From patchwork Thu Aug 4 09:15:16 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthias Brugger X-Patchwork-Id: 9263097 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 47F666048F for ; Thu, 4 Aug 2016 09:18:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3907328333 for ; Thu, 4 Aug 2016 09:18:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2D8B428384; Thu, 4 Aug 2016 09:18:55 +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=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id E1A1128333 for ; Thu, 4 Aug 2016 09:18:54 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bVEmN-0001RR-Sn; Thu, 04 Aug 2016 09:17:27 +0000 Received: from smtp.nue.novell.com ([195.135.221.5]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bVElJ-0000R8-KT for linux-arm-kernel@lists.infradead.org; Thu, 04 Aug 2016 09:16:48 +0000 Received: from nwb-ext-pat.microfocus.com ([10.120.13.103]) by smtp.nue.novell.com with ESMTP (TLS encrypted); Thu, 04 Aug 2016 11:15:59 +0200 Received: from linux-gy6r.site (nwb-a10-snat.microfocus.com [10.120.13.201]) by nwb-ext-pat.microfocus.com with ESMTP (TLS encrypted); Thu, 04 Aug 2016 10:15:36 +0100 From: Matthias Brugger To: pbonzini@redhat.com, rkrcmar@redhat.com, christoffer.dall@linaro.org, marc.zyngier@arm.com, linux@armlinux.org.uk, catalin.marinas@arm.com, will.deacon@arm.com Subject: [PATCH 3/4] KVM: arm/arm64: Check for broadcast TLBI support Date: Thu, 4 Aug 2016 11:15:16 +0200 Message-Id: <1470302117-32296-4-git-send-email-mbrugger@suse.com> X-Mailer: git-send-email 2.6.6 In-Reply-To: <1470302117-32296-1-git-send-email-mbrugger@suse.com> References: <1470302117-32296-1-git-send-email-mbrugger@suse.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160804_021622_615706_CD73FB1D X-CRM114-Status: UNSURE ( 6.88 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, mbrugger@suse.com, kvm@vger.kernel.org, david.daney@cavium.com, ard.biesheuvel@linaro.org, zlim.lnx@gmail.com, suzuki.poulose@arm.com, agraf@suse.de, linux-kernel@vger.kernel.org, rrichter@cavium.com, lorenzo.pieralisi@arm.com, james.morse@arm.com, dave.long@linaro.org, kvmarm@lists.cs.columbia.edu, 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 KVM awaits a working broadcast TLBI implementation. Error out early when this is not provided by the hardware. Signed-off-by: Matthias Brugger --- arch/arm/kvm/arm.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c index f1bde7c..e627fac 100644 --- a/arch/arm/kvm/arm.c +++ b/arch/arm/kvm/arm.c @@ -1376,6 +1376,11 @@ int kvm_arch_init(void *opaque) int err; int ret, cpu; + if (cpus_have_cap(ARM64_HAS_NO_BCAST_TLBI)) { + kvm_err("Missing broadcast TLBI support.\n"); + return -ENODEV; + } + if (!is_hyp_mode_available()) { kvm_err("HYP mode not available\n"); return -ENODEV;