From mboxrd@z Thu Jan 1 00:00:00 1970 From: Juergen Gross Subject: Re: [PATCH v2 2/3] xen: add hypercall option to temporarily pin a vcpu Date: Wed, 2 Mar 2016 08:14:11 +0100 Message-ID: <56D692C3.4010509@suse.com> References: <1456822933-25041-1-git-send-email-jgross@suse.com> <1456822933-25041-3-git-send-email-jgross@suse.com> <56D5BACD.1030502@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <56D5BACD.1030502@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: George Dunlap , xen-devel@lists.xen.org Cc: wei.liu2@citrix.com, stefano.stabellini@eu.citrix.com, george.dunlap@eu.citrix.com, andrew.cooper3@citrix.com, dario.faggioli@citrix.com, ian.jackson@eu.citrix.com, david.vrabel@citrix.com, jbeulich@suse.com List-Id: xen-devel@lists.xenproject.org T24gMDEvMDMvMTYgMTY6NTIsIEdlb3JnZSBEdW5sYXAgd3JvdGU6Cj4gT24gMDEvMDMvMTYgMDk6 MDIsIEp1ZXJnZW4gR3Jvc3Mgd3JvdGU6Cj4+IFNvbWUgaGFyZHdhcmUgKGUuZy4gRGVsbCBzdHVk aW8gMTU1NSBsYXB0b3BzKSByZXF1aXJlIFNNSXMgdG8gYmUKPj4gY2FsbGVkIG9uIHBoeXNpY2Fs IGNwdSAwIG9ubHkuIExpbnV4IGRyaXZlcnMgbGlrZSBkY2RiYXMgb3IgaThrIHRyeQo+PiB0byBh Y2hpZXZlIHRoaXMgYnkgcGlubmluZyB0aGUgcnVubmluZyB0aHJlYWQgdG8gY3B1IDAsIGJ1dCBp biBEb20wCj4+IHRoaXMgaXMgbm90IGVub3VnaDogdGhlIHZjcHUgbXVzdCBiZSBwaW5uZWQgdG8g cGh5c2ljYWwgY3B1IDAgdmlhCj4+IFhlbiwgdG9vLgo+Pgo+PiBBZGQgYSBzdGFibGUgaHlwZXJj YWxsIG9wdGlvbiBTQ0hFRE9QX3Bpbl90ZW1wIHRvIHRoZSBzY2hlZF9vcAo+PiBoeXBlcmNhbGwg dG8gYWNoaWV2ZSB0aGlzLiBJdCBpcyB0YWtpbmcgYSBwaHlzaWNhbCBjcHUgbnVtYmVyIGFzCj4+ IHBhcmFtZXRlci4gSWYgcGlubmluZyBpcyBwb3NzaWJsZSAodGhlIGNhbGxpbmcgZG9tYWluIGhh cyB0aGUKPj4gcHJpdmlsZWdlIHRvIG1ha2UgdGhlIGNhbGwgYW5kIHRoZSBjcHUgaXMgYXZhaWxh YmxlIGluIHRoZSBkb21haW4ncwo+PiBjcHVwb29sKSB0aGUgY2FsbGluZyB2Y3B1IGlzIHBpbm5l ZCB0byB0aGUgc3BlY2lmaWVkIGNwdS4gVGhlIG9sZAo+PiBjcHUgYWZmaW5pdHkgaXMgc2F2ZWQu IFRvIHVuZG8gdGhlIHRlbXBvcmFyeSBwaW5uaW5nIGEgY3B1IC0xIGlzCj4+IHNwZWNpZmllZC4g VGhpcyB3aWxsIHJlc3RvcmUgdGhlIG9yaWdpbmFsIGNwdSBhZmZpbml0eSBmb3IgdGhlIHZjcHUu Cj4+Cj4+IFNpZ25lZC1vZmYtYnk6IEp1ZXJnZW4gR3Jvc3MgPGpncm9zc0BzdXNlLmNvbT4KPj4g LS0tCj4+IFYyOiAtIGxpbWl0IG9wZXJhdGlvbiB0byBoYXJkd2FyZSBkb21haW4gYXMgc3VnZ2Vz dGVkIGJ5IEphbiBCZXVsaWNoCj4+ICAgICAtIHNvbWUgc3R5bGUgaXNzdWVzIGNvcnJlY3RlZCBh cyByZXF1ZXN0ZWQgYnkgSmFuIEJldWxpY2gKPj4gICAgIC0gdXNlIGZpeGVkIHdpZHRoIHR5cGVz IGluIGludGVyZmFjZSBhcyByZXF1ZXN0ZWQgYnkgSmFuIEJldWxpY2gKPj4gICAgIC0gYWRkIGNv bXBhdCBsYXllciBjaGVja2luZyBhcyByZXF1ZXN0ZWQgYnkgSmFuIEJldWxpY2gKPj4gLS0tCj4+ ICB4ZW4vY29tbW9uL2NvbXBhdC9zY2hlZHVsZS5jIHwgIDQgKysKPj4gIHhlbi9jb21tb24vc2No ZWR1bGUuYyAgICAgICAgfCA5MiArKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysr KysrKy0tLQo+PiAgeGVuL2luY2x1ZGUvcHVibGljL3NjaGVkLmggICB8IDE3ICsrKysrKysrCj4+ ICB4ZW4vaW5jbHVkZS94bGF0LmxzdCAgICAgICAgIHwgIDEgKwo+PiAgNCBmaWxlcyBjaGFuZ2Vk LCAxMDkgaW5zZXJ0aW9ucygrKSwgNSBkZWxldGlvbnMoLSkKPj4KPj4gZGlmZiAtLWdpdCBhL3hl bi9jb21tb24vY29tcGF0L3NjaGVkdWxlLmMgYi94ZW4vY29tbW9uL2NvbXBhdC9zY2hlZHVsZS5j Cj4+IGluZGV4IDgxMmM1NTAuLjczYjBmMDEgMTAwNjQ0Cj4+IC0tLSBhL3hlbi9jb21tb24vY29t cGF0L3NjaGVkdWxlLmMKPj4gKysrIGIveGVuL2NvbW1vbi9jb21wYXQvc2NoZWR1bGUuYwo+PiBA QCAtMTAsNiArMTAsMTAgQEAKPj4gIAo+PiAgI2RlZmluZSBkb19zY2hlZF9vcCBjb21wYXRfc2No ZWRfb3AKPj4gIAo+PiArI2RlZmluZSB4ZW5fc2NoZWRfcGluX3RlbXAgc2NoZWRfcGluX3RlbXAK Pj4gK0NIRUNLX3NjaGVkX3Bpbl90ZW1wOwo+PiArI3VuZGVmIHhlbl9zY2hlZF9waW5fdGVtcAo+ PiArCj4+ICAjZGVmaW5lIHhlbl9zY2hlZF9zaHV0ZG93biBzY2hlZF9zaHV0ZG93bgo+PiAgQ0hF Q0tfc2NoZWRfc2h1dGRvd247Cj4+ICAjdW5kZWYgeGVuX3NjaGVkX3NodXRkb3duCj4+IGRpZmYg LS1naXQgYS94ZW4vY29tbW9uL3NjaGVkdWxlLmMgYi94ZW4vY29tbW9uL3NjaGVkdWxlLmMKPj4g aW5kZXggYjBkNGIxOC4uNjUzZjg1MiAxMDA2NDQKPj4gLS0tIGEveGVuL2NvbW1vbi9zY2hlZHVs ZS5jCj4+ICsrKyBiL3hlbi9jb21tb24vc2NoZWR1bGUuYwo+PiBAQCAtMjcxLDYgKzI3MSwxMiBA QCBpbnQgc2NoZWRfbW92ZV9kb21haW4oc3RydWN0IGRvbWFpbiAqZCwgc3RydWN0IGNwdXBvb2wg KmMpCj4+ICAgICAgc3RydWN0IHNjaGVkdWxlciAqb2xkX29wczsKPj4gICAgICB2b2lkICpvbGRf ZG9tZGF0YTsKPj4gIAo+PiArICAgIGZvcl9lYWNoX3ZjcHUgKCBkLCB2ICkKPj4gKyAgICB7Cj4+ ICsgICAgICAgIGlmICggdi0+YWZmaW5pdHlfYnJva2VuICkKPj4gKyAgICAgICAgICAgIHJldHVy biAtRUJVU1k7Cj4+ICsgICAgfQo+PiArCj4+ICAgICAgZG9tZGF0YSA9IFNDSEVEX09QKGMtPnNj aGVkLCBhbGxvY19kb21kYXRhLCBkKTsKPj4gICAgICBpZiAoIGRvbWRhdGEgPT0gTlVMTCApCj4+ ICAgICAgICAgIHJldHVybiAtRU5PTUVNOwo+PiBAQCAtNjY5LDYgKzY3NSwxNCBAQCBpbnQgY3B1 X2Rpc2FibGVfc2NoZWR1bGVyKHVuc2lnbmVkIGludCBjcHUpCj4+ICAgICAgICAgICAgICBpZiAo IGNwdW1hc2tfZW1wdHkoJm9ubGluZV9hZmZpbml0eSkgJiYKPj4gICAgICAgICAgICAgICAgICAg Y3B1bWFza190ZXN0X2NwdShjcHUsIHYtPmNwdV9oYXJkX2FmZmluaXR5KSApCj4+ICAgICAgICAg ICAgICB7Cj4+ICsgICAgICAgICAgICAgICAgaWYgKCB2LT5hZmZpbml0eV9icm9rZW4gKQo+PiAr ICAgICAgICAgICAgICAgIHsKPj4gKyAgICAgICAgICAgICAgICAgICAgLyogVGhlIHZjcHUgaXMg dGVtcG9yYXJpbHkgcGlubmVkLCBjYW4ndCBtb3ZlIGl0LiAqLwo+PiArICAgICAgICAgICAgICAg ICAgICB2Y3B1X3NjaGVkdWxlX3VubG9ja19pcnFyZXN0b3JlKGxvY2ssIGZsYWdzLCB2KTsKPj4g KyAgICAgICAgICAgICAgICAgICAgcmV0ID0gLUVCVVNZOwo+PiArICAgICAgICAgICAgICAgICAg ICBicmVhazsKPj4gKyAgICAgICAgICAgICAgICB9Cj4gCj4gRG9lcyB0aGlzIG1lYW4gdGhhdCBp ZiB0aGUgdXNlciBjbG9zZXMgdGhlIGxhcHRvcCBsaWQgd2hpbGUgb25lIG9mIHRoZXNlCj4gZHJp dmVycyBoYXMgdmNwdTAgcGlubmVkLCB0aGF0IFhlbiB3aWxsIGNyYXNoIChzZWUKPiB4ZW4vYXJj aC94ODYvc21wYm9vdC5jOl9fY3B1X2Rpc2FibGUoKSk/ICBPciBpcyBpdCB0aGUgT1MncyBqb2Ig dG8gbWFrZQo+IHN1cmUgdGhhdCBhbGwgdGVtcG9yYXJ5IHBpbnMgYXJlIHJlbW92ZWQgYmVmb3Jl IHN1c3BlbmRpbmc/CgpZZXMsIHRoaXMgbXVzdCBiZSBlbnN1cmVkIGJ5IHRoZSBPUy4KCj4gQWxz byAtLSBoYXZlIHlvdSBhY3R1YWxseSB0ZXN0ZWQgdGhlICJjcHVwb29sIG1vdmUgd2hpbGUgcGlu bmVkIgo+IGZ1bmN0aW9uYWxpdHkgdG8gbWFrZSBzdXJlIGl0IGFjdHVhbGx5IHdvcmtzPyAgVGhl cmUncyBhIHdlaXJkIGJpdCBpbgo+IGNwdXBvb2xfdW5hc3NpZ25fY3B1X2hlbHBlcigpIHdoZXJl IGFmdGVyIGNhbGxpbmcKPiBjcHVfZGlzYWJsZV9zY2hlZHVsZXIoY3B1KSwgaXQgdW5jb25kaXRp b25hbGx5IHNldHMgdGhlIGNwdSBiaXQgaW4gdGhlCj4gY3B1cG9vbF9mcmVlX2NwdXMgbWFzaywg ZXZlbiBpZiBpdCByZXR1cm5zIGFuIGVycm9yLiAgVGhhdCBjYW4ndCBiZQo+IHJpZ2h0LCBldmVu IGZvciB0aGUgZXhpc3RpbmcgLUVBR0FJTiBjYXNlLCBjYW4gaXQ/CgpUaGF0IHNob3VsZCBiZSBu byBwcm9ibGVtLiBTdWNoIGEgZmFpbHVyZSBjYW4gYmUgcmVwYWlyZWQgZWFzaWx5IGJ5CmFkZGlu ZyB0aGUgY3B1IHRvIHRoZSBjcHVwb29sIGFnYWluLiBBZGRpbmcgYSBjb21tZW50IHNlZW1zIHRv IGJlIGEKZ29vZCBpZGVhLiA6LSkKCldoYXQgaXMgd3JvbmcgYW5kIGV2ZW4gd29yc2UsIHNjaGVk dWxlX2NwdV9zd2l0Y2goKSByZXR1cm5pbmcgYW4gZXJyb3IKd2lsbCBsZWFrIGRvbWxpc3RfcmVh ZF9sb2NrLiBJJ2xsIHdyaXRlIGFub3RoZXIgcGF0Y2ggdG8gY29ycmVjdCB0aGlzCmlzc3VlLgoK PiBJIHNlZSB0aGF0IHlvdSBoYXZlIGEgbG9vcCB0byByZXRyeSB0aGlzIGNhbGwgc2V2ZXJhbCB0 aW1lcyBpbiB0aGUgbmV4dAo+IHBhdGNoOyBidXQgd2hhdCBpZiBpdCBmYWlscyBldmVyeSB0aW1l IC0tIHdoYXQgc3RhdGUgaXMgdGhlIHN5c3RlbSBpbj8KClRoZSBjcHUgY2FuIGJlIGFkZGVkIHRv IHRoZSBvcmlnaW5hbCBjcHVwb29sIHZpYSAieGwgY3B1cG9vbC1hZGQiIGFnYWluLgoKPiBBbmQs IGluIGdlbmVyYWwsIHdoYXQgaGFwcGVucyBpZiB0aGUgZGV2aWNlIGRyaXZlciBnZXRzIG1peGVk IHVwIGFuZAo+IGZvcmdldHMgdG8gdW5waW4gdGhlIHZjcHU/ICBJcyB0aGUgb25seSByZWNvdXJz ZSB0byByZWJvb3QgeW91ciBob3N0IChvcgo+IGRlYWwgd2l0aCB0aGUgZmFjdCB0aGF0IHlvdSBj YW4ndCByZWNvbmZpZ3VyZSB5b3VyIGNwdXBvb2xzKT8KClVubGVzcyB3ZSBhZGQgYSAiZm9yY2Vk IiBvcHRpb24gdG8gInhsIHZjcHUtcGluIiwgeWVzLgoKVGhhbmtzIGZvciB0aGUgdGhvcm91Z2gg cmV2aWV3LAoKSnVlcmdlbgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwpo dHRwOi8vbGlzdHMueGVuLm9yZy94ZW4tZGV2ZWwK