From patchwork Fri Mar 29 13:00:50 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Martin X-Patchwork-Id: 10877055 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 0B4071669 for ; Fri, 29 Mar 2019 13:18:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E673328F37 for ; Fri, 29 Mar 2019 13:18:27 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D9F8128F71; Fri, 29 Mar 2019 13:18:27 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED 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 661E228FA8 for ; Fri, 29 Mar 2019 13:18:27 +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=xSj65WU3+W38D2l//U1ynhtH5qotd2tDst62BDJBf9M=; b=gbENSKrdd0wq00pLtqrf2jmFst nPPPKkwQsh+V88L1B4E42btcrlsZadYN5v2N05R9TxV2FyJTQN4y0jg8HxGPw0bJqjyfx3HPTRg2S wACqGfpzBTjuYwMHgwk51C3MfWy5Yd8349csuOtEvGFSTtLHQtfBuo1c6RlbKXyaa/6b1uMvBezOW iN+kQsj4TRKH3nXQnGfExNztyVvzrXTs7u1j+MPQynSB3z48Z0lSKlNwRepr5K6vyDzquLvGuY+af EAiCxtM0enwh4ySthpV0HJBiADd3a7zCsqByEcnCeQKOnF5W09T6w0o8mWsNlvzckWyhZ74rXRRBE tApr230Q==; 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 1h9rOr-000554-Gd; Fri, 29 Mar 2019 13:18:25 +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 1h9rOe-0004j1-7N for linux-arm-kernel@bombadil.infradead.org; Fri, 29 Mar 2019 13:18:12 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.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=6ESu5vEvckZWF7/KdWhwvEHmjDGciD5DaedJm0xwc7E=; b=iySgNOY1udPvlz4zJtZmAlz+O 4gGfhqQxAFcKrACzfbxeZZ4CMwIoxudI5DcWjvudmNPEq80xF3qRaPnBYoml62oV/73FGiylgcFYT nFXxxOMH8xPuidmAHHoKoFrHTrBornai5jdbMBbDQhV79y+7l8WyyhH7OCU2Yz9OitWT9DK8D3Vs6 8humHCAGht9uVusN1RZDoM/e5sdN1ju1kaODDU7avtl1jBjx2Sl0YI19yo+Chqk9SnzrvK021jpyq dIWXU47jW1bxpMjDDE1++kCB0U+GvYN9n7N9dOaFBgnw5uLIq4olv9LARzgr+ZXe/Ddpv/qYjvRJ0 L4pA9dp4Q==; Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by casper.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h9r9Y-0002if-Fq for linux-arm-kernel@lists.infradead.org; Fri, 29 Mar 2019 13:02:38 +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 3C5621688; Fri, 29 Mar 2019 06:02:36 -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 1F10E3F575; Fri, 29 Mar 2019 06:02:33 -0700 (PDT) From: Dave Martin To: kvmarm@lists.cs.columbia.edu Subject: [PATCH v7 25/27] KVM: arm64: Add a capability to advertise SVE support Date: Fri, 29 Mar 2019 13:00:50 +0000 Message-Id: <1553864452-15080-26-git-send-email-Dave.Martin@arm.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1553864452-15080-1-git-send-email-Dave.Martin@arm.com> References: <1553864452-15080-1-git-send-email-Dave.Martin@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190329_130236_709720_D05DC308 X-CRM114-Status: UNSURE ( 9.35 ) 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: Peter Maydell , Okamoto Takayuki , Christoffer Dall , Ard Biesheuvel , Marc Zyngier , Catalin Marinas , Will Deacon , Zhang Lei , Julien Grall , =?utf-8?q?Alex_Benn=C3=A9e?= , linux-arm-kernel@lists.infradead.org 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 To provide a uniform way to check for KVM SVE support amongst other features, this patch adds a suitable capability KVM_CAP_ARM_SVE, and reports it as present when SVE is available. Signed-off-by: Dave Martin Reviewed-by: Julien Thierry Tested-by: zhang.lei Reviewed-by: Andrew Jones --- Changes since v5: * [Julien Thierry] Strip out has_vhe() sanity-check, which wasn't in the most logical place, and anyway doesn't really belong in this patch. Moved to KVM: arm64/sve: Allow userspace to enable SVE for vcpus instead. --- arch/arm64/kvm/reset.c | 3 +++ include/uapi/linux/kvm.h | 1 + 2 files changed, 4 insertions(+) diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c index 32c5ac0..f13378d 100644 --- a/arch/arm64/kvm/reset.c +++ b/arch/arm64/kvm/reset.c @@ -98,6 +98,9 @@ int kvm_arch_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_ARM_VM_IPA_SIZE: r = kvm_ipa_limit; break; + case KVM_CAP_ARM_SVE: + r = system_supports_sve(); + break; default: r = 0; } diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index c3b8e7a..1d56444 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -988,6 +988,7 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_ARM_VM_IPA_SIZE 165 #define KVM_CAP_MANUAL_DIRTY_LOG_PROTECT 166 #define KVM_CAP_HYPERV_CPUID 167 +#define KVM_CAP_ARM_SVE 168 #ifdef KVM_CAP_IRQ_ROUTING