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[147.75.80.249]) by mx.google.com with ESMTPS id t30-20020a50d71e000000b0056be5253030si45386edi.575.2024.03.22.10.56.38 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 Mar 2024 10:56:38 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel+bounces-111894-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) client-ip=147.75.80.249; Authentication-Results: mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=aneMZokY; arc=pass (i=1 dkim=pass dkdomain=intel.com dmarc=pass fromdomain=linux.intel.com); spf=pass (google.com: domain of linux-kernel+bounces-111894-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) smtp.mailfrom="linux-kernel+bounces-111894-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by am.mirrors.kernel.org (Postfix) with ESMTPS id 979161F22063 for ; Fri, 22 Mar 2024 17:56:38 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id BD8AE60B83; Fri, 22 Mar 2024 17:56:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="aneMZokY" Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7BF996089A for ; Fri, 22 Mar 2024 17:56:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.9 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711130192; cv=none; b=rrwuWnr0+9HVxg0tkfYqrmdLkSqGQmCcSGRFe/VPYoZQJf6zler/phPjuibs8R/k4OaG4vexiPRtRuTC5sDa5fhKmPLGsX2bwJUSy+Ayv9vfx6fPtL2Pq3wBmfjrm+XOz4ZbaTRUVCztXRVfbxWW4pBOpILIOXDzsPR34aWHalc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711130192; c=relaxed/simple; bh=ZER+XMKoV0uNq0dEunaVFRx+y5nNBpVo8wxZrWbW1S8=; h=Subject:To:Cc:From:Date:Message-Id; b=Rh7dGDFkEROhNZGt4wx6KZY6mPQBdz0OjPHpBL2oKscMduzVCVj6HPFm5mMEgJP25JtbMhJtpShERB54KIBfQUn+jLusfcvp3u95pgsMdv7TTEHnS0LoeKz162x9c1Y0f15T/+KJjxSPFHgxmkxZ+A52ng1GkUqi5lv78mmn5XY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=aneMZokY; arc=none smtp.client-ip=198.175.65.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1711130192; x=1742666192; h=subject:to:cc:from:date:message-id; bh=ZER+XMKoV0uNq0dEunaVFRx+y5nNBpVo8wxZrWbW1S8=; b=aneMZokYwVNYzoArV7r1UnTAHHsiAJTycjBzxTtjfBxcLdUe4u2F9SAb O1pvzCLNxG6QWecBdRxgq6e2qHR2SD52MOi/c7KvSzmALbKKSoBgfwyJi nbhjVJmhMd1XzZcHdlWFFaHkoodyNQqN9GSrOWjhy3/0H96j/rvqo5Gga JGVg8WrBim0Fv7UOqoctwIRNZRb6SrcSDNCjwVz1sZ2YkQXUlvdBHzVah 9zP9YNlOvB9RlTd8aGkF5/TnP2D+5CZNaWTIhmXgwUsOBeGRTH3ZP62bw Fd+jaLhvwH7z+MPxm3ju65oyL7MXzZTlp2Vm4lhk5Ou/SiNdVXfUInWzX A==; X-IronPort-AV: E=McAfee;i="6600,9927,11020"; a="28669672" X-IronPort-AV: E=Sophos;i="6.07,146,1708416000"; d="scan'208";a="28669672" Received: from orviesa006.jf.intel.com ([10.64.159.146]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Mar 2024 10:56:30 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,146,1708416000"; d="scan'208";a="15425568" Received: from davehans-spike.ostc.intel.com (HELO localhost.localdomain) ([10.165.164.11]) by orviesa006.jf.intel.com with ESMTP; 22 Mar 2024 10:56:30 -0700 Subject: [PATCH 0/4] x86: Add CPUID region helper and clarify Xen startup To: linux-kernel@vger.kernel.org Cc: jgross@suse.com,tglx@linutronix.de,x86@kernel.org,bp@alien8.de,Dave Hansen From: Dave Hansen Date: Fri, 22 Mar 2024 10:56:29 -0700 Message-Id: <20240322175629.01E8B39D@davehans-spike.ostc.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: This peels off a patches from the top of another longer series where Borislav suggested actually fixing a problem rather than complaining about it: https://lore.kernel.org/all/20240307162752.GAZenrCDqs0lMTjmu1@fat_crate.local/ There's a little detour here to explain some mysterious (to me) CPUID prodding. The end result gets rid of some fragile Xen boot code. It also clears the way for a future series to bring some order to the early boot code and remove some of the random tinkering that is there today.