From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vitaly Kuznetsov Subject: Re: [RFC] xen/pvh: detect PVH after kexec Date: Tue, 21 Mar 2017 15:44:39 +0100 Message-ID: <87inn28zag.fsf@vitty.brq.redhat.com> References: <20170320182042.6103-1-vkuznets@redhat.com> <5ef043a0-2382-79b2-196a-af214fc68fd4@oracle.com> <87efxr9e8f.fsf@vitty.brq.redhat.com> <20170321100115.c52rcfmhopgkbczd@dhcp-3-128.uk.xensource.com> <87var2978c.fsf@vitty.brq.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cqL1g-0004hy-Hw for xen-devel@lists.xenproject.org; Tue, 21 Mar 2017 14:44:44 +0000 In-Reply-To: <87var2978c.fsf@vitty.brq.redhat.com> (Vitaly Kuznetsov's message of "Tue, 21 Mar 2017 12:53:07 +0100") List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Roger Pau Monne Cc: Juergen Gross , xen-devel@lists.xenproject.org, Boris Ostrovsky List-Id: xen-devel@lists.xenproject.org Vml0YWx5IEt1em5ldHNvdiA8dmt1em5ldHNAcmVkaGF0LmNvbT4gd3JpdGVzOgoKPiBSb2dlciBQ YXUgTW9ubmUgPHJvZ2VyLnBhdUBjaXRyaXguY29tPiB3cml0ZXM6Cj4KPj4gT24gVHVlLCBNYXIg MjEsIDIwMTcgYXQgMTA6MjE6NTJBTSArMDEwMCwgVml0YWx5IEt1em5ldHNvdiB3cm90ZToKPj4+ IEJvcmlzIE9zdHJvdnNreSA8Ym9yaXMub3N0cm92c2t5QG9yYWNsZS5jb20+IHdyaXRlczoKPj4+ IAo+Pj4gPiBPbiAwMy8yMC8yMDE3IDAyOjIwIFBNLCBWaXRhbHkgS3V6bmV0c292IHdyb3RlOgo+ Pj4gPj4gUFZIIGd1ZXN0cyBhZnRlciBrZXhlYyBib290IGxpa2Ugbm9ybWFsIEhWTSBndWVzdHMg YW5kIHdlJ3JlIG5vdCBlbnRlcmluZwo+Pj4gPj4geGVuX3ByZXBhcmVfcHZoKCkKPj4+ID4KPj4+ ID4gSXMgaXQgbm90PyBBcmVuJ3Qgd2UgZ29pbmcgdmlhIHhlbl9odm1fc2h1dGRvd24oKSBhbmQg dGhlbgo+Pj4gPiBTSFVURE9XTl9zb2Z0X3Jlc2V0IHdoaWNoIHdvdWxkIHJlc3RhcnQgYXQgdGhl IHNhbWUgZW50cnkgcG9pbnQgYXMKPj4+ID4gcmVndWxhciBib290Pwo+Pj4gCj4+PiBObywgd2Un cmUgbm90IGRvaW5nIHJlZ3VsYXIgYm9vdDogZnJvbSBvdXRzaWRlIG9mIHRoZSBndWVzdCB3ZSBk b24ndAo+Pj4gcmVhbGx5IGtub3cgd2hlcmUgdGhlIG5ldyBrZXJuZWwgaXMgcGxhY2VkIChhcyBn dWVzdCBkb2VzIGl0IG9uIGl0cwo+Pj4gb3duKS4gV2UgZG8gc29mdCByZXNldCB0byBjbGVhbiB0 aGluZ3MgdXAgYW5kIHRoZW4gZ3Vlc3QganVtcHMgdG8gdGhlCj4+PiBuZXcga2VybmVsIHN0YXJ0 aW5nIHBvaW50IGJ5IGl0c2VsZi4KPj4+IAo+Pj4gV2UgY291bGQgKGluIHRoZW9yeSwgZGlkbid0 IHRyeSkgbWFrZSBpdCBqdW1wIHRvIHRoZSBQVkggc3RhcnRpbmcgcG9pbnQKPj4+IGJ1dCB3ZSds bCBoYXZlIHRvIGF0IGxlYXN0IHByZXBhcmUgdGhlIHJpZ2h0IGJvb3QgcGFyYW1zIGZvcgo+Pj4g aW5pdF9wdmhfYm9vdHBhcmFtcyBhbmQgdGhpcyBsb29rcyBsaWtlIGFkZGl0aW9uYWwKPj4+IGNv bXBsaWNhdGlvbi4gUFZIVk0tc3R5bGUgc3RhcnR1cCBzdWl0cyB1cyB3ZWxsIGJ1dCB3ZSBzdGls bCBuZWVkIHRvIGJlCj4+PiBQVkgtYXdhcmUuCj4+Cj4+IFdlIGFyZSBnb2luZyB0byBoYXZlIHRo ZSBzYW1lIGlzc3VlIHdoZW4gYm9vdGluZyBQVkggd2l0aCBPVk1GLCBMaW51eCB3aWxsIGJlCj4+ IHN0YXJ0ZWQgYXQgdGhlIG5hdGl2ZSBVRUZJIGVudHJ5IHBvaW50LCBhbmQgd2Ugd2lsbCBuZWVk IHNvbWUgd2F5IHRvIGRldGVjdAo+PiB0aGF0IHdlIGFyZSBydW5uaW5nIGluIFBWSCBtb2RlLgo+ Pgo+PiBXaGF0IGlzc3VlcyBkbyB5b3Ugc2VlIHdoZW4gdXNpbmcgdGhlIEhWTSBib290IHBhdGgg Zm9yIGtleGVjPwo+Cj4gVGhlIGltbWVkaWF0ZSBpc3N1ZSBJIHJhbiBpbnRvIHdhcyBiYWxsb29u aW5nIGRyaXZlciBvdmVyLWFsbG9jYXRpbmcKPiB3aXRoIFhFTk1FTV9wb3B1bGF0ZV9waHlzbWFw Ogo+Cj4gKFhFTikgRG9tMTUgY2FsbGJhY2sgdmlhIGNoYW5nZWQgdG8gRGlyZWN0IFZlY3RvciAw eGYzCj4gKFhFTikgZDE1djAgT3Zlci1hbGxvY2F0aW9uIGZvciBkb21haW4gMTU6IDI2MjQwMSA+ IDI2MjQwMAo+IChYRU4pIG1lbW9yeS5jOjIyNTpkMTV2MCBDb3VsZCBub3QgYWxsb2NhdGUgb3Jk ZXI9MCBleHRlbnQ6IGlkPTE1IG1lbWZsYWdzPTAgKDE3NSBvZiA1MTIpCj4gKFhFTikgZDE1djAg T3Zlci1hbGxvY2F0aW9uIGZvciBkb21haW4gMTU6IDI2MjQwMSA+IDI2MjQwMAo+IChYRU4pIG1l bW9yeS5jOjIyNTpkMTV2MCBDb3VsZCBub3QgYWxsb2NhdGUgb3JkZXI9MCBleHRlbnQ6IGlkPTE1 IG1lbWZsYWdzPTAgKDAgb2YgNTEyKQo+IChYRU4pIGQxNXYwIE92ZXItYWxsb2NhdGlvbiBmb3Ig ZG9tYWluIDE1OiAyNjI0MDEgPiAyNjI0MDAKPiAuLi4KPgo+IEkgZGlkbid0IGludmVzdGlnYXRl IHdoeSBpdCBoYXBwZW5zLCBzZXR0aW5nIHhlbl9wdmg9MSBoZWxwZWQuIE5vdCBzdXJlCj4gaWYg aXQncyByZWxhdGVkLCBidXQgSSBzZWUgdGhlIGZvbGxvd2luZyBjb2RlIGluIF9fZ250dGFiX2lu aXQoKToKPgo+IAkvKiBEZWxheSBncmFudC10YWJsZSBpbml0aWFsaXphdGlvbiBpbiB0aGUgUFYg b24gSFZNIGNhc2UgKi8KPiAJaWYgKHhlbl9odm1fZG9tYWluKCkgJiYgIXhlbl9wdmhfZG9tYWlu KCkpCj4gCQlyZXR1cm4gMDsKPgo+IGFuZCBnbnR0YWJfaW5pdCgpIGlzIGxhdGVyIGNhbGxlZCBp biBwbGF0Zm9ybV9wY2lfcHJvYmUoKS4KClR3byBtb3JlIHRoaW5nczoKClRoZXJlIGlzIHhlbl9w dmhfZ250dGFiX3NldHVwKCkgaW5pdGNhbGwgd2hpY2ggZG9lcyAKCiAJaWYgKCF4ZW5fcHZoX2Rv bWFpbigpKQogICAgICAgICAgICAgICAgcmV0dXJuIC1FTk9ERVY7CgphbmQgdGhpcyBpcyBwcm9i YWJseSB0aGUgc291cmNlIG9mIG92ZXItYWxsb2NhdGlvbi4KCnhlbl9oYXNfcHZfZGV2aWNlcygp IGhhcyB0aGUgZm9sbG93aW5nOgoKICAgICAgICBpZiAoeGVuX3B2X2RvbWFpbigpIHx8IHhlbl9w dmhfZG9tYWluKCkpCiAgICAgICAgICAgICAgICByZXR1cm4gdHJ1ZTsKCndoaWNoIGFsc28gaGFz IHRvIGJlIHBhdGNoZWQgZm9yIFBWSC1hZnRlci1rZXhlYy4gU28gaXQgc2VlbXMgd2UgZWl0aGVy CmhhdmUgdG8gcmVtb3ZlIGFsbCB0aGlzIHN0dWZmIHNvbWVob3cgb3IgbWFrZSBQVkgtbmVzcyBk ZXRlY3RhYmxlLi4uCgotLSAKICBWaXRhbHkKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVsQGxpc3Rz Lnhlbi5vcmcKaHR0cHM6Ly9saXN0cy54ZW4ub3JnL3hlbi1kZXZlbAo=