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Thu, 30 Oct 2025 16:40:42 -0700 (PDT) Date: Thu, 30 Oct 2025 16:40:40 -0700 In-Reply-To: <6572689b28a76bd95bc653b1fc1131fa57ed7669.camel@intel.com> Mime-Version: 1.0 References: <20251030200951.3402865-1-seanjc@google.com> <20251030200951.3402865-13-seanjc@google.com> <6572689b28a76bd95bc653b1fc1131fa57ed7669.camel@intel.com> Message-ID: Subject: Re: [PATCH v4 12/28] KVM: TDX: WARN if mirror SPTE doesn't have full RWX when creating S-EPT mapping From: Sean Christopherson To: Kai Huang 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" , Yan Y Zhao , "michael.roth@amd.com" , "binbin.wu@linux.intel.com" , Ira Weiny , "loongarch@lists.linux.dev" , "ackerleytng@google.com" , "kvmarm@lists.linux.dev" , "linux-kernel@vger.kernel.org" , "kvm-riscv@lists.infradead.org" , Vishal Annapurve , "linuxppc-dev@lists.ozlabs.org" , "linux-arm-kernel@lists.infradead.org" , "linux-mips@vger.kernel.org" , Rick P Edgecombe , "linux-riscv@lists.infradead.org" , "x86@kernel.org" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251030_164044_116121_225E4C3A X-CRM114-Status: GOOD ( 14.26 ) X-BeenThere: linux-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: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org T24gVGh1LCBPY3QgMzAsIDIwMjUsIEthaSBIdWFuZyB3cm90ZToKPiBPbiBUaHUsIDIwMjUtMTAt MzAgYXQgMTM6MDkgLTA3MDAsIFNlYW4gQ2hyaXN0b3BoZXJzb24gd3JvdGU6Cj4gPiBQYXNzIGlu IHRoZSBtaXJyb3Jfc3B0ZSB0byBrdm1feDg2X29wcy5zZXRfZXh0ZXJuYWxfc3B0ZSgpIHRvIHBy b3ZpZGUKPiA+IHN5bW1ldHJ5IHdpdGggLnJlbW92ZV9leHRlcm5hbF9zcHRlKCksIGFuZCBhc3Nl cnQgaW4gVERYIHRoYXQgdGhlIG1pcnJvcgo+ID4gU1BURSBpcyBzaGFkb3ctcHJlc2VudCB3aXRo IGZ1bGwgUldYIHBlcm1pc3Npb25zICh0aGUgVERYLU1vZHVsZSBkb2Vzbid0Cj4gPiBhbGxvdyB0 aGUgaHlwZXJ2aXNvciB0byBjb250cm9sIHByb3RlY3Rpb25zKS4KPiA+IAo+ID4gU2lnbmVkLW9m Zi1ieTogU2VhbiBDaHJpc3RvcGhlcnNvbiA8c2VhbmpjQGdvb2dsZS5jb20+Cj4gCj4gUmV2aWV3 ZWQtYnk6IEthaSBIdWFuZyA8a2FpLmh1YW5nQGludGVsLmNvbT4KPiAKPiBbLi4uXQo+IAo+ID4g IHN0YXRpYyBpbnQgdGR4X3NlcHRfc2V0X3ByaXZhdGVfc3B0ZShzdHJ1Y3Qga3ZtICprdm0sIGdm bl90IGdmbiwKPiA+IC0JCQkJICAgICBlbnVtIHBnX2xldmVsIGxldmVsLCBrdm1fcGZuX3QgcGZu KQo+ID4gKwkJCQkgICAgIGVudW0gcGdfbGV2ZWwgbGV2ZWwsIHU2NCBtaXJyb3Jfc3B0ZSkKPiA+ ICB7Cj4gPiAgCXN0cnVjdCBrdm1fdGR4ICprdm1fdGR4ID0gdG9fa3ZtX3RkeChrdm0pOwo+ID4g Kwlrdm1fcGZuX3QgcGZuID0gc3B0ZV90b19wZm4obWlycm9yX3NwdGUpOwo+ID4gIAo+ID4gIAkv KiBUT0RPOiBoYW5kbGUgbGFyZ2UgcGFnZXMuICovCj4gPiAgCWlmIChLVk1fQlVHX09OKGxldmVs ICE9IFBHX0xFVkVMXzRLLCBrdm0pKQo+ID4gIAkJcmV0dXJuIC1FSU87Cj4gPiAgCj4gPiArCVdB Uk5fT05fT05DRSghaXNfc2hhZG93X3ByZXNlbnRfcHRlKG1pcnJvcl9zcHRlKSB8fAo+ID4gKwkJ ICAgICAobWlycm9yX3NwdGUgJiBWTVhfRVBUX1JXWF9NQVNLKSAhPSBWTVhfRVBUX1JXWF9NQVNL KTsKPiA+ICsKPiAKPiBOaXQ6wqAKPiAKPiBJIGFtIGEgbGl0dGxlIGJpdCBjb25mdXNlZCBhYm91 dCB3aGVuIHRvIHVzZSBXQVJOX09OX09OQ0UoKSBhbmQKPiBLVk1fQlVHX09OKCkuIDotKQoKVmVy eSBsb29zZWx5OiBXQVJOIGlmIHRoZXJlJ3MgYSBkZWNlbnQgY2hhbmNlIGNhcnJ5aW5nIG9uIG1p Z2h0IGJlIGZpbmUsCktWTV9CVUdfT04oKSBpZiB0aGVyZSdzIGEgZ29vZCBjaGFuY2UgY2Fycnlp bmcgb24gd2lsbCBjcmFzaCB0aGUgaG9zdCBhbmQvb3IKY29ycnVwdCB0aGUgZ3Vlc3QsIGUuZy4g aWYgS1ZNIHN1c3BlY3RzIGEgaGFyZHdhcmUvVERYLU1vZHVsZSBpc3N1ZS4KCl9fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4LXJpc2N2IG1haWxpbmcg bGlzdApsaW51eC1yaXNjdkBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRl YWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtcmlzY3YK