From patchwork Thu Aug 15 12:59:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 13764778 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 46367C52D7C for ; Thu, 15 Aug 2024 13:04:35 +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=rc1c7LBK8FcNSPIRRnmwyBszeGPDxnvehnab/UPGK8w=; b=i67E0ZTeF2uHItiL2sd7ki9bNJ qmK+OCW9Mfm3cc7vTXs3f2AKruV3mFj4PvJFg30Te1D4S7NTKHNqDTC1KDrHWlA9ZzE4Tq4AlIk2B TOydTPmh8UMhcExtuTcFH23wWXnuyMorKsUdEV4+lZagO4o9ilRjZj2R8/IgfSTIXL5AZY3jDuNAa znQOdcmR6bZ2EHHE/WWtT7BPeaTA6hzUJPSjEfpDFqhEquYXYsmjx0PUGU7TgdXB+YJc/kFBupmoc qBvPqB+MXROLE2JVIVUqAMzWIPbB9UfhoxPjFsNJJGMFn1u887FyYhz7Kusz2IrpmNadQom+4e0nL qPK5GjLw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sea9P-00000009yqL-1Y9P; Thu, 15 Aug 2024 13:04:23 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sea5I-00000009xj9-1CRc for linux-arm-kernel@lists.infradead.org; Thu, 15 Aug 2024 13:00:10 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 6BDAA61E91; Thu, 15 Aug 2024 13:00:07 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3FC94C32786; Thu, 15 Aug 2024 13:00:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1723726807; bh=vrHRh1ie6Y+/25mrEk7jHWLcNcemrezm5Snx7mIYljY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HMn4mA18G7s9UOWzyejGPEPGijMXtpCN13tjdHV22Va5DMSWZ3Nek2cGhhNZWKt+J HcZfvbVSMvGBmD8y+Rw2Cq/7aXjV/uHZwknjO6+AaV5IFouLz8QPXRrvkY/2buSajq +TRCtwmYsJKQWweHy0GxnJWOnKPxXPJVLx2HezimdbUx1geIbW4VZtCUjBhOANXRcx ovoq7rGGTkG+Aimizi7Ku/9OjSr08RTjivoTYt+CSMdXmjheTYxuxYg4rlQ1j6u727 gY9V/KBlqhctsI0psu6K+mT1WcoBvRPtMiFhcI43N2+8OmZ2FSw+oMEr3EJ9iYrvUD LAJlN5mnMDHnA== 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 1sea5E-003xld-Bn; Thu, 15 Aug 2024 14:00:04 +0100 From: Marc Zyngier To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org Cc: James Morse , Suzuki K Poulose , Oliver Upton , Zenghui Yu Subject: [PATCH 09/11] KVM: arm64: nv: Expose FEAT_LS64* to a nested guest Date: Thu, 15 Aug 2024 13:59:57 +0100 Message-Id: <20240815125959.2097734-10-maz@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240815125959.2097734-1-maz@kernel.org> References: <20240815125959.2097734-1-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, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240815_060008_597776_9156A5D9 X-CRM114-Status: GOOD ( 11.40 ) 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 Now that we correctly support FEAT_LS64*, don't hide it from nested guests anymore. Signed-off-by: Marc Zyngier --- arch/arm64/kvm/nested.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/arch/arm64/kvm/nested.c b/arch/arm64/kvm/nested.c index de789e0f1ae9..97b16127755e 100644 --- a/arch/arm64/kvm/nested.c +++ b/arch/arm64/kvm/nested.c @@ -808,10 +808,9 @@ static void limit_nv_id_regs(struct kvm *kvm) val &= ~NV_FTR(ISAR0, TME); kvm_set_vm_id_reg(kvm, SYS_ID_AA64ISAR0_EL1, val); - /* Support everything but Spec Invalidation and LS64 */ + /* Support everything but Spec Invalidation */ val = kvm_read_vm_id_reg(kvm, SYS_ID_AA64ISAR1_EL1); - val &= ~(NV_FTR(ISAR1, LS64) | - NV_FTR(ISAR1, SPECRES)); + val &= ~NV_FTR(ISAR1, SPECRES); kvm_set_vm_id_reg(kvm, SYS_ID_AA64ISAR1_EL1, val); /* No AMU, MPAM, S-EL2, or RAS */