From mboxrd@z Thu Jan 1 00:00:00 1970 From: George Dunlap Subject: Re: [PATCH] x86/p2m: Stop other vcpus using a nested p2m before clearing it Date: Wed, 8 Feb 2017 18:08:03 +0000 Message-ID: References: <1486493293-2644-1-git-send-email-andrew.cooper3@citrix.com> <589B27A20200007800137B78@prv-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Andrew Cooper , Jan Beulich Cc: George Dunlap , Tim Deegan , Xen-devel List-Id: xen-devel@lists.xenproject.org T24gMDgvMDIvMTcgMTg6MDYsIEdlb3JnZSBEdW5sYXAgd3JvdGU6Cj4gT24gMDgvMDIvMTcgMTM6 MjAsIEFuZHJldyBDb29wZXIgd3JvdGU6Cj4+IE9uIDA4LzAyLzE3IDEzOjEzLCBKYW4gQmV1bGlj aCB3cm90ZToKPj4+Pj4+IE9uIDA3LjAyLjE3IGF0IDE5OjQ4LCA8YW5kcmV3LmNvb3BlcjNAY2l0 cml4LmNvbT4gd3JvdGU6Cj4+Pj4gVW50aWwgdGhlIElQSSBoYXMgY29tcGxldGVkLCBvdGhlciBw cm9jZXNzb3JzIG1pZ2h0IGJlIHJ1bm5pbmcgb24gdGhpcyBuZXN0ZWQKPj4+PiBwMm0gb2JqZWN0 LiAgY2xlYXJfZG9tYWluX3BhZ2UoKSBkb2VzIG5vdCBndWFyYW50ZWUgdG8gbWFrZSA4LWJ5dGUg YXRvbWljCj4+Pj4gdXBkYXRlcywgd2hpY2ggbWVhbnMgdGhhdCBhIHBhZ2V3YWxrIG9uIGEgcmVt b3RlIHByb2Nlc3NvciBtaWdodCBlbmNvdW50ZXIgYQo+Pj4+IHBhcnRpYWwgdXBkYXRlLgo+Pj4+ Cj4+Pj4gVGhpcyBpcyBjdXJyZW50bHkgc2FmZSBhcyBvdGhlciBpc3N1ZXMgcHJldmVudHMgYSBu ZXN0ZWQgcDJtIGV2ZXIgYmVpbmcgc2hhcmVkCj4+Pj4gYmV0d2VlbiB0d28gY3B1cyAoYWx0aG91 Z2ggdGhpcyBpcyBjb250cmFyeSB0byB0aGUgb3JpZ2luYWwgcGxhbikuCj4+Pj4KPj4+PiBTZXR0 aW5nIHAybS0+bnAybV9iYXNlIHRvIFAyTV9CQVNFX0VBRERSIGJlZm9yZSB0aGUgSVBJIGVuc3Vy ZXMgdGhhdCB0aGUgSVBJJ2QKPj4+PiBwcm9jZXNzb3JzIHdvbid0IGNvbnRpbnVlIHRvIHVzZSB0 aGUgZmx1c2hlZCBtYXBwaW5ncy4KPj4+Pgo+Pj4+IFdoaWxlIG1vZGlmeWluZyB0aGlzIGZ1bmN0 aW9uLCByZW1vdmUgYWxsIHRoZSB0cmFpbGluZyB3aGl0ZXNwYWNlIGFuZCB0d2Vhawo+Pj4+IHN0 eWxlIGluIHRoZSBhZmZlY3RlZCBhcmVhcy4KPj4+Pgo+Pj4+IFNpZ25lZC1vZmYtYnk6IEFuZHJl dyBDb29wZXIgPGFuZHJldy5jb29wZXIzQGNpdHJpeC5jb20+Cj4+PiBSZXZpZXdlZC1ieTogSmFu IEJldWxpY2ggPGpiZXVsaWNoQHN1c2UuY29tPgo+Pj4gYnV0IC4uLgo+Pj4KPj4+PiBAQCAtMTYz MywxOSArMTYzNSwyMSBAQCBwMm1fZmx1c2hfdGFibGUoc3RydWN0IHAybV9kb21haW4gKnAybSkK Pj4+PiAgCj4+Pj4gICAgICAvKiBUaGlzIGlzIG5vIGxvbmdlciBhIHZhbGlkIG5lc3RlZCBwMm0g Zm9yIGFueSBhZGRyZXNzIHNwYWNlICovCj4+Pj4gICAgICBwMm0tPm5wMm1fYmFzZSA9IFAyTV9C QVNFX0VBRERSOwo+Pj4+IC0gICAgCj4+Pj4gLSAgICAvKiBaYXAgdGhlIHRvcCBsZXZlbCBvZiB0 aGUgdHJpZSAqLwo+Pj4+IC0gICAgbWZuID0gcGFnZXRhYmxlX2dldF9tZm4ocDJtX2dldF9wYWdl dGFibGUocDJtKSk7Cj4+Pj4gLSAgICBjbGVhcl9kb21haW5fcGFnZShtZm4pOwo+Pj4+ICAKPj4+ PiAgICAgIC8qIE1ha2Ugc3VyZSBub2JvZHkgZWxzZSBpcyB1c2luZyB0aGlzIHAybSB0YWJsZSAq Lwo+Pj4+ICAgICAgbmVzdGVkaHZtX3ZtY3hfZmx1c2h0bGIocDJtKTsKPj4+PiAgCj4+Pj4gKyAg ICAvKiBaYXAgdGhlIHRvcCBsZXZlbCBvZiB0aGUgdHJpZSAqLwo+Pj4gcy90cmllL3RyZWUvIGhl cmUsIGFzIHlvdSB0b3VjaCBpdCBhbnl3YXk/Cj4+Cj4+IFRyaWUgaGVyZSByZWZlcnMgdG8gdGhl IGRhdGFzdHJ1Y3R1cmUgaHR0cHM6Ly9lbi53aWtpcGVkaWEub3JnL3dpa2kvVHJpZQo+PiB3aGlj aCBpcyB0aGUgc3RydWN0dXJlIGltcGxlbWVudGVkIGJ5IHByb2Nlc3NvciBwYWdldGFibGVzLiAg SXQgaXMgbW9yZQo+PiBzcGVjaWZpYyB0aGFuIGp1c3QgY2FsbGluZyB0aGVtIHRyZWVzLgo+IAo+ IE5ldmVyIGhlYXJkIHRoYXQgYmVmb3JlLCBidXQgd2Ugc2VlbSB0byBhbHJlYWR5IGhhdmUgYXQg bGVhc3Qgc2l4Cj4gaW5zdGFuY2VzIGluIHRoZSBoeXBlcnZpc29yIChhbmQgYW4gb2NhbWwgZmls ZSBjYWxsZWQgJ3RyaWUubWxpJyksIHNvIEkKPiBndWVzcyB0aGVyZSdzIHByZWNlZGVudC4gOi0p Cj4gCj4gUmV2aWV3ZWQtYnk6IEdlb3JnZSBEdW5sYXAgPGdlb3JnZS5kdW5sYXBAY2l0cml4LmNv bT4KPiAKPiBJJ2xsIGNoZWNrIHRoaXMgb25lIGluLgoKT3IgbWF5YmUgSSB3b24ndC4gOi0pCgog LUdlb3JnZQoKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f Clhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVsQGxpc3RzLnhlbi5vcmcKaHR0cHM6Ly9s aXN0cy54ZW4ub3JnL3hlbi1kZXZlbAo=