From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9AF5BC7EE22 for ; Tue, 9 May 2023 15:37:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235639AbjEIPhv (ORCPT ); Tue, 9 May 2023 11:37:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51654 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234828AbjEIPht (ORCPT ); Tue, 9 May 2023 11:37:49 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A6AEE19A4 for ; Tue, 9 May 2023 08:37:48 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 3616B60D24 for ; Tue, 9 May 2023 15:37:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C824EC433D2; Tue, 9 May 2023 15:37:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1683646667; bh=FByPzvBStNqHUfRWd9lr/eiev+34CMu90xFrzHsEDhY=; h=From:To:Cc:Subject:Date:From; b=k6KScQglaZq1S9PBBnYM4QsLoCZmvYpyWTWAla94VYTVzgMHUgFx5Lfv0SAywuSdf L3tXm7rZI1jDrIoD810mafHx2ngaznzAFV/nWu5yNkwHMdO1XzY6g8HaSJRXLbXYs5 ivzCx0T5XyB6dMRHFtlbOWOQQmiaph1pD4BgrWIyEW9XiRFsnFzwVX1E6NtYSWphHx bkQz9meyCERBguqRn4Et2XTTa+z9U1PZbiPt9jYD8z1BklyHkqNyRqgf+gMHOW/1uJ bALL4wjzacJ7bGvnnqbXUMFt0D/uX3fvakwzU6MDbv2cPVVgpL0NONOn3ovHxhw1Ks NUF29nSSwJz/A== From: Jisheng Zhang To: Paul Walmsley , Palmer Dabbelt , Albert Ou Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v2] riscv: mm: stub extable related functions/macros for !MMU Date: Tue, 9 May 2023 23:26:41 +0800 Message-Id: <20230509152641.805-1-jszhang@kernel.org> X-Mailer: git-send-email 2.40.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org extable relies on the MMU to work properly, so it's useless to include __ex_table sections and build extable related functions for !MMU case. Signed-off-by: Jisheng Zhang --- Since v1: - fix a typo: s/MMU/CONFIG_MMU arch/riscv/include/asm/asm-extable.h | 6 ++++++ arch/riscv/include/asm/extable.h | 4 ++++ arch/riscv/mm/Makefile | 3 +-- 3 files changed, 11 insertions(+), 2 deletions(-) diff --git a/arch/riscv/include/asm/asm-extable.h b/arch/riscv/include/asm/asm-extable.h index 14be0673f5b5..00a96e7a9664 100644 --- a/arch/riscv/include/asm/asm-extable.h +++ b/arch/riscv/include/asm/asm-extable.h @@ -7,6 +7,8 @@ #define EX_TYPE_BPF 2 #define EX_TYPE_UACCESS_ERR_ZERO 3 +#ifdef CONFIG_MMU + #ifdef __ASSEMBLY__ #define __ASM_EXTABLE_RAW(insn, fixup, type, data) \ @@ -62,4 +64,8 @@ #endif /* __ASSEMBLY__ */ +#else /* CONFIG_MMU */ + #define _ASM_EXTABLE_UACCESS_ERR(insn, fixup, err) +#endif /* CONFIG_MMU */ + #endif /* __ASM_ASM_EXTABLE_H */ diff --git a/arch/riscv/include/asm/extable.h b/arch/riscv/include/asm/extable.h index 512012d193dc..3eb5c1f7bf34 100644 --- a/arch/riscv/include/asm/extable.h +++ b/arch/riscv/include/asm/extable.h @@ -32,7 +32,11 @@ do { \ (b)->data = (tmp).data; \ } while (0) +#ifdef CONFIG_MMU bool fixup_exception(struct pt_regs *regs); +#else +static inline bool fixup_exception(struct pt_regs *regs) { return false; } +#endif #if defined(CONFIG_BPF_JIT) && defined(CONFIG_ARCH_RV64I) bool ex_handler_bpf(const struct exception_table_entry *ex, struct pt_regs *regs); diff --git a/arch/riscv/mm/Makefile b/arch/riscv/mm/Makefile index b85e9e82f082..9c454f90fd3d 100644 --- a/arch/riscv/mm/Makefile +++ b/arch/riscv/mm/Makefile @@ -13,8 +13,7 @@ endif KCOV_INSTRUMENT_init.o := n obj-y += init.o -obj-y += extable.o -obj-$(CONFIG_MMU) += fault.o pageattr.o +obj-$(CONFIG_MMU) += extable.o fault.o pageattr.o obj-y += cacheflush.o obj-y += context.o obj-y += pgtable.o -- 2.40.0