From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel De Graaf Subject: Re: [PATCH v2 03/21] xen: allow console_io hypercalls from certain DomUs Date: Fri, 17 Aug 2018 15:41:20 -0400 Message-ID: <1f88ef8b-07cb-14d0-7f05-20a0971e7464@tycho.nsa.gov> References: <1530918736-13965-3-git-send-email-sstabellini@kernel.org> <856afaf8-9a0f-0668-86a4-ccf023275f1a@arm.com> <967a2077-36e9-3524-c5e9-73b48ec8913e@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <967a2077-36e9-3524-c5e9-73b48ec8913e@arm.com> Content-Language: en-US List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Julien Grall , Stefano Stabellini Cc: Stefano Stabellini , andrii_anisov@epam.com, George.Dunlap@eu.citrix.com, andrew.cooper3@citrix.com, ian.jackson@eu.citrix.com, xen-devel@lists.xen.org, tim@xen.org, jbeulich@suse.com, wei.liu2@citrix.com, nd@arm.com List-Id: xen-devel@lists.xenproject.org T24gMDcvMTkvMjAxOCAwNToxOSBBTSwgSnVsaWVuIEdyYWxsIHdyb3RlOgo+IEhpIFN0ZWZhbm8s Cj4gCj4gT24gMTgvMDcvMTggMTg6MTAsIFN0ZWZhbm8gU3RhYmVsbGluaSB3cm90ZToKPj4gT24g VHVlLCAxNyBKdWwgMjAxOCwgSnVsaWVuIEdyYWxsIHdyb3RlOgo+Pj4gSGkgU3RlZmFubywKPj4+ Cj4+PiBPbiAxNy8wNy8yMDE4IDIxOjA1LCBTdGVmYW5vIFN0YWJlbGxpbmkgd3JvdGU6Cj4+Pj4g T24gTW9uLCA5IEp1bCAyMDE4LCBKdWxpZW4gR3JhbGwgd3JvdGU6Cj4+Pj4+IEhpLAo+Pj4+Pgo+ Pj4+PiBPbiAwNy8wNy8xOCAwMDoxMSwgU3RlZmFubyBTdGFiZWxsaW5pIHdyb3RlOgo+Pj4+Pj4g SW50cm9kdWNlIGFuIGlzX2NvbnNvbGUgb3B0aW9uIHRvIGFsbG93IGNlcnRhaW4gY2xhc3NlcyBv ZiBkb21VcyB0byB1c2UKPj4+Pj4+IHRoZSBYZW4gY29uc29sZS4gU3BlY2lmaWNhbGx5LCBpdCB3 aWxsIGJlIHVzZWQgdG8gZ2l2ZSBjb25zb2xlIGFjY2VzcyB0bwo+Pj4+Pj4gYWxsIGRvbVVzIHN0 YXJ0ZWQgZnJvbSBYZW4gZnJvbSBpbmZvcm1hdGlvbiBvbiBkZXZpY2UgdHJlZS4KPj4+Pj4+Cj4+ Pj4+PiBTaWduZWQtb2ZmLWJ5OiBTdGVmYW5vIFN0YWJlbGxpbmkgPHN0ZWZhbm9zQHhpbGlueC5j b20+Cj4+Pj4+PiBDQzogYW5kcmV3LmNvb3BlcjNAY2l0cml4LmNvbQo+Pj4+Pj4gQ0M6IEdlb3Jn ZS5EdW5sYXBAZXUuY2l0cml4LmNvbQo+Pj4+Pj4gQ0M6IGlhbi5qYWNrc29uQGV1LmNpdHJpeC5j b20KPj4+Pj4+IENDOiBqYmV1bGljaEBzdXNlLmNvbQo+Pj4+Pj4gQ0M6IGtvbnJhZC53aWxrQG9y YWNsZS5jb20KPj4+Pj4+IENDOiB0aW1AeGVuLm9yZwo+Pj4+Pj4gQ0M6IHdlaS5saXUyQGNpdHJp eC5jb20KPj4+Pj4+IENDOiBkZ2RlZ3JhQHR5Y2hvLm5zYS5nb3YKPj4+Pj4+IC0tLQo+Pj4+Pj4g Q2hhbmdlcyBpbiB2MjoKPj4+Pj4+IC0gaW50cm9kdWNlIGlzX2NvbnNvbGUKPj4+Pj4+IC0gcmVt b3ZlICNpZmRlZnMKPj4+Pj4+IC0tLQo+Pj4+Pj4gwqDCoMKgIHhlbi9pbmNsdWRlL3hlbi9zY2hl ZC5oIHwgMiArKwo+Pj4+Pj4gwqDCoMKgIHhlbi9pbmNsdWRlL3hzbS9kdW1teS5oIHwgMiArKwo+ Pj4+Pj4gwqDCoMKgIHhlbi94c20vZmxhc2svaG9va3MuY8KgwqAgfCA1ICsrKystCj4+Pj4+PiDC oMKgwqAgMyBmaWxlcyBjaGFuZ2VkLCA4IGluc2VydGlvbnMoKyksIDEgZGVsZXRpb24oLSkKPj4+ Pj4+Cj4+Pj4+PiBkaWZmIC0tZ2l0IGEveGVuL2luY2x1ZGUveGVuL3NjaGVkLmggYi94ZW4vaW5j bHVkZS94ZW4vc2NoZWQuaAo+Pj4+Pj4gaW5kZXggOTlkMmFmMi4uZDY2Y2VjMCAxMDA2NDQKPj4+ Pj4+IC0tLSBhL3hlbi9pbmNsdWRlL3hlbi9zY2hlZC5oCj4+Pj4+PiArKysgYi94ZW4vaW5jbHVk ZS94ZW4vc2NoZWQuaAo+Pj4+Pj4gQEAgLTM3OSw2ICszNzksOCBAQCBzdHJ1Y3QgZG9tYWluCj4+ Pj4+PiDCoMKgwqDCoMKgwqDCoCBib29swqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIGF1dG9fbm9k ZV9hZmZpbml0eTsKPj4+Pj4+IMKgwqDCoMKgwqDCoMKgIC8qIElzIHRoaXMgZ3Vlc3QgZnVsbHkg cHJpdmlsZWdlZCAoYWthIGRvbTApPyAqLwo+Pj4+Pj4gwqDCoMKgwqDCoMKgwqAgYm9vbMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoCBpc19wcml2aWxlZ2VkOwo+Pj4+Pj4gK8KgwqDCoCAvKiBDYW4g dGhpcyBndWVzdCBhY2Nlc3MgdGhlIFhlbiBjb25zb2xlPyAqLwo+Pj4+Pj4gK8KgwqDCoCBib29s wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIGlzX2NvbnNvbGU7Cj4+Pj4+PiDCoMKgwqDCoMKgwqDC oCAvKiBJcyB0aGlzIGEgeGVuc3RvcmUgZG9tYWluIChub3QgZG9tMCk/ICovCj4+Pj4+PiDCoMKg wqDCoMKgwqDCoCBib29swqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIGlzX3hlbnN0b3JlOwo+Pj4+ Pj4gwqDCoMKgwqDCoMKgwqAgLyogRG9tYWluJ3MgVkNQVXMgYXJlIHBpbm5lZCAxOjEgdG8gcGh5 c2ljYWwgQ1BVcz8gKi8KPj4+Pj4+IGRpZmYgLS1naXQgYS94ZW4vaW5jbHVkZS94c20vZHVtbXku aCBiL3hlbi9pbmNsdWRlL3hzbS9kdW1teS5oCj4+Pj4+PiBpbmRleCBmZjZiMmRiLi4zODg4ODE3 IDEwMDY0NAo+Pj4+Pj4gLS0tIGEveGVuL2luY2x1ZGUveHNtL2R1bW15LmgKPj4+Pj4+ICsrKyBi L3hlbi9pbmNsdWRlL3hzbS9kdW1teS5oCj4+Pj4+PiBAQCAtMjMwLDYgKzIzMCw4IEBAIHN0YXRp YyBYU01fSU5MSU5FIGludAo+Pj4+Pj4geHNtX21lbW9yeV9zdGF0X3Jlc2VydmF0aW9uKFhTTV9E RUZBVUxUX0FSRyBzdHJ1Y3QgZG9tYWluCj4+Pj4+PiDCoMKgwqAgc3RhdGljIFhTTV9JTkxJTkUg aW50IHhzbV9jb25zb2xlX2lvKFhTTV9ERUZBVUxUX0FSRyBzdHJ1Y3QgZG9tYWluCj4+Pj4+PiAq ZCwgaW50Cj4+Pj4+PiBjbWQpCj4+Pj4+PiDCoMKgwqAgewo+Pj4+Pj4gwqDCoMKgwqDCoMKgwqAg WFNNX0FTU0VSVF9BQ1RJT04oWFNNX09USEVSKTsKPj4+Pj4+ICvCoMKgwqAgaWYgKCBkLT5pc19j b25zb2xlICkKPj4+Pj4+ICvCoMKgwqDCoMKgwqDCoCByZXR1cm4geHNtX2RlZmF1bHRfYWN0aW9u KFhTTV9IT09LLCBkLCBOVUxMKTsKPj4+Pj4KPj4+Pj4gSSB3aWxsIGxldCBEYW5pZWwgY29tbWVu dGluZyBvbiB0aGlzIGNoYW5nZS4gSG93ZXZlciAuLi4KPj4+Pj4KPj4+Pj4+IMKgwqDCoCAjaWZk ZWYgQ09ORklHX1ZFUkJPU0VfREVCVUcKPj4+Pj4+IMKgwqDCoMKgwqDCoMKgIGlmICggY21kID09 IENPTlNPTEVJT193cml0ZSApCj4+Pj4+PiDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIHJldHVybiB4 c21fZGVmYXVsdF9hY3Rpb24oWFNNX0hPT0ssIGQsIE5VTEwpOwo+Pj4+Pj4gZGlmZiAtLWdpdCBh L3hlbi94c20vZmxhc2svaG9va3MuYyBiL3hlbi94c20vZmxhc2svaG9va3MuYwo+Pj4+Pj4gaW5k ZXggNzhiYzMyNi4uMjU1MWU0ZSAxMDA2NDQKPj4+Pj4+IC0tLSBhL3hlbi94c20vZmxhc2svaG9v a3MuYwo+Pj4+Pj4gKysrIGIveGVuL3hzbS9mbGFzay9ob29rcy5jCj4+Pj4+PiBAQCAtNDQzLDcg KzQ0MywxMCBAQCBzdGF0aWMgaW50IGZsYXNrX2NvbnNvbGVfaW8oc3RydWN0IGRvbWFpbiAqZCwg aW50Cj4+Pj4+PiBjbWQpCj4+Pj4+PiDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIHJldHVybiBhdmNf dW5rbm93bl9wZXJtaXNzaW9uKCJjb25zb2xlX2lvIiwgY21kKTsKPj4+Pj4+IMKgwqDCoMKgwqDC oMKgIH0KPj4+Pj4+IMKgwqDCoCAtwqDCoMKgIHJldHVybiBkb21haW5faGFzX3hlbihkLCBwZXJt KTsKPj4+Pj4+ICvCoMKgwqAgaWYgKCAhZC0+aXNfY29uc29sZSApCj4+Pj4+PiArwqDCoMKgwqDC oMKgwqAgcmV0dXJuIGRvbWFpbl9oYXNfeGVuKGQsIHBlcm0pOwo+Pj4+Pj4gK8KgwqDCoCBlbHNl Cj4+Pj4+PiArwqDCoMKgwqDCoMKgwqAgcmV0dXJuIDA7Cj4+Pj4+Cj4+Pj4+IC4uLiBJIGRvbid0 IHRoaW5rIHRoaXMgY2hhbmdlIGlzIGNvcnJlY3QuIFdoZW4gYSBwb2xpY3kgaXMgdXNlZCwgdGhl IHVzZXIKPj4+Pj4gaXMKPj4+Pj4gZnJlZSB0byBkZWZpbmUgd2hhdCBpcyB0aGUgYmVoYXZpb3Iu IFdpdGggeW91ciBzb2x1dGlvbiwgeW91IGltcG9zZSB0aGUKPj4+Pj4gY29uc29sZSBhY2Nlc3Mg ZXZlbiBpZiB0aGUgdXNlciBkaWRuJ3QgdG8gbm90IGdpdmUgdGhlIHBlcm1pc3Npb24uCj4+Pj4K Pj4+PiBJIHdhcyBob3BpbmcgRGFuaWVsIHdvdWxkIGFkdmlzZSBvbiB0aGUgYmVzdCB3YXkgdG8g ZG8gdGhpbmdzIGhlcmUuCj4+Pj4KPj4+PiBJIHRob3VnaHQgdGhhdCB0aGUgaWRlYSB3YXMgdGhh dCBncmFudGluZyBhIGRvbWFpbiAiaXNfY29uc29sZSIgaXMKPj4+PiBlcXVpdmFsZW50IHRvIGdy YW50aW5nIGEgZG9tYWluIFhFTl9fUkVBRENPTlNPTEUgYW5kIFhFTl9fV1JJVEVDT05TT0xFCj4+ Pj4gcGVybWlzc2lvbnMuwqAgVGh1cywgaWYgaXNfY29uc29sZSBpcyBzZXQsIHdlIHJldHVybiAw IGZyb20KPj4+PiBmbGFza19jb25zb2xlX2lvIGJlY2F1c2UgdGhlIHBlcm1pc3Npb25zIGNoZWNr IHN1Y2NlZWRzLgo+Pj4KPj4+IFdlbGwsIHllcyBhbmQgbm8uIFRoYXQncyBlcXVpdmFsZW50IHdo ZW4geW91IHVzZSB0aGUgZHVtbXkgcG9saWN5LiBXaGVuIHlvdQo+Pj4gaGF2ZSBhIGZsYXNrIHBv bGljeSB5b3Ugd2FudCB0byBnaXZlIHRoZSBjb250cm9sIHRvIHRoZSB1c2VyLgo+Pj4KPj4+IElm IHlvdSBsb29rIGF0IHRoZSBjb2RlIHRoZXJlIGFyZSBubyBzdWNoIGFzIGQtPmlzX3ByaXZpbGVn ZSBpbiB0aGF0IGZ1bmN0aW9uLgo+Pj4gVGhpcyBtZWFucyB0aGF0IHRoZSB1c2VyIGRlZmluZSB0 aGUgcG9saWN5IGZvciB0aGUgaGFyZHdhcmUgZG9tYWluLiBXaHkgd291bGQKPj4+IGJlIGQtPmlz X2NvbnNvbGUgZGlmZmVyZW50IGhlcmU/Cj4+Cj4+IFlvdSBhcmUgc2F5aW5nIHRoYXQgaW4gaG9v a3MuYyB0aGUgY2hlY2sgc2hvdWxkIHJlbWFpbiBleGFjdGx5IGFzIGlzOgo+Pgo+PiDCoMKgIHJl dHVybiBkb21haW5faGFzX3hlbihkLCBwZXJtKTsKPj4KPj4gYW5kIGQtPmlzX2NvbnNvbGUgc2hv dWxkIG5vdCBiZSB0ZXN0ZWQ/Cj4gCj4gWWVzLgo+IAo+PiBJbiB0aGF0IGNhc2UsIGRvIHlvdSBr bm93IGlmIEkKPj4gbmVlZCB0byBkbyBhbnl0aGluZyBzcGVjaWFsIHdpdGggWEVOX19SRUFEQ09O U09MRSBhbmQgWEVOX19XUklURUNPTlNPTEUKPj4gcGVybWlzc2lvbnMgZm9yIHRoZSBpbml0aWFs IGJvb3QgZG9tYWlucyAoc3VjaCBhcyBhZGRpbmcgdGhvc2UKPj4gcGVybWlzc2lvbnMgYXMgdGhl IHNhbWUgdGltZSBkLT5pc19jb25zb2xlIGlzIHNldCk/Cj4gCj4gVGhlIG1haW4gcHVycG9zZSBv ZiBYU00gaXMgdG8gcHJvdmlkZSBhIGZpbmUgZ3JhaW4gcGVybWlzc2lvbiBmb3IgdGhlIHVzZXIg dG8gY29uZmlndXJlLiBGb3IgaW5zdGFuY2UsIGEgdXNlciBtYXkgbm90IGNvbnNvbGUgYWNjZXNz IGZvciBpbml0aWFsIGRvbWFpbiBmb3Igc2VjdXJpdHkgcHVycG9zZS4gU28geW91IGRvbid0IGhh dmUgYW55dGhpbmcgdG8gaW4gdGhlIGNvZGUuCj4gCj4gSG93ZXZlciwgd2hlbiB5b3UgaGF2ZSBY U00gZW5hYmxlZCwgeW91IHdpbGwgaGF2ZSB0byB3cml0ZSBkb3duIGluIHRoZSBwb2xpY3kgdGhh dCBpbml0aWFsIGRvbWFpbnMgd2lsbCBoYXZlIGNvbnNvbGUgYWNjZXNzLiBBbHRob3VnaCwgSSBh bSBub3Qgc3VyZSBob3cgdG8gd3JpdGUgdGhhdCBpbiB0aGUgcG9saWN5LgoKSW4gYSBzZWN1cml0 eSBwb2xpY3kgdGhhdCB3aXNoZXMgdG8gbWFrZSB0aGlzIGRpc3RpbmN0aW9uLCB0aGUgaW5pdGlh bCBkb21haW5zIHdpbGwKaGF2ZSBkaXN0aW5jdCBzZWN1cml0eSBsYWJlbHMgZnJvbSBkb21haW5z IGNyZWF0ZWQgbGF0ZXIuICBUaGVuLCB0aG9zZSB0eXBlcyBhcmUKYWxsb3dlZCBjb25zb2xlX3dy aXRlIGFjY2VzcyAoYWxvbmcgd2l0aCBhbnkgb3RoZXIgc3BlY2lhbCByaWdodHMgdGhleSBtYXkg bmVlZCkuCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpY ZW4tZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0Lm9yZwpodHRw czovL2xpc3RzLnhlbnByb2plY3Qub3JnL21haWxtYW4vbGlzdGluZm8veGVuLWRldmVs