From patchwork Mon Apr 22 09:44:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Rapoport X-Patchwork-Id: 13638184 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 10D2AC4345F for ; Mon, 22 Apr 2024 09:46:23 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 983926B00C4; Mon, 22 Apr 2024 05:46:22 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 90C396B00C5; Mon, 22 Apr 2024 05:46:22 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 75F756B00C6; Mon, 22 Apr 2024 05:46:22 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 54AE86B00C4 for ; Mon, 22 Apr 2024 05:46:22 -0400 (EDT) Received: from smtpin01.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 15FB2140977 for ; Mon, 22 Apr 2024 09:46:22 +0000 (UTC) X-FDA: 82036687404.01.EC6B44B Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf14.hostedemail.com (Postfix) with ESMTP id 64B7E10000D for ; Mon, 22 Apr 2024 09:46:20 +0000 (UTC) Authentication-Results: imf14.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=VdtmrfeZ; spf=pass (imf14.hostedemail.com: domain of rppt@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=rppt@kernel.org; dmarc=pass (policy=none) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1713779180; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=xmsfQRbMCoTP823dlxEM5Rbh8VjDL2eiYeOvvXVES4I=; b=etHo+PC01M7IpWM+YWwyhDk0ylNgj+t3roLNRciELn3e7irOwmwW27jUsZ/uI2dMzRENER 3yvSZIu5HRCNZjEd3n3q+fVJkZJEEyKgNLpps2Jfb7Q6dkhWhEvZoj/GoXP4w46Yr+ocHu Zb1p2xZpK4UxdU14UIqeyHNuC6MWr6I= ARC-Authentication-Results: i=1; imf14.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=VdtmrfeZ; spf=pass (imf14.hostedemail.com: domain of rppt@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=rppt@kernel.org; dmarc=pass (policy=none) header.from=kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1713779180; a=rsa-sha256; cv=none; b=iJaKKMwXlMRcJ6eT6xqcvB3+V+zE8E11DNqFGAZmcPp5ie/zrJ7yNqcrAbfMiLhl2exurg WkMgZnCctKOo3Kwm2UEHp9XWgqntNjyGG4B//d0m2nxj57W1uLyPgNGvsyu3Yse+C0T/7p sjwHIzVJLdjgE0WZukc81RmUTtu4WPk= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 7FF2A60C2D; Mon, 22 Apr 2024 09:46:19 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E4DF0C113CC; Mon, 22 Apr 2024 09:46:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1713779179; bh=gfErhFRatdpAY1f4SRbflXk98ZKEgFQtUzV/JJxA0VI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VdtmrfeZ4DrQ7G2DcDhDkghvIY/NpiInVOLLJYsFcIdjCiMRhOI7jGlw1suX3ZdJY tyhlomCEeMr961vLl/ak9wYu2iobHXxMc091oDsa49GTt3H+IAQvPjBgLEPS/yik7A drF07cHOBqjFBzRFdy1byHQPcoDBJm4roN47vQXD/ZgCn4HyTEjGGQL7rVYE7FSVM/ xTYzMkPgpRCaEaB4Mr7CSh79zp+cqD87N/rd05Zo2DiQQFqnf1Mrdmrw1Q7dudaBEf uSCGNOgaYPS/v6vRb8T8QKYtuSw0bNDCoK0h4PuBS6i5K2iX1oYsQDb2aGSK9QogSe NN0k0YqSMN5FQ== From: Mike Rapoport To: linux-kernel@vger.kernel.org Cc: Alexandre Ghiti , Andrew Morton , =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= , Catalin Marinas , Christophe Leroy , "David S. Miller" , Dinh Nguyen , Donald Dutile , Eric Chanudet , Heiko Carstens , Helge Deller , Huacai Chen , Kent Overstreet , Luis Chamberlain , Mark Rutland , Masami Hiramatsu , Michael Ellerman , Mike Rapoport , Nadav Amit , Palmer Dabbelt , Peter Zijlstra , Rick Edgecombe , Russell King , Sam Ravnborg , Song Liu , Steven Rostedt , Thomas Bogendoerfer , Thomas Gleixner , Will Deacon , bpf@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-modules@vger.kernel.org, linux-parisc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, sparclinux@vger.kernel.org, x86@kernel.org Subject: [PATCH v5 07/15] mm/execmem, arch: convert simple overrides of module_alloc to execmem Date: Mon, 22 Apr 2024 12:44:28 +0300 Message-ID: <20240422094436.3625171-8-rppt@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240422094436.3625171-1-rppt@kernel.org> References: <20240422094436.3625171-1-rppt@kernel.org> MIME-Version: 1.0 X-Rspamd-Queue-Id: 64B7E10000D X-Stat-Signature: gphghgu3nwpahidm1n5okhkspceng4n3 X-Rspam-User: X-Rspamd-Server: rspam07 X-HE-Tag: 1713779180-625959 X-HE-Meta: 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 Lwqq7TXZ Nm0jyLYXdo8yMmIYn5o1dDT26TbEReZ9wAvu4XUJBnY2O3hnqL+3LDJYvUTFgADMwqnF4UrwugkgtEU9rB1SmkBlAJAdv3wbAuBNGcv+S46ihi39ohDDBQsjTBL/K2gGy1ujZKy5KfDjrfZlGmV4Mi+pNQAZHYuZ6WPO2Q44+pxQNr17h4KcOHjAgYbLxYCR51CPKvGLBcmlSQugawDk/XdQwi/T3cdYWVZIFSm2rGYfvBmGbvSr9AV4zs2KCTMFtZpr3XdiCM5Zg1v+pM/CIKNTRTToLZnxZYLGgUGNWgXiIXRvDQ5xaPkcRJexAExSKPNvwtkIzuZVt9rvdJB4fcGsuue+/3uK+4lQIWKyipNcWXcA= 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: List-Subscribe: List-Unsubscribe: From: "Mike Rapoport (IBM)" Several architectures override module_alloc() only to define address range for code allocations different than VMALLOC address space. Provide a generic implementation in execmem that uses the parameters for address space ranges, required alignment and page protections provided by architectures. The architectures must fill execmem_info structure and implement execmem_arch_setup() that returns a pointer to that structure. This way the execmem initialization won't be called from every architecture, but rather from a central place, namely a core_initcall() in execmem. The execmem provides execmem_alloc() API that wraps __vmalloc_node_range() with the parameters defined by the architectures. If an architecture does not implement execmem_arch_setup(), execmem_alloc() will fall back to module_alloc(). Signed-off-by: Mike Rapoport (IBM) --- arch/loongarch/kernel/module.c | 19 +++++++-- arch/mips/kernel/module.c | 20 ++++++++-- arch/nios2/kernel/module.c | 21 +++++++--- arch/parisc/kernel/module.c | 24 +++++++---- arch/riscv/kernel/module.c | 24 +++++++---- arch/sparc/kernel/module.c | 20 ++++++++-- include/linux/execmem.h | 41 +++++++++++++++++++ mm/execmem.c | 73 ++++++++++++++++++++++++++++++++-- 8 files changed, 208 insertions(+), 34 deletions(-) diff --git a/arch/loongarch/kernel/module.c b/arch/loongarch/kernel/module.c index c7d0338d12c1..ca6dd7ea1610 100644 --- a/arch/loongarch/kernel/module.c +++ b/arch/loongarch/kernel/module.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include #include @@ -490,10 +491,22 @@ int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab, return 0; } -void *module_alloc(unsigned long size) +static struct execmem_info execmem_info __ro_after_init; + +struct execmem_info __init *execmem_arch_setup(void) { - return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END, - GFP_KERNEL, PAGE_KERNEL, 0, NUMA_NO_NODE, __builtin_return_address(0)); + execmem_info = (struct execmem_info){ + .ranges = { + [EXECMEM_DEFAULT] = { + .start = MODULES_VADDR, + .end = MODULES_END, + .pgprot = PAGE_KERNEL, + .alignment = 1, + }, + }, + }; + + return &execmem_info; } static void module_init_ftrace_plt(const Elf_Ehdr *hdr, diff --git a/arch/mips/kernel/module.c b/arch/mips/kernel/module.c index 9a6c96014904..59225a3cf918 100644 --- a/arch/mips/kernel/module.c +++ b/arch/mips/kernel/module.c @@ -20,6 +20,7 @@ #include #include #include +#include #include struct mips_hi16 { @@ -32,11 +33,22 @@ static LIST_HEAD(dbe_list); static DEFINE_SPINLOCK(dbe_lock); #ifdef MODULES_VADDR -void *module_alloc(unsigned long size) +static struct execmem_info execmem_info __ro_after_init; + +struct execmem_info __init *execmem_arch_setup(void) { - return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END, - GFP_KERNEL, PAGE_KERNEL, 0, NUMA_NO_NODE, - __builtin_return_address(0)); + execmem_info = (struct execmem_info){ + .ranges = { + [EXECMEM_DEFAULT] = { + .start = MODULES_VADDR, + .end = MODULES_END, + .pgprot = PAGE_KERNEL, + .alignment = 1, + }, + }, + }; + + return &execmem_info; } #endif diff --git a/arch/nios2/kernel/module.c b/arch/nios2/kernel/module.c index 9c97b7513853..0d1ee86631fc 100644 --- a/arch/nios2/kernel/module.c +++ b/arch/nios2/kernel/module.c @@ -18,15 +18,26 @@ #include #include #include +#include #include -void *module_alloc(unsigned long size) +static struct execmem_info execmem_info __ro_after_init; + +struct execmem_info __init *execmem_arch_setup(void) { - return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END, - GFP_KERNEL, PAGE_KERNEL_EXEC, - VM_FLUSH_RESET_PERMS, NUMA_NO_NODE, - __builtin_return_address(0)); + execmem_info = (struct execmem_info){ + .ranges = { + [EXECMEM_DEFAULT] = { + .start = MODULES_VADDR, + .end = MODULES_END, + .pgprot = PAGE_KERNEL_EXEC, + .alignment = 1, + }, + }, + }; + + return &execmem_info; } int apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab, diff --git a/arch/parisc/kernel/module.c b/arch/parisc/kernel/module.c index d214bbe3c2af..bdfa85e10c1b 100644 --- a/arch/parisc/kernel/module.c +++ b/arch/parisc/kernel/module.c @@ -49,6 +49,7 @@ #include #include #include +#include #include #include @@ -173,15 +174,22 @@ static inline int reassemble_22(int as22) ((as22 & 0x0003ff) << 3)); } -void *module_alloc(unsigned long size) +static struct execmem_info execmem_info __ro_after_init; + +struct execmem_info __init *execmem_arch_setup(void) { - /* using RWX means less protection for modules, but it's - * easier than trying to map the text, data, init_text and - * init_data correctly */ - return __vmalloc_node_range(size, 1, VMALLOC_START, VMALLOC_END, - GFP_KERNEL, - PAGE_KERNEL_RWX, 0, NUMA_NO_NODE, - __builtin_return_address(0)); + execmem_info = (struct execmem_info){ + .ranges = { + [EXECMEM_DEFAULT] = { + .start = VMALLOC_START, + .end = VMALLOC_END, + .pgprot = PAGE_KERNEL_RWX, + .alignment = 1, + }, + }, + }; + + return &execmem_info; } #ifndef CONFIG_64BIT diff --git a/arch/riscv/kernel/module.c b/arch/riscv/kernel/module.c index 5e5a82644451..182904127ba0 100644 --- a/arch/riscv/kernel/module.c +++ b/arch/riscv/kernel/module.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include @@ -906,13 +907,22 @@ int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab, } #if defined(CONFIG_MMU) && defined(CONFIG_64BIT) -void *module_alloc(unsigned long size) -{ - return __vmalloc_node_range(size, 1, MODULES_VADDR, - MODULES_END, GFP_KERNEL, - PAGE_KERNEL, VM_FLUSH_RESET_PERMS, - NUMA_NO_NODE, - __builtin_return_address(0)); +static struct execmem_info execmem_info __ro_after_init; + +struct execmem_info __init *execmem_arch_setup(void) +{ + execmem_info = (struct execmem_info){ + .ranges = { + [EXECMEM_DEFAULT] = { + .start = MODULES_VADDR, + .end = MODULES_END, + .pgprot = PAGE_KERNEL, + .alignment = 1, + }, + }, + }; + + return &execmem_info; } #endif diff --git a/arch/sparc/kernel/module.c b/arch/sparc/kernel/module.c index d37adb2a0b54..8b7ee45defc3 100644 --- a/arch/sparc/kernel/module.c +++ b/arch/sparc/kernel/module.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include @@ -21,11 +22,22 @@ #include "entry.h" -void *module_alloc(unsigned long size) +static struct execmem_info execmem_info __ro_after_init; + +struct execmem_info __init *execmem_arch_setup(void) { - return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END, - GFP_KERNEL, PAGE_KERNEL, 0, NUMA_NO_NODE, - __builtin_return_address(0)); + execmem_info = (struct execmem_info){ + .ranges = { + [EXECMEM_DEFAULT] = { + .start = MODULES_VADDR, + .end = MODULES_END, + .pgprot = PAGE_KERNEL, + .alignment = 1, + }, + }, + }; + + return &execmem_info; } /* Make generic code ignore STT_REGISTER dummy undefined symbols. */ diff --git a/include/linux/execmem.h b/include/linux/execmem.h index 8eebc8ef66e7..ad5d99bb2871 100644 --- a/include/linux/execmem.h +++ b/include/linux/execmem.h @@ -33,6 +33,47 @@ enum execmem_type { EXECMEM_TYPE_MAX, }; +/** + * struct execmem_range - definition of an address space suitable for code and + * related data allocations + * @start: address space start + * @end: address space end (inclusive) + * @pgprot: permissions for memory in this address space + * @alignment: alignment required for text allocations + */ +struct execmem_range { + unsigned long start; + unsigned long end; + pgprot_t pgprot; + unsigned int alignment; +}; + +/** + * struct execmem_info - architecture parameters for code allocations + * @ranges: array of parameter sets defining architecture specific + * parameters for executable memory allocations. The ranges that are not + * explicitly initialized by an architecture use parameters defined for + * @EXECMEM_DEFAULT. + */ +struct execmem_info { + struct execmem_range ranges[EXECMEM_TYPE_MAX]; +}; + +/** + * execmem_arch_setup - define parameters for allocations of executable memory + * + * A hook for architectures to define parameters for allocations of + * executable memory. These parameters should be filled into the + * @execmem_info structure. + * + * For architectures that do not implement this method a default set of + * parameters will be used + * + * Return: a structure defining architecture parameters and restrictions + * for allocations of executable memory + */ +struct execmem_info *execmem_arch_setup(void); + /** * execmem_alloc - allocate executable memory * @type: type of the allocation diff --git a/mm/execmem.c b/mm/execmem.c index 480adc69b20d..d062bc21c6b2 100644 --- a/mm/execmem.c +++ b/mm/execmem.c @@ -11,14 +11,30 @@ #include #include -static void *__execmem_alloc(size_t size) +static struct execmem_info *execmem_info __ro_after_init; + +static void *__execmem_alloc(struct execmem_range *range, size_t size) { - return module_alloc(size); + unsigned long start = range->start; + unsigned long end = range->end; + unsigned int align = range->alignment; + pgprot_t pgprot = range->pgprot; + + return __vmalloc_node_range(size, align, start, end, + GFP_KERNEL, pgprot, VM_FLUSH_RESET_PERMS, + NUMA_NO_NODE, __builtin_return_address(0)); } void *execmem_alloc(enum execmem_type type, size_t size) { - return __execmem_alloc(size); + struct execmem_range *range; + + if (!execmem_info) + return module_alloc(size); + + range = &execmem_info->ranges[type]; + + return __execmem_alloc(range, size); } void execmem_free(void *ptr) @@ -30,3 +46,54 @@ void execmem_free(void *ptr) WARN_ON(in_interrupt()); vfree(ptr); } + +static bool execmem_validate(struct execmem_info *info) +{ + struct execmem_range *r = &info->ranges[EXECMEM_DEFAULT]; + + if (!r->alignment || !r->start || !r->end || !pgprot_val(r->pgprot)) { + pr_crit("Invalid parameters for execmem allocator, module loading will fail"); + return false; + } + + return true; +} + +static void execmem_init_missing(struct execmem_info *info) +{ + struct execmem_range *default_range = &info->ranges[EXECMEM_DEFAULT]; + + for (int i = EXECMEM_DEFAULT + 1; i < EXECMEM_TYPE_MAX; i++) { + struct execmem_range *r = &info->ranges[i]; + + if (!r->start) { + r->pgprot = default_range->pgprot; + r->alignment = default_range->alignment; + r->start = default_range->start; + r->end = default_range->end; + } + } +} + +struct execmem_info * __weak execmem_arch_setup(void) +{ + return NULL; +} + +static int __init execmem_init(void) +{ + struct execmem_info *info = execmem_arch_setup(); + + if (!info) + return 0; + + if (!execmem_validate(info)) + return -EINVAL; + + execmem_init_missing(info); + + execmem_info = info; + + return 0; +} +core_initcall(execmem_init);