From patchwork Wed Apr 5 15:39:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 13202043 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 73469C761A6 for ; Wed, 5 Apr 2023 15:42:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238968AbjDEPmI (ORCPT ); Wed, 5 Apr 2023 11:42:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48324 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238769AbjDEPmG (ORCPT ); Wed, 5 Apr 2023 11:42:06 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CDF3E6199 for ; Wed, 5 Apr 2023 08:41:50 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id C133063EDC for ; Wed, 5 Apr 2023 15:41:02 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 30B2FC433D2; Wed, 5 Apr 2023 15:41:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1680709262; bh=H4ZPPuw9ENZrxHpUu14yMy4L+2lAlUmeVTn4NNvf+Uc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZUPC+pyl2rtEsiQF8NjK5PXvlVZPtQ5DUdhO82B6GgGTWjLLL9SVJZAELk73iyz74 pZfxZ62KLt2F2FL3uOqRYU/nEDrm9A/3qmdIctg2BzIGpfuxvi/A1SoJ49ecmp9AaT 5fdo19w7dXoWbggZeTT8JSJKPJS7VM1Xj7lipsyifQgu1Y02fBeQ6nN0jvSbIhnR+C lGwccZXXeNUQYBtNVgGFNZXyiyamlGQGPpSoNfDYFYdohU1zF+2VOKbmiehO3hBS1X kclNhokeEoj0sv0ATVMOMaEgDEzeRVLwp+0bUYIJTu+/PVUOz6BRhkGLdy+lUiEQOO RqoJEPuWcORgA== Received: from sofa.misterjones.org ([185.219.108.64] helo=valley-girl.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1pk5FR-0062PV-Ns; Wed, 05 Apr 2023 16:40:33 +0100 From: Marc Zyngier To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Alexandru Elisei , Andre Przywara , Chase Conklin , Christoffer Dall , Ganapatrao Kulkarni , Darren Hart , Jintack Lim , Russell King , Miguel Luis , James Morse , Suzuki K Poulose , Oliver Upton , Zenghui Yu Subject: [PATCH v9 24/50] KVM: arm64: nv: Hide RAS from nested guests Date: Wed, 5 Apr 2023 16:39:42 +0100 Message-Id: <20230405154008.3552854-25-maz@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230405154008.3552854-1-maz@kernel.org> References: <20230405154008.3552854-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, alexandru.elisei@arm.com, andre.przywara@arm.com, chase.conklin@arm.com, christoffer.dall@arm.com, gankulkarni@os.amperecomputing.com, darren@os.amperecomputing.com, jintack@cs.columbia.edu, rmk+kernel@armlinux.org.uk, miguel.luis@oracle.com, james.morse@arm.com, suzuki.poulose@arm.com, oliver.upton@linux.dev, 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 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org We don't want to expose complicated features to guests until we have a good grasp on the basic CPU emulation. So let's pretend that RAS, doesn't exist in a nested guest. We already hide the feature bits, let's now make sure VDISR_EL1 will UNDEF. Signed-off-by: Marc Zyngier --- arch/arm64/kvm/sys_regs.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 0c868c9af8d9..42d67f74b54a 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -2444,6 +2444,7 @@ static const struct sys_reg_desc sys_reg_descs[] = { EL2_REG(VBAR_EL2, access_rw, reset_val, 0), EL2_REG(RVBAR_EL2, access_rw, reset_val, 0), { SYS_DESC(SYS_RMR_EL2), trap_undef }, + { SYS_DESC(SYS_VDISR_EL2), trap_undef }, EL2_REG(CONTEXTIDR_EL2, access_rw, reset_val, 0), EL2_REG(TPIDR_EL2, access_rw, reset_val, 0),