From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from baidu.com (mx24.baidu.com [111.206.215.185]) (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 F0EE915A8 for ; Sat, 16 Aug 2025 00:16:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=111.206.215.185 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755303398; cv=none; b=eLOKSCe8JXwOuBWsLkslrlHuMYjsOqiI/MFk2J8HySpeWbsrM6zFeifbEkkM+KkkyHUwwzzdKcxg8sweyTkSOBaEn2jem/B0fZIzVKQsqEDWXoUxoDBhRH1uBFICIh9lLkpYkT+RTCyaBRB1HtrULnvwDEy/g69S6GXp5xXq6xI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755303398; c=relaxed/simple; bh=y8isc9z85O0HGhdnNW3E2I+l3vWgPGE5+cOMZia7esY=; h=From:To:CC:Subject:Date:Message-ID:Content-Type:MIME-Version; b=q2HS+B2uIIQvqKFR0e/uFWYzR1G01qSH1oLSlTQPkJWpk0E6wtJed2jnMmE9dMpvd5Vfgdh/t9XHqFMR8w2FH6FC6pDsYllAZhObhgHpOKLPv5Wl6mJcQ2MTa1JFm0CAJBGrWhG88o6bRyp6pAnNeh6BosZ7BPr7AvdMa82lYUc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=baidu.com; spf=pass smtp.mailfrom=baidu.com; arc=none smtp.client-ip=111.206.215.185 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=baidu.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=baidu.com From: "Li,Rongqing" To: Pawan Gupta CC: "tglx@linutronix.de" , "bp@alien8.de" , "peterz@infradead.org" , "jpoimboe@kernel.org" , "mingo@redhat.com" , "dave.hansen@linux.intel.com" , "x86@kernel.org" , "hpa@zytor.com" , "david.kaplan@amd.com" , "linux-kernel@vger.kernel.org" Subject: RE: Re: [????] Re: [PATCH] x86/bugs: Fix GDS mitigation check for CPUs without ARCH_CAP_GDS_CTRL Thread-Topic: Re: [????] Re: [PATCH] x86/bugs: Fix GDS mitigation check for CPUs without ARCH_CAP_GDS_CTRL Thread-Index: AdwOQrts3RmaX2f/Rn6fQ4EXML6jwA== Date: Sat, 16 Aug 2025 00:15:20 +0000 Message-ID: <2a53cf1c48b44ea4b12debeed7521d50@baidu.com> Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-FEAS-Client-IP: 172.31.50.48 X-FE-Policy-ID: 52:10:53:SYSTEM DQo+IA0KPiBIb3cgaXMgdGhhdCBhIHByb2JsZW0/IFRoYXQgaXMgaG93IGl0IHdhcyBvcmlnaW5h bGx5IGltcGxlbWVudGVkLg0KPiANCj4gSW5mYWN0LCB0aGUgZm9sbG93aW5nIGNoZWNrcyBhcmUg cmVxdWlyZWQgZm9yIHRoZSBjb3JyZWN0IGJlaGF2aW9yOg0KDQoNCllvdSBhcmUgcmlnaHQsIEkg d2lsbCByZXNlbmQgdGhpcyBwYXRjaA0KDQpUaGFua3MNCg0KLUxpDQoNCj4gDQo+ICAgICAgICAg IGlmIChtY3VfY3RybCAmIEdEU19NSVRHX0xPQ0tFRCkgew0KPiAgICAgICAgICAgICAgICAgIGlm IChnZHNfbWl0aWdhdGlvbiA9PSBHRFNfTUlUSUdBVElPTl9PRkYpDQo+ICAgICAgICAgICAgICAg ICAgICAgICAgICBwcl93YXJuKCJNaXRpZ2F0aW9uIGxvY2tlZC4gRGlzYWJsZSBmYWlsZWQuXG4i KTsNCj4gCS4uLg0KPiAgICAgICAgICAgICAgICAgIGdkc19taXRpZ2F0aW9uID0gR0RTX01JVElH QVRJT05fRlVMTF9MT0NLRUQ7DQo+ICAgICAgICAgIH0NCj4gDQo+IElmIHRoZSBHRFMgbWljcm9j b2RlIG1pdGlnYXRpb24gaXMgbG9ja2VkIGJlZm9yZSB0aGUga2VybmVsIGJvb3QsIE1TUiB3cml0 ZSBmb3INCj4gT0ZGIHdpbGwgbm90IHRha2UgZWZmZWN0IGFueXdheXMuIEFuZCB5b3UgcmVwb3J0 IE9GRiB3aGVuIHRoZSBtaXRpZ2F0aW9uIGlzDQo+IGxvY2tlZCB0byBPTi4gV2hpbGUgYWxzbyB0 cmlnZ2VyaW5nIGJlbG93IFdBUk5fT05fT05DRSgpOg0KPiANCj4gdXBkYXRlX2dkc19tc3IoKQ0K PiB7DQo+IC4uLg0KPiAgICAgICAgICAvKg0KPiAgICAgICAgICAgKiBDaGVjayB0byBtYWtlIHN1 cmUgdGhhdCB0aGUgV1JNU1IgdmFsdWUgd2FzIG5vdCBpZ25vcmVkLg0KPiBXcml0ZXMgdG8NCj4g ICAgICAgICAgICogR0RTX01JVEdfRElTIHdpbGwgYmUgaWdub3JlZCBpZiB0aGlzIHByb2Nlc3Nv ciBpcyBsb2NrZWQgYnV0IHRoZQ0KPiBib290DQo+ICAgICAgICAgICAqIHByb2Nlc3NvciB3YXMg bm90Lg0KPiAgICAgICAgICAgKi8NCj4gICAgICAgICAgcmRtc3JxKE1TUl9JQTMyX01DVV9PUFRf Q1RSTCwgbWN1X2N0cmxfYWZ0ZXIpOw0KPiAgICAgICAgICBXQVJOX09OX09OQ0UobWN1X2N0cmwg IT0gbWN1X2N0cmxfYWZ0ZXIpOw0K