From patchwork Tue Aug 20 13:18:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 13770102 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 567B3C531DC for ; Tue, 20 Aug 2024 13:25:34 +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=FcWqYFJyuo6CuiuBaQrRxbtVxDiNESKx9NIxpclNY9g=; b=HWp7jKGnwbXZS2GumXh4w/sN/A BfIeALNii30l2/CVoQ+4pkZDvxKosgQZFe/22mf2OYnsmPx8u0cWi5UAepoWekDo5rfG0b/Ud9px3 pvOHjFpcw1a8vsdOCM0/Hfj/OPw7GXUQwpmpLRCpROqtrbWpXaIq04tQL0RCf725zCXRYsBa2bqmc GL+c5AVZVRHojmmIfXdKq3ZFwCtKykfdTaxe9SCFqha5PovRN2K6I1dYNEFHhofvegPoskV0wCTEW EBzXuWuvA9UVhaihie3gfZKlP1xPKGRFw8jRbno9agEE98DxXWY/Ar130BHhbazAJBxx9hACa82Sf QkJpePrQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sgOrL-00000005LXE-0J3q; Tue, 20 Aug 2024 13:25:15 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sgOkV-00000005Jiz-19zl for linux-arm-kernel@lists.infradead.org; Tue, 20 Aug 2024 13:18:13 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 72AAA60DDF; Tue, 20 Aug 2024 13:18:09 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3D5E5C4AF15; Tue, 20 Aug 2024 13:18:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1724159889; bh=4HwTm/sykbQDERcywrayLevJsGBUpXDaZP64IyuOh0o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nvkc17j8pl+DVKtIgXfnWRICW/rl5T1oS7MvQqwy7FJjSE0NMop8y6QK0ZOf/K51L XHPIrSBEv0Mm9/SfgXWngLWWastDaSmui6uoTvY0OtZW1KQz6uparUvxscygvT+mtb N5eFgY/OF4fM8SY8O+OkraSuAL9njzldpoki+DVJpyU9zuyZ1ElfC/YL7FrspSgmoU YTsZrVF4n/oRvQVr1fraqRaN/AcodWNl2jlu+RgTXm3kdJeYtij+zAvrXtqCzeAT/Z AvlDF+ZyvSYpMXn6flyZMRyKUhVazZHaLC+XtQjgk1a+o6RYYv4OP36UkhP3V51dBY nthzdx1ktdMPw== 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 1sgOkR-005HMQ-D3; Tue, 20 Aug 2024 14:18:07 +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 v4 7/8] KVM: arm64: Enable FP8 support when available and configured Date: Tue, 20 Aug 2024 14:18:01 +0100 Message-Id: <20240820131802.3547589-8-maz@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240820131802.3547589-1-maz@kernel.org> References: <20240820131802.3547589-1-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-20240820_061811_494470_BE330B81 X-CRM114-Status: GOOD ( 10.69 ) 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 4c2f7c0af537..51627add0a72 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_fpmr(kvm)) + vcpu->arch.hcrx_el2 |= HCRX_EL2_EnFPM; } if (test_bit(KVM_ARCH_FLAG_FGU_INITIALIZED, &kvm->arch.flags))