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 6A148CCA470 for ; Wed, 1 Oct 2025 13:11:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: References:In-Reply-To:Subject:Cc:To:From:Message-ID:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=LjNrmRdytkv/9ECvQ2nbYckKEJ8S9u2VZaJW+uh9vfs=; b=FV+qpJuSihZ7QHsQw2IVlhf5c0 jT1UZxTm6UrDJOTTf2Fy7qPr61LWuvUoglvBDEXXOLV2pWbmUI60JEmmd7BQR8VB0LrANLiZum/wm sorCmEp62u8rYLoW1fY/rZntw1eS7Ot89ouAu7TQkeCf4n0ZGTovI3359MMPiIcanDlBtt+fv1S1q pd+JQgDvpEz8yqe0PeEZon2am0/dgJ9kQwlo0JoPf8jTS5WrKUhkwSjMOBYGAOlfRaYAxvNRnuxf7 QL7jFbr1JqM6nZeK04w8Qll2YWh6XV/2WkUYi+k7wwlrKNdKgyfQjxW+Zcif97aR4ddSN8ACZfuM3 eyz6KsBw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1v3wcZ-00000007ydb-1rOv; Wed, 01 Oct 2025 13:11:51 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1v3wcW-00000007ydC-2e8Y for linux-arm-kernel@lists.infradead.org; Wed, 01 Oct 2025 13:11:49 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 46C3940581; Wed, 1 Oct 2025 13:11:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 16CE1C4CEF4; Wed, 1 Oct 2025 13:11:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1759324308; bh=clujk22pKlR3lY5QkTpBaiYqGOkG+FR+VUr/OI56JdE=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=t6dO4Qcq2sgN7MqMsG/tl7axae64golJdNSQYH49U2njLFcdLDW2/UKLm/I8YP6hA qMZ+eTrysKQpzc74Rk430lXfMCafWTjnmOZNYPOS8/4ACokUJWcqA0VbYFkg4+h0ED ioi99/Kt4Tw3BQcYr/WfBKWUzoLBzI4k/DEm14+4TiXg8cnM4KtSAJpwXmGDrZi3t7 oHNa/xR3uuDwWEpJVDwVbq/K1Z4kLFqQzIpLAR7hegl0xVhLftGeyd9DFWSKSNMojh hcJ2SmR5l3SK4zZ5EzSwdanA87PmX8ctlLjWZpzDcO6yumncHFZJrnq9FWTAPwFAbo ZqL8j43BqtQGQ== 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 4.98.2) (envelope-from ) id 1v3wcT-0000000Ao9g-1u79; Wed, 01 Oct 2025 13:11:45 +0000 Date: Wed, 01 Oct 2025 14:11:44 +0100 Message-ID: <86ikgyzrzj.wl-maz@kernel.org> From: Marc Zyngier To: Steven Price Cc: kvm@vger.kernel.org, kvmarm@lists.linux.dev, Suzuki K Poulose , Catalin Marinas , Will Deacon , James Morse , Oliver Upton , Zenghui Yu , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Joey Gouly , Alexandru Elisei , Christoffer Dall , Fuad Tabba , linux-coco@lists.linux.dev, Ganapatrao Kulkarni , Gavin Shan , Shanker Donthineni , Alper Gun , "Aneesh Kumar K . V" , Emi Kisanuki , Vishal Annapurve Subject: Re: [PATCH v10 08/43] kvm: arm64: Don't expose debug capabilities for realm guests In-Reply-To: <20250820145606.180644-9-steven.price@arm.com> References: <20250820145606.180644-1-steven.price@arm.com> <20250820145606.180644-9-steven.price@arm.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=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: steven.price@arm.com, kvm@vger.kernel.org, kvmarm@lists.linux.dev, suzuki.poulose@arm.com, catalin.marinas@arm.com, will@kernel.org, james.morse@arm.com, oliver.upton@linux.dev, yuzenghui@huawei.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, joey.gouly@arm.com, alexandru.elisei@arm.com, christoffer.dall@arm.com, tabba@google.com, linux-coco@lists.linux.dev, gankulkarni@os.amperecomputing.com, gshan@redhat.com, sdonthineni@nvidia.com, alpergun@google.com, aneesh.kumar@kernel.org, fj0570is@fujitsu.com, vannapurve@google.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-20251001_061148_690840_EFAF97E8 X-CRM114-Status: GOOD ( 12.06 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, 20 Aug 2025 15:55:28 +0100, Steven Price wrote: > > From: Suzuki K Poulose > > RMM v1.0 provides no mechanism for the host to perform debug operations > on the guest. So don't expose KVM_CAP_SET_GUEST_DEBUG and report 0 > breakpoints and 0 watch points. What is the guest seeing for the same things? M. -- Without deviation from the norm, progress is not possible.