From patchwork Mon May 15 17:30:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 13241977 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 B5D59C77B75 for ; Mon, 15 May 2023 17:50:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244913AbjEORus (ORCPT ); Mon, 15 May 2023 13:50:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47386 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244128AbjEORu1 (ORCPT ); Mon, 15 May 2023 13:50:27 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7D8DF16EA1 for ; Mon, 15 May 2023 10:48:34 -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 413426233D for ; Mon, 15 May 2023 17:48:23 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A5538C433A0; Mon, 15 May 2023 17:48:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1684172902; bh=7fShZrDUash1wyylQ+DkORTt1ZUQvuw5zUThr8G57Ao=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HCCFe65/JbZrM3LnhckpOsZALLNvfs6YVmLpNecszwot2dgpN417vMBrQSVP8rwvM eUrbd/yoHBjgwuGBqpDJmSNyTZpxD/f2RndwEhSPN4l9dczB9xbUJWWLq5aYL8SfxM M/WflJw39rv6fkFaEydOL/4N8ngfEy2VBCHbRnuMFNhxFHSkK/4vENW2G4WJxEvOEc CEXc4J4QWn0rPoWpmO2mruzQbG4F7kSzj0bAjyB/F1548bBlVjtjZii1W564OsrWrF saZSANh+TEh4IR9NKoWqao84w3XbAVg+ix2DKdkQJXzKAOlfz6AzAonbTFfeEtnwbz mr15grbOxZZfw== 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 1pyc2m-00FJAF-DS; Mon, 15 May 2023 18:31:32 +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 v10 34/59] KVM: arm64: nv: Hide RAS from nested guests Date: Mon, 15 May 2023 18:30:38 +0100 Message-Id: <20230515173103.1017669-35-maz@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230515173103.1017669-1-maz@kernel.org> References: <20230515173103.1017669-1-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 1c66f0520ec3..0ed928dfe345 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -2391,6 +2391,7 @@ 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),