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[209.51.188.17]) by mx.google.com with ESMTPS id dl7-20020a05620a1d0700b007671d7c2370si5849713qkb.198.2023.08.22.00.22.33 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Tue, 22 Aug 2023 00:22:33 -0700 (PDT) Received-SPF: pass (google.com: domain of qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; Authentication-Results: mx.google.com; spf=pass (google.com: domain of qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org" Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qYLie-0003Rx-NB; Tue, 22 Aug 2023 03:22:29 -0400 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 1qYLid-0003Rb-Ll for qemu-arm@nongnu.org; Tue, 22 Aug 2023 03:22:27 -0400 Received: from zg8tmtyylji0my4xnjqumte4.icoremail.net ([162.243.164.118]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qYLia-0005Ar-6x for qemu-arm@nongnu.org; Tue, 22 Aug 2023 03:22:27 -0400 Received: from prodtpl.icoremail.net (unknown [10.12.1.20]) by hzbj-icmmx-7 (Coremail) with SMTP id AQAAfwCXeaofYuRkfDUhAA--.12388S2; Tue, 22 Aug 2023 15:22:07 +0800 (CST) Received: from WYQ-S (unknown [218.76.62.144]) by mail (Coremail) with SMTP id AQAAfwDHTiYaYuRkKkQAAA--.2837S3; Tue, 22 Aug 2023 15:22:02 +0800 (CST) Date: Tue, 22 Aug 2023 15:22:02 +0800 From: "Yuquan Wang" To: "gregory.price@memverge.com" Cc: qemu-arm , jonathan.cameron Subject: Re: CXL Namespaces of ACPI disappearing in Qemu demo X-Priority: 3 X-GUID: 869501CA-C6AB-40D6-8D54-1763B8C6712E X-Has-Attach: no X-Mailer: Foxmail 7.2.25.228[cn] Mime-Version: 1.0 Message-ID: <2023082215220191352877@phytium.com.cn> Content-Type: multipart/alternative; boundary="----=_001_NextPart656276802654_=----" X-CM-TRANSID: AQAAfwDHTiYaYuRkKkQAAA--.2837S3 X-CM-SenderInfo: 5zdqw5pxtxt0arstlqxsk13x1xpou0fpof0/1tbiAQATAWTjtyYCIwABsl Authentication-Results: hzbj-icmmx-7; spf=neutral smtp.mail=wangyuquan 1236@phytium.com.cn; X-Coremail-Antispam: 1Uk129KBjvdXoWrAw43CFWrCrykZFWxZF4xZwb_yoWxGFb_ur 9rKryIgrs7CFZag39Ikr13XrykCrZakFW5GF43WFn7Jr1jyr4xGF92g3s3u345Kr12grZ5 ua1jqa1fua9a9jkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8wcxFpf9Il3svdxBIdaVrnU Uv73VFW2AGmfu7jjvjm3AaLaJ3UjIYCTnIWjDUYxBIdaVFxhVjvjDU0xZFpf9x0zRUUUUU UUUU= Received-SPF: pass client-ip=162.243.164.118; envelope-from=wangyuquan1236@phytium.com.cn; helo=zg8tmtyylji0my4xnjqumte4.icoremail.net X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, HTML_FONT_LOW_CONTRAST=0.001, HTML_MESSAGE=0.001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_KAM_HTML_FONT_INVALID=0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-arm@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-arm-bounces+alex.bennee=linaro.org@nongnu.org Sender: qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org X-TUID: jt7H0B0acn+S This is a multi-part message in MIME format. ------=_001_NextPart656276802654_=---- Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: base64 SGksIEdyZWdvcnkNCkkgYW0gc29ycnkgdG8gZGlzdHVyYiB5b3UsIGJ1dCB0aGVyZSB3YXMgc3Rp bGwgYW4gaWdub3JlZCBwcm9ibGVtIGFib3V0IENYTCwgDQpBbHRob3VnaCBJIGhhZCBzZW50IGFu IGVtYWlsIHRvIGpvbmF0aGFuIChtYXliZSBoZSBpcyBidXN5IHJlY2VudGx5IHNvIGhlIGZvcmdv dCB0byByZXBseSksICANCnRoZSBMaW5rIGlzIDogaHR0cHM6Ly9saXN0cy5ub25nbnUub3JnL2Fy Y2hpdmUvaHRtbC9xZW11LWFybS8yMDIzLTA4L21zZzAwMjc4Lmh0bWwgDQoNCk1heWJlIHRoZSBj b3JlIHF1ZXN0aW9uIGlzIHRoYXQgaG93IHNob3VsZCB3ZSB1c2UgQ1hMIGNvbXBvbmVudHMgd2l0 aCBhIHN0YW5kYXJkIFBDSWUgc3lzdGVt77yaDQoxKSBJbiBRZW11LCBzaW5jZSB0aGUgYm9hcmRz IG9yIG1hY2hpbmVzIGluIHFlbXUgY2FuIG9ubHkgdXNlIHB4Yi1jeGwgKGF0dGFjaGVkIG9uIHBj aWUuMCkgdG8gYWRkDQpjeGwgaG9zdCBicmlkZ2UsIHRoZXJlZm9yZSwgdXNlcnMgc2hvdWxkIGF2 b2lkIHRvIGFzc2lnbiBhbiBvY2N1cGllZCBidXMgbnVtYmVyIGJ5IG90aGVyIGRldmljZXMNCnRv IHB4Yi1jeGwuDQoNCjIpIEluIHJlYWwgaGFyZHdhcmUsIENYTCBjb21wb25lbnRzIHNob3VsZCB1 c2UgaW5kZXBlbmRlbnQgQ1hMIHJvb3QvdHJlZSAoQUNQSTAwMTcmQUNQSTAwMTYpDQp0byBzZXBh cmF0ZSBmcm9tIHRoZSBuYW1lc3BhY2Ugb2YgZGVmYXVsdCBwY2llIHJvb3QvZG9tYWluLg0KDQpJ IHdvdWxkIGJlIGdyYXRlZnVsIGlmIHlvdSBoYXZlIHNvbWUgZnJlZSB0aW1lIHRvIGhlbHAgY2hl Y2sgdGhpcyBpc3N1ZSA6ICkNCg0KDQoNCg== ------=_001_NextPart656276802654_=---- Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable = =0A =0A
Hi, Gregory
I am sorry to dis= turb you, but there = was still an ignored problem about CXL, 
Although I had sent an email to j= onathan (maybe he is busy recently so he forgot to reply),  

Maybe the co= re question is that how should we use CXL components with a standard PCIe system=EF=BC=9A=
1) In Qemu, since the boards or machines in qemu can only use p= xb-cxl (attached on pcie.0) to add
cxl host bridge, therefore, users should avoid to assign an occu= pied bus number by other devices
to pxb-= cxl.

2) In real hardware, CXL components should use independent=  CXL root/tree = (ACPI0017&ACPI0016)
to default pcie root/domain.

<= /div>
I would be grateful if you have some free time to help check this= issue : )



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