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Mon, 22 Jun 2020 03:39:37 -0700 (PDT) Date: Mon, 22 Jun 2020 11:39:32 +0100 From: Andrew Scull To: Mark Rutland Subject: Re: [PATCH v2 5/5] KVM: arm64: Simplify PtrAuth alternative patching Message-ID: <20200622103932.GA178085@google.com> References: <20200622080643.171651-1-maz@kernel.org> <20200622080643.171651-6-maz@kernel.org> <20200622091508.GB88608@C02TD0UTHF1T.local> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200622091508.GB88608@C02TD0UTHF1T.local> Cc: kvm@vger.kernel.org, Marc Zyngier , Dave Martin , linux-arm-kernel@lists.infradead.org, kernel-team@android.com, kvmarm@lists.cs.columbia.edu X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu T24gTW9uLCBKdW4gMjIsIDIwMjAgYXQgMTA6MTU6MDhBTSArMDEwMCwgTWFyayBSdXRsYW5kIHdy b3RlOgo+IE9uIE1vbiwgSnVuIDIyLCAyMDIwIGF0IDA5OjA2OjQzQU0gKzAxMDAsIE1hcmMgWnlu Z2llciB3cm90ZToKCgo+ID4gLS0tIGEvYXJjaC9hcm02NC9pbmNsdWRlL2FzbS9rdm1fcHRyYXV0 aC5oCj4gPiArKysgYi9hcmNoL2FybTY0L2luY2x1ZGUvYXNtL2t2bV9wdHJhdXRoLmgKPiA+IEBA IC02MSw0NCArNjEsMzYgQEAKPiA+ICAKPiA+ICAvKgo+ID4gICAqIEJvdGggcHRyYXV0aF9zd2l0 Y2hfdG9fZ3Vlc3QgYW5kIHB0cmF1dGhfc3dpdGNoX3RvX2hvc3QgbWFjcm9zIHdpbGwKPiA+IC0g KiBjaGVjayBmb3IgdGhlIHByZXNlbmNlIG9mIG9uZSBvZiB0aGUgY3B1ZmVhdHVyZSBmbGFnCj4g PiAtICogQVJNNjRfSEFTX0FERFJFU1NfQVVUSF9BUkNIIG9yIEFSTTY0X0hBU19BRERSRVNTX0FV VEhfSU1QX0RFRiBhbmQKPiA+ICsgKiBjaGVjayBmb3IgdGhlIHByZXNlbmNlIEFSTTY0X0hBU19B RERSRVNTX0FVVEgsIHdoaWNoIGlzIGRlZmluZWQgYXMKPiA+ICsgKiAoQVJNNjRfSEFTX0FERFJF U1NfQVVUSF9BUkNIIHx8IEFSTTY0X0hBU19BRERSRVNTX0FVVEhfSU1QX0RFRikgYW5kCj4gPiAg ICogdGhlbiBwcm9jZWVkIGFoZWFkIHdpdGggdGhlIHNhdmUvcmVzdG9yZSBvZiBQb2ludGVyIEF1 dGhlbnRpY2F0aW9uCj4gPiAtICoga2V5IHJlZ2lzdGVycy4KPiA+ICsgKiBrZXkgcmVnaXN0ZXJz IGlmIGVuYWJsZWQgZm9yIHRoZSBndWVzdC4KPiA+ICAgKi8KPiA+ICAubWFjcm8gcHRyYXV0aF9z d2l0Y2hfdG9fZ3Vlc3QgZ19jdHh0LCByZWcxLCByZWcyLCByZWczCj4gPiAtYWx0ZXJuYXRpdmVf aWYgQVJNNjRfSEFTX0FERFJFU1NfQVVUSF9BUkNICj4gPiArYWx0ZXJuYXRpdmVfaWZfbm90IEFS TTY0X0hBU19BRERSRVNTX0FVVEgKPiA+ICAJYgkxMDAwZgo+ID4gIGFsdGVybmF0aXZlX2Vsc2Vf bm9wX2VuZGlmCj4gPiAtYWx0ZXJuYXRpdmVfaWZfbm90IEFSTTY0X0hBU19BRERSRVNTX0FVVEhf SU1QX0RFRgo+ID4gLQliCTEwMDFmCj4gPiAtYWx0ZXJuYXRpdmVfZWxzZV9ub3BfZW5kaWYKPiA+ IC0xMDAwOgo+ID4gIAltcnMJXHJlZzEsIGhjcl9lbDIKPiA+ICAJYW5kCVxyZWcxLCBccmVnMSwg IyhIQ1JfQVBJIHwgSENSX0FQSykKPiA+IC0JY2J6CVxyZWcxLCAxMDAxZgo+ID4gKwljYnoJXHJl ZzEsIDEwMDBmCj4gPiAgCWFkZAlccmVnMSwgXGdfY3R4dCwgI0NQVV9BUElBS0VZTE9fRUwxCj4g PiAgCXB0cmF1dGhfcmVzdG9yZV9zdGF0ZQlccmVnMSwgXHJlZzIsIFxyZWczCj4gPiAtMTAwMToK PiA+ICsxMDAwOgo+ID4gIC5lbmRtCj4gCj4gU2luY2UgdGhlc2UgYXJlIGluIG1hY3Jvcywgd2Ug Y291bGQgdXNlIFxAIHRvIGdlbmVyYXRlIGEgbWFjcm8tc3BlY2lmaWMKPiBsYXZlbCByYXRoZXIg dGhhbiBhIG1hZ2ljIG51bWJlciwgd2hpY2ggd291bGQgYmUgbGVzcyBsaWtlbHkgdG8gY29uZmxp Y3QKPiB3aXRoIHRoZSBzdXJyb3VuZGluZyBlbnZpcm9ubWVudCBhbmQgd291bGQgYmUgbW9yZSBk ZXNjcmlwdGl2ZS4gV2UgZG8KPiB0aGF0IGluIGEgZmV3IHBsYWNlcyBhbHJlYWR5LCBhbmQgaGVy ZSBpdCBjb3VsZCBsb29rIHNvbWV0aGluZyBsaWtlOgo+IAo+IHwgYWx0ZXJuYXRpdmVfaWZfbm90 IEFSTTY0X0hBU19BRERSRVNTX0FVVEgKPiB8IAliCS5MX19za2lwX3BhdXRoX3N3aXRjaFxACj4g fCBhbHRlcm5hdGl2ZV9lbHNlX25vcF9lbmRpZgo+IHwgCQo+IHwgCS4uLgo+IHwgCj4gfCAuTF9f c2tpcF9wYXV0aF9zd2l0Y2hcQDoKPiAKPiBQZXIgdGhlIGdhcyBkb2N1bWVudGF0aW9uCj4gCj4g fCBcQAo+IHwKPiB8ICAgIGFzIG1haW50YWlucyBhIGNvdW50ZXIgb2YgaG93IG1hbnkgbWFjcm9z IGl0IGhhcyBleGVjdXRlZCBpbiB0aGlzCj4gfCAgICBwc2V1ZG8tdmFyaWFibGU7IHlvdSBjYW4g Y29weSB0aGF0IG51bWJlciB0byB5b3VyIG91dHB1dCB3aXRoIOKAmFxA4oCZLAo+IHwgICAgYnV0 IG9ubHkgd2l0aGluIGEgbWFjcm8gZGVmaW5pdGlvbi4KCklzIHRoaXMgcmVsaWJhbGUgZm9yIHRo aXMgc29ydCBvZiBhcHBsaWNhdGlvbj8gVGhlIGRlc2NyaXB0aW9uIGp1c3QKc291bmRzIGxpa2Ug YSBjb3VudGVyIG9mIG1hY3JvcyByYXRoZXIgdGhhbiBzcGVjaWZpY2FsbHkgYSB1bmlxdWUgbGFi ZWwKZ2VuZXJhdG9yLiBJdCBtYXkgd29yayBtb3N0IG9mIHRoZSB0aW1lIGJ1dCBhbHNvIHNlZW1z IHRoYXQgaXQgaGFzIHRoZQpwb3RlbnRpYWwgdG8gYmUgbW9yZSBmcmFnaWxlIGdpdmVuIHRoYXQg aXQgd291bGQgY2hhbmdlIGJhc2VkIG9uIHRoZQpyZXN0IG9mIHRoZSBjb2RlIGluIHRoZSBmaWxl IHRvIHBvdGVudGlhbGx5IGNvbmZsaWN0IHdpdGggc29tZXRoaW5nIGl0CmRpZG4ndCBwcmV2aW91 c2x5IGNvbmZsaWN0IHdpdGguIApfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fXwprdm1hcm0gbWFpbGluZyBsaXN0Cmt2bWFybUBsaXN0cy5jcy5jb2x1bWJpYS5l ZHUKaHR0cHM6Ly9saXN0cy5jcy5jb2x1bWJpYS5lZHUvbWFpbG1hbi9saXN0aW5mby9rdm1hcm0K