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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2D7B5C83F25 for ; Mon, 21 Jul 2025 11:39:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=u1VbYmhgXUuSbfhRw1WciUzKalIQhkMzI/K6yxuw8ko=; b=1IzJA1DQNobHjmiR55mFk+DwYZ DK1j62SMt0h4AB7D1Zxh30loR49wPs1ZymV/dTQLtll9+ouTV2bqti2uH5eTAZmy6BexHbayBXKui AsNwkfr47qeoTf/rFBZ0zyKBes4dvwJklYOhPjYgk11rlg1BVeUoXd48TX4rnRL0f0FZVf7/hOca/ LEr02xeY/uGqRzqIHPX1KHxPeU54Efo1tCAjSUL1YRJPWVGD0+E9JY2/19MksEJfEyEWVIy2iz7T0 fpF6JXe3k5cfUeYsTdFMEaS/sBWZh7c62wiKydhdp+10LqG0VdauQ4H1BmCujqatjWPbWMosApsCk xWbNxa+A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1udors-0000000H7ri-2auT; Mon, 21 Jul 2025 11:39:40 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1udncu-0000000Gwlw-3ov9 for linux-arm-kernel@lists.infradead.org; Mon, 21 Jul 2025 10:20:11 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id A10D645DDD; Mon, 21 Jul 2025 10:20:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 843CAC4CEED; Mon, 21 Jul 2025 10:20:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1753093208; bh=hpSa9Hytttj/ZwtZ6FrPhzLZMQJROeFl8J2vEUiLn7U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XnoFQNwh2Fgz5KcR53GCy4ZmDpYmWnwB3lczuWDvMfRT6HQ7z8qJ660Qg8xhJYbsq TFu7sW35VxlvGQpTD/VVS3m22yMPv1fmzPJmrRXvzeIGhOHRU7IevGOkkjqmcjc7Uu tgE38WDqEaRklsURICOHIlJ6qVNbXzpNTugsHR+JOM1iH+yEK3Qr1vG1oFkmz2DRpQ S7OlxOOXesq1jBQXYLxHWJOXSChXVXx+9LmMB5sjnGE4EI5jm8YD/j7OUiK8TU4JWr Egpn4MEIE/+0NB6sdCTe/Ihm6X9nRanr2RFFBP86eKLX8jazGaVgSS2uK4E/EyNjxe 5SDzWwbcot9bA== 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 1udncs-00HZDF-QJ; Mon, 21 Jul 2025 11:20:06 +0100 From: Marc Zyngier To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org Cc: Joey Gouly , Suzuki K Poulose , Oliver Upton , Zenghui Yu , Will Deacon , Catalin Marinas Subject: [PATCH 7/7] KVM: arm64: Make ID_AA64PFR0_EL1.RAS writable Date: Mon, 21 Jul 2025 11:19:55 +0100 Message-Id: <20250721101955.535159-8-maz@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20250721101955.535159-1-maz@kernel.org> References: <20250721101955.535159-1-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: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, joey.gouly@arm.com, suzuki.poulose@arm.com, oliver.upton@linux.dev, yuzenghui@huawei.com, will@kernel.org, catalin.marinas@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250721_032008_974888_E0442D2B X-CRM114-Status: GOOD ( 10.93 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Make ID_AA64PFR0_EL1.RAS writable so that we can restore a VM from a system without RAS to a RAS-equipped machine (or disable RAS in the guest). Signed-off-by: Marc Zyngier --- arch/arm64/kvm/sys_regs.c | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 549766d7abca8..64707c62f1cf9 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -2946,7 +2946,6 @@ static const struct sys_reg_desc sys_reg_descs[] = { ~(ID_AA64PFR0_EL1_AMU | ID_AA64PFR0_EL1_MPAM | ID_AA64PFR0_EL1_SVE | - ID_AA64PFR0_EL1_RAS | ID_AA64PFR0_EL1_AdvSIMD | ID_AA64PFR0_EL1_FP)), ID_FILTERED(ID_AA64PFR1_EL1, id_aa64pfr1_el1, -- 2.39.2