From patchwork Wed Mar 22 14:50:39 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Martin X-Patchwork-Id: 9639107 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id AF3DE601E9 for ; Wed, 22 Mar 2017 14:54:18 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A0D182846F for ; Wed, 22 Mar 2017 14:54:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9536828477; Wed, 22 Mar 2017 14:54:18 +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=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 08E202846F for ; Wed, 22 Mar 2017 14:54:18 +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:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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=EFW00uP6dvvShGdlg+qu/y9w56miaaUxGytvMzXnPbQ=; b=KDv56tCxBbaZSjheXudC/urEcV AWa7XfubrUID5GdTjuRTNNwwR5ZXjI7XFuNjGbzP0dHIkoD7CFhqZTzPdC0Bc7zdkcmWxrYt4NDMo GFm8jrSK41T/6RLoa1LDWgFMmxZoMBkMQBOEq957GxEti4/hiEiYh12/BeWw7tlrFHr73y4pWmSVU peU5yBNa3QTOLoO/odTBgwJCqR/FR0UWqdrBkc9QTp9XlxEqtxZ1NPqLcKm5Z7YhQPHrfjIZf537T 8bOAFwXKhcRDII02wU3h4m/EsaGFcuDqsrVxBxRc3TputXnPFOMybtoHu7RDUEoMG9bFeSWS3Q65O lECp4NvQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cqheP-0001YP-BB; Wed, 22 Mar 2017 14:54:13 +0000 Received: from merlin.infradead.org ([2001:4978:20e::2]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cqhck-0007mi-QG for linux-arm-kernel@bombadil.infradead.org; Wed, 22 Mar 2017 14:52:30 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=References:In-Reply-To:Message-Id:Date: Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding: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=4sR6JdFyHyY0Yzce+rva+Ebt7i4ehV5QssGeiemh38A=; b=lMvrp+JNei+mjO5+xfLmw0PBC fkMplEyZGn/nvjlQFOQVgmH7NhqhyphlfU1diuuv7x5pVqqhKAHYW/nyLd5Mr8lWXW/p3+sKfJz1R k4ZdR34DnEtyQf45pLMZmjgjvJPQYt8MWu39dwpn12MQNHQXecN+ekBFeL4Wt4CwIHa8lP2/1uecE AHr81Sv9mju8m85gYfm2GskUjL1WBcQNDYolIj1Tf3bAPkpKFhcMeCHDzdJOx5XHYY62WXyYYPXeH xq/ndaDwyzT86sM6eR7QdWRGNPd+Ns7e9grdPkX3Y4VWOvUOpdp7M9GNerVJVlpjB9wO1o8FO1w2V zIktWh8pw==; Received: from foss.arm.com ([217.140.101.70]) by merlin.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cqhcj-0006hO-2I for linux-arm-kernel@lists.infradead.org; Wed, 22 Mar 2017 14:52:29 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 88FCE15A2; Wed, 22 Mar 2017 07:52:08 -0700 (PDT) Received: from e103592.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id CF3313F575; Wed, 22 Mar 2017 07:52:06 -0700 (PDT) From: Dave Martin To: linux-arm-kernel@lists.infradead.org Subject: [RFC PATCH v2 09/41] arm64/sve: Boot-time feature detection and reporting Date: Wed, 22 Mar 2017 14:50:39 +0000 Message-Id: <1490194274-30569-10-git-send-email-Dave.Martin@arm.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1490194274-30569-1-git-send-email-Dave.Martin@arm.com> References: <1490194274-30569-1-git-send-email-Dave.Martin@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170322_105229_293902_3E910972 X-CRM114-Status: UNSURE ( 8.20 ) X-CRM114-Notice: Please train this message. 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: Florian Weimer , Ard Biesheuvel , Marc Zyngier , Catalin Marinas , Will Deacon , Szabolcs Nagy , Joseph Myers MIME-Version: 1.0 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 This patch adds feature detection for the ARM Scalable Vector Extension, and adds basic informative feature reporting via /proc/cpuinfo. Signed-off-by: Dave Martin --- arch/arm64/include/asm/sysreg.h | 1 + arch/arm64/include/uapi/asm/hwcap.h | 1 + arch/arm64/kernel/cpufeature.c | 3 +++ arch/arm64/kernel/cpuinfo.c | 1 + 4 files changed, 6 insertions(+) diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h index ac24b6e..8f1a43e 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -157,6 +157,7 @@ #define ID_AA64ISAR0_AES_SHIFT 4 /* id_aa64pfr0 */ +#define ID_AA64PFR0_SVE_SHIFT 32 #define ID_AA64PFR0_GIC_SHIFT 24 #define ID_AA64PFR0_ASIMD_SHIFT 20 #define ID_AA64PFR0_FP_SHIFT 16 diff --git a/arch/arm64/include/uapi/asm/hwcap.h b/arch/arm64/include/uapi/asm/hwcap.h index 61c263c..7f0f86d 100644 --- a/arch/arm64/include/uapi/asm/hwcap.h +++ b/arch/arm64/include/uapi/asm/hwcap.h @@ -32,5 +32,6 @@ #define HWCAP_ASIMDHP (1 << 10) #define HWCAP_CPUID (1 << 11) #define HWCAP_ASIMDRDM (1 << 12) +#define HWCAP_SVE (1 << 13) #endif /* _UAPI__ASM_HWCAP_H */ diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index abda8e8..707dfdb 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -888,6 +888,9 @@ static const struct arm64_cpu_capabilities arm64_elf_hwcaps[] = { HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_FP_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, HWCAP_FPHP), HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_ASIMD_SHIFT, FTR_SIGNED, 0, CAP_HWCAP, HWCAP_ASIMD), HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_ASIMD_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, HWCAP_ASIMDHP), +#ifdef CONFIG_ARM64_SVE + HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_SVE_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_SVE), +#endif {}, }; diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c index 5b22c68..8dd410e 100644 --- a/arch/arm64/kernel/cpuinfo.c +++ b/arch/arm64/kernel/cpuinfo.c @@ -65,6 +65,7 @@ static const char *const hwcap_str[] = { "asimdhp", "cpuid", "asimdrdm", + "sve", NULL };