From patchwork Tue Aug 13 10:43:59 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 13761771 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 65D90C52D7C for ; Tue, 13 Aug 2024 10:47:59 +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=TnEHOdRIqDBs/+vnxE1vmyKNUV 9SG0ZfpZFjn0jvDxuZ1JGtIBLF61XgbmFd/1Cx/HkdgI8vtQNUIbPrXnFV/zdFG9RkS3PGoxqItDg k3IQjgEyKj4bpRVKdgaNIvJCVQ4Rq0hXG1T/LSk18PXXMfz6Np/7tvbh67NIxlHMhLZ23E386kKhe wP639ww0qS8utOF+eh6D/6bsFDa18n/jJIfDywEMnxy8yu/0atkacRx+n4PGiaw060DfWZLXs0yOt FbnL8zHJDb9dYfN1HmK3GzRDd2kWJyuo7jDW7eYS/+0WsRWF09HoWQcwN+NpGEczHfbkIR1UptbcE j8J1BBGw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sdp4A-00000003OGC-0Oam; Tue, 13 Aug 2024 10:47:50 +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 1sdp0e-00000003NEt-0xrM for linux-arm-kernel@lists.infradead.org; Tue, 13 Aug 2024 10:44:14 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 6F71A61640; Tue, 13 Aug 2024 10:44:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 117E9C4AF1B; Tue, 13 Aug 2024 10:44:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1723545851; bh=4HwTm/sykbQDERcywrayLevJsGBUpXDaZP64IyuOh0o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bexLQW99LYdXFHqeHe8Xke5P3TncehoVUdHjMott4SX2a77ePCxuOfkAm7UMk3J5T 4dMqlS0cFiAMLTxZmUO+jhHeSDyfMh75gzIDnpTBmbUs7H+9AwVLyxmoHuvnbgUY0O Rd/2JacH9fbFD1+M8cl2ExEyTxj+c1ePdo9YT+HlXSYNQ05AmixxR2dQw8B3eqsVUF fpfXD6NVc3UEKQT6SP0gV2LcybGRqP6/cnfovk/3IQO6SNQ1c5b5vC2TkvQ0knwty4 CbtqcJWNp3omX2vg0CMCphCNVZJ0EcAI+qtw2wxJeBIurKZqJXvq3yQNGd/l/qZ5Ny BaIwPzqovkofg== 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 1sdp0b-003JD1-AB; Tue, 13 Aug 2024 11:44:09 +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 v3 7/8] KVM: arm64: Enable FP8 support when available and configured Date: Tue, 13 Aug 2024 11:43:59 +0100 Message-Id: <20240813104400.1956132-8-maz@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240813104400.1956132-1-maz@kernel.org> References: <20240813104400.1956132-1-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-20240813_034412_446950_68C0F802 X-CRM114-Status: GOOD ( 10.85 ) 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))