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Thu, 23 Oct 2025 10:27:17 -0700 (PDT) Date: Thu, 23 Oct 2025 10:27:16 -0700 In-Reply-To: <707a01ee36c28863bdc6a4444a5560e9a0b19597.camel@intel.com> Mime-Version: 1.0 References: <20251017003244.186495-1-seanjc@google.com> <20251017003244.186495-15-seanjc@google.com> <707a01ee36c28863bdc6a4444a5560e9a0b19597.camel@intel.com> Message-ID: Subject: Re: [PATCH v3 14/25] KVM: TDX: Bug the VM if extended the initial measurement fails From: Sean Christopherson To: Rick P Edgecombe Cc: "chenhuacai@kernel.org" , "frankja@linux.ibm.com" , "maz@kernel.org" , "borntraeger@linux.ibm.com" , "pjw@kernel.org" , "aou@eecs.berkeley.edu" , "kas@kernel.org" , "maobibo@loongson.cn" , "pbonzini@redhat.com" , "maddy@linux.ibm.com" , "palmer@dabbelt.com" , "imbrenda@linux.ibm.com" , "zhaotianrui@loongson.cn" , "anup@brainfault.org" , "oliver.upton@linux.dev" , "kvm@vger.kernel.org" , "linux-coco@lists.linux.dev" , Kai Huang , Yan Y Zhao , "michael.roth@amd.com" , "linux-kernel@vger.kernel.org" , Ira Weiny , "loongarch@lists.linux.dev" , "binbin.wu@linux.intel.com" , "ackerleytng@google.com" , "kvmarm@lists.linux.dev" , Vishal Annapurve , "kvm-riscv@lists.infradead.org" , "linuxppc-dev@lists.ozlabs.org" , "linux-arm-kernel@lists.infradead.org" , "linux-mips@vger.kernel.org" , "linux-riscv@lists.infradead.org" , "x86@kernel.org" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251023_173153_683801_BB47329B X-CRM114-Status: GOOD ( 19.43 ) X-BeenThere: kvm-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "kvm-riscv" Errors-To: kvm-riscv-bounces+kvm-riscv=archiver.kernel.org@lists.infradead.org T24gVHVlLCBPY3QgMjEsIDIwMjUsIFJpY2sgUCBFZGdlY29tYmUgd3JvdGU6Cj4gT24gVGh1LCAy MDI1LTEwLTE2IGF0IDE3OjMyIC0wNzAwLCBTZWFuIENocmlzdG9waGVyc29uIHdyb3RlOgo+ID4g V0FSTiBhbmQgdGVybWluYXRlIHRoZSBWTSBpZiBUREhfTVJfRVhURU5EIGZhaWxzLCBhcyBleHRl bmRpbmcgdGhlCj4gPiBtZWFzdXJlbWVudCBzaG91bGQgZmFpbCBpZiBhbmQgb25seSBpZiB0aGVy ZSBpcyBhIEtWTSBidWcsIG9yIGlmIHRoZSBTLUVQVAo+ID4gbWFwcGluZyBpcyBpbnZhbGlkLCBh bmQgaXQgc2hvdWxkIGJlIGltcG9zc2libGUgZm9yIHRoZSBTLUVQVCBtYXBwaW5ncyB0bwo+ID4g YmUgcmVtb3ZlZCBiZXR3ZWVuIGt2bV90ZHBfbW11X21hcF9wcml2YXRlX3BmbigpIGFuZCB0ZGhf bXJfZXh0ZW5kKCkuCj4gPiAKPiA+IEhvbGRpbmcgc2xvdHNfbG9jayBwcmV2ZW50cyB6YXBzIGR1 ZSB0byBtZW1zbG90IHVwZGF0ZXMsCj4gPiBmaWxlbWFwX2ludmFsaWRhdGVfbG9jaygpIHByZXZl bnRzIHphcHMgZHVlIHRvIGd1ZXN0X21lbWZkIFBVTkNIX0hPTEUsCj4gPiBhbmQgYWxsIHVzYWdl IG9mIGt2bV96YXBfZ2ZuX3JhbmdlKCkgaXMgbXV0dWFsbHkgZXhjbHVzaXZlIHdpdGggUy1FUFQK PiA+IGVudHJpZXMgdGhhdCBjYW4gYmUgdXNlZCBmb3IgdGhlIGluaXRpYWwgaW1hZ2UuwqAgVGhl IGNhbGwgZnJvbSBzZXYuYyBpcwo+ID4gb2J2aW91c2x5IG11dHVhbGx5IGV4Y2x1c2l2ZSwgVERY IGRpc2FsbG93cyBLVk1fWDg2X1FVSVJLX0lHTk9SRV9HVUVTVF9QQVQKPiA+IHNvIHNhbWUgZ29l cyBmb3Iga3ZtX25vbmNvaGVyZW50X2RtYV9hc3NpZ25tZW50X3N0YXJ0X29yX3N0b3AsIGFuZCB3 aGlsZQo+ID4gX19rdm1fc2V0X29yX2NsZWFyX2FwaWN2X2luaGliaXQoKSBjYW4gbGlrZWx5IGJl IHRyaXBwZWQgd2hpbGUgYnVpbGRpbmcgdGhlCj4gPiBpbWFnZSwgdGhlIEFQSUMgcGFnZSBoYXMg aXRzIG93biBub24tZ3Vlc3RfbWVtZmQgbWVtc2xvdCBhbmQgc28gY2FuJ3QgYmUKPiA+IHVzZWQg Zm9yIHRoZSBpbml0aWFsIGltYWdlLCB3aGljaCBtZWFucyB0aGF0IHRvbyBpcyBtdXR1YWxseSBl eGNsdXNpdmUuCj4gPiAKPiA+IE9wcG9ydHVuaXN0aWNhbGx5IHN3aXRjaCB0byAiZ290byIgdG8g anVtcCBhcm91bmQgdGhlIG1lYXN1cmVtZW50IGNvZGUsCj4gPiBwYXJ0bHkgdG8gbWFrZSBpdCBj bGVhciB0aGF0IEtWTSBuZWVkcyB0byBiYWlsIGVudGlyZWx5IGlmIGV4dGVuZGluZyB0aGUKPiA+ IG1lYXN1cmVtZW50IGZhaWxzLCBwYXJ0bHkgaW4gYW50aWNpcGF0aW9uIG9mIHJld29ya2luZyBo b3cgYW5kIHdoZW4KPiA+IFRESF9NRU1fUEFHRV9BREQgaXMgZG9uZS4KPiA+IAo+ID4gRml4ZXM6 IGQ3ODlmYTZlZmFjOSAoIktWTTogVERYOiBIYW5kbGUgdkNQVSBkaXNzb2NpYXRpb24iKQo+ID4g U2lnbmVkLW9mZi1ieTogWWFuIFpoYW8gPHlhbi55LnpoYW9AaW50ZWwuY29tPgo+ID4gU2lnbmVk LW9mZi1ieTogU2VhbiBDaHJpc3RvcGhlcnNvbiA8c2VhbmpjQGdvb2dsZS5jb20+Cj4gPiAtLS0K PiAKPiBQZXIgdGhlIGRpc2N1c3Npb24gaW4gdjIsIHNob3VsZG4ndCBpdCBnbyBhZnRlciBwYXRj aCAyNCAnS1ZNOiBURFg6IEd1YXJkIFZNCj4gc3RhdGUgdHJhbnNpdGlvbnMgd2l0aCAiYWxsIiB0 aGUgbG9ja3MnPyBPdGhlcndpc2UgaXQgaW50cm9kdWNlcyBhIEtWTV9CVUdfT04oKQo+IHRoYXQg Y2FuIGJlIHRyaWdnZXJlZCBmcm9tIHVzZXJzcGFjZS4gbm90IGEgaHVnZSBkZWFsIHRob3VnaC4K Ck9oLCByaWdodC4gIEFuZCB0aGVuIHRoZSBjaGFuZ2Vsb2cgbmVlZHMgdG8gYmUgdXBkYXRlZCB0 b28uCgotLSAKa3ZtLXJpc2N2IG1haWxpbmcgbGlzdAprdm0tcmlzY3ZAbGlzdHMuaW5mcmFkZWFk Lm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2t2bS1yaXNj dgo=