From nobody Thu Nov 28 02:36:25 2024 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 89C2013D53B; Mon, 7 Oct 2024 06:31:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728282689; cv=none; b=kHrYN13bLWNUnubk62CEddQqOxQDLR73vZ3Qgb3rTgrjIJxGKdnPR5pLjC7urOX4EKxv7CnnjrQkczKYq6zlcu0WfFoy5B1JvjNGPuHrPdHYdVfWxVV2enMVTIQ4/mPneXucAh8wNIkAVl7WVNDR79j6BAHCcZDsPXHV3oZO6Zg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728282689; c=relaxed/simple; bh=l7egSUNcilONf7gTBq0Hjl37ut+S55vwboWjXSdFWe0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YlGTfFU0BNUNHjO3SPmPKByoH7cPXtBHJ+mTEpTLGAhE91jFSw8ZH3NH1xgS4iKT4fa+GgUhKYwmnySNui6zyPPoOI+NyxUN3WxIAGTF6EuqNl2efpfPluUbnvX+s7f09yzTncXrIvaAtWkiqCJLo2hqPTQqkT08SAVE/bMg4ug= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=d5WdCg6Q; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="d5WdCg6Q" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 01844C4CECF; Mon, 7 Oct 2024 06:31:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728282689; bh=l7egSUNcilONf7gTBq0Hjl37ut+S55vwboWjXSdFWe0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=d5WdCg6QSd7SstfrUQDCwWsvOnXL2HjQin7m1gEvD09o/DpyujqnKes3WgYGTvKOT 8fJupYh4P7AD8z21iOCA24rSlPpZgrC0ler/FB88Rk83zueQWu5DliMx8e2O8aTZy1 2WuyKBqO7T0WcSvhAXTmxQ8uEF0O7cPfGLlPULXqmDuI73io26/AinRB6Mxie4EdiX eqqjSoB2Hzf0RdcuIX8LTr/1ZAWIhDwvRQaFN3mQv0heCDOMIj3IHzRdHmbpyUkqBx A7M0PE4IScMmPLSDTSkp1aHDV0LltxKlDIJG2E+qlhVUGri7q26OTN/ytz1rzd+xsQ LLK619DlFqppA== From: Mike Rapoport To: Andrew Morton Cc: Andreas Larsson , Andy Lutomirski , Ard Biesheuvel , Arnd Bergmann , Borislav Petkov , Brian Cain , Catalin Marinas , Christoph Hellwig , Christophe Leroy , Dave Hansen , Dinh Nguyen , Geert Uytterhoeven , Guo Ren , Helge Deller , Huacai Chen , Ingo Molnar , Johannes Berg , John Paul Adrian Glaubitz , Kent Overstreet , "Liam R. Howlett" , Luis Chamberlain , Mark Rutland , Masami Hiramatsu , Matt Turner , Max Filippov , Michael Ellerman , Michal Simek , Mike Rapoport , Oleg Nesterov , Palmer Dabbelt , Peter Zijlstra , Richard Weinberger , Russell King , Song Liu , Stafford Horne , Steven Rostedt , Thomas Bogendoerfer , Thomas Gleixner , Uladzislau Rezki , Vineet Gupta , Will Deacon , bpf@vger.kernel.org, linux-alpha@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-modules@vger.kernel.org, linux-openrisc@vger.kernel.org, linux-parisc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-sh@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-trace-kernel@vger.kernel.org, linux-um@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, loongarch@lists.linux.dev, sparclinux@vger.kernel.org, x86@kernel.org Subject: [PATCH v4 8/8] x86/module: enable ROX caches for module text Date: Mon, 7 Oct 2024 09:28:58 +0300 Message-ID: <20241007062858.44248-9-rppt@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241007062858.44248-1-rppt@kernel.org> References: <20241007062858.44248-1-rppt@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: "Mike Rapoport (Microsoft)" Enable execmem's cache of PMD_SIZE'ed pages mapped as ROX for module text allocations. Signed-off-by: Mike Rapoport (Microsoft) --- arch/x86/mm/init.c | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index eb503f53c319..a0ec99fb9385 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -1053,6 +1053,15 @@ unsigned long arch_max_swapfile_size(void) #ifdef CONFIG_EXECMEM static struct execmem_info execmem_info __ro_after_init; =20 +static void execmem_fill_trapping_insns(void *ptr, size_t size, bool write= able) +{ + /* fill memory with INT3 instructions */ + if (writeable) + memset(ptr, INT3_INSN_OPCODE, size); + else + text_poke_set(ptr, INT3_INSN_OPCODE, size); +} + struct execmem_info __init *execmem_arch_setup(void) { unsigned long start, offset =3D 0; @@ -1063,8 +1072,23 @@ struct execmem_info __init *execmem_arch_setup(void) start =3D MODULES_VADDR + offset; =20 execmem_info =3D (struct execmem_info){ + .fill_trapping_insns =3D execmem_fill_trapping_insns, .ranges =3D { - [EXECMEM_DEFAULT] =3D { + [EXECMEM_MODULE_TEXT] =3D { + .flags =3D EXECMEM_KASAN_SHADOW | EXECMEM_ROX_CACHE, + .start =3D start, + .end =3D MODULES_END, + .pgprot =3D PAGE_KERNEL_ROX, + .alignment =3D MODULE_ALIGN, + }, + [EXECMEM_KPROBES ... EXECMEM_BPF] =3D { + .flags =3D EXECMEM_KASAN_SHADOW, + .start =3D start, + .end =3D MODULES_END, + .pgprot =3D PAGE_KERNEL, + .alignment =3D MODULE_ALIGN, + }, + [EXECMEM_MODULE_DATA] =3D { .flags =3D EXECMEM_KASAN_SHADOW, .start =3D start, .end =3D MODULES_END, --=20 2.43.0