From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 22AB437CD2A; Mon, 6 Jul 2026 20:51:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783371098; cv=none; b=KiNNwnu6ijQ8SOWqivGD0f0+MBAJ9HAUhyzW7rhwr1H8J5fzMRLzV2FjdiLMw0zKgBQ2p6JFhgKBV4L70RhFCEU2FbvnUj6qBfI1IM1HN9a2CY98P9MFN7sdg6SpE/7ZViJGY5xJgpGjUvk7a9Xd4Kpjrwchi54KdfBAPzURDSE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783371098; c=relaxed/simple; bh=gWOgPY+EPN7SnMBbsb6P++/9bTNGvJYvz98yKpCTI/k=; h=Date:Message-ID:From:To:Cc:Subject:In-Reply-To:References: MIME-Version:Content-Type; b=SaekQ+xo+WDyW8pufWoCKV3J9SsT9gI/oAMIRjyJTsffWXuRZNFerSyXkEzcDaJNfAd3CbGlGnKEdJEu74DcKf6DxoN8MVPT9Wlc3qSrMwoaj+ZMflARZs1anZeSsyTHD8tRawc8CKZAVdvYCumMnsMRmustDHLmYTyR8argNVo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=I4jOxE4M; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="I4jOxE4M" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B85651F000E9; Mon, 6 Jul 2026 20:51:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783371096; bh=+4UL9vNTIa66ZyJ+ogpqLMnNj6eSS/JYnaK/Pyh9xOo=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=I4jOxE4M97kQhtPGFLTEcRbXYrZce923uXDq3KljR0V30M3Zn7lgZPBSsiR0fFDtH tK9iHn9cDkt2+1NqJgc1qsV0L+lE/nG4UeX/XRUHRopl2gIRqYUgpMOImN0+ciweZ2 HbGe8QQSY5skI3ksz/9Rf6GQkZbn7PtZa7jfxtaXnwWV5ZVcNTaRJZDJP7BezDdu0G gDGTpsC7T0lNjqORQmJJLWnXAUzKzlzxKtIdmffOa9KmNzHyIJPLeN+gJtN1Zz5M6C qisn44UM/GTN7CyTCRHKdCi2YWt9LLmSgbU9KSZ7flHiTTs2InvzXm+OdvPeKniUqX fOo4gbAwjNU3w== Received: from sofa.misterjones.org ([185.219.108.64] helo=lobster-girl.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1wgqHu-000000028HA-2Wfq; Mon, 06 Jul 2026 20:51:34 +0000 Date: Mon, 06 Jul 2026 21:53:23 +0100 Message-ID: <87a4s37scc.wl-maz@kernel.org> From: Marc Zyngier To: Steffen Eiden Cc: kvm@vger.kernel.org, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, Alexander Gordeev , Andreas Grapentin , Arnd Bergmann , Catalin Marinas , Christian Borntraeger , Claudio Imbrenda , David Hildenbrand , Friedrich Welter , Gautam Gala , Hariharan Mari , Heiko Carstens , Hendrik Brueckner , Ilya Leoshkevich , Janosch Frank , Joey Gouly , Nico Boehr , Nina Schoetterl-Glausch , Oliver Upton , Paolo Bonzini , Suzuki K Poulose , Sven Schnelle , Ulrich Weigand , Vasily Gorbik , Will Deacon , Zenghui Yu Subject: Re: [PATCH v4 05/27] KVM: Remove KVM_MMIO as config option In-Reply-To: <20260706085229.979525-6-seiden@linux.ibm.com> References: <20260706085229.979525-1-seiden@linux.ibm.com> <20260706085229.979525-6-seiden@linux.ibm.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) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: seiden@linux.ibm.com, kvm@vger.kernel.org, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, agordeev@linux.ibm.com, gra@linux.ibm.com, arnd@arndb.de, catalin.marinas@arm.com, borntraeger@linux.ibm.com, imbrenda@linux.ibm.com, david@kernel.org, fritz@linux.ibm.com, ggala@linux.ibm.com, hari55@linux.ibm.com, hca@linux.ibm.com, brueckner@linux.ibm.com, iii@linux.ibm.com, frankja@linux.ibm.com, joey.gouly@arm.com, nrb@linux.ibm.com, oss@nina.schoetterlglausch.eu, oupton@kernel.org, pbonzini@redhat.com, suzuki.poulose@arm.com, svens@linux.ibm.com, Ulrich.Weigand@de.ibm.com, gor@linux.ibm.com, will@kernel.org, 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 On Mon, 06 Jul 2026 09:52:05 +0100, Steffen Eiden wrote: > > Defining KVM_MMIO is not flexible enough for multi-KVM systems with > different Kconfig options regarding KVM_MMIO. Therefore, remove KVM_MMIO > from the config space and use the macro HAVE_KVM_MMIO instead. > Given that there is only one KVM architecture that doesn't use KVM_MMIO, it feels like the polarity of this symbol is the wrong way around. Something like KVM_NO_MMIO, only exposed by S390 for its native support, should significantly reduce the churn. Thanks, M. -- Jazz isn't dead. It just smells funny.