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[209.51.188.17]) by mx.google.com with ESMTPS id d75a77b69052e-494ae565559si260761681cf.282.2025.05.27.05.02.52 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Tue, 27 May 2025 05:02:52 -0700 (PDT) Received-SPF: pass (google.com: domain of qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=rv9V660k; spf=pass (google.com: domain of qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org"; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=kernel.org Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1uJt0a-0002Ye-AN; Tue, 27 May 2025 08:02:16 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uJt0N-0002Ti-7R; Tue, 27 May 2025 08:02:10 -0400 Received: from dfw.source.kernel.org ([139.178.84.217]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uJt0J-00051K-PJ; Tue, 27 May 2025 08:02:01 -0400 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 407675C5703; Tue, 27 May 2025 11:59:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E773FC4CEE9; Tue, 27 May 2025 12:01:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1748347316; bh=GzwBNftucR2TTDA+jkCP2BEgHRGm6cfj6GYLnBFU2s0=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=rv9V660kGCZC6HH91Pe/hh7rP5U7REIRh03LMz7/m6zHIdM+JNZfkPn+ul0V6+Z2q JuVlLjdgIGzV/SLyezqc2MWoeirHGdBpkDVNDlToM6/Fd4UM0DSLjOY58JST9aBjaB Ie35L9EnsPv5bXagqD98AYXato73IoeZPPdVLnTaf44ggNfG+O6DO3MRM/EK0s45Hm GkJvee5sdxe7kIMuIV6Ws3YfRKs4HkV+ivQanigvC9BwsKTfr+PEuVUFRSUYssxZn7 g+4u0pP6FKwLVrGMhS88jWkAjMIOSFifgfQ2QD2QPW/IOn+8T4M0ukGR2Yq2bBTPGA uETCMXSU2Lw0w== Received: from sofa.misterjones.org ([185.219.108.64] helo=goblin-girl.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1uJt0E-000rtP-KG; Tue, 27 May 2025 13:01:54 +0100 Date: Tue, 27 May 2025 13:01:54 +0100 Message-ID: <86ldqidzyl.wl-maz@kernel.org> From: Marc Zyngier To: Miguel Luis Cc: Eric Auger , "eric.auger.pro@gmail.com" , "qemu-devel@nongnu.org" , "qemu-arm@nongnu.org" , "peter.maydell@linaro.org" , "richard.henderson@linaro.org" , "gkulkarni@amperecomputing.com" , "gankulkarni@os.amperecomputing.com" Subject: Re: [PATCH v5 0/5] ARM Nested Virt Support In-Reply-To: References: <20250527062534.1186004-1-eric.auger@redhat.com> 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/30.1 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: miguel.luis@oracle.com, eric.auger@redhat.com, eric.auger.pro@gmail.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, peter.maydell@linaro.org, richard.henderson@linaro.org, gkulkarni@amperecomputing.com, gankulkarni@os.amperecomputing.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Received-SPF: pass client-ip=139.178.84.217; envelope-from=maz@kernel.org; helo=dfw.source.kernel.org X-Spam_score_int: -99 X-Spam_score: -10.0 X-Spam_bar: ---------- X-Spam_report: (-10.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-2.907, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_HI=-5, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-arm@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org Sender: qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org X-TUID: +t4d60HsYOTj On Tue, 27 May 2025 12:33:23 +0100, Miguel Luis wrote: >=20 > Hi Eric, >=20 > > On 27 May 2025, at 06:24, Eric Auger wrote: > >=20 > > Now that ARM nested virt has landed in kvm/next, let's turn the series > > into a PATCH series. The linux header update was made against kvm/next. > >=20 > > For gaining virt functionality in KVM accelerated L1, The host needs to > > be booted with "kvm-arm.mode=3Dnested" option and qemu needs to be invo= ked > > with: -machine virt,virtualization=3Don. >=20 > For the current kvmarm/next the guest also needs > =E2=80=9Ckvm-arm.mode=3Dnested=E2=80=9D I believe. No, unless you want the guest itself to be NV-capable. M. --=20 Without deviation from the norm, progress is not possible.