From patchwork Thu Mar 26 09:26:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miroslav Benes X-Patchwork-Id: 11459735 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9C9B281 for ; Thu, 26 Mar 2020 09:27:02 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 839F120719 for ; Thu, 26 Mar 2020 09:27:02 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 839F120719 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.cz Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1jHOm9-0007JK-PX; Thu, 26 Mar 2020 09:26:09 +0000 Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1jHOm7-0007J1-Rx for xen-devel@lists.xenproject.org; Thu, 26 Mar 2020 09:26:07 +0000 X-Inumbo-ID: d217598c-6f43-11ea-8783-12813bfff9fa Received: from mx2.suse.de (unknown [195.135.220.15]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id d217598c-6f43-11ea-8783-12813bfff9fa; Thu, 26 Mar 2020 09:26:07 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id C6AE8AC5F; Thu, 26 Mar 2020 09:26:05 +0000 (UTC) From: Miroslav Benes To: boris.ostrovsky@oracle.com, jgross@suse.com, sstabellini@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, jpoimboe@redhat.com Date: Thu, 26 Mar 2020 10:26:01 +0100 Message-Id: <20200326092603.7230-1-mbenes@suse.cz> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Subject: [Xen-devel] [PATCH v3 0/2] x86/xen: Make idle tasks reliable X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: andrew.cooper3@citrix.com, x86@kernel.org, linux-kernel@vger.kernel.org, jbeulich@suse.com, live-patching@vger.kernel.org, xen-devel@lists.xenproject.org, Miroslav Benes , jslaby@suse.cz Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" The unwinder reports idle tasks' stack on XEN PV as unreliable which complicates things for at least live patching. The two patches in the series try to amend that by using similar approach as non-XEN x86 does. v2->v3: - change prototype of asm_cpu_bringup_and_idle() - replace %_ASM_SP with %rsp and %esp respectively - fix build for !CONFIG_XEN_PV_SMP v1->v2: - call instruction used instead of push+jmp - initial_stack used directly v1 https://lore.kernel.org/live-patching/20200312142007.11488-1-mbenes@suse.cz/ v2 https://lore.kernel.org/live-patching/20200319095606.23627-1-mbenes@suse.cz/ Miroslav Benes (2): x86/xen: Make the boot CPU idle task reliable x86/xen: Make the secondary CPU idle tasks reliable arch/x86/xen/smp_pv.c | 3 ++- arch/x86/xen/xen-head.S | 18 ++++++++++++++++-- 2 files changed, 18 insertions(+), 3 deletions(-)