From patchwork Thu Feb 13 16:16:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincenzo Frascino X-Patchwork-Id: 11380767 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 3276913A4 for ; Thu, 13 Feb 2020 16:20:04 +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 08DCF206ED for ; Thu, 13 Feb 2020 16:20:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="hWE9EI2i" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 08DCF206ED Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=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: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=o921TX48Oa11Myi00ivL7VpsoYiFcdXSwBzLOsNNocc=; b=hWE9EI2i21bJDT u27kZpZP3lTbTJ3SoBL/Xuy7DUTnu+Ob+lP2srUwxfCBlyhVBZUaaiiDKuP3VJ3Fc12upO0FFD0BB UwEKpwfqQcvV1gGfzoz6+f7FV6qqjrf/uXFOnsmaw6EPKoewLuSx+raJ+vQyZeN5s9iQvbFbrgiYG L+S23tlcDn7ylU55cTLxsG+lUeVOagnpyRXpCJjHrD+CmJgyHnQryuaishU4nl3VSkDIpJ5i776Tz s2nEBri1AwpbFurYa7cbEXG735ogRhdqEPHD8ycxczS5jAMeu+SY3G+G+9EkMkkM3Y+oHnngdj8y4 H9xx1Qme5Xy6y0QuPdlA==; 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 1j2HDW-0006yZ-KF; Thu, 13 Feb 2020 16:19:54 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1j2HAy-0004Fm-Cu for linux-arm-kernel@lists.infradead.org; Thu, 13 Feb 2020 16:17:18 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id E53EB106F; Thu, 13 Feb 2020 08:17:15 -0800 (PST) Received: from e119884-lin.cambridge.arm.com (e119884-lin.cambridge.arm.com [10.1.196.72]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 5B2333F6CF; Thu, 13 Feb 2020 08:17:13 -0800 (PST) From: Vincenzo Frascino To: linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, clang-built-linux@googlegroups.com, x86@kernel.org Subject: [PATCH 12/19] arm64: Introduce asm/common/processor.h Date: Thu, 13 Feb 2020 16:16:07 +0000 Message-Id: <20200213161614.23246-13-vincenzo.frascino@arm.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200213161614.23246-1-vincenzo.frascino@arm.com> References: <20200213161614.23246-1-vincenzo.frascino@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200213_081716_607811_9226C91A X-CRM114-Status: GOOD ( 13.10 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [217.140.110.172 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ndesaulniers@google.com, 0x7f454c46@gmail.com, avagin@openvz.org, arnd@arndb.de, sboyd@kernel.org, catalin.marinas@arm.com, will.deacon@arm.com, linux@armlinux.org.uk, salyzyn@android.com, paul.burton@mips.com, mingo@redhat.com, bp@alien8.de, luto@kernel.org, tglx@linutronix.de, pcc@google.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org The vDSO library should only include the necessary headers required for a userspace library (UAPI and a minimal set of kernel headers). To make this possible it is necessary to isolate from the kernel headers the common parts that are strictly necessary to build the library. Introduce asm/common/processor.h to contain all the arm64 specific functions that are suitable for vDSO inclusion. Cc: Catalin Marinas Cc: Will Deacon Signed-off-by: Vincenzo Frascino --- arch/arm64/include/asm/common/processor.h | 31 +++++++++++++++++++++++ arch/arm64/include/asm/processor.h | 16 ++---------- 2 files changed, 33 insertions(+), 14 deletions(-) create mode 100644 arch/arm64/include/asm/common/processor.h diff --git a/arch/arm64/include/asm/common/processor.h b/arch/arm64/include/asm/common/processor.h new file mode 100644 index 000000000000..d02b0f392923 --- /dev/null +++ b/arch/arm64/include/asm/common/processor.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2020 ARM Ltd. + */ +#ifndef __ASM_COMMON_PROCESSOR_H +#define __ASM_COMMON_PROCESSOR_H + +#ifndef __ASSEMBLY__ + +#include + +#ifdef CONFIG_COMPAT +#if defined(CONFIG_ARM64_64K_PAGES) && defined(CONFIG_KUSER_HELPERS) +/* + * With CONFIG_ARM64_64K_PAGES enabled, the last page is occupied + * by the compat vectors page. + */ +#define TASK_SIZE_32 UL(0x100000000) +#else +#define TASK_SIZE_32 (UL(0x100000000) - PAGE_SIZE) +#endif /* CONFIG_ARM64_64K_PAGES */ +#endif /* CONFIG_COMPAT */ + +static inline void cpu_relax(void) +{ + asm volatile("yield" ::: "memory"); +} + +#endif /* __ASSEMBLY__ */ + +#endif /* __ASM_COMMON_PROCESSOR_H */ diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h index 5ba63204d078..2866afc33f24 100644 --- a/arch/arm64/include/asm/processor.h +++ b/arch/arm64/include/asm/processor.h @@ -28,6 +28,8 @@ #include #include +#include + #include #include #include @@ -47,15 +49,6 @@ #define TASK_SIZE_64 (UL(1) << vabits_actual) #ifdef CONFIG_COMPAT -#if defined(CONFIG_ARM64_64K_PAGES) && defined(CONFIG_KUSER_HELPERS) -/* - * With CONFIG_ARM64_64K_PAGES enabled, the last page is occupied - * by the compat vectors page. - */ -#define TASK_SIZE_32 UL(0x100000000) -#else -#define TASK_SIZE_32 (UL(0x100000000) - PAGE_SIZE) -#endif /* CONFIG_ARM64_64K_PAGES */ #define TASK_SIZE (test_thread_flag(TIF_32BIT) ? \ TASK_SIZE_32 : TASK_SIZE_64) #define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk, TIF_32BIT) ? \ @@ -256,11 +249,6 @@ extern void release_thread(struct task_struct *); unsigned long get_wchan(struct task_struct *p); -static inline void cpu_relax(void) -{ - asm volatile("yield" ::: "memory"); -} - /* Thread switching */ extern struct task_struct *cpu_switch_to(struct task_struct *prev, struct task_struct *next);