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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 52118C433F5 for ; Mon, 29 Nov 2021 21:42:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230129AbhK2Vps (ORCPT ); Mon, 29 Nov 2021 16:45:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48534 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229947AbhK2Vno (ORCPT ); Mon, 29 Nov 2021 16:43:44 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 43E70C08EB29 for ; Mon, 29 Nov 2021 12:05:32 -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 ams.source.kernel.org (Postfix) with ESMTPS id 0DD4DB815E0 for ; Mon, 29 Nov 2021 20:05:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B8EE3C53FAD; Mon, 29 Nov 2021 20:05:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1638216329; bh=usQKK1QDwEOQfu0+rZQRJzPmnngXGsisGciL9kGVuek=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YVknn53E9Gy4gXhztyKswrGYO9rs/YUAhJspXakKIKEXmswoxyOlP5DGBTGrBCVcb sjfGNcIsDJT52U4idpWUu0gxa1wZHC53hJXKpmOvD7MC8dCIHsog4EYC1EF5h94U9n WpRZ2M6xb8TahhIosEztIiNxbxdDLJYdN9F9zncXeKSmOo7eyk18QlROdDK8uhnCIW btPHiFe+Yw+S+MqZYS98VTu24aAmegvzp4DkYMiHehWe0T8WMo/Bo9Ycmckq9mX9Vc wnMNfpUDzng7ElY/SmFwfkxVQrTbBIGnvScptk/FyIhRQwUuHUaE74sV7Ih+0yERCL wER6oA+TBZkzQ== Received: from sofa.misterjones.org ([185.219.108.64] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1mrmqz-008gvR-3p; Mon, 29 Nov 2021 20:02:21 +0000 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Cc: Andre Przywara , Christoffer Dall , Jintack Lim , Haibo Xu , Ganapatrao Kulkarni , James Morse , Suzuki K Poulose , Alexandru Elisei , kernel-team@android.com Subject: [PATCH v5 37/69] KVM: arm64: nv: Hide RAS from nested guests Date: Mon, 29 Nov 2021 20:01:18 +0000 Message-Id: <20211129200150.351436-38-maz@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211129200150.351436-1-maz@kernel.org> References: <20211129200150.351436-1-maz@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, andre.przywara@arm.com, christoffer.dall@arm.com, jintack@cs.columbia.edu, haibo.xu@linaro.org, gankulkarni@os.amperecomputing.com, james.morse@arm.com, suzuki.poulose@arm.com, alexandru.elisei@arm.com, kernel-team@android.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 19b33ccb61b8..3922ecc00869 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -2212,6 +2212,7 @@ static const struct sys_reg_desc sys_reg_descs[] = { { SYS_DESC(SYS_VBAR_EL2), access_rw, reset_val, VBAR_EL2, 0 }, { SYS_DESC(SYS_RVBAR_EL2), access_rw, reset_val, RVBAR_EL2, 0 }, { SYS_DESC(SYS_RMR_EL2), trap_undef }, + { SYS_DESC(SYS_VDISR_EL2), trap_undef }, { SYS_DESC(SYS_CONTEXTIDR_EL2), access_rw, reset_val, CONTEXTIDR_EL2, 0 }, { SYS_DESC(SYS_TPIDR_EL2), access_rw, reset_val, TPIDR_EL2, 0 }, -- 2.30.2