From patchwork Thu Feb 13 16:16:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincenzo Frascino X-Patchwork-Id: 11380779 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 25C5392A for ; Thu, 13 Feb 2020 16:21:11 +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 DD9142082F for ; Thu, 13 Feb 2020 16:21:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="f+Y9LCso" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DD9142082F 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=3GV6fKs/dGK8OOHYf4h47HoU0tW5fgdd8VPaGZSyET0=; b=f+Y9LCsoFYLGvN 70x3USPGqz0MtyyiqHVcJgv/MWCc46qpgZlj98ZE7a3niWYyXkxLXJTVV0W7WQNKnTplAwoLNI3NI cJ5Fu6kSQ4m/1iYI7K0OPJebLTW7pLsCMuZGhu3DNr8LNABe+0Nm/kcFnQOspHuMO+XcWkI7KLl2/ 34JeRElbufWHDfOYIOV8nLTrLGd5YJXimTjAW76FbyXqLH8rS0Uhuk3f7+lzVmeVAgsFShdKyVeEx n2hbMGBYDiXOa9KXnv2sTfvcMj0Z+fUFkfQx9GbfDbgLYlNi6JV+i61D3UR2R/PrJpGA2DOtwwiN1 s7pmOiSQnP7hwGq6WdaQ==; 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 1j2HEf-0000if-Iy; Thu, 13 Feb 2020 16:21:05 +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 1j2HB9-0004QM-M2 for linux-arm-kernel@lists.infradead.org; Thu, 13 Feb 2020 16:17:29 +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 E21A9328; Thu, 13 Feb 2020 08:17:26 -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 5F9E03F6CF; Thu, 13 Feb 2020 08:17:24 -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 16/19] x86: vdso: Enable x86 to use common headers Date: Thu, 13 Feb 2020 16:16:11 +0000 Message-Id: <20200213161614.23246-17-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_081727_923471_FE89932B X-CRM114-Status: GOOD ( 12.96 ) 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 Enable x86 to use only the common headers in the implementation of the vDSO library. Cc: Thomas Gleixner Cc: Andy Lutomirski Cc: Ingo Molnar Cc: Borislav Petkov Signed-off-by: Vincenzo Frascino --- arch/x86/include/asm/common/processor.h | 23 +++++++++++++++++++++++ arch/x86/include/asm/processor.h | 12 +----------- 2 files changed, 24 insertions(+), 11 deletions(-) create mode 100644 arch/x86/include/asm/common/processor.h diff --git a/arch/x86/include/asm/common/processor.h b/arch/x86/include/asm/common/processor.h new file mode 100644 index 000000000000..60ca2ee6e672 --- /dev/null +++ b/arch/x86/include/asm/common/processor.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2020 ARM Ltd. + */ +#ifndef __ASM_COMMON_PROCESSOR_H +#define __ASM_COMMON_PROCESSOR_H + +#ifndef __ASSEMBLY__ + +/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */ +static __always_inline void rep_nop(void) +{ + asm volatile("rep; nop" ::: "memory"); +} + +static __always_inline void cpu_relax(void) +{ + rep_nop(); +} + +#endif /* __ASSEMBLY__ */ + +#endif /* __ASM_COMMON_PROCESSOR_H */ diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index 09705ccc393c..d66c5dd42cff 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -26,6 +26,7 @@ struct vm86; #include #include #include +#include #include #include @@ -677,17 +678,6 @@ static inline unsigned int cpuid_edx(unsigned int op) return edx; } -/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */ -static __always_inline void rep_nop(void) -{ - asm volatile("rep; nop" ::: "memory"); -} - -static __always_inline void cpu_relax(void) -{ - rep_nop(); -} - /* * This function forces the icache and prefetched instruction stream to * catch up with reality in two very specific cases: