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[34.78.232.44]) by smtp.gmail.com with ESMTPSA id b7-20020a5d4b87000000b00314374145e0sm5614126wrt.67.2023.07.04.07.18.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 04 Jul 2023 07:18:13 -0700 (PDT) Date: Tue, 4 Jul 2023 14:18:09 +0000 From: Mostafa Saleh To: Sudeep Holla Cc: maz@kernel.org, oliver.upton@linux.dev, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org, tabba@google.com, qperret@google.com, will@kernel.org, catalin.marinas@arm.com, yuzenghui@huawei.com, suzuki.poulose@arm.com, james.morse@arm.com, bgardon@google.com, gshan@redhat.com Subject: Re: [PATCH v3] KVM: arm64: Use BTI for nvhe Message-ID: References: <20230530150845.2856828-1-smostafa@google.com> <20230704134136.a5znw4jupt5yp5kg@bogus> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20230704134136.a5znw4jupt5yp5kg@bogus> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230704_071818_274994_68F6356A X-CRM114-Status: GOOD ( 31.53 ) X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org SGkgU3VkZWVwLAoKT24gVHVlLCBKdWwgMDQsIDIwMjMgYXQgMDI6NDE6MzZQTSArMDEwMCwgU3Vk ZWVwIEhvbGxhIHdyb3RlOgo+IE9uIFR1ZSwgTWF5IDMwLCAyMDIzIGF0IDAzOjA4OjQ1UE0gKzAw MDAsIE1vc3RhZmEgU2FsZWggd3JvdGU6Cj4gPiBDT05GSUdfQVJNNjRfQlRJX0tFUk5FTCBjb21w aWxlcyB0aGUga2VybmVsIHRvIHN1cHBvcnQgQVJNdjguNS1CVEkuCj4gPiBIb3dldmVyLCB0aGUg bnZoZSBjb2RlIGRvZXNuJ3QgbWFrZSB1c2Ugb2YgaXQgYXMgaXQgZG9lc24ndCBtYXAgYW55Cj4g PiBwYWdlcyB3aXRoIEd1YXJkZWQgUGFnZShHUCkgYml0Lgo+ID4gCj4gPiBrdm0gcGd0YWJsZSBj b2RlIGlzIG1vZGlmaWVkIHRvIG1hcCBleGVjdXRhYmxlIHBhZ2VzIHdpdGggR1AgYml0Cj4gPiBp ZiBCVEkgaXMgZW5hYmxlZCBmb3IgdGhlIGtlcm5lbC4KPiA+IAo+ID4gQXQgaHlwIGluaXQsIFND VExSX0VMMi5CVCBpcyBzZXQgdG8gMSB0byBtYXRjaCBFTDEgY29uZmlndXJhdGlvbgo+ID4gKFND VExSX0VMMS5CVDEpIHNldCBpbiBidGlfZW5hYmxlKCkuCj4gPiAKPiA+IE9uZSBkaWZmZXJlbmNl IGJldHdlZW4ga2VybmVsIGFuZCBudmhlIGNvZGUsIGlzIHRoYXQgdGhlIGtlcm5lbCBtYXBzCj4g PiAudGV4dCB3aXRoIEdQIHdoaWxlIG52aGUgbWFwcyBhbGwgdGhlIGV4ZWN1dGFibGUgcGFnZXMs IHRoaXMgbWFrZXMKPiA+IG52aGUgY29kZSBuZWVkIHRvIGRlYWwgd2l0aCBzcGVjaWFsIGluaXRp YWxpemF0aW9uIGNvZGUgY29taW5nIGZyb20KPiA+IG90aGVyIGV4ZWN1dGFibGUgc2VjdGlvbnMg KC5pZG1hcC50ZXh0KS4KPiA+IEZvciB0aGlzIHdlIG5lZWQgdG8gYWRkIGJ0aSBpbnN0cnVjdGlv biBhdCB0aGUgYmVnaW5uaW5nIG9mCj4gPiBfX2t2bV9oYW5kbGVfc3R1Yl9odmMgYXMgaXQgY2Fu IGJlIGNhbGxlZCBieSAgX19ob3N0X2h2YyB0aHJvdWdoCj4gPiBicmFuY2ggaW5zdHJ1Y3Rpb24o YnIpIGFuZCB1bmxpa2UgU1lNX0ZVTkNfU1RBUlQsIFNZTV9DT0RFX1NUQVJUCj4gPiBkb2VzbuKA mXQgYWRkIGJ0aSBpbnN0cnVjdGlvbiBhdCB0aGUgYmVnaW5uaW5nLCBhbmQgaXQgY2Fu4oCZdCBi ZSBtb2RpZmllZAo+ID4gdG8gYWRkIGl0IGFzIGl0IGlzIHVzZWQgd2l0aCB2ZWN0b3IgdGFibGVz Lgo+ID4gQW5vdGhlciBzb2x1dGlvbiB3aGljaCBpcyBtb3JlIGludHJ1c2l2ZSBpcyB0byBjb252 ZXJ0Cj4gPiBfX2t2bV9oYW5kbGVfc3R1Yl9odmMgdG8gYSBmdW5jdGlvbiBhbmQgaW5qZWN0IOKA nGJ0aSBqY+KAnSBpbnN0ZWFkIG9mCj4gPiDigJxidGkgY+KAnSBpbiBTWU1fRlVOQ19TVEFSVAo+ ID4KPiAKPiBJIHdhcyBjaGFzaW5nIGEgYnVnIGluIGxpbnV4LW5leHQgeWVzdGVyZGF5IHdpdGgg cHJvdGVjdGVkIG5WSEUocEtWTSkgYW5kCj4gY3B1aWRsZSBlbmFibGVkLiBUaGUgc3lzdGVtIGZh aWxzIHRvIGJvb3QuIEkganVzdCBiaXNlY3RlZCB0aGUgaXNzdWUgdG8gdGhpcwo+IHBhdGNoIGFu ZCBhbHNvIHNhdyB0aGlzIHBhdGNoIGxhbmRlZCBpbiB0aGUgbGludXMgdHJlZSB5ZXN0ZXJkYXkv dG9kYXkuCgpPbmUgb2YgdGhlIGNoYWxsZW5nZXMgb2YgQlRJIGlzIHRoYXQgd2UgbmVlZCB0byBh ZGQgZXhwbGljaXQgQlRJIGluc3RydWN0aW9ucwpmb3IgYXNzZW1ibHkgY29kZS4gSSBjaGVja2Vk IHRoZSBjb2RlIHRvIG1ha2Ugc3VyZSB0aGF0IG5vdGhpbmcgd2FzIG1pc3NpbmcsCmJ1dCBtYXli ZSB0aGlzIGlzIG5vdCB0aGUgY2FzZS4KQ2FuIHlvdSBwbGVhc2Ugc2hhcmUgbW9yZSBhYm91dCB0 aGUgaXNzdWUgKGlzIEVTUiBhIEJyYW5jaCBUYXJnZXQgRXhjZXB0aW9uLApjYWxsIHN0YWNrLi4u KSBpZiBwb3NzaWJsZS4KQWxzbywgaXMgdGhpcyB3aXRoIENPTkZJR19BUk1fUFNDSV9DUFVJRExF PwoKPiBOb3Qgc3VyZSBpZiB0aGlzIGlzIHNvbWV0aGluZyB0byBkbyB3aXRoIHRoZSBmYWN0IHRo YXQgcEtWTSBza2lwcyB0bwo+IF9fa3ZtX2hhbmRsZV9zdHViX2h2YyBpbiBfX2hvc3RfaHZjLgpf X2t2bV9oYW5kbGVfc3R1Yl9odmMgaXMgY2FsbGVkIGZyb20gX19ob3N0X2h2YyB3aXRoICJiciB4 NSIKVGhhdCdzIHdoeSAiYnRpIGoiIHdhcyBhZGRlZCBhdCB0aGUgYmVnaW5uaW5nIG9mIF9fa3Zt X2hhbmRsZV9zdHViX2h2YywKc28gdGhpcyBzaG91bGQgYmUgZmluZS4KCj4gTGV0IG1lIGtub3cg aWYgeW91IHdhbnQgYmUgdG8gdHJ5IHNvbWV0aGluZy4KPiAKPiAtLSAKPiBSZWdhcmRzLAo+IFN1 ZGVlcAoKVGhhbmtzLApNb3N0YWZhCgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX18KbGludXgtYXJtLWtlcm5lbCBtYWlsaW5nIGxpc3QKbGludXgtYXJtLWtl cm5lbEBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxt YW4vbGlzdGluZm8vbGludXgtYXJtLWtlcm5lbAo=