From patchwork Thu Jan 12 19:18:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 13098698 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 92308C61DB3 for ; Thu, 12 Jan 2023 19:30:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240657AbjALTaM (ORCPT ); Thu, 12 Jan 2023 14:30:12 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49622 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233054AbjALT2e (ORCPT ); Thu, 12 Jan 2023 14:28:34 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9D9BA41003 for ; Thu, 12 Jan 2023 11:22:48 -0800 (PST) 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 3AD826216A for ; Thu, 12 Jan 2023 19:22:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9F993C433EF; Thu, 12 Jan 2023 19:22:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1673551367; bh=JIkhyGIbZT5TNlBcgBvkJJRJMM2Gk2VMCg15Kh+AnmA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=flEZmxwc7ikXsSEvLxjSpzuuf1Ca0CD+K9G4korGsnyNzGNYP/8AGL9f0DGnF+jGT UGbHisjvWnDJmoQ086nWAGtNaBHrrRbXwmXGOFpTOMaAyBH/xDlvFr9MYbV2sTP7lO aONXIg4PNKXgNkwU9ViMKnZHjv+mDfmQV5GE2e3keHhfb6K6ZT+DGRHCJy0K0e4OkG +Ads/oTr45npMwfhw/dJvMBnT4t5Zc3rROQ5pP9V0PIpeGZj9sdjRVp8Zwz0u53lFr fi+rmAxi/SldS3yUjrzeAcjWOR3OKVuYIQsRmRLyJZU8k0SQ4I0Bh/uc1VIffKGkPw K8waCn9Ho+0rA== 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 1pG376-001IWu-TO; Thu, 12 Jan 2023 19:19:51 +0000 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 , Jintack Lim , Russell King , James Morse , Suzuki K Poulose , Oliver Upton , Zenghui Yu Subject: [PATCH v7 33/68] KVM: arm64: nv: Hide RAS from nested guests Date: Thu, 12 Jan 2023 19:18:52 +0000 Message-Id: <20230112191927.1814989-34-maz@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230112191927.1814989-1-maz@kernel.org> References: <20230112191927.1814989-1-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, jintack@cs.columbia.edu, rmk+kernel@armlinux.org.uk, 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 b1dc62dc894d..23c457cbccda 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -2303,6 +2303,7 @@ 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),