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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B6E03EB64D8 for ; Wed, 14 Jun 2023 16:16:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:Message-ID:References:In-Reply-To:Subject:Cc:To:From :Date:MIME-Version:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=+p/mWsemgp4rfTuTSx9NQjJfaMth3YYOAO/hTWgr+54=; b=HI1MshpsFBj0HOV+xtSd/rx3bY f+ZWTL0IkXmBQ5e4kgr+mbT2XSPLw5jdFShRaanyXADC2n1qK3AMuHnuG+ts2+LR0I/da9Db6Ih2j O/YtMI89lUIrNd8guBI4XHd4M1SEvw3HQeqTMW6H4XAwcKFebLFeXj6FeRGFbWAcKN2SlLSvuzHVw x/Arr+MPaa9UfIGYZbDAqrs2EtXdMpuGONHzxozc+khIsGPEiLJCgaiHTCbWSxyDtTKgRmZQxK7vo ckzOfzQb6ugT4kAD8XkyTxlVpuVVG1GWFJKSq/0JmaGMdoMne7h2EuFvZpnkF/KB9kL4aFpK2NPmG m5ckBteQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1q9TAJ-00CB9n-1s; Wed, 14 Jun 2023 16:16:11 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1q9TAH-00CB8f-0T for linux-arm-kernel@lists.infradead.org; Wed, 14 Jun 2023 16:16:10 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id A5D6363C38; Wed, 14 Jun 2023 16:16:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 096B2C433C0; Wed, 14 Jun 2023 16:16:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1686759368; bh=Ks4bJ0TA9BrpfxeV3RYH48Yuda10fqlRYYmTIBuBuCo=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=HXOPnP8S6xg5toWS4sF24QdreIb7t5QSXBu+BEueRUgQD0FePERQS92qJLcr5kBUU Ytlq+PbcMosjSQpd6YugPVlkiVeCDHY+UeJEoizlGFjNSxMFSk81JWJcfg2yyHl5U3 9/WBJzVfSZquZ+EgdX+nU7yIEx5jyccWr97GEXQtcnZrgBMmplzJ47830pAkSLTtcN KveEbbM0P9EFsP6EdAtbcEOYnoX3fR71kaIHxn/JhMSSSUfWtAJZNuHa1ufLvwaPdT IvjnihOHgkiF8RGKA5NIeRn1pwx6yefJyS+Ib8/RCxlWo6TLZ6hmTZlrFfuCU+bWOX mmhGjMNaEwgfA== Received: from disco-boy.misterjones.org ([217.182.43.188] helo=www.loen.fr) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1q9TAD-005NaV-M1; Wed, 14 Jun 2023 17:16:05 +0100 MIME-Version: 1.0 Date: Wed, 14 Jun 2023 17:16:05 +0100 From: Marc Zyngier To: Oliver Upton Cc: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Quentin Perret , Will Deacon , James Morse , Fuad Tabba , Suzuki K Poulose , Zenghui Yu Subject: Re: (subset) [PATCH v3 00/17] KVM: arm64: Allow using VHE in the nVHE hypervisor In-Reply-To: <168675651876.3255755.11650251411681563144.b4-ty@linux.dev> References: <20230609162200.2024064-1-maz@kernel.org> <168675651876.3255755.11650251411681563144.b4-ty@linux.dev> User-Agent: Roundcube Webmail/1.4.13 Message-ID: <7499530a98f6f9e9532f4cf72921a1ad@kernel.org> X-Sender: maz@kernel.org X-SA-Exim-Connect-IP: 217.182.43.188 X-SA-Exim-Rcpt-To: oliver.upton@linux.dev, kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, qperret@google.com, will@kernel.org, james.morse@arm.com, tabba@google.com, suzuki.poulose@arm.com, yuzenghui@huawei.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230614_091609_229598_7E4F7768 X-CRM114-Status: GOOD ( 13.25 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 2023-06-14 16:31, Oliver Upton wrote: > On Fri, 9 Jun 2023 17:21:43 +0100, Marc Zyngier wrote: >> KVM (on ARMv8.0) and pKVM (on all revisions of the architecture) use >> the split hypervisor model that makes the EL2 code more or less >> standalone. In the later case, we totally ignore the VHE mode and >> stick with the good old v8.0 EL2 setup. >> >> This is all good, but means that the EL2 code is limited in what it >> can do with its own address space. This series proposes to remove this >> limitation and to allow VHE to be used even with the split hypervisor >> model. This has some potential isolation benefits[1], and eventually >> allow systems that do not support HCR_EL2.E2H==0 to run pKVM. >> >> [...] > > I decided we should probably should have this in -next for a bit before > sending a pull request. We can shove any fixes on top as needed. Awesome, thanks. There's already one such fix on your way! Cheers, M. -- Jazz is not dead. It just smells funny... _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel