From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933245AbcHDJQm (ORCPT ); Thu, 4 Aug 2016 05:16:42 -0400 Received: from smtp.nue.novell.com ([195.135.221.5]:35263 "EHLO smtp.nue.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932848AbcHDJQE (ORCPT ); Thu, 4 Aug 2016 05:16:04 -0400 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 Cc: suzuki.poulose@arm.com, james.morse@arm.com, david.daney@cavium.com, rrichter@cavium.com, agraf@suse.de, mbrugger@suse.com, mark.rutland@arm.com, lorenzo.pieralisi@arm.com, dave.long@linaro.org, ard.biesheuvel@linaro.org, zlim.lnx@gmail.com, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org Subject: [PATCH 4/4] arm64: hibernate: Check for broadcast TLBI support Date: Thu, 4 Aug 2016 11:15:17 +0200 Message-Id: <1470302117-32296-5-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> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hibernation makes use of broadcast TLBI. Error out early when this is not supported by the hardware. Signed-off-by: Matthias Brugger --- arch/arm64/kernel/hibernate.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm64/kernel/hibernate.c b/arch/arm64/kernel/hibernate.c index 21ab5df..7269642 100644 --- a/arch/arm64/kernel/hibernate.c +++ b/arch/arm64/kernel/hibernate.c @@ -481,6 +481,11 @@ static int check_boot_cpu_online_pm_callback(struct notifier_block *nb, static int __init check_boot_cpu_online_init(void) { + if (cpus_have_cap(ARM64_HAS_NO_BCAST_TLBI)) { + pr_err("Can't hibernate: missing broadcast TLBI support.\n"); + return -EINVAL; + } + /* * Set this pm_notifier callback with a lower priority than * cpu_hotplug_pm_callback, so that cpu_hotplug_pm_callback will be -- 2.6.6