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 A9B85CA5FD4 for ; Thu, 1 Oct 2026 15:54:10 +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:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From: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=KnGg/uQCx3R/rKC13pNneXlRRpRtTi+4yYhPo9tV1GY=; b=SGZDkQCIAvclXXVfoMkCWvfV+1 t/lF0nZouQWqAKqCm7wr7LiANyotpCcqNn0H71UohHggzorlbrn4AVGkhoJPZHySS+038/2DjbgPx I+RXsSuVu2pQRpAgUCNc+cnjbrj5VdAoqCBtW0Pc5PLpmhiX3/kHl8R1cgeOZE9/+pjjjXaH+AmWo AqW6Jj78JCFx7KiSLn2xpJ8oGil8LXacMoVDVPTnm+n/NMBE6sFSPZ4+RmWLzUiR1KBaUjM1CuNBd 2A3D2sEDYYWrxtFHN5L9YY8jddbMkULK+nzEbRLemlPLT4+WoBjmcX9NSLqa3ro8mbrg5E5W5ncGa DR7teCHQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xCJ6i-00000009b6c-1OLg; Thu, 01 Oct 2026 15:54:04 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xCJ6f-00000009b5x-0HkV for linux-arm-kernel@lists.infradead.org; Thu, 01 Oct 2026 15:54:02 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 84B8D497; Thu, 1 Oct 2026 08:53:55 -0700 (PDT) Received: from arm.com (usa-sjc-mx-foss1.foss.arm.com [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 0D9613F86F; Thu, 1 Oct 2026 08:53:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1790870038; bh=brRPLivSgp8jybcJZM5iSl0Fx44Zqh0P2ZiJmBX1NY8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=icz1EVIwOxQcL/dRlhcFbwaGgJVDPf80GpsgcCQIEVxmntd+cxXCmGFMpyhH6Dt7x wJ4dmg1XSGLRP1OmqWrupvvlDQZque9l0VC0PMngzTd18jTryaimkSgOQCSlv5EJI/ 1C9QbeeaLIaqeMZHTlRUAEfyPRQlLLAutMOOrYwU= Date: Thu, 1 Oct 2026 16:53:53 +0100 From: Catalin Marinas To: Suzuki K Poulose Cc: kvm@vger.kernel.org, kvmarm@lists.linux.dev, maz@kernel.org, will@kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, steven.price@arm.com, aneesh.kumar@kernel.org, oupton@kernel.org, gshan@redhat.com, joey.gouly@arm.com, tabba@google.com, yuzenghui@huawei.com, linux-coco@lists.linux.dev, gankulkarni@os.amperecomputing.com, sdonthineni@nvidia.com, alpergun@google.com, fj0570is@fujitsu.com, WeiLin.Chang@arm.com, lpieralisi@kernel.org, enju.kohei@fujitsu.com, sudeep.holla@arm.com, jonathan.cameron@oss.qualcomm.com, Jean-Philippe Brucker Subject: Re: [PATCH v20 22/22] KVM: arm64: CCA: Control user register access for Realms Message-ID: References: <20260924160504.853911-1-suzuki.poulose@arm.com> <20260924160504.853911-23-suzuki.poulose@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260924160504.853911-23-suzuki.poulose@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261001_085401_158486_0EBD29D3 X-CRM114-Status: UNSURE ( 9.57 ) X-CRM114-Notice: Please train this message. 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 Thu, Sep 24, 2026 at 05:05:04PM +0100, Suzuki K Poulose wrote: > From: Jean-Philippe Brucker > > The RMM restricts the access to the register states that the host can > read/modify for a given Realm. > > e.g., At VCPU creation, can modify GPRS (x0-x30) and PC. > While servicing SMCCC calls via RSI_HOST_CALL or servicing PSCI > requests. > MMIO emulation in the unprotected space. > > Additionally we use the sysreg configuration to advertise/configure the > following Realm parameters, which are required before the Realm Descriptor > :w Should use Emacs ;) -- Catalin