From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex =?utf-8?Q?Benn=C3=A9e?= Subject: Re: [RFC PATCH 13/16] KVM: Allow 2048-bit register access via KVM_{GET, SET}_ONE_REG Date: Wed, 25 Jul 2018 16:58:30 +0100 Message-ID: <874lgntihl.fsf@linaro.org> References: <1529593060-542-1-git-send-email-Dave.Martin@arm.com> <1529593060-542-14-git-send-email-Dave.Martin@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id EABF64A0F6 for ; Wed, 25 Jul 2018 11:58:33 -0400 (EDT) Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id BTlxUXbO12ij for ; Wed, 25 Jul 2018 11:58:32 -0400 (EDT) Received: from mail-wm0-f65.google.com (mail-wm0-f65.google.com [74.125.82.65]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id C2C1540A50 for ; Wed, 25 Jul 2018 11:58:32 -0400 (EDT) Received: by mail-wm0-f65.google.com with SMTP id o11-v6so6562783wmh.2 for ; Wed, 25 Jul 2018 08:58:32 -0700 (PDT) In-reply-to: <1529593060-542-14-git-send-email-Dave.Martin@arm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu To: Dave Martin Cc: Okamoto Takayuki , Christoffer Dall , Ard Biesheuvel , Marc Zyngier , Catalin Marinas , Will Deacon , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org List-Id: kvmarm@lists.cs.columbia.edu CkRhdmUgTWFydGluIDxEYXZlLk1hcnRpbkBhcm0uY29tPiB3cml0ZXM6Cgo+IFRoZSBBcm0gU1ZF IGFyY2hpdGVjdHVyZSBkZWZpbmVzIHJlZ2lzdGVycyB0aGF0IGFyZSB1cCB0byAyMDQ4IGJpdHMK PiBpbiBzaXplICh3aXRoIHNvbWUgcG9zc2liaWxpdHkgb2YgZnVydGhlciBmdXR1cmUgZXhwYW5z aW9uKS4KPgo+IEluIG9yZGVyIHRvIGF2b2lkIHRoZSBuZWVkIGZvciBhbiBleGNlc3NpdmVseSBs YXJnZSBudW1iZXIgb2YKPiBpb2N0bHMgd2hlbiBzYXZpbmcgYW5kIHJlc3RvcmluZyBhIHZjcHUn cyByZWdpc3RlcnMsIHRoaXMgcGF0Y2gKPiBhZGRzIGEgI2RlZmluZSB0byBtYWtlIHN1cHBvcnQg Zm9yIGluZGl2aWR1YWwgMjA0OC1iaXQgcmVnaXN0ZXJzCj4gdGhyb3VnaCB0aGUgS1ZNX3tHRVQs U0VUfV9PTkVfUkVHIGlvY3RsIGludGVyZmFjZSBvZmZpY2lhbC4gIFRoaXMKPiB3aWxsIGFsbG93 IGVhY2ggU1ZFIHJlZ2lzdGVyIHRvIGJlIGFjY2Vzc2VkIGluIGEgc2luZ2xlIGNhbGwuCj4KPiBU aGVyZSBhcmUgc3VmZmljaWVudCBzcGFyZSBiaXRzIGluIHRoZSByZWdpc3RlciBpZCBzaXplIGZp ZWxkIGZvcgo+IHRoaXMgY2hhbmdlLCBzbyB0aGVyZSBpcyBubyBBQkkgaW1wYWN0IHByb3ZpZGlu ZyB0aGF0Cj4gS1ZNX0dFVF9SRUdfTElTVCBkb2VzIG5vdCBlbnVtZXJhdGUgYW55IDIwNDgtYml0 IHJlZ2lzdGVyIHVubGVzcwo+IHVzZXJzcGFjZSBleHBsaWNpdGx5IG9wdHMgaW4gdG8gdGhlIHJl bGV2YW50IGFyY2hpdGVjdHVyZS1zcGVjaWZpYwo+IGZlYXR1cmVzLgoKRG9lcyBpdD8gSXQncyBu b3QgaW4gdGhpcyBwYXRjaCBhbmQgbG9va2luZyBhdCB0aGUgZmluYWwgdHJlZToKCiAgdW5zaWdu ZWQgbG9uZyBrdm1fYXJtX251bV9yZWdzKHN0cnVjdCBrdm1fdmNwdSAqdmNwdSkKICB7CiAgICAg ICAgICB1bnNpZ25lZCBsb25nIHJlcyA9IDA7CgogICAgICAgICAgcmVzICs9IG51bV9jb3JlX3Jl Z3MoKTsKICAgICAgICAgIHJlcyArPSBudW1fc3ZlX3JlZ3ModmNwdSk7CiAgICAgICAgICByZXMg Kz0ga3ZtX2FybV9udW1fc3lzX3JlZ19kZXNjcyh2Y3B1KTsKICAgICAgICAgIHJlcyArPSBrdm1f YXJtX2dldF9md19udW1fcmVncyh2Y3B1KTsKICAgICAgICAgIHJlcyArPSBOVU1fVElNRVJfUkVH UzsKCiAgICAgICAgICByZXR1cm4gcmVzOwogIH0KCgp3aGljaCBsZWFkcyB0bzoKCiAgc3RhdGlj IGludCBlbnVtZXJhdGVfc3ZlX3JlZ3MoY29uc3Qgc3RydWN0IGt2bV92Y3B1ICp2Y3B1LCB1NjQg X191c2VyICoqdWluZCkKICB7CiAgICAgICAgICB1bnNpZ25lZCBpbnQgbiwgaTsKICAgICAgICAg IGludCBlcnIgPSAwOwogICAgICAgICAgaW50IHRvdGFsID0gMDsKICAgICAgICAgIHVuc2lnbmVk IGludCBzbGljZXM7CgogICAgICAgICAgaWYgKCF2Y3B1X2hhc19zdmUoJnZjcHUtPmFyY2gpKQog ICAgICAgICAgICAgICAgICByZXR1cm4gMDsKCldoaWNoIGVudW1lcmF0ZXMgdGhlIFNWRSByZWdz IGlmIHZjcHVfaGFzX3N2ZSgpIHdoaWNoIEFGQUlDVCBpcyB0cnVlIGlmCnRoZSBob3N0IHN1cHBv cnRzIGl0LCBub3QgaWYgdGhlIHVzZXIgaGFzIHJlcXVlc3RlZCBpdC4KCkknbGwgaGF2ZSB0byBj aGVjayB3aGF0IGJ1dCBnaXZlbiB0aGUgaW5kaXJlY3Rpb24gb2Yga3ZtX29uZV9yZWcgSQp3b25k ZXIgaWYgZXhpc3RpbmcgYmluYXJpZXMgbWlnaHQgZW5kIHVwIHNwYW1taW5nIGEgYmFkbHkgc2l6 ZWQgYXJyYXkKd2hlbiBydW4gb24gYSBuZXcgU1ZFIHN1cHBvcnRpbmcga2VybmVsPwoKPgo+IFNp Z25lZC1vZmYtYnk6IERhdmUgTWFydGluIDxEYXZlLk1hcnRpbkBhcm0uY29tPgo+IC0tLQo+ICBp bmNsdWRlL3VhcGkvbGludXgva3ZtLmggfCAxICsKPiAgMSBmaWxlIGNoYW5nZWQsIDEgaW5zZXJ0 aW9uKCspCj4KPiBkaWZmIC0tZ2l0IGEvaW5jbHVkZS91YXBpL2xpbnV4L2t2bS5oIGIvaW5jbHVk ZS91YXBpL2xpbnV4L2t2bS5oCj4gaW5kZXggYjYyNzBhMy4uMzQ1YmU4OCAxMDA2NDQKPiAtLS0g YS9pbmNsdWRlL3VhcGkvbGludXgva3ZtLmgKPiArKysgYi9pbmNsdWRlL3VhcGkvbGludXgva3Zt LmgKPiBAQCAtMTEwNiw2ICsxMTA2LDcgQEAgc3RydWN0IGt2bV9kaXJ0eV90bGIgewo+ICAjZGVm aW5lIEtWTV9SRUdfU0laRV9VMjU2CTB4MDA1MDAwMDAwMDAwMDAwMFVMTAo+ICAjZGVmaW5lIEtW TV9SRUdfU0laRV9VNTEyCTB4MDA2MDAwMDAwMDAwMDAwMFVMTAo+ICAjZGVmaW5lIEtWTV9SRUdf U0laRV9VMTAyNAkweDAwNzAwMDAwMDAwMDAwMDBVTEwKPiArI2RlZmluZSBLVk1fUkVHX1NJWkVf VTIwNDgJMHgwMDgwMDAwMDAwMDAwMDAwVUxMCj4KPiAgc3RydWN0IGt2bV9yZWdfbGlzdCB7Cj4g IAlfX3U2NCBuOyAvKiBudW1iZXIgb2YgcmVncyAqLwoKCi0tCkFsZXggQmVubsOpZQpfX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwprdm1hcm0gbWFpbGluZyBs aXN0Cmt2bWFybUBsaXN0cy5jcy5jb2x1bWJpYS5lZHUKaHR0cHM6Ly9saXN0cy5jcy5jb2x1bWJp YS5lZHUvbWFpbG1hbi9saXN0aW5mby9rdm1hcm0K