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 mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by smtp.lore.kernel.org (Postfix) with ESMTP id 625E8C433F5 for ; Fri, 28 Jan 2022 12:51:11 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 12CD64B131; Fri, 28 Jan 2022 07:51:11 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@kernel.org Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id fcLnnzx4mqxs; Fri, 28 Jan 2022 07:51:09 -0500 (EST) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 742E54B22C; Fri, 28 Jan 2022 07:51:08 -0500 (EST) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 7279D4B1E7 for ; Fri, 28 Jan 2022 07:51:07 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Ppeyr9F4En+E for ; Fri, 28 Jan 2022 07:51:06 -0500 (EST) Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 4C15F4B204 for ; Fri, 28 Jan 2022 07:51:06 -0500 (EST) 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 C68A861CAE; Fri, 28 Jan 2022 12:51:05 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 99DB0C340E0; Fri, 28 Jan 2022 12:51:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1643374265; bh=QNYfQ4nWJsQi/3DRoVVwcKktckvbvFtn7+vYhA9xY+A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dEbCaksIdXBWaJsSkmn2KfgiyUZ//G6xsgB69pskssWpYSo8a4Z6cTo3VyE75I20a 4dvRuD69yoHSothHmadr27suIwwJCzsS94A3PQ0bKHt6zqGKi6AubOE8OYDkB1Uvic cjxSRfQlHWfdrnmNWzKSM09dAzLMJRMAYY6yyAwaGYuxyiFp/eSFQBzE/C9jnoJRgb uC31Bh7ngmXQxPbDRRXkc80oSB6pNdH/gL3I3fdVjxv52kBVxQNIszZn4yv/+5yEcm 3Z49vBIxKUYJ4kW062dEP/3nlgdDnIRjys4fKOfhom0VdCAWswcok2sEWhvI5ehzxH 3sYcW2Gd6IvXw== 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 1nDQEF-003njR-5y; Fri, 28 Jan 2022 12:19:47 +0000 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Subject: [PATCH v6 33/64] KVM: arm64: nv: Hide RAS from nested guests Date: Fri, 28 Jan 2022 12:18:41 +0000 Message-Id: <20220128121912.509006-34-maz@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220128121912.509006-1-maz@kernel.org> References: <20220128121912.509006-1-maz@kernel.org> MIME-Version: 1.0 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, chase.conklin@arm.com, linux@armlinux.org.uk, james.morse@arm.com, suzuki.poulose@arm.com, alexandru.elisei@arm.com, karl.heubaum@oracle.com, mihai.carabas@oracle.com, miguel.luis@oracle.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 Cc: kernel-team@android.com, Andre Przywara , Christoffer Dall , Chase Conklin , "Russell King \(Oracle\)" , mihai.carabas@oracle.com, Ganapatrao Kulkarni X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu 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 ebcdf2714b73..5e8876177ce6 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[] = { 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), -- 2.30.2 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm