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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 BA5B7D5B16C for ; Mon, 15 Dec 2025 07:13:44 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vV2lh-00038R-UT; Mon, 15 Dec 2025 02:13:17 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vV2le-00036r-9i for qemu-devel@nongnu.org; Mon, 15 Dec 2025 02:13:14 -0500 Received: from mgamail.intel.com ([198.175.65.9]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vV2lc-0008DF-Fh for qemu-devel@nongnu.org; Mon, 15 Dec 2025 02:13:13 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1765782793; x=1797318793; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=VcO5I41SMkUWDYwzgsYbLxVHGQ75PO+VCvmvvKQrwrc=; b=H+SHpTs6bTkKZL1qbO1zfqSgmLg+acIa7BMkpR5OHaFuleoT8AsUIZFh VK/9wRSqu96LHXQU+S1kDaO1Y1b6ncsyvgaGs++nYoxe+WIBPm2Ibn9fF JKDFZNno8B1B707B8FY7rtuxJLj7IoR3W8tF6RRjzY7wl3kupHgXUTTBM hKs2Dqbl7FOEfwEljKTzr4G4Gvv6NmLF+5Qg3m95KbYHl9b7kGGsV6oj9 GDhwtQ1LydiTTpskq0iB3qJP2NoYzbfRBhdJTgO6NWRm2+HVdizqAqzc3 aDWd2stefPz8d/tQUfHGUeF54BpQN35H0ktYrnJIEb7jbzKBssaTiHzQr g==; X-CSE-ConnectionGUID: A1XBW9T1SoSqdIBYooKl3g== X-CSE-MsgGUID: NYT072BPTSaw3kSYdKwztg== X-IronPort-AV: E=McAfee;i="6800,10657,11642"; a="90332254" X-IronPort-AV: E=Sophos;i="6.21,150,1763452800"; d="scan'208";a="90332254" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Dec 2025 23:13:12 -0800 X-CSE-ConnectionGUID: WDYFwABUTvCTaKI9OHx0JQ== X-CSE-MsgGUID: aTRJDeuxTv6HTqAAfZQGpw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,150,1763452800"; d="scan'208";a="197265952" Received: from liuzhao-optiplex-7080.sh.intel.com ([10.239.160.39]) by fmviesa007.fm.intel.com with ESMTP; 14 Dec 2025 23:13:10 -0800 From: Zhao Liu To: Paolo Bonzini , =?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?= Cc: qemu-devel@nongnu.org, Xudong Hao , Zhao Liu Subject: [PATCH v2 06/11] i386/cpu: Allow unsupported avx10_version with x-force-features Date: Mon, 15 Dec 2025 15:37:38 +0800 Message-Id: <20251215073743.4055227-7-zhao1.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20251215073743.4055227-1-zhao1.liu@intel.com> References: <20251215073743.4055227-1-zhao1.liu@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=198.175.65.9; envelope-from=zhao1.liu@intel.com; helo=mgamail.intel.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org The "force_features" ("x-force-features" property) forces setting feature even if host doesn't support, but also reports the warning. Given its function, it's useful for debug, so even if the AVX10 version is unsupported by host, force to set this AVX10 version if x-force-features=on. Tested-by: Xudong Hao Signed-off-by: Zhao Liu --- Changes since v1: * New patch. --- target/i386/cpu.c | 27 +++++++++++++++++++-------- 1 file changed, 19 insertions(+), 8 deletions(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index c47e06cb79e7..41ff4058871a 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -9500,16 +9500,27 @@ static bool x86_cpu_filter_features(X86CPU *cpu, bool verbose) uint8_t version = x86_cpu_get_host_avx10_version(); if (version < env->avx10_version) { - if (prefix) { - warn_report("%s: avx10.%d. Adjust to avx10.%d", - prefix, env->avx10_version, version); - } /* - * Discrete feature bits have been checked and filtered based on - * host support. So it's safe to change version without reverting - * other feature bits. + * With x-force-features=on, CPUID_7_1_EDX_AVX10 will not be masked + * off, so there's no need to zero avx10 version. */ - env->avx10_version = version; + if (!cpu->force_features) { + if (prefix) { + warn_report("%s: avx10.%d. Adjust to avx10.%d", + prefix, env->avx10_version, version); + } + /* + * Discrete feature bits have been checked and filtered based + * on host support. So it's safe to change version without + * reverting other feature bits. + */ + env->avx10_version = version; + } else { + if (prefix) { + warn_report("%s: avx10.%d.", + prefix, env->avx10_version); + } + } have_filtered_features = true; } } else if (env->avx10_version) { -- 2.34.1