From patchwork Tue Apr 7 14:46:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zong Li X-Patchwork-Id: 11478257 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2F5CD81 for ; Tue, 7 Apr 2020 14:47:44 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E6F862082F for ; Tue, 7 Apr 2020 14:47:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="W9T/Egq4"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=sifive.com header.i=@sifive.com header.b="JBxizfUV" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E6F862082F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=sifive.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-Id:Date :Subject:To:From:Reply-To:Content-Type:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=geDMvpdyp4eREUjGenxPiMAgszPzsf8hdgTrRUcyDVI=; b=W9T/Egq4kYJZh9 diSsjHdwzOQzSYrnWYgGGfBEkIjBiQVzkkQxEYymrggo4YDKUdmqVrmfmanxOybp2i7h09auTkQ1y ya+Yv6rIfQaY0tmLv8PgQ3Wh8+ccIGjJrVsUPqx8QGsd2mKO+Y7J/vchYh2EftForqDndeOC/M0+8 jdq6NJoHD6DbsbQRf8O8Sx96mBZQktzC3+dEpcvF4dTmeZzYsWRpdxjUzTso440rbbS7NMW/ONoVt UD9e+IirME/XeL9vxK//uQGKrRhl+KJcv90Dx7rmOyjfnAmXv9yYtaEroOwOWhID76jwH09aNcBFL rmYeftUJsl+oB6UZIq4g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jLpVp-0006uO-6y; Tue, 07 Apr 2020 14:47:37 +0000 Received: from mail-pg1-x544.google.com ([2607:f8b0:4864:20::544]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jLpVT-0006Qh-S1 for linux-riscv@lists.infradead.org; Tue, 07 Apr 2020 14:47:17 +0000 Received: by mail-pg1-x544.google.com with SMTP id r4so1835678pgg.4 for ; Tue, 07 Apr 2020 07:47:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=geDMvpdyp4eREUjGenxPiMAgszPzsf8hdgTrRUcyDVI=; b=JBxizfUVQ4VwCje90RdukKZBh/ywXEy+VAtWwgau09WHsbrygimeUgLaDGNihbFdPZ eDybrac2/Ma3vtwVtZ+dV10ejldg12V79mPPn+6PEcb+pYiamkJfHvdVCc3pQywEgffS 61nByA/bmGC+KvIQ961VXAVS+jeOKfdvsn2YvlzRhS4+b9g+s7hBJOhV9Zurmg6tfc88 hRFeb/pdtnq4jQdvIW1maqRVT/GoZMh6q3OCXYlUAxtVz2Sa7KW7AhM451d55reG1kbv bdvnAWUvHjr7PiJ0CRL0hEJnBVdf4VVNAcT2NTV9xOdaANofRCoMNuG4j0Ia+W6wAhRU xUww== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=geDMvpdyp4eREUjGenxPiMAgszPzsf8hdgTrRUcyDVI=; b=P6+aA9ikySiuI0+rjfQmKUvmCC0dhMoyTrChmDY6b/BGLPcHNcLqKTVLN9TqR1xB/+ QTMiU44ZU2Oa/ivYJyBKHEH6Pef0sy2idCVGIQDoxkMoSCuhDIdTAslkWGT7Eqwu7t8f 9ljWubJaOzidHD1goJs2D0rt22A8gNZ+OXJOfpJMI0d6L1/FkdywO3lPDU1wtXTEz7cd 84oum21Of3jiAiu8EtkT6i4pQ37TncELLu9DJoNmobH7R3CBhXqx3xdrZr+F14fPzmio z1FSw7nHD6DKBp/9ib5d0bcwc9ZrNrdDhy8/oG3N7DLzSgY+Qh4sEIF7wIjpHfTKGD6a P1ig== X-Gm-Message-State: AGi0PuYjy7iaGLYcvPuIq3WqCtmt7RcmScmED24D2LpW6XkOhkENW3cE 6TnyIE7SJxjQbB0k9m9z3vPbVA== X-Google-Smtp-Source: APiQypJSC+TFUHwlK7PTtzsWm3RbNjRWth5EDoVm2mJoigQnMWAkG6PwXQSKKLPQx1AAHMmzFA/bEg== X-Received: by 2002:aa7:9a08:: with SMTP id w8mr2724871pfj.317.1586270835251; Tue, 07 Apr 2020 07:47:15 -0700 (PDT) Received: from hsinchu02.internal.sifive.com (220-132-236-182.HINET-IP.hinet.net. [220.132.236.182]) by smtp.gmail.com with ESMTPSA id y15sm14190093pfc.206.2020.04.07.07.47.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Apr 2020 07:47:14 -0700 (PDT) From: Zong Li To: palmer@dabbelt.com, paul.walmsley@sifive.com, aou@eecs.berkeley.edu, mhiramat@kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 8/9] riscv: add alignment for text, rodata and data sections Date: Tue, 7 Apr 2020 22:46:53 +0800 Message-Id: <24d705447a3033ee94c3dc9687b97870e2521090.1586265122.git.zong.li@sifive.com> X-Mailer: git-send-email 2.26.0 In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200407_074715_916028_8AA88D56 X-CRM114-Status: GOOD ( 11.91 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:544 listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Palmer Dabbelt , Zong Li Sender: "linux-riscv" Errors-To: linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org The kernel mapping will tried to optimize its mapping by using bigger size. In rv64, it tries to use PMD_SIZE, and tryies to use PGDIR_SIZE in rv32. To ensure that the start address of these sections could fit the mapping entry size, make them align to the biggest alignment. Define a macro SECTION_ALIGN because the HPAGE_SIZE or PMD_SIZE, etc., are invisible in linker script. This patch is prepared for STRICT_KERNEL_RWX support. Signed-off-by: Zong Li Reviewed-by: Palmer Dabbelt --- arch/riscv/include/asm/set_memory.h | 13 +++++++++++++ arch/riscv/kernel/vmlinux.lds.S | 5 ++++- 2 files changed, 17 insertions(+), 1 deletion(-) diff --git a/arch/riscv/include/asm/set_memory.h b/arch/riscv/include/asm/set_memory.h index 620d81c372d9..4c5bae7ca01c 100644 --- a/arch/riscv/include/asm/set_memory.h +++ b/arch/riscv/include/asm/set_memory.h @@ -6,6 +6,7 @@ #ifndef _ASM_RISCV_SET_MEMORY_H #define _ASM_RISCV_SET_MEMORY_H +#ifndef __ASSEMBLY__ /* * Functions to change memory attributes. */ @@ -24,4 +25,16 @@ static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; } int set_direct_map_invalid_noflush(struct page *page); int set_direct_map_default_noflush(struct page *page); +#endif /* __ASSEMBLY__ */ + +#ifdef CONFIG_ARCH_HAS_STRICT_KERNEL_RWX +#ifdef CONFIG_64BIT +#define SECTION_ALIGN (1 << 21) +#else +#define SECTION_ALIGN (1 << 22) +#endif +#else /* !CONFIG_ARCH_HAS_STRICT_KERNEL_RWX */ +#define SECTION_ALIGN L1_CACHE_BYTES +#endif /* CONFIG_ARCH_HAS_STRICT_KERNEL_RWX */ + #endif /* _ASM_RISCV_SET_MEMORY_H */ diff --git a/arch/riscv/kernel/vmlinux.lds.S b/arch/riscv/kernel/vmlinux.lds.S index 02e948b620af..ef87deea0350 100644 --- a/arch/riscv/kernel/vmlinux.lds.S +++ b/arch/riscv/kernel/vmlinux.lds.S @@ -9,6 +9,7 @@ #include #include #include +#include OUTPUT_ARCH(riscv) ENTRY(_start) @@ -36,6 +37,7 @@ SECTIONS PERCPU_SECTION(L1_CACHE_BYTES) __init_end = .; + . = ALIGN(SECTION_ALIGN); .text : { _text = .; _stext = .; @@ -53,13 +55,14 @@ SECTIONS /* Start of data section */ _sdata = .; - RO_DATA(L1_CACHE_BYTES) + RO_DATA(SECTION_ALIGN) .srodata : { *(.srodata*) } EXCEPTION_TABLE(0x10) + . = ALIGN(SECTION_ALIGN); _data = .; RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE)