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Donenfeld" X-Patchwork-Id: 10623733 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0C104174E for ; Tue, 2 Oct 2018 13:38:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0A8C0289F6 for ; Tue, 2 Oct 2018 13:38:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F2FF0289FA; Tue, 2 Oct 2018 13:38:31 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 4B5AC289F6 for ; Tue, 2 Oct 2018 13:38:31 +0000 (UTC) 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=xd8T3KmiA4t9LAc/Cgb5do8RIq6vxnmJpgjSmJYZppI=; b=WbcGT3+8BkKrbg que1DazUIh9GzunbQmKiJpVKs+It/0G/yw+AOWpjJ57qWLQodpPDe4A3Q4eTThZHJRvU/YRirXkJc j2slJXl5lvdqhVqHLbVY628qVBPcih5p1PLlMOe4SDhywHxjCTUx5ztHvbR/WMjV5yvAWaxRH6Z58 ++tiKV3F7e7dwbIfPyQGbQkvyJrFsORXp9LWmHzVvzVk+UL+btKhZzd7G6PP7FRCNXFDkIfHmfcZV tjsQ+wLPYiEQLIBS0QiBoP6SLgaI+WaWkuPNCoTp/diAKYJ5sNoe5k+dcO3pDNvcOi6vQOJIntXu1 Kt5thlfrrUOSKGqXHOSQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1g7Ksd-0004Jh-54; Tue, 02 Oct 2018 13:38:27 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1g7Knj-0000c4-9u for linux-arm-kernel@bombadil.infradead.org; Tue, 02 Oct 2018 13:33:23 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=GdlyHerFxCk82luNPnnlblL3+FEFBfSA1SlCWT6tztA=; b=Ssz4VdiBpsnnWiPzwTjS2u9PT7 ylx/hnNKRXlMZFkYL+2zWFJGhF+2OZUx8YnaUWPbz3VjZuzN7C/aHscDG0v6ed04d58hAsHPtwlVF YLl9WvqLPhk1AohCjnQoqqkxJEDFEkfWuCwEs42mQybJYmE33QPgLzXDtgRkJZrTqiANvrXwzFp7H OC3LYZJzPvqrcaXUStaj6WTl+JWxWOYdleYHlOYU+Tm37jyyBuf6D4s5KsmJu22lMGBikq3VcySsq bF5rGD2stzwqAyEw6sW/fK3m/Ybsroe3/aM+akA1qMth4nFe3YDcz8KeXjlJl2yjmh8K3MYE4pK7F XGMLq0Sg==; Received: from frisell.zx2c4.com ([192.95.5.64]) by casper.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1g7Kcu-000404-PB for linux-arm-kernel@lists.infradead.org; Tue, 02 Oct 2018 13:22:14 +0000 Received: by frisell.zx2c4.com (ZX2C4 Mail Server) with ESMTP id ad258704; Tue, 2 Oct 2018 13:21:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=zx2c4.com; h=from:to:cc :subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; s=mail; bh=Voc8RVmCGbPhiVACpG+UGUo1e yc=; b=CXfCdOhaXhhU1vVyRPEs25Yf/oStWjiTLd8N3TKcKNcEo+SkLIg6TufIW Ij3rSBBDp8gUqeqLWnfaTO5JYMFnqsPEEs3Qj8GqGjugI7D73gMbXawFcEHxx8JC SyaqwVJnolgT3QVCTZ9uZMrS4/RRK0xeDUsAlk16IZofPsKA7C7UKUGLXe5xviFw d4V4QFQ4XW3rgl9vNxogEpdhW2C3jfhr106D4wXKe2D5aICBZooNfLFD+g7o6WPd ezGsG7LzvV1LuJgYESnILlXsVz7Yn4eNtLzB5XVXFn3gpXh1glHXHsd8k0fRX23M 6gEOHi1wnFvR0xc9L/4boTuy5Yc9Q== Received: by frisell.zx2c4.com (ZX2C4 Mail Server) with ESMTPSA id c6656ade (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256:NO); Tue, 2 Oct 2018 13:21:52 +0000 (UTC) From: "Jason A. Donenfeld" To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, arm@kernel.org Subject: [PATCH] ARM: makefile: use ARMv3M mode for RiscPC Date: Tue, 2 Oct 2018 15:20:26 +0200 Message-Id: <20181002132026.14931-1-Jason@zx2c4.com> In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181002_142212_891161_0B593FC3 X-CRM114-Status: GOOD ( 15.32 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Jason A. Donenfeld" , Russell King , Arnd Bergmann , Ard Biesheuvel Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The purpose of CONFIG_CPU_32v3 is to avoid ldrh/strh on the RiscPC, which is pretty much an ARMv4 device, except its bus will choke on the half-words. The way to make the C compiler not output ldrh/strh is with -march=armv3, which doesn't support them in the ISA. However, this prevents certain cryptography code from working that uses instructions like umull. Fortunately there's also -march=armv3m that does support those, making it possible to continue assembling optimized cryptography routines for our beloved RiscPC. Signed-off-by: Jason A. Donenfeld Cc: Ard Biesheuvel Cc: Russell King Cc: Arnd Bergmann --- arch/arm/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/Makefile b/arch/arm/Makefile index d1516f85f25d..7fd4bcaf0721 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -74,7 +74,7 @@ endif arch-$(CONFIG_CPU_32v5) =-D__LINUX_ARM_ARCH__=5 $(call cc-option,-march=armv5te,-march=armv4t) arch-$(CONFIG_CPU_32v4T) =-D__LINUX_ARM_ARCH__=4 -march=armv4t arch-$(CONFIG_CPU_32v4) =-D__LINUX_ARM_ARCH__=4 -march=armv4 -arch-$(CONFIG_CPU_32v3) =-D__LINUX_ARM_ARCH__=3 -march=armv3 +arch-$(CONFIG_CPU_32v3) =-D__LINUX_ARM_ARCH__=3 -march=armv3m # Evaluate arch cc-option calls now arch-y := $(arch-y)