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 12:53:07 +0100 Message-ID: <87var2978c.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> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cqILg-0007aX-66 for xen-devel@lists.xenproject.org; Tue, 21 Mar 2017 11:53:12 +0000 In-Reply-To: <20170321100115.c52rcfmhopgkbczd@dhcp-3-128.uk.xensource.com> (Roger Pau Monne's message of "Tue, 21 Mar 2017 10:01:15 +0000") 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 Um9nZXIgUGF1IE1vbm5lIDxyb2dlci5wYXVAY2l0cml4LmNvbT4gd3JpdGVzOgoKPiBPbiBUdWUs IE1hciAyMSwgMjAxNyBhdCAxMDoyMTo1MkFNICswMTAwLCBWaXRhbHkgS3V6bmV0c292IHdyb3Rl Ogo+PiBCb3JpcyBPc3Ryb3Zza3kgPGJvcmlzLm9zdHJvdnNreUBvcmFjbGUuY29tPiB3cml0ZXM6 Cj4+IAo+PiA+IE9uIDAzLzIwLzIwMTcgMDI6MjAgUE0sIFZpdGFseSBLdXpuZXRzb3Ygd3JvdGU6 Cj4+ID4+IFBWSCBndWVzdHMgYWZ0ZXIga2V4ZWMgYm9vdCBsaWtlIG5vcm1hbCBIVk0gZ3Vlc3Rz IGFuZCB3ZSdyZSBub3QgZW50ZXJpbmcKPj4gPj4geGVuX3ByZXBhcmVfcHZoKCkKPj4gPgo+PiA+ IElzIGl0IG5vdD8gQXJlbid0IHdlIGdvaW5nIHZpYSB4ZW5faHZtX3NodXRkb3duKCkgYW5kIHRo ZW4KPj4gPiBTSFVURE9XTl9zb2Z0X3Jlc2V0IHdoaWNoIHdvdWxkIHJlc3RhcnQgYXQgdGhlIHNh bWUgZW50cnkgcG9pbnQgYXMKPj4gPiByZWd1bGFyIGJvb3Q/Cj4+IAo+PiBObywgd2UncmUgbm90 IGRvaW5nIHJlZ3VsYXIgYm9vdDogZnJvbSBvdXRzaWRlIG9mIHRoZSBndWVzdCB3ZSBkb24ndAo+ PiByZWFsbHkga25vdyB3aGVyZSB0aGUgbmV3IGtlcm5lbCBpcyBwbGFjZWQgKGFzIGd1ZXN0IGRv ZXMgaXQgb24gaXRzCj4+IG93bikuIFdlIGRvIHNvZnQgcmVzZXQgdG8gY2xlYW4gdGhpbmdzIHVw IGFuZCB0aGVuIGd1ZXN0IGp1bXBzIHRvIHRoZQo+PiBuZXcga2VybmVsIHN0YXJ0aW5nIHBvaW50 IGJ5IGl0c2VsZi4KPj4gCj4+IFdlIGNvdWxkIChpbiB0aGVvcnksIGRpZG4ndCB0cnkpIG1ha2Ug aXQganVtcCB0byB0aGUgUFZIIHN0YXJ0aW5nIHBvaW50Cj4+IGJ1dCB3ZSdsbCBoYXZlIHRvIGF0 IGxlYXN0IHByZXBhcmUgdGhlIHJpZ2h0IGJvb3QgcGFyYW1zIGZvcgo+PiBpbml0X3B2aF9ib290 cGFyYW1zIGFuZCB0aGlzIGxvb2tzIGxpa2UgYWRkaXRpb25hbAo+PiBjb21wbGljYXRpb24uIFBW SFZNLXN0eWxlIHN0YXJ0dXAgc3VpdHMgdXMgd2VsbCBidXQgd2Ugc3RpbGwgbmVlZCB0byBiZQo+ PiBQVkgtYXdhcmUuCj4KPiBXZSBhcmUgZ29pbmcgdG8gaGF2ZSB0aGUgc2FtZSBpc3N1ZSB3aGVu IGJvb3RpbmcgUFZIIHdpdGggT1ZNRiwgTGludXggd2lsbCBiZQo+IHN0YXJ0ZWQgYXQgdGhlIG5h dGl2ZSBVRUZJIGVudHJ5IHBvaW50LCBhbmQgd2Ugd2lsbCBuZWVkIHNvbWUgd2F5IHRvIGRldGVj dAo+IHRoYXQgd2UgYXJlIHJ1bm5pbmcgaW4gUFZIIG1vZGUuCj4KPiBXaGF0IGlzc3VlcyBkbyB5 b3Ugc2VlIHdoZW4gdXNpbmcgdGhlIEhWTSBib290IHBhdGggZm9yIGtleGVjPwoKVGhlIGltbWVk aWF0ZSBpc3N1ZSBJIHJhbiBpbnRvIHdhcyBiYWxsb29uaW5nIGRyaXZlciBvdmVyLWFsbG9jYXRp bmcKd2l0aCBYRU5NRU1fcG9wdWxhdGVfcGh5c21hcDoKCihYRU4pIERvbTE1IGNhbGxiYWNrIHZp YSBjaGFuZ2VkIHRvIERpcmVjdCBWZWN0b3IgMHhmMwooWEVOKSBkMTV2MCBPdmVyLWFsbG9jYXRp b24gZm9yIGRvbWFpbiAxNTogMjYyNDAxID4gMjYyNDAwCihYRU4pIG1lbW9yeS5jOjIyNTpkMTV2 MCBDb3VsZCBub3QgYWxsb2NhdGUgb3JkZXI9MCBleHRlbnQ6IGlkPTE1IG1lbWZsYWdzPTAgKDE3 NSBvZiA1MTIpCihYRU4pIGQxNXYwIE92ZXItYWxsb2NhdGlvbiBmb3IgZG9tYWluIDE1OiAyNjI0 MDEgPiAyNjI0MDAKKFhFTikgbWVtb3J5LmM6MjI1OmQxNXYwIENvdWxkIG5vdCBhbGxvY2F0ZSBv cmRlcj0wIGV4dGVudDogaWQ9MTUgbWVtZmxhZ3M9MCAoMCBvZiA1MTIpCihYRU4pIGQxNXYwIE92 ZXItYWxsb2NhdGlvbiBmb3IgZG9tYWluIDE1OiAyNjI0MDEgPiAyNjI0MDAKLi4uCgpJIGRpZG4n dCBpbnZlc3RpZ2F0ZSB3aHkgaXQgaGFwcGVucywgc2V0dGluZyB4ZW5fcHZoPTEgaGVscGVkLiBO b3Qgc3VyZQppZiBpdCdzIHJlbGF0ZWQsIGJ1dCBJIHNlZSB0aGUgZm9sbG93aW5nIGNvZGUgaW4g X19nbnR0YWJfaW5pdCgpOgoKCS8qIERlbGF5IGdyYW50LXRhYmxlIGluaXRpYWxpemF0aW9uIGlu IHRoZSBQViBvbiBIVk0gY2FzZSAqLwoJaWYgKHhlbl9odm1fZG9tYWluKCkgJiYgIXhlbl9wdmhf ZG9tYWluKCkpCgkJcmV0dXJuIDA7CgphbmQgZ250dGFiX2luaXQoKSBpcyBsYXRlciBjYWxsZWQg aW4gcGxhdGZvcm1fcGNpX3Byb2JlKCkuCgotLSAKICBWaXRhbHkKCl9fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVu LWRldmVsQGxpc3RzLnhlbi5vcmcKaHR0cHM6Ly9saXN0cy54ZW4ub3JnL3hlbi1kZXZlbAo=