) diff --git a/arch/powerpc/mm/book3s64/slice.c b/arch/powerpc/mm/book3s64/slice.c index e4382713746d..03681042b807 100644 --- a/arch/powerpc/mm/book3s64/slice.c +++ b/arch/powerpc/mm/book3s64/slice.c @@ -639,6 +639,32 @@ unsigned long slice_get_unmapped_area(unsigned long addr, unsigned long len, } EXPORT_SYMBOL_GPL(slice_get_unmapped_area); +unsigned long arch_get_unmapped_area(struct file *filp, + unsigned long addr, + unsigned long len, + unsigned long pgoff, + unsigned long flags) +{ + if (radix_enabled()) + return generic_get_unmapped_area(filp, addr, len, pgoff, flags); + + return slice_get_unmapped_area(addr, len, flags, + mm_ctx_user_psize(¤t->mm->context), 0); +} + +unsigned long arch_get_unmapped_area_topdown(struct file *filp, + const unsigned long addr0, + const unsigned long len, + const unsigned long pgoff, + const unsigned long flags) +{ + if (radix_enabled()) + return generic_get_unmapped_area_topdown(filp, addr0, len, pgoff, flags); + + return slice_get_unmapped_area(addr0, len, flags, + mm_ctx_user_psize(¤t->mm->context), 1); +} + unsigned int notrace get_slice_psize(struct mm_struct *mm, unsigned long addr) { unsigned char *psizes; @@ -766,4 +792,20 @@ unsigned long vma_mmu_pagesize(struct vm_area_struct *vma) return 1UL << mmu_psize_to_shift(get_slice_psize(vma->vm_mm, vma->vm_start)); } + +static int file_to_psize(struct file *file) +{ + struct hstate *hstate = hstate_file(file); + return shift_to_mmu_psize(huge_page_shift(hstate)); +} + +unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) +{ + if (radix_enabled()) + return generic_hugetlb_get_unmapped_area(file, addr, len, pgoff, flags); + + return slice_get_unmapped_area(addr, len, flags, file_to_psize(file), 1); +} #endif diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c index a87c886042e9..b282af39fcf6 100644 --- a/arch/powerpc/mm/hugetlbpage.c +++ b/arch/powerpc/mm/hugetlbpage.c @@ -542,27 +542,6 @@ struct page *follow_huge_pd(struct vm_area_struct *vma, return page; } -#ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA -static inline int file_to_psize(struct file *file) -{ - struct hstate *hstate = hstate_file(file); - return shift_to_mmu_psize(huge_page_shift(hstate)); -} - -unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, - unsigned long len, unsigned long pgoff, - unsigned long flags) -{ - if (radix_enabled()) - return generic_hugetlb_get_unmapped_area(file, addr, len, - pgoff, flags); -#ifdef CONFIG_PPC_64S_HASH_MMU - return slice_get_unmapped_area(addr, len, flags, file_to_psize(file), 1); -#endif - BUG(); -} -#endif - bool __init arch_hugetlb_valid_size(unsigned long size) { int shift = __ffs(size); diff --git a/arch/powerpc/mm/mmap.c b/arch/powerpc/mm/mmap.c index 46781d0103d1..5972d619d274 100644 --- a/arch/powerpc/mm/mmap.c +++ b/arch/powerpc/mm/mmap.c @@ -80,42 +80,6 @@ static inline unsigned long mmap_base(unsigned long rnd, return PAGE_ALIGN(DEFAULT_MAP_WINDOW - gap - rnd); } -#ifdef HAVE_ARCH_UNMAPPED_AREA -unsigned long arch_get_unmapped_area(struct file *filp, - unsigned long addr, - unsigned long len, - unsigned long pgoff, - unsigned long flags) -{ - if (radix_enabled()) - return generic_get_unmapped_area(filp, addr, len, pgoff, flags); - -#ifdef CONFIG_PPC_64S_HASH_MMU - return slice_get_unmapped_area(addr, len, flags, - mm_ctx_user_psize(¤t->mm->context), 0); -#else - BUG(); -#endif -} - -unsigned long arch_get_unmapped_area_topdown(struct file *filp, - const unsigned long addr0, - const unsigned long len, - const unsigned long pgoff, - const unsigned long flags) -{ - if (radix_enabled()) - return generic_get_unmapped_area_topdown(filp, addr0, len, pgoff, flags); - -#ifdef CONFIG_PPC_64S_HASH_MMU - return slice_get_unmapped_area(addr0, len, flags, - mm_ctx_user_psize(¤t->mm->context), 1); -#else - BUG(); -#endif -} -#endif /* HAVE_ARCH_UNMAPPED_AREA */ - /* * This function, called very early during the creation of a new * process VM image, sets up which VM layout function to use: From patchwork Sat Apr 9 17:17:35 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 1615303 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=112.213.38.117; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4KbMN816SLz9sCq for ; 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Sat, 9 Apr 2022 19:18:08 +0200 X-Authentication-Warning: PO20335.IDSI0.si.c-s.fr: chleroy set sender to christophe.leroy@csgroup.eu using -f From: Christophe Leroy To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , akpm@linux-foundation.org Subject: [PATCH v10 11/13] powerpc/mm: Enable full randomisation of memory mappings Date: Sat, 9 Apr 2022 19:17:35 +0200 Message-Id: <417fb10dde828534c73a03138b49621d74f4e5be.1649523076.git.christophe.leroy@csgroup.eu> X-Mailer: git-send-email 2.35.1 In-Reply-To: References: MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1649524639; l=4354; s=20211009; h=from:subject:message-id; bh=1BY/B7ndaWoYrR9FdC7vk/xdt/SoueffBXNGnXIdLlM=; b=4l3xkGKzNKcOljOX4n7As37CYVgs+L+aOdeQKcXfXKPfJQZd33V9toxmIp1r55aOfRNXfk6T6AYF nuxt5ZNDBgNjsLgbfHY3XuFmNtv1ct+xK9A4QHDGAZjuKLwrBynB X-Developer-Key: i=christophe.leroy@csgroup.eu; a=ed25519; pk=HIzTzUj91asvincQGOFx6+ZF5AoUuP9GdOtQChs7Mm0= X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Do like most other architectures and provide randomisation also to "legacy" memory mappings, by adding the random factor to mm->mmap_base in arch_pick_mmap_layout(). See commit 8b8addf891de ("x86/mm/32: Enable full randomization on i386 and X86_32") for all explanations and benefits of that mmap randomisation. At the moment, slice_find_area_bottomup() doesn't use mm->mmap_base but uses the fixed TASK_UNMAPPED_BASE instead. slice_find_area_bottomup() being used as a fallback to slice_find_area_topdown(), it can't use mm->mmap_base directly. Instead of always using TASK_UNMAPPED_BASE as base address, leave it to the caller. When called from slice_find_area_topdown() TASK_UNMAPPED_BASE is used. Otherwise mm->mmap_base is used. Signed-off-by: Christophe Leroy --- arch/powerpc/mm/book3s64/slice.c | 18 +++++++----------- arch/powerpc/mm/mmap.c | 2 +- 2 files changed, 8 insertions(+), 12 deletions(-) diff --git a/arch/powerpc/mm/book3s64/slice.c b/arch/powerpc/mm/book3s64/slice.c index 03681042b807..c0b58afb9a47 100644 --- a/arch/powerpc/mm/book3s64/slice.c +++ b/arch/powerpc/mm/book3s64/slice.c @@ -276,20 +276,18 @@ static bool slice_scan_available(unsigned long addr, } static unsigned long slice_find_area_bottomup(struct mm_struct *mm, - unsigned long len, + unsigned long addr, unsigned long len, const struct slice_mask *available, int psize, unsigned long high_limit) { int pshift = max_t(int, mmu_psize_defs[psize].shift, PAGE_SHIFT); - unsigned long addr, found, next_end; + unsigned long found, next_end; struct vm_unmapped_area_info info; info.flags = 0; info.length = len; info.align_mask = PAGE_MASK & ((1ul << pshift) - 1); info.align_offset = 0; - - addr = TASK_UNMAPPED_BASE; /* * Check till the allow max value for this mmap request */ @@ -322,12 +320,12 @@ static unsigned long slice_find_area_bottomup(struct mm_struct *mm, } static unsigned long slice_find_area_topdown(struct mm_struct *mm, - unsigned long len, + unsigned long addr, unsigned long len, const struct slice_mask *available, int psize, unsigned long high_limit) { int pshift = max_t(int, mmu_psize_defs[psize].shift, PAGE_SHIFT); - unsigned long addr, found, prev; + unsigned long found, prev; struct vm_unmapped_area_info info; unsigned long min_addr = max(PAGE_SIZE, mmap_min_addr); @@ -335,8 +333,6 @@ static unsigned long slice_find_area_topdown(struct mm_struct *mm, info.length = len; info.align_mask = PAGE_MASK & ((1ul << pshift) - 1); info.align_offset = 0; - - addr = mm->mmap_base; /* * If we are trying to allocate above DEFAULT_MAP_WINDOW * Add the different to the mmap_base. @@ -377,7 +373,7 @@ static unsigned long slice_find_area_topdown(struct mm_struct *mm, * can happen with large stack limits and large mmap() * allocations. */ - return slice_find_area_bottomup(mm, len, available, psize, high_limit); + return slice_find_area_bottomup(mm, TASK_UNMAPPED_BASE, len, available, psize, high_limit); } @@ -386,9 +382,9 @@ static unsigned long slice_find_area(struct mm_struct *mm, unsigned long len, int topdown, unsigned long high_limit) { if (topdown) - return slice_find_area_topdown(mm, len, mask, psize, high_limit); + return slice_find_area_topdown(mm, mm->mmap_base, len, mask, psize, high_limit); else - return slice_find_area_bottomup(mm, len, mask, psize, high_limit); + return slice_find_area_bottomup(mm, mm->mmap_base, len, mask, psize, high_limit); } static inline void slice_copy_mask(struct slice_mask *dst, diff --git a/arch/powerpc/mm/mmap.c b/arch/powerpc/mm/mmap.c index 5972d619d274..d9eae456558a 100644 --- a/arch/powerpc/mm/mmap.c +++ b/arch/powerpc/mm/mmap.c @@ -96,7 +96,7 @@ void arch_pick_mmap_layout(struct mm_struct *mm, struct rlimit *rlim_stack) * bit is set, or if the expected stack growth is unlimited: */ if (mmap_is_legacy(rlim_stack)) { - mm->mmap_base = TASK_UNMAPPED_BASE; + mm->mmap_base = TASK_UNMAPPED_BASE + random_factor; mm->get_unmapped_area = arch_get_unmapped_area; } else { mm->mmap_base = mmap_base(random_factor, rlim_stack); From patchwork Sat Apr 9 17:17:36 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 1615305 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; 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Sat, 9 Apr 2022 19:18:14 +0200 (CEST) Received: from PO20335.IDSI0.si.c-s.fr (localhost [127.0.0.1]) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.16.1) with ESMTPS id 239HI9Ir833242 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Sat, 9 Apr 2022 19:18:09 +0200 Received: (from chleroy@localhost) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.17.1/Submit) id 239HI9MQ833241; Sat, 9 Apr 2022 19:18:09 +0200 X-Authentication-Warning: PO20335.IDSI0.si.c-s.fr: chleroy set sender to christophe.leroy@csgroup.eu using -f From: Christophe Leroy To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , akpm@linux-foundation.org Subject: [PATCH v10 12/13] powerpc/mm: Convert to default topdown mmap layout Date: Sat, 9 Apr 2022 19:17:36 +0200 Message-Id: <518f9def87d3c889d5958103e7463cf45a2f673d.1649523076.git.christophe.leroy@csgroup.eu> X-Mailer: git-send-email 2.35.1 In-Reply-To: References: MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1649524640; l=5708; s=20211009; h=from:subject:message-id; bh=Km2WIuqEKAHDbwynBFlki5VDG2vS0gv6RnUqppzgUo4=; b=fFiZCZcYDEbQgmhBG7ojaBaWcZvgX1q52RPaTq4VBOoIdum/H3mzhyA2Xg4HE9G9OXBt26QQWrWA 6xu4+fIKAjDlXe+5CQptObh1QbjHsKnP6Iu4VXbcv9VOnuiChina X-Developer-Key: i=christophe.leroy@csgroup.eu; a=ed25519; pk=HIzTzUj91asvincQGOFx6+ZF5AoUuP9GdOtQChs7Mm0= X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Select CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT and remove arch/powerpc/mm/mmap.c This change reuses the generic framework added by commit 67f3977f805b ("arm64, mm: move generic mmap layout functions to mm") without any functional change. Comparison between powerpc implementation and the generic one: - mmap_is_legacy() is identical. - arch_mmap_rnd() does exactly the same allthough it's written slightly differently. - MIN_GAP and MAX_GAP are identical. - mmap_base() does the same but uses STACK_RND_MASK which provides the same values as stack_maxrandom_size(). - arch_pick_mmap_layout() is identical. Signed-off-by: Christophe Leroy --- arch/powerpc/Kconfig | 2 +- arch/powerpc/include/asm/processor.h | 2 - arch/powerpc/mm/Makefile | 2 +- arch/powerpc/mm/mmap.c | 105 --------------------------- 4 files changed, 2 insertions(+), 109 deletions(-) delete mode 100644 arch/powerpc/mm/mmap.c diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 174edabb74fa..145af02df3dc 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -118,7 +118,6 @@ config PPC select ARCH_HAS_DEBUG_WX if STRICT_KERNEL_RWX select ARCH_HAS_DEVMEM_IS_ALLOWED select ARCH_HAS_DMA_MAP_DIRECT if PPC_PSERIES - select ARCH_HAS_ELF_RANDOMIZE select ARCH_HAS_FORTIFY_SOURCE select ARCH_HAS_GCOV_PROFILE_ALL select ARCH_HAS_HUGEPD if HUGETLB_PAGE @@ -154,6 +153,7 @@ config PPC select ARCH_USE_MEMTEST select ARCH_USE_QUEUED_RWLOCKS if PPC_QUEUED_SPINLOCKS select ARCH_USE_QUEUED_SPINLOCKS if PPC_QUEUED_SPINLOCKS + select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT select ARCH_WANT_IPC_PARSE_VERSION select ARCH_WANT_IRQS_OFF_ACTIVATE_MM select ARCH_WANT_LD_ORPHAN_WARN diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h index 39c25021030f..fdfaae194ddd 100644 --- a/arch/powerpc/include/asm/processor.h +++ b/arch/powerpc/include/asm/processor.h @@ -392,8 +392,6 @@ static inline void prefetchw(const void *x) #define spin_lock_prefetch(x) prefetchw(x) -#define HAVE_ARCH_PICK_MMAP_LAYOUT - /* asm stubs */ extern unsigned long isa300_idle_stop_noloss(unsigned long psscr_val); extern unsigned long isa300_idle_stop_mayloss(unsigned long psscr_val); diff --git a/arch/powerpc/mm/Makefile b/arch/powerpc/mm/Makefile index d4c20484dad9..503a6e249940 100644 --- a/arch/powerpc/mm/Makefile +++ b/arch/powerpc/mm/Makefile @@ -5,7 +5,7 @@ ccflags-$(CONFIG_PPC64) := $(NO_MINIMAL_TOC) -obj-y := fault.o mem.o pgtable.o mmap.o maccess.o pageattr.o \ +obj-y := fault.o mem.o pgtable.o maccess.o pageattr.o \ init_$(BITS).o pgtable_$(BITS).o \ pgtable-frag.o ioremap.o ioremap_$(BITS).o \ init-common.o mmu_context.o drmem.o \ diff --git a/arch/powerpc/mm/mmap.c b/arch/powerpc/mm/mmap.c deleted file mode 100644 index d9eae456558a..000000000000 --- a/arch/powerpc/mm/mmap.c +++ /dev/null @@ -1,105 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * flexible mmap layout support - * - * Copyright 2003-2004 Red Hat Inc., Durham, North Carolina. - * All Rights Reserved. - * - * Started by Ingo Molnar - */ - -#include -#include -#include -#include -#include -#include -#include -#include - -/* - * Top of mmap area (just below the process stack). - * - * Leave at least a ~128 MB hole. - */ -#define MIN_GAP (128*1024*1024) -#define MAX_GAP (TASK_SIZE/6*5) - -static inline int mmap_is_legacy(struct rlimit *rlim_stack) -{ - if (current->personality & ADDR_COMPAT_LAYOUT) - return 1; - - if (rlim_stack->rlim_cur == RLIM_INFINITY) - return 1; - - return sysctl_legacy_va_layout; -} - -unsigned long arch_mmap_rnd(void) -{ - unsigned long shift, rnd; - - shift = mmap_rnd_bits; -#ifdef CONFIG_COMPAT - if (is_32bit_task()) - shift = mmap_rnd_compat_bits; -#endif - rnd = get_random_long() % (1ul << shift); - - return rnd << PAGE_SHIFT; -} - -static inline unsigned long stack_maxrandom_size(void) -{ - if (!(current->flags & PF_RANDOMIZE)) - return 0; - - /* 8MB for 32bit, 1GB for 64bit */ - if (is_32bit_task()) - return (1<<23); - else - return (1<<30); -} - -static inline unsigned long mmap_base(unsigned long rnd, - struct rlimit *rlim_stack) -{ - unsigned long gap = rlim_stack->rlim_cur; - unsigned long pad = stack_maxrandom_size() + stack_guard_gap; - - /* Values close to RLIM_INFINITY can overflow. */ - if (gap + pad > gap) - gap += pad; - - if (gap < MIN_GAP) - gap = MIN_GAP; - else if (gap > MAX_GAP) - gap = MAX_GAP; - - return PAGE_ALIGN(DEFAULT_MAP_WINDOW - gap - rnd); -} - -/* - * This function, called very early during the creation of a new - * process VM image, sets up which VM layout function to use: - */ -void arch_pick_mmap_layout(struct mm_struct *mm, struct rlimit *rlim_stack) -{ - unsigned long random_factor = 0UL; - - if (current->flags & PF_RANDOMIZE) - random_factor = arch_mmap_rnd(); - - /* - * Fall back to the standard layout if the personality - * bit is set, or if the expected stack growth is unlimited: - */ - if (mmap_is_legacy(rlim_stack)) { - mm->mmap_base = TASK_UNMAPPED_BASE + random_factor; - mm->get_unmapped_area = arch_get_unmapped_area; - } else { - mm->mmap_base = mmap_base(random_factor, rlim_stack); - mm->get_unmapped_area = arch_get_unmapped_area_topdown; - } -} From patchwork Sat Apr 9 17:17:37 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 1615310 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; 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Sat, 9 Apr 2022 19:18:14 +0200 (CEST) Received: from PO20335.IDSI0.si.c-s.fr (localhost [127.0.0.1]) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.16.1) with ESMTPS id 239HI96d833246 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Sat, 9 Apr 2022 19:18:09 +0200 Received: (from chleroy@localhost) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.17.1/Submit) id 239HI9DY833245; Sat, 9 Apr 2022 19:18:09 +0200 X-Authentication-Warning: PO20335.IDSI0.si.c-s.fr: chleroy set sender to christophe.leroy@csgroup.eu using -f From: Christophe Leroy To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , akpm@linux-foundation.org Subject: [PATCH v10 13/13] powerpc: Simplify and move arch_randomize_brk() Date: Sat, 9 Apr 2022 19:17:37 +0200 Message-Id: X-Mailer: git-send-email 2.35.1 In-Reply-To: References: MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1649524640; l=3535; s=20211009; h=from:subject:message-id; bh=zgkkILZMT3M8mGho2q1rqSXJJhT6Ogq0UCj70BM83JY=; b=h13PcwPbYh+mXzlIaELEAkKFRN8+OfBTAb48RFFt9WdYtlXhBjSQi/ugTnlr/NDPQdIFaS2E+RlK Vwd4uIhSCzN1Nlc0TVVwFXK7qn1f/+iwDh9JT+rbY9tQs03/KzJR X-Developer-Key: i=christophe.leroy@csgroup.eu; a=ed25519; pk=HIzTzUj91asvincQGOFx6+ZF5AoUuP9GdOtQChs7Mm0= X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" arch_randomize_brk() is only needed for hash on book3s/64, for other platforms the one provided by the default mmap layout is good enough. Move it to hash_utils.c and use randomize_page() like the generic one. And properly opt out the radix case instead of making an assumption on mmu_highuser_ssize. Also change to a 32M range like most other architectures instead of 8M. Signed-off-by: Christophe Leroy --- arch/powerpc/kernel/process.c | 41 --------------------------- arch/powerpc/mm/book3s64/hash_utils.c | 19 +++++++++++++ 2 files changed, 19 insertions(+), 41 deletions(-) diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 984813a4d5dc..e7f809bdd433 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -34,10 +34,8 @@ #include #include #include -#include #include #include -#include #include #include @@ -2313,42 +2311,3 @@ unsigned long arch_align_stack(unsigned long sp) sp -= get_random_int() & ~PAGE_MASK; return sp & ~0xf; } - -static inline unsigned long brk_rnd(void) -{ - unsigned long rnd = 0; - - /* 8MB for 32bit, 1GB for 64bit */ - if (is_32bit_task()) - rnd = (get_random_long() % (1UL<<(23-PAGE_SHIFT))); - else - rnd = (get_random_long() % (1UL<<(30-PAGE_SHIFT))); - - return rnd << PAGE_SHIFT; -} - -unsigned long arch_randomize_brk(struct mm_struct *mm) -{ - unsigned long base = mm->brk; - unsigned long ret; - -#ifdef CONFIG_PPC_BOOK3S_64 - /* - * If we are using 1TB segments and we are allowed to randomise - * the heap, we can put it above 1TB so it is backed by a 1TB - * segment. Otherwise the heap will be in the bottom 1TB - * which always uses 256MB segments and this may result in a - * performance penalty. - */ - if (!radix_enabled() && !is_32bit_task() && (mmu_highuser_ssize == MMU_SEGSIZE_1T)) - base = max_t(unsigned long, mm->brk, 1UL << SID_SHIFT_1T); -#endif - - ret = PAGE_ALIGN(base + brk_rnd()); - - if (ret < mm->brk) - return mm->brk; - - return ret; -} - diff --git a/arch/powerpc/mm/book3s64/hash_utils.c b/arch/powerpc/mm/book3s64/hash_utils.c index 43ecad8f9564..72a3eca02449 100644 --- a/arch/powerpc/mm/book3s64/hash_utils.c +++ b/arch/powerpc/mm/book3s64/hash_utils.c @@ -37,6 +37,8 @@ #include #include #include +#include +#include #include #include @@ -2133,3 +2135,20 @@ void __init print_system_hash_info(void) if (htab_hash_mask) pr_info("htab_hash_mask = 0x%lx\n", htab_hash_mask); } + +unsigned long arch_randomize_brk(struct mm_struct *mm) +{ + /* + * If we are using 1TB segments and we are allowed to randomise + * the heap, we can put it above 1TB so it is backed by a 1TB + * segment. Otherwise the heap will be in the bottom 1TB + * which always uses 256MB segments and this may result in a + * performance penalty. + */ + if (is_32bit_task()) + return randomize_page(mm->brk, SZ_32M); + else if (!radix_enabled() && mmu_highuser_ssize == MMU_SEGSIZE_1T) + return randomize_page(max_t(unsigned long, mm->brk, SZ_1T), SZ_1G); + else + return randomize_page(mm->brk, SZ_1G); +}