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Mon, 07 Dec 2020 15:56:02 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kmIrn-0004Rp-F1 for linux-arm-kernel@lists.infradead.org; Mon, 07 Dec 2020 15:56:00 +0000 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6113423741; Mon, 7 Dec 2020 15:55:58 +0000 (UTC) Received: from disco-boy.misterjones.org ([51.254.78.96] helo=www.loen.fr) by disco-boy.misterjones.org with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94) (envelope-from ) id 1kmIrk-00Gnm0-3l; Mon, 07 Dec 2020 15:55:56 +0000 MIME-Version: 1.0 Date: Mon, 07 Dec 2020 15:55:56 +0000 From: Marc Zyngier To: Steven Price Subject: Re: [PATCH v6 1/2] arm64: kvm: Save/restore MTE registers In-Reply-To: <03566358-21b0-11d9-c4f6-d07d137a1009@arm.com> References: <20201127152113.13099-1-steven.price@arm.com> <20201127152113.13099-2-steven.price@arm.com> <946b1e7b06c4d286a78cf61408e0fc8d@kernel.org> <03566358-21b0-11d9-c4f6-d07d137a1009@arm.com> User-Agent: Roundcube Webmail/1.4.9 Message-ID: <07e40bbcf734e8c63630168406262bb2@kernel.org> X-Sender: maz@kernel.org X-SA-Exim-Connect-IP: 51.254.78.96 X-SA-Exim-Rcpt-To: steven.price@arm.com, catalin.marinas@arm.com, will@kernel.org, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Dave.Martin@arm.com, mark.rutland@arm.com, tglx@linutronix.de, qemu-devel@nongnu.org, quintela@redhat.com, dgilbert@redhat.com, richard.henderson@linaro.org, peter.maydell@linaro.org, Haibo.Xu@arm.com, drjones@redhat.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201207_105559_692689_5E7EBABB X-CRM114-Status: GOOD ( 22.02 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Peter Maydell , "Dr. David Alan Gilbert" , Andrew Jones , Haibo Xu , Suzuki K Poulose , qemu-devel@nongnu.org, Catalin Marinas , Juan Quintela , Richard Henderson , linux-kernel@vger.kernel.org, Dave Martin , James Morse , linux-arm-kernel@lists.infradead.org, Thomas Gleixner , Will Deacon , kvmarm@lists.cs.columbia.edu, Julien Thierry Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gMjAyMC0xMi0wNyAxNDo0OCwgU3RldmVuIFByaWNlIHdyb3RlOgo+IE9uIDAzLzEyLzIwMjAg MTc6MDcsIE1hcmMgWnluZ2llciB3cm90ZToKPj4gCj4+PiBkaWZmIC0tZ2l0IGEvYXJjaC9hcm02 NC9pbmNsdWRlL2FzbS9zeXNyZWcuaCAKPj4+IGIvYXJjaC9hcm02NC9pbmNsdWRlL2FzbS9zeXNy ZWcuaAo+Pj4gaW5kZXggZTJlZjRjMmVkZjA2Li5iNjY2OGZmYTA0ZDkgMTAwNjQ0Cj4+PiAtLS0g YS9hcmNoL2FybTY0L2luY2x1ZGUvYXNtL3N5c3JlZy5oCj4+PiArKysgYi9hcmNoL2FybTY0L2lu Y2x1ZGUvYXNtL3N5c3JlZy5oCj4+PiBAQCAtNTY5LDcgKzU2OSw4IEBACj4+PiDCoCNkZWZpbmUg U0NUTFJfRUx4X03CoMKgwqAgKEJJVCgwKSkKPj4+IAo+Pj4gwqAjZGVmaW5lIFNDVExSX0VMeF9G TEFHU8KgwqDCoCAoU0NUTFJfRUx4X03CoCB8IFNDVExSX0VMeF9BIHwgU0NUTFJfRUx4X0MgCj4+ PiB8IFwKPj4+IC3CoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgU0NUTFJfRUx4X1NBIHwgU0NUTFJf RUx4X0kgfCBTQ1RMUl9FTHhfSUVTQikKPj4+ICvCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgU0NU TFJfRUx4X1NBIHwgU0NUTFJfRUx4X0kgfCBTQ1RMUl9FTHhfSUVTQiB8IFwKPj4+ICvCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqAgU0NUTFJfRUx4X0lURlNCKQo+Pj4gCj4+PiDCoC8qIFNDVExSX0VM MiBzcGVjaWZpYyBmbGFncy4gKi8KPj4+IMKgI2RlZmluZSBTQ1RMUl9FTDJfUkVTMcKgwqDCoCAo KEJJVCg0KSnCoCB8IChCSVQoNSkpwqAgfCAoQklUKDExKSkgfCAKPj4+IChCSVQoMTYpKSB8IFwK Pj4+IGRpZmYgLS1naXQgYS9hcmNoL2FybTY0L2t2bS9oeXAvaW5jbHVkZS9oeXAvc3lzcmVnLXNy LmgKPj4+IGIvYXJjaC9hcm02NC9rdm0vaHlwL2luY2x1ZGUvaHlwL3N5c3JlZy1zci5oCj4+PiBp bmRleCBjY2U0M2JmZTE1OGYuLjQ1MjU1YmE2MDE1MiAxMDA2NDQKPj4+IC0tLSBhL2FyY2gvYXJt NjQva3ZtL2h5cC9pbmNsdWRlL2h5cC9zeXNyZWctc3IuaAo+Pj4gKysrIGIvYXJjaC9hcm02NC9r dm0vaHlwL2luY2x1ZGUvaHlwL3N5c3JlZy1zci5oCj4+PiBAQCAtMTgsNiArMTgsMTEgQEAKPj4+ IMKgc3RhdGljIGlubGluZSB2b2lkIF9fc3lzcmVnX3NhdmVfY29tbW9uX3N0YXRlKHN0cnVjdCBr dm1fY3B1X2NvbnRleHQgCj4+PiAqY3R4dCkKPj4+IMKgewo+Pj4gwqDCoMKgwqAgY3R4dF9zeXNf cmVnKGN0eHQsIE1EU0NSX0VMMSnCoMKgwqAgPSByZWFkX3N5c3JlZyhtZHNjcl9lbDEpOwo+Pj4g K8KgwqDCoCBpZiAoc3lzdGVtX3N1cHBvcnRzX210ZSgpKSB7Cj4+IAo+PiBQbGVhc2UgbW92ZSB0 aGUgcGVyLVZNIHByZWRpY2F0ZSB0byB0aGlzIHBhdGNoIHNvIHRoYXQgaXQgY2FuIGJlIHVzZWQK Pj4gbm90IHRvIHNhdmUvcmVzdG9yZSB0aGUgTVRFIHJlZ2lzdGVycyBpZiB3ZSBkb24ndCBuZWVk IHRvLgo+IAo+IFRoZXJlIGlzbid0IGEgdmFsaWQgc3RydWN0IGt2bV92Y3B1IG9yIHN0cnVjdCBr dm0gaGVyZS4gSSBrbm93IHRoZXJlJ3MKPiBjdHgtPl9faHlwX3J1bm5pbmdfdmNwdSBidXQgQUZB SUNUIHRoYXQgaXMgb25seSB2YWxpZCB3aXRoIHRoZSBob3N0Cj4gY29udGV4dC4KCldlIGhhdmUg cGVyLUNQVSB2YXJpYWJsZXMgZm9yIHRoZSBob3N0IGNvbnRleHQuIElmIApjdHgtPl9faHlwX3J1 bm5pbmdfdmNwdQppcyBub24gTlVMTCwgeW91IGtub3cgeW91J3JlIG9uIHRoZSBob3N0LgoKCj4g Cj4+IAo+Pj4gK8KgwqDCoMKgwqDCoMKgIGN0eHRfc3lzX3JlZyhjdHh0LCBSR1NSX0VMMSnCoMKg wqAgPSAKPj4+IHJlYWRfc3lzcmVnX3MoU1lTX1JHU1JfRUwxKTsKPj4+ICvCoMKgwqDCoMKgwqDC oCBjdHh0X3N5c19yZWcoY3R4dCwgR0NSX0VMMSnCoMKgwqAgPSByZWFkX3N5c3JlZ19zKFNZU19H Q1JfRUwxKTsKPj4+ICvCoMKgwqDCoMKgwqDCoCBjdHh0X3N5c19yZWcoY3R4dCwgVEZTUkUwX0VM MSnCoMKgwqAgPSAKPj4+IHJlYWRfc3lzcmVnX3MoU1lTX1RGU1JFMF9FTDEpOwo+Pj4gK8KgwqDC oCB9Cj4+IAo+PiBPdmVyYWxsLCBJIHN0aWxsIGRvbid0IHVuZGVyc3RhbmQgaG93IHRoaXMgaXMg Z29pbmcgdG8gd29yayBvbmNlCj4+IHdlIGhhdmUgTVRFIGluIHRoZSBrZXJuZWwuIFlvdSBtZW50 aW9uZWQgaGF2aW5nIHRoZSBhYmlsaXR5IHRvCj4+IGNyZWF0ZSB0dXJuIG9mZiB0aGUgdGFnIGNo ZWNrcyBhdCB0aW1lcywgYnV0IEkgZG9uJ3Qgc2VlIHRoYXQKPj4gaW4gdGhpcyBwYXRjaCAoYW5k IEknbSBub3Qgc3VyZSB3ZSB3YW50IHRoYXQgZWl0aGVyKS4KPiAKPiBHaXZlbiB0aGF0IHRoaXMg aXMgbm93IGhpZ2hseSB1bmxpa2VseSB0byBiZSBtZXJnZWQgZm9yIHY1LjExLCBJJ2xsCj4gcmVi YXNlIG9udG8gb2YgdGhlIEtBU0FOIE1URSBzZXJpZXMgYW5kIGRvdWJsZSBjaGVjayBleGFjdGx5 IHdoYXQKPiBoYXBwZW5zLiBNeSB0aG91Z2h0IHdhcyB0aGF0IGl0IHNob3VsZCBiZSBhcyBzaW1w bGUgYXMgc2V0dGluZyBUQ08sCj4gYnV0IHlvdXIgcHJldmlvdXMgY29tbWVudCBhYm91dCBtb3Zp bmcgdGhlIHNhdmUvcmVzdG9yZSBpbnRvIGFzc2VtYmxlcgo+IG1pZ2h0IGJlIHdpc2UgaW4gY2Fz ZSB0aGUgY29tcGlsZXIgc3RhcnRzIHBsYXlpbmcgd2l0aCBUQ08gaXRzZWxmLgoKSW5kZWVkLgoK VGhhbmtzLAoKICAgICAgICAgTS4KLS0gCkphenogaXMgbm90IGRlYWQuIEl0IGp1c3Qgc21lbGxz IGZ1bm55Li4uCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f XwpsaW51eC1hcm0ta2VybmVsIG1haWxpbmcgbGlzdApsaW51eC1hcm0ta2VybmVsQGxpc3RzLmlu ZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9s aW51eC1hcm0ta2VybmVsCg==