From patchwork Fri Jun 22 20:32:19 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aaron Lindsay X-Patchwork-Id: 10482995 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 6AD4C6023A for ; Fri, 22 Jun 2018 20:34:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5E16C28F4C for ; Fri, 22 Jun 2018 20:34:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5244628F52; Fri, 22 Jun 2018 20:34:38 +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=-7.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI, T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id EC28128F4C for ; Fri, 22 Jun 2018 20:34:37 +0000 (UTC) Received: from localhost ([::1]:36074 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fWSlR-0003XL-5P for patchwork-qemu-devel@patchwork.kernel.org; Fri, 22 Jun 2018 16:34:37 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54308) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fWSjd-000290-8T for qemu-devel@nongnu.org; Fri, 22 Jun 2018 16:32:48 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fWSjc-0005Sc-Ba for qemu-devel@nongnu.org; Fri, 22 Jun 2018 16:32:45 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:45422) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fWSja-0005Q3-1d; Fri, 22 Jun 2018 16:32:42 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 16C3A60B14; Fri, 22 Jun 2018 20:32:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1529699561; bh=KJ2hwWBPFbAMSD5tXendsVzPlgncIxTq0scY54lmlJU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BT5DXuQTqjQ1qBijXx9CIDIrsKERZ/WLZNV7Yx69uvGoMRot8LzWmW0jrnbc3zumF HCGjN5F9NYALT2RelrhufUIpgIkC2B0V/T8oKlRRuOIHZWA4bQ4kXku8byJZe6+WzM KHIxyf61W4Y9GzN50vTgUd0k4mWx0cgOJBfQ4Ce4= Received: from mossypile.qualcomm.com (global_nat1_iad_fw.qualcomm.com [129.46.232.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: alindsay@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 7296A6081B; Fri, 22 Jun 2018 20:32:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1529699560; bh=KJ2hwWBPFbAMSD5tXendsVzPlgncIxTq0scY54lmlJU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AZcy8odI1D550YZAVgjsc1NwqWpylzEo3a/QaB6L+8DFzjrkJH3IkY3fcQETLCdeq LAejTkAidX0o00bRRGzGRrq5blUqu5bcE8qroXDxgYsHnf7HldyYlTw4bvSa7Kfz21 EQ8tjuA93EOSCKN/77PKuoX+heicXIu7rGSfgHv4= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 7296A6081B Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=alindsay@codeaurora.org From: Aaron Lindsay To: qemu-arm@nongnu.org, Peter Maydell , Alistair Francis , Wei Huang , Peter Crosthwaite Date: Fri, 22 Jun 2018 16:32:19 -0400 Message-Id: <1529699547-17044-6-git-send-email-alindsay@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1529699547-17044-1-git-send-email-alindsay@codeaurora.org> References: <1529699547-17044-1-git-send-email-alindsay@codeaurora.org> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 198.145.29.96 Subject: [Qemu-devel] [PATCH v5 05/13] target/arm: Remove redundant DIV detection for KVM X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Aaron Lindsay , Michael Spradling , qemu-devel@nongnu.org, Digant Desai Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP KVM implies V7VE, which implies ARM_DIV and THUMB_DIV. The conditional detection here is therefore unnecessary. Because V7VE is already unconditionally specified for all KVM hosts, ARM_DIV and THUMB_DIV are already indirectly specified and do not need to be included here at all. Signed-off-by: Aaron Lindsay Reviewed-by: Peter Maydell --- target/arm/kvm32.c | 19 +------------------ 1 file changed, 1 insertion(+), 18 deletions(-) diff --git a/target/arm/kvm32.c b/target/arm/kvm32.c index fb9ea37..4e91c11 100644 --- a/target/arm/kvm32.c +++ b/target/arm/kvm32.c @@ -36,7 +36,7 @@ bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf) * and then query that CPU for the relevant ID registers. */ int i, ret, fdarray[3]; - uint32_t midr, id_pfr0, id_isar0, mvfr1; + uint32_t midr, id_pfr0, mvfr1; uint64_t features = 0; /* Old kernels may not know about the PREFERRED_TARGET ioctl: however * we know these will only support creating one kind of guest CPU, @@ -60,11 +60,6 @@ bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf) }, { .id = KVM_REG_ARM | KVM_REG_SIZE_U32 - | ENCODE_CP_REG(15, 0, 0, 0, 2, 0, 0), - .addr = (uintptr_t)&id_isar0, - }, - { - .id = KVM_REG_ARM | KVM_REG_SIZE_U32 | KVM_REG_ARM_VFP | KVM_REG_ARM_VFP_MVFR1, .addr = (uintptr_t)&mvfr1, }, @@ -106,18 +101,6 @@ bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf) set_feature(&features, ARM_FEATURE_VFP3); set_feature(&features, ARM_FEATURE_GENERIC_TIMER); - switch (extract32(id_isar0, 24, 4)) { - case 1: - set_feature(&features, ARM_FEATURE_THUMB_DIV); - break; - case 2: - set_feature(&features, ARM_FEATURE_ARM_DIV); - set_feature(&features, ARM_FEATURE_THUMB_DIV); - break; - default: - break; - } - if (extract32(id_pfr0, 12, 4) == 1) { set_feature(&features, ARM_FEATURE_THUMB2EE); }