From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: [PATCH v5 2/7] xen/arm: cpufeature: Provide an helper to check if a capability is supported Date: Fri, 22 Jul 2016 10:18:02 -0400 Message-ID: <20160722141802.GC21054@char.us.oracle.com> References: <1469028360-20907-1-git-send-email-julien.grall@arm.com> <1469028360-20907-3-git-send-email-julien.grall@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline In-Reply-To: <1469028360-20907-3-git-send-email-julien.grall@arm.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Julien Grall Cc: sstabellini@kernel.org, xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org T24gV2VkLCBKdWwgMjAsIDIwMTYgYXQgMDQ6MjU6NTVQTSArMDEwMCwgSnVsaWVuIEdyYWxsIHdy b3RlOgo+IFRoZSBDUFUgY2FwYWJpbGl0aWVzIHdpbGwgYmUgc2V0IGRlcGVuZGluZyBvbiB0aGUg dmFsdWUgZm91bmQgaW4gdGhlIENQVQo+IHJlZ2lzdGVycy4gVGhpcyBwYXRjaCBwcm92aWRlcyBh IGdlbmVyaWMgdG8gZ28gdGhyb3VnaCBhIHNldCBvZiBjYXBhYmlsaXRpZXMKPiBhbmQgZmluZCB3 aGljaCBvbmUgc2hvdWxkIGJlIGVuYWJsZWQuCj4gCj4gVGhlIHBhcmFtZXRlciAiaW5mbyIgaXMg dXNlZCB0byBkaXNwbGF5IHRoZSBraW5kIG9mIGNhcGFiaWxpdHkgdXBkYXRlZCAoZS5nCj4gd29y a2Fyb3VuZCwgZmVhdHVyZS4uLikuCj4gCj4gU2lnbmVkLW9mZi1ieTogSnVsaWVuIEdyYWxsIDxq dWxpZW4uZ3JhbGxAYXJtLmNvbT4KPiBBY2tlZC1ieTogU3RlZmFubyBTdGFiZWxsaW5pIDxzc3Rh YmVsbGluaUBrZXJuZWwub3JnPgoKUmV2aWV3ZWQtYnk6IEtvbnJhZCBSemVzenV0ZWsgV2lsayA8 a29ucmFkLndpbGtAb3JhY2xlLmNvbT4gd2l0aCBqdXN0IG9uZSBtaW5vcgpzdWdnZXN0aW9uOgoK PiAKPiAtLS0KPiAgICAgQ2hhbmdlcyBpbiB2NDoKPiAgICAgICAgIC0gQWRkIFN0ZWZhbm8ncyBh Y2tlZC1ieQo+IAo+ICAgICBDaGFuZ2VzIGluIHYzOgo+ICAgICAgICAgIC0gUGF0Y2ggYWRkZWQu IFRoZSBjb2RlIHdhcyBwcmV2aW91c2x5IHBhcnQgb2YgIkRldGVjdAo+ICAgICAgICAgIHNpbGlj b24uLi4iLgo+IC0tLQo+ICB4ZW4vYXJjaC9hcm0vY3B1ZmVhdHVyZS5jICAgICAgICB8IDE2ICsr KysrKysrKysrKysrKysKPiAgeGVuL2luY2x1ZGUvYXNtLWFybS9jcHVmZWF0dXJlLmggfCAgOSAr KysrKysrKysKPiAgMiBmaWxlcyBjaGFuZ2VkLCAyNSBpbnNlcnRpb25zKCspCj4gCj4gZGlmZiAt LWdpdCBhL3hlbi9hcmNoL2FybS9jcHVmZWF0dXJlLmMgYi94ZW4vYXJjaC9hcm0vY3B1ZmVhdHVy ZS5jCj4gaW5kZXggN2ExYjU2Yi4uMDg4NjI1YiAxMDA2NDQKPiAtLS0gYS94ZW4vYXJjaC9hcm0v Y3B1ZmVhdHVyZS5jCj4gKysrIGIveGVuL2FyY2gvYXJtL2NwdWZlYXR1cmUuYwo+IEBAIC0yNCw2 ICsyNCwyMiBAQAo+ICAKPiAgREVDTEFSRV9CSVRNQVAoY3B1X2h3Y2FwcywgQVJNX05DQVBTKTsK PiAgCj4gK3ZvaWQgdXBkYXRlX2NwdV9jYXBhYmlsaXRpZXMoY29uc3Qgc3RydWN0IGFybV9jcHVf Y2FwYWJpbGl0aWVzICpjYXBzLAo+ICsgICAgICAgICAgICAgICAgICAgICAgICAgICAgIGNvbnN0 IGNoYXIgKmluZm8pCj4gK3sKPiArICAgIGludCBpOwo+ICsKPiArICAgIGZvciAoIGkgPSAwOyBj YXBzW2ldLm1hdGNoZXM7IGkrKyApCj4gKyAgICB7Cj4gKyAgICAgICAgaWYgKCAhY2Fwc1tpXS5t YXRjaGVzKCZjYXBzW2ldKSApCgpTbyB3aGF0IGlmIHRoZSAnc3RydWN0IGFybV9jcHVfY2FwYWJp bGl0dWVzJyBoYXMgJy0+bWF0Y2hlcycgc2V0IHRvCk5VTEw/CgpQZXJoYXBzOgoKCWlmICggIWNh cHNbaV0ubWF0Y2hlcyB8fCAhY2Fwc1tpXS4uLiA/Cj4gKyAgICAgICAgICAgIGNvbnRpbnVlOwo+ ICsKPiArICAgICAgICBpZiAoICFjcHVzX2hhdmVfY2FwKGNhcHNbaV0uY2FwYWJpbGl0eSkgJiYg Y2Fwc1tpXS5kZXNjICkKPiArICAgICAgICAgICAgcHJpbnRrKFhFTkxPR19JTkZPICIlczogJXNc biIsIGluZm8sIGNhcHNbaV0uZGVzYyk7Cj4gKyAgICAgICAgY3B1c19zZXRfY2FwKGNhcHNbaV0u Y2FwYWJpbGl0eSk7Cj4gKyAgICB9Cj4gK30KPiArCj4gIC8qCj4gICAqIExvY2FsIHZhcmlhYmxl czoKPiAgICogbW9kZTogQwo+IGRpZmYgLS1naXQgYS94ZW4vaW5jbHVkZS9hc20tYXJtL2NwdWZl YXR1cmUuaCBiL3hlbi9pbmNsdWRlL2FzbS1hcm0vY3B1ZmVhdHVyZS5oCj4gaW5kZXggMmJlYmFk MS4uYmUyNDE0YyAxMDA2NDQKPiAtLS0gYS94ZW4vaW5jbHVkZS9hc20tYXJtL2NwdWZlYXR1cmUu aAo+ICsrKyBiL3hlbi9pbmNsdWRlL2FzbS1hcm0vY3B1ZmVhdHVyZS5oCj4gQEAgLTYyLDYgKzYy LDE1IEBAIHN0YXRpYyBpbmxpbmUgdm9pZCBjcHVzX3NldF9jYXAodW5zaWduZWQgaW50IG51bSkK PiAgICAgICAgICBfX3NldF9iaXQobnVtLCBjcHVfaHdjYXBzKTsKPiAgfQo+ICAKPiArc3RydWN0 IGFybV9jcHVfY2FwYWJpbGl0aWVzIHsKPiArICAgIGNvbnN0IGNoYXIgKmRlc2M7Cj4gKyAgICB1 MTYgY2FwYWJpbGl0eTsKPiArICAgIGJvb2xfdCAoKm1hdGNoZXMpKGNvbnN0IHN0cnVjdCBhcm1f Y3B1X2NhcGFiaWxpdGllcyAqKTsKPiArfTsKPiArCj4gK3ZvaWQgdXBkYXRlX2NwdV9jYXBhYmls aXRpZXMoY29uc3Qgc3RydWN0IGFybV9jcHVfY2FwYWJpbGl0aWVzICpjYXBzLAo+ICsgICAgICAg ICAgICAgICAgICAgICAgICAgICAgIGNvbnN0IGNoYXIgKmluZm8pOwo+ICsKPiAgI2VuZGlmIC8q IF9fQVNTRU1CTFlfXyAqLwo+ICAKPiAgI2VuZGlmCj4gLS0gCj4gMS45LjEKPiAKPiAKPiBfX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwo+IFhlbi1kZXZlbCBt YWlsaW5nIGxpc3QKPiBYZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwo+IGh0dHBzOi8vbGlzdHMueGVu Lm9yZy94ZW4tZGV2ZWwKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVsQGxpc3RzLnhlbi5vcmcKaHR0 cHM6Ly9saXN0cy54ZW4ub3JnL3hlbi1kZXZlbAo=