From patchwork Tue Aug 18 04:18:59 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: David Gibson X-Patchwork-Id: 11719907 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 350FD739 for ; Tue, 18 Aug 2020 04:27:06 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 0CA4D207BB for ; Tue, 18 Aug 2020 04:27:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=gibson.dropbear.id.au header.i=@gibson.dropbear.id.au header.b="e+G3uBtK" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0CA4D207BB Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=gibson.dropbear.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:58830 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k7tDF-0004vQ-7C for patchwork-qemu-devel@patchwork.kernel.org; Tue, 18 Aug 2020 00:27:05 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50036) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k7t6C-0007XG-Fi; Tue, 18 Aug 2020 00:19:48 -0400 Received: from bilbo.ozlabs.org ([2401:3900:2:1::2]:38309 helo=ozlabs.org) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k7t6A-0006Mv-Rg; Tue, 18 Aug 2020 00:19:48 -0400 Received: by ozlabs.org (Postfix, from userid 1007) id 4BVyNb72Pfz9sVR; Tue, 18 Aug 2020 14:19:27 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1597724367; bh=K0+7r8i73nDpRDqs5tcp1Ji9n1M/AGHGHH0KokPDWwU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=e+G3uBtKwKOde6DKxoXugykpiqd395PVcVj+gYd5cE5MDsCnSEmzcl6JyGxDPLdb7 0mYj30LentksR5TPfY88W+Wuqa0mM3ysPUogFAmz/gI2vuEyyofGahKyUvA2Z0yrfA psCDDrIdfzCiuTdSkHv7WYdMdcFy387g8FcrqtWs= From: David Gibson To: peter.maydell@linaro.org, groug@kaod.org Subject: [PULL 17/40] docs: Update POWER9 XIVE support for nested guests Date: Tue, 18 Aug 2020 14:18:59 +1000 Message-Id: <20200818041922.251708-18-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200818041922.251708-1-david@gibson.dropbear.id.au> References: <20200818041922.251708-1-david@gibson.dropbear.id.au> MIME-Version: 1.0 Received-SPF: pass client-ip=2401:3900:2:1::2; envelope-from=dgibson@ozlabs.org; helo=ozlabs.org X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -9 X-Spam_score: -1.0 X-Spam_bar: - X-Spam_report: (-1.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: David Gibson , qemu-ppc@nongnu.org, qemu-devel@nongnu.org, =?utf-8?q?C=C3=A9dric_Le_Goater?= Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" From: Cédric Le Goater It is not yet supported. Signed-off-by: Cédric Le Goater Message-Id: <20200804131639.407049-1-clg@kaod.org> Signed-off-by: David Gibson --- docs/specs/ppc-spapr-xive.rst | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/docs/specs/ppc-spapr-xive.rst b/docs/specs/ppc-spapr-xive.rst index 6159bc6eed..7199db730b 100644 --- a/docs/specs/ppc-spapr-xive.rst +++ b/docs/specs/ppc-spapr-xive.rst @@ -61,6 +61,11 @@ depend on the XIVE KVM capability of the host. On older kernels without XIVE KVM support, QEMU will use the emulated XIVE device as a fallback and on newer kernels (>=5.2), the KVM XIVE device. +XIVE native exploitation mode is not supported for KVM nested guests, +VMs running under a L1 hypervisor (KVM on pSeries). In that case, the +hypervisor will not advertise the KVM capability and QEMU will use the +emulated XIVE device, same as for older versions of KVM. + As a final refinement, the user can also switch the use of the KVM device with the machine option ``kernel_irqchip``.