From patchwork Mon Jul 8 15:44:37 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 13726752 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 AD055C3271E for ; Mon, 8 Jul 2024 15:45:48 +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=yZVlbXlbSt+TlUeNPpIjJXx000OiPgQM5NdVJ/pyEpM=; b=MiMQhrG5YpNXhOTsE929RiVtfE z4ZSDSdqwP5BEWZRAy86VdqJ0lvP/XpESjVXyho3FvHy6MCZkURQ14FpRxy0JAGJ3s/HzrO0q+mA/ KRDAn1wRxccAeS/+vsOcDn3w6/U+CAiu894qPx89HL81wcapBPc18nncZQj4B7nIc+2tODwG5ewWu r4MN7yoTK/XUcon3Mpa0mg3q7xDVq/60E0npBBZvoHyAh3ybYEYrmjkUDrRYYO58QUFsD6oQtvBp8 QwpWwjnl6D2Pm+iqAdFUsZLqe1gVEAkwtHCJzMHmX/dylx2CHu6P3ALjK4+Cp+gj8tF18RCYgMhiq JMHCfOnw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sQqYd-00000004GzI-0zJG; Mon, 08 Jul 2024 15:45:39 +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 1sQqXw-00000004GgM-1siX for linux-arm-kernel@lists.infradead.org; Mon, 08 Jul 2024 15:44:59 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id AA4C660EC3; Mon, 8 Jul 2024 15:44:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 784E2C4AF0C; Mon, 8 Jul 2024 15:44:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1720453495; bh=JsX6GaTs7Vi33NMLLUOYXeMXmeUqBGTgNLnsPE11cdk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bu/8PvUPlZ22Q8ni+39V+88hKotMKO8bpsopdo9VWOJ6cRSEWTu+Ek8TaMlSlgKoL bBcm6a43DAmETjnZ7lRXve8My8WCE1d2vXG7tvcGoaCM2RVTBCYgYQjO+q1vYnADJB JRdcrqSWO5dBPE7F3/7VlrZ/Vr5wrGLb/tIHs3zYMfSVnFbjgW3+GktLzC/LWPW5p7 aCxmqiCEokHMD8U1+b9HPKwyyivQyEHfsnsXuQYMFo9eJDx7NcbJe3gk6SDL3EB6Xw adRzC3XDdmzef+8v81ZDEPhN5/bzaSJ9c9n3UHA3IGgRhSQ+LUw7ABklA58Bblqns8 789UgnzLOYMEw== 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 1sQqXt-00Ae1P-NS; Mon, 08 Jul 2024 16:44:53 +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 , Fuad Tabba , Joey Gouly , Mark Brown Subject: [PATCH 6/7] KVM: arm64: Enable FP8 support when available and configured Date: Mon, 8 Jul 2024 16:44:37 +0100 Message-Id: <20240708154438.1218186-7-maz@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240708154438.1218186-1-maz@kernel.org> References: <20240708154438.1218186-1-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, tabba@google.com, joey.gouly@arm.com, broonie@kernel.org 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-20240708_084456_577070_B07E4157 X-CRM114-Status: GOOD ( 10.51 ) 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 If userspace has enabled FP8 support (by setting ID_AA64PFR2_EL1.FPMR to 1), let's enable the feature by setting HCRX_EL2.EnFPM for the vcpu. Signed-off-by: Marc Zyngier --- arch/arm64/kvm/sys_regs.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 1157c38568e22..8b5caad651512 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -4579,6 +4579,9 @@ void kvm_calculate_traps(struct kvm_vcpu *vcpu) if (kvm_has_feat(kvm, ID_AA64MMFR3_EL1, TCRX, IMP)) vcpu->arch.hcrx_el2 |= HCRX_EL2_TCR2En; + + if (kvm_has_feat(kvm, ID_AA64PFR2_EL1, FPMR, IMP)) + vcpu->arch.hcrx_el2 |= HCRX_EL2_EnFPM; } if (test_bit(KVM_ARCH_FLAG_FGU_INITIALIZED, &kvm->arch.flags))