From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=BAYES_00,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 865F8C433DB for ; Wed, 17 Feb 2021 22:11:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5426664E2E for ; Wed, 17 Feb 2021 22:11:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230292AbhBQWLm (ORCPT ); Wed, 17 Feb 2021 17:11:42 -0500 Received: from mail.kernel.org ([198.145.29.99]:59854 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229707AbhBQWLh (ORCPT ); Wed, 17 Feb 2021 17:11:37 -0500 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 70ADC64D7F; Wed, 17 Feb 2021 22:10:56 +0000 (UTC) Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=wait-a-minute.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94) (envelope-from ) id 1lCV26-00EfZ7-9Y; Wed, 17 Feb 2021 22:10:54 +0000 Date: Wed, 17 Feb 2021 22:10:53 +0000 Message-ID: <87blcis5ua.wl-maz@kernel.org> From: Marc Zyngier To: Haibo Xu Cc: arm-mail-list , kvmarm , kvm@vger.kernel.org, kernel-team@android.com, Andre Przywara Subject: Re: [PATCH v3 00/66] KVM: arm64: ARMv8.3/8.4 Nested Virtualization support In-Reply-To: References: <20201210160002.1407373-1-maz@kernel.org> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/27.1 (x86_64-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: haibo.xu@linaro.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, kernel-team@android.com, andre.przywara@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Thu, 04 Feb 2021 07:51:37 +0000, Haibo Xu wrote: > > Kindly ping! > > On Thu, 21 Jan 2021 at 11:03, Haibo Xu wrote: > > > > Re-send in case the previous email was blocked for the inlined hyper-link. > > > > Hi Marc, > > > > I have tried to enable the NV support in Qemu, and now I can > > successfully boot a L2 guest > > in Qemu KVM mode. > > > > This patch series looks good from the Qemu side except for two minor > > requirements: > > (1) Qemu will check whether a feature was supported by the KVM cap > > when the user tries to enable it in the command line, so a new > > capability was prefered for the NV(KVM_CAP_ARM_NV?). I have added KVM_CAP_ARM_EL2 (rather than NV) to that effect. > > (2) According to the Documentation/virt/kvm/api.rst, userspace can > > call KVM_ARM_VCPU_INIT multiple times for a given vcpu, but the > > kvm_vcpu_init_nested() do have some issue when called multiple > > times(please refer to the detailed comments in patch 63) This is now fixed, I believe. I have pushed out a branch [1] that addresses all the reported issues, though it currently lack some testing. Please let me know if it works for you. Thanks, M. [1] https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git/log/?h=kvm-arm64/nv-5.12-WIP -- Without deviation from the norm, progress is not possible.