From patchwork Mon Apr 22 08:47:15 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Rapoport X-Patchwork-Id: 13637948 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 B1AD0C10F16 for ; Mon, 22 Apr 2024 08:48:49 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 4ED106B00A8; Mon, 22 Apr 2024 04:48:49 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 49C9B6B00A9; Mon, 22 Apr 2024 04:48:49 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3640F6B00AA; Mon, 22 Apr 2024 04:48:49 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 1839F6B00A8 for ; Mon, 22 Apr 2024 04:48:49 -0400 (EDT) Received: from smtpin12.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id BE948140B27 for ; Mon, 22 Apr 2024 08:48:48 +0000 (UTC) X-FDA: 82036542336.12.A13F7D8 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf30.hostedemail.com (Postfix) with ESMTP id 462A780009 for ; Mon, 22 Apr 2024 08:48:47 +0000 (UTC) Authentication-Results: imf30.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=PClOfv5c; spf=pass (imf30.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=1713775727; a=rsa-sha256; cv=none; b=q4yQN1NOVLBxGIRYs+1Iiq8I310Evf/i0uU7TFWk2Bf3bg+tmKTvOLCNFIrqMtOXCDK4xW ujf0tApCtnXUX6VLRZo0dnNDNOBldM8NcYMrbwmeWcU+opA6W7i64Tb5fp7QTDYt1v5dfp dDHzt3CYV+mO6BAqmCrerqgjEvZ8FvY= ARC-Authentication-Results: i=1; imf30.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=PClOfv5c; spf=pass (imf30.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=1713775727; 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=K9A2BytNzg9dmYDt1NDdoZH+CxWRZ1m5kegtXWGYrHRM6ZaTnQvdrLgt28J2MWN91s82Ab 07ztKTxjXPHFX3dOd/QyRecgNRxbd+yJwXxh5MPZd0xJ1rTlCmn7G3d1pf1x0oR6KpWQLV 8goT6bTsm1wDuPshUPGZmPdoLSkWTio= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 6B28F60C47; Mon, 22 Apr 2024 08:48:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4709AC32786; Mon, 22 Apr 2024 08:48:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1713775726; bh=gfErhFRatdpAY1f4SRbflXk98ZKEgFQtUzV/JJxA0VI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PClOfv5c2DLMDhfec5Pnkhi7gymfa2HPPAQ81g/nIezkTlZcud/IQHVb5JbM+Ox7T cNKutatS9g4BYMs4UrrDedBwXam/RektcZFoEwAJ8ZCSfD7MTkqgNSoX87tZNgRNjy +fopJ/WD/G69bYzeplblmGSBVZsksvbWTWl52ThtcH9WtMB/U+oPbhtlh+IYIIGvmA uj4hq09+znwleWKnkv04IYC1iBvy1G5+AYq/z8FMXc6X1EXCdEuB17ycuPdiwKayU8 W8UW8Cy6NNZgWtWF8Dc2ESRappRpr2zFPb92eYa9HcEeFfEDAKyQbZwxfc+OuvC8G/ zqws1zN0Z4cnQ== 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 11:47:15 +0300 Message-ID: <20240422084717.3602332-7-rppt@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240422084717.3602332-1-rppt@kernel.org> References: <20240422084717.3602332-1-rppt@kernel.org> MIME-Version: 1.0 X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 462A780009 X-Stat-Signature: d1uc6be19omgjq6yse45iijendpfjs8p X-Rspam-User: X-HE-Tag: 1713775727-571036 X-HE-Meta: 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 jGQgJuY+ 77Ad/VFOF+GIuNsIkR7+kexFDEXvHNmDzBbl4OLH1/rtW1G0ohluLMr57OUWa/n57n5tpLh2BgQPyjeY= 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);