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[176.247.58.172]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ab2c905ec66sm155545766b.18.2025.01.10.02.34.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 Jan 2025 02:34:25 -0800 (PST) Message-ID: <173ba3b7c890f1ec523853b3a12859eb309cd563.camel@gmail.com> Subject: Re: [PATCH v2 24/25] KVM: x86: Introduce KVM_TDX_GET_CPUID From: Francesco Lavra To: Xiaoyao Li , rick.p.edgecombe@intel.com Cc: isaku.yamahata@gmail.com, kai.huang@intel.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, pbonzini@redhat.com, reinette.chatre@intel.com, seanjc@google.com, tony.lindgren@linux.intel.com, yan.y.zhao@intel.com Date: Fri, 10 Jan 2025 11:34:24 +0100 In-Reply-To: <7574968a-f0e2-49d5-b740-2454a0f70bb6@intel.com> References: <7574968a-f0e2-49d5-b740-2454a0f70bb6@intel.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: base64 User-Agent: Evolution 3.46.4-2 Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 T24gRnJpLCAyMDI1LTAxLTEwIGF0IDEyOjI5ICswODAwLCBYaWFveWFvIExpIHdyb3RlOgo+IE9u IDEvOS8yMDI1IDc6MDcgUE0sIEZyYW5jZXNjbyBMYXZyYSB3cm90ZToKPiA+IE9uIDIwMjQtMTAt MzAgYXQgMTk6MDAsIFJpY2sgRWRnZWNvbWJlIHdyb3RlOgo+ID4gPiBAQCAtMTA1NSw2ICsxMTQ0 LDgxIEBAIHN0YXRpYyBpbnQgdGR4X3RkX3ZjcHVfaW5pdChzdHJ1Y3QKPiA+ID4ga3ZtX3ZjcHUK PiA+ID4gKnZjcHUsIHU2NCB2Y3B1X3JjeCkKPiA+ID4gwqDCoMKgwqDCoMKgwqDCoHJldHVybiBy ZXQ7Cj4gPiA+IMKgIH0KPiA+ID4gwqAgCj4gPiA+ICsvKiBTb21ldGltZXMgcmVhZHMgbXVsdGlw cGxlIHN1YmxlYWZzLiBSZXR1cm4gaG93IG1hbnkgZW50aWVzCj4gPiA+IHdlcmUKPiA+ID4gd3Jp dHRlbi4gKi8KPiA+ID4gK3N0YXRpYyBpbnQgdGR4X3ZjcHVfZ2V0X2NwdWlkX2xlYWYoc3RydWN0 IGt2bV92Y3B1ICp2Y3B1LCB1MzIKPiA+ID4gbGVhZiwKPiA+ID4gaW50IG1heF9jbnQsCj4gPiA+ ICvCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqAgc3RydWN0IGt2bV9jcHVpZF9lbnRyeTIKPiA+ID4gKm91dHB1dF9lKQo+ID4g PiArewo+ID4gPiArwqDCoMKgwqDCoMKgwqBpbnQgaTsKPiA+ID4gKwo+ID4gPiArwqDCoMKgwqDC oMKgwqBpZiAoIW1heF9jbnQpCj4gPiA+ICvCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqBy ZXR1cm4gMDsKPiA+ID4gKwo+ID4gPiArwqDCoMKgwqDCoMKgwqAvKiBGaXJzdCB0cnkgd2l0aG91 dCBhIHN1YmxlYWYgKi8KPiA+ID4gK8KgwqDCoMKgwqDCoMKgaWYgKCF0ZHhfcmVhZF9jcHVpZCh2 Y3B1LCBsZWFmLCAwLCBmYWxzZSwgb3V0cHV0X2UpKQo+ID4gPiArwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgcmV0dXJuIDE7Cj4gPiA+ICsKPiA+ID4gK8KgwqDCoMKgwqDCoMKgLyoKPiA+ ID4gK8KgwqDCoMKgwqDCoMKgICogSWYgdGhlIHRyeSB3aXRob3V0IGEgc3VibGVhZiBmYWlsZWQs IHRyeSByZWFkaW5nCj4gPiA+IHN1YmxlYWZzCj4gPiA+IHVudGlsCj4gPiA+ICvCoMKgwqDCoMKg wqDCoCAqIGZhaWx1cmUuIFRoZSBURFggbW9kdWxlIG9ubHkgc3VwcG9ydHMgNiBiaXRzIG9mCj4g PiA+IHN1YmxlYWYKPiA+ID4gaW5kZXguCj4gPiAKPiA+IEl0IGFjdHVhbGx5IHN1cHBvcnRzIDcg Yml0cywgaS5lLiBiaXRzIDY6MCwgc28gdGhlIGxpbWl0IGJlbG93Cj4gPiBzaG91bGQKPiA+IGJl IDBiMTExMTExMS4KPiAKPiBOaWNlIGNhdGNoIQo+IAo+ID4gPiArwqDCoMKgwqDCoMKgwqAgKi8K PiA+ID4gK8KgwqDCoMKgwqDCoMKgZm9yIChpID0gMDsgaSA8IDBiMTExMTExOyBpKyspIHsKPiA+ ID4gK8KgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoGlmIChpID4gbWF4X2NudCkKPiA+ID4g K8KgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqBnb3RvIG91dDsK PiA+IAo+ID4gVGhpcyB3aWxsIG1ha2UgdGhpcyBmdW5jdGlvbiByZXR1cm4gKG1heF9jbnQgKyAx KSBpbnN0ZWFkIG9mCj4gPiBtYXhfY250Lgo+ID4gSSB0aGluayB0aGUgY29kZSB3b3VsZCBiZSBz aW1wbGVyIGlmIG1heF9jbnQgd2FzIGluaXRpYWxpemVkIHRvCj4gPiBtaW4obWF4X2NudCwgMHg4 MCkgKGJlY2F1c2UgMHg3ZiBpcyBhIHN1cHBvcnRlZCBzdWJsZWFmIGluZGV4LCBhcwo+ID4gZmFy Cj4gPiBhcyBJIGNhbiB0ZWxsKSwgYW5kIHRoZSBmb3IoKSBjb25kaXRpb24gd2FzIGNoYW5nZWQg dG8gYGkgPAo+ID4gbWF4X2NudGAuCj4gCj4gTG9va3MgYmV0dGVyLgoKWW91IGNvdWxkIGV2ZW4g c2ltcGxpZnkgdGhpcyBmdW5jdGlvbiBmdXJ0aGVyIGJ5IHJlbW92aW5nIHRoZSA3LWJpdApsaW1p dCBhbHRvZ2V0aGVyIGFuZCByZWx5aW5nIG9uIHRkeF9yZWFkX2NwdWlkKCkgcmV0dXJuaW5nIGZh aWx1cmUgd2hlbgp0aGUgc3VibGVhZiBpbmRleCBpcyBub3Qgc3VwcG9ydGVkIChkdWUgdG8gdGhl ClREWF9NRF9VTlJFQURBQkxFX1NVQkxFQUZfTUFTSyBjaGVjaykuCj4gCj4gPiA+ICvCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAvKiBLZWVwIHJlYWRpbmcgc3VibGVhZnMgdW50aWwgdGhl cmUgaXMgYQo+ID4gPiBmYWlsdXJlLgo+ID4gPiAqLwo+ID4gPiArwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgaWYgKHRkeF9yZWFkX2NwdWlkKHZjcHUsIGxlYWYsIGksIHRydWUsCj4gPiA+ IG91dHB1dF9lKSkKPiA+ID4gK8KgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqByZXR1cm4gaTsKPiA+ID4gKwo+ID4gPiArwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgb3V0cHV0X2UrKzsKPiAKPiBoZXJlIHRoZSBvdXRwdXRfZSsrIGNhbiBvdmVyZmxvdyB0 aGUgYnVmZmVyLgoKTm90IGlmIHRoZSBmb3IoKSBsb29wIHRlcm1pbmF0ZXMgd2hlbiBpIHJlYWNo ZXMgbWF4X2NudC4KCg==