From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefano Stabellini Subject: Re: [PATCH v3 10/16] xen/arm: cpufeature: Provide an helper to check if a capability is supported Date: Wed, 22 Jun 2016 11:14:55 +0100 (BST) Message-ID: References: <1465315583-1278-1-git-send-email-julien.grall@arm.com> <1465315583-1278-11-git-send-email-julien.grall@arm.com> <576A63D6.6070306@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <576A63D6.6070306@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: andre.przywara@arm.com, Stefano Stabellini , steve.capper@arm.com, wei.chen@arm.com, xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org T24gV2VkLCAyMiBKdW4gMjAxNiwgSnVsaWVuIEdyYWxsIHdyb3RlOgo+IEhpIFN0ZWZhbm8sCj4g Cj4gT24gMjIvMDYvMTYgMTA6NTksIFN0ZWZhbm8gU3RhYmVsbGluaSB3cm90ZToKPiA+IE9uIFR1 ZSwgNyBKdW4gMjAxNiwgSnVsaWVuIEdyYWxsIHdyb3RlOgo+ID4gPiBUaGUgQ1BVIGNhcGFiaWxp dGllcyB3aWxsIGJlIHNldCBkZXBlbmRpbmcgb24gdGhlIHZhbHVlIGZvdW5kIGluIHRoZSBDUFUK PiA+ID4gcmVnaXN0ZXJzLiBUaGlzIHBhdGNoIHByb3ZpZGVzIGEgZ2VuZXJpYyB0byBnbyB0aHJv dWdoIGEgc2V0IG9mCj4gPiA+IGNhcGFiaWxpdGllcwo+ID4gPiBhbmQgZmluZCB3aGljaCBvbmUg c2hvdWxkIGJlIGVuYWJsZWQuCj4gPiA+IAo+ID4gPiBUaGUgcGFyYW1ldGVyICJpbmZvIiBpcyB1 c2VkIHRvIGRpc3BsYXkgdGhlIGtpbmQgb2YgY2FwYWJpbGl0eSB1cGRhdGVkCj4gPiA+IChlLmcK PiA+ID4gd29ya2Fyb3VuZCwgZmVhdHVyZS4uLikuCj4gPiA+IAo+ID4gPiBTaWduZWQtb2ZmLWJ5 OiBKdWxpZW4gR3JhbGwgPGp1bGllbi5ncmFsbEBhcm0uY29tPgo+ID4gPiAKPiA+ID4gLS0tCj4g PiA+ICAgICAgQ2hhbmdlcyBpbiB2MzoKPiA+ID4gICAgICAgICAgIC0gUGF0Y2ggYWRkZWQuIFRo ZSBjb2RlIHdhcyBwcmV2aW91c2x5IHBhcnQgb2YgIkRldGVjdAo+ID4gPiAgICAgICAgICAgc2ls aWNvbi4uLiIuCj4gPiA+IC0tLQo+ID4gPiAgIHhlbi9hcmNoL2FybS9jcHVmZWF0dXJlLmMgICAg ICAgIHwgMTYgKysrKysrKysrKysrKysrKwo+ID4gPiAgIHhlbi9pbmNsdWRlL2FzbS1hcm0vY3B1 ZmVhdHVyZS5oIHwgIDkgKysrKysrKysrCj4gPiA+ICAgMiBmaWxlcyBjaGFuZ2VkLCAyNSBpbnNl cnRpb25zKCspCj4gPiA+IAo+ID4gPiBkaWZmIC0tZ2l0IGEveGVuL2FyY2gvYXJtL2NwdWZlYXR1 cmUuYyBiL3hlbi9hcmNoL2FybS9jcHVmZWF0dXJlLmMKPiA+ID4gaW5kZXggN2ExYjU2Yi4uMDg4 NjI1YiAxMDA2NDQKPiA+ID4gLS0tIGEveGVuL2FyY2gvYXJtL2NwdWZlYXR1cmUuYwo+ID4gPiAr KysgYi94ZW4vYXJjaC9hcm0vY3B1ZmVhdHVyZS5jCj4gPiA+IEBAIC0yNCw2ICsyNCwyMiBAQAo+ ID4gPiAKPiA+ID4gICBERUNMQVJFX0JJVE1BUChjcHVfaHdjYXBzLCBBUk1fTkNBUFMpOwo+ID4g PiAKPiA+ID4gK3ZvaWQgdXBkYXRlX2NwdV9jYXBhYmlsaXRpZXMoY29uc3Qgc3RydWN0IGFybV9j cHVfY2FwYWJpbGl0aWVzICpjYXBzLAo+ID4gPiArICAgICAgICAgICAgICAgICAgICAgICAgICAg ICBjb25zdCBjaGFyICppbmZvKQo+ID4gPiArewo+ID4gPiArICAgIGludCBpOwo+ID4gPiArCj4g PiA+ICsgICAgZm9yICggaSA9IDA7IGNhcHNbaV0ubWF0Y2hlczsgaSsrICkKPiA+ID4gKyAgICB7 Cj4gPiA+ICsgICAgICAgIGlmICggIWNhcHNbaV0ubWF0Y2hlcygmY2Fwc1tpXSkgKQo+ID4gPiAr ICAgICAgICAgICAgY29udGludWU7Cj4gPiA+ICsKPiA+ID4gKyAgICAgICAgaWYgKCAhY3B1c19o YXZlX2NhcChjYXBzW2ldLmNhcGFiaWxpdHkpICYmIGNhcHNbaV0uZGVzYyApCj4gPiA+ICsgICAg ICAgICAgICBwcmludGsoWEVOTE9HX0lORk8gIiVzOiAlc1xuIiwgaW5mbywgY2Fwc1tpXS5kZXNj KTsKPiA+IAo+ID4gVGhlIHBhdGNoIGlzIE9LLiBJIHN0aWxsIGhhdmUgdGhlIHNhbWUgY29tbWVu dCBhcyBiZWZvcmU6IGlmIGFuIGluZm8KPiA+IHBhcmFtZXRlciBpcyBwYXNzZWQgdG8gdGhpcyBm dW5jdGlvbiB3aXRoIGEgc3RyaW5nLCB0aGVuIEkgdGhpbmsgdGhlCj4gPiBzdHJpbmcgc2hvdWxk IGNvbnRhaW4gc29tZSB1c2VmdWwgaW5mb3JtYXRpb24uIE5vdCBhIGdlbmVyaWMgbWVzc2FnZS4K PiAKPiBJdCBpcyB1c2VmdWwuIEFzIG1lbnRpb25lZCBpbiB0aGUgY29tbWl0IG1lc3NhZ2UgdGhl IHBhcmFtZXRlciAiaW5mbyIgaXMgdXNlZAo+IHRvIGRpc3BsYXkgdGhlIGtpbmQgb2YgY2FwYWJp bGl0eSB1cGRhdGVkIChlLmcgd29ya2Fyb3VuZCwgZmVhdHVyZSwgLi4uKS4KPiAKPiA+IEkgd291 bGQganVzdCBkbzoKPiA+IAo+ID4gICAgICBwcmludGsoWEVOTE9HX0lORk8gImVuYWJsZSB3b3Jr YXJvdW5kIGZvcjogJXNcbiIsIGNhcHNbaV0uZGVzYyk7Cj4gPiAKPiA+IElmIG9uZSBkYXkgd2Ug bmVlZCB0byBjaGFuZ2UgdGhlIG1lc3NhZ2UgZGVwZW5kaW5nIG9uIHRoZSBjYWxsZXIsIHRoZW4K PiA+IHRoYXQgZGF5IHdlJ2xsIGFkZCBhIHBhcmFtZXRlciB0byB1cGRhdGVfY3B1X2NhcGFiaWxp dGllcy4KPiAKPiBXZSBib3RoIGtub3cgdGhhdCB0aGlzIGZ1bmN0aW9uIHdpbGwgYmUgdXNlZCBm b3Igb3RoZXIgcHVycG9zZSB2ZXJ5IHNvb24uIFNvIEkKPiB3b3VsZCByYXRoZXIgYXZvaWQgdG8g bW9kaWZ5IGFnYWluIGluIHRoZSBmdXR1cmUuIFRoYXQgaXMgd2h5IEkgZGVzY3JpYmVkIHRoZQo+ IHB1cnBvc2UgaW4gdGhlIGNvbW1pdCBtZXNzYWdlLgoKSSBhbSB1bmNvbnZpbmNlZCwgYnV0IEkn bGwgbGVhdmUgaXQgYmUuCgpBY2tlZC1ieTogU3RlZmFubyBTdGFiZWxsaW5pIDxzc3RhYmVsbGlu aUBrZXJuZWwub3JnPgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwpodHRw Oi8vbGlzdHMueGVuLm9yZy94ZW4tZGV2ZWwK