From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: Re: [PATCH] x86/cpuid: fix dom0 crash on skylake machine Date: Wed, 1 Jun 2016 12:45:54 +0100 Message-ID: <574ECAF2.4000502@citrix.com> References: <1464757092-13177-1-git-send-email-luwei.kang@intel.com> <574EA4F0.5030607@citrix.com> <574EC46202000078000F047F@prv-mh.provo.novell.com> <574EAC38.6020305@citrix.com> <574ECA5E02000078000F04C6@prv-mh.provo.novell.com> <574EC6A1.9090307@citrix.com> <574EE53C02000078000F0609@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: <574EE53C02000078000F0609@prv-mh.provo.novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Jan Beulich Cc: huaitong.han@intel.com, Luwei Kang , yong.y.wang@intel.com, xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org T24gMDEvMDYvMTYgMTI6MzgsIEphbiBCZXVsaWNoIHdyb3RlOgo+Pj4+IE9uIDAxLjA2LjE2IGF0 IDEzOjI3LCA8YW5kcmV3LmNvb3BlcjNAY2l0cml4LmNvbT4gd3JvdGU6Cj4+IE9uIDAxLzA2LzE2 IDEwOjQzLCBKYW4gQmV1bGljaCB3cm90ZToKPj4+Pj4+IE9uIDAxLjA2LjE2IGF0IDExOjM0LCA8 YW5kcmV3LmNvb3BlcjNAY2l0cml4LmNvbT4gd3JvdGU6Cj4+Pj4gT24gMDEvMDYvMTYgMTA6MTcs IEphbiBCZXVsaWNoIHdyb3RlOgo+Pj4+Pj4+PiBPbiAwMS4wNi4xNiBhdCAxMTowMywgPGFuZHJl dy5jb29wZXIzQGNpdHJpeC5jb20+IHdyb3RlOgo+Pj4+Pj4gV2hpbGUgdGhpcyBkb2VzIHdvcmss IGl0IHVuZG9lcyBzb21lIG9mIHRoZSB3b3JrIEkgc3RhcnRlZCB3aXRoIG15IGNwdWlkCj4+Pj4+ PiBpbXByb3ZlbWVudHMgaW4gNC43Cj4+Pj4+Pgo+Pj4+Pj4gRG9lcyB0aGUgYXR0YWNoZWQgcGF0 Y2ggYWxzbyByZXNvbHZlIHlvdXIgaXNzdWU/Cj4+Pj4+IFdoaWxlIHRoYXQncyBtdWNoIGJldHRl ciB0aGFuIHRoZSBvcmlnaW5hbCwgSSBkb24ndCB0aGluayBpdCdzIHF1aXRlCj4+Pj4+IGVub3Vn aC4gVGhlIHJlc3Qgb2YgdGhlIGRvbWFpbiBwb2xpY3kgc2hvdWxkIGJlIHRha2VuIGludG8gYWNj b3VudAo+Pj4+PiAoYW5kIEkgdGhpbmsgSSBoYWQgc3VnZ2VzdGVkIHRvIGRvIHNvIGR1cmluZyBy ZXZpZXcgb2YgeW91ciBDUFVJRAo+Pj4+PiByZXdvcmsgc2VyaWVzKSwgaS5lLiB0aGlzIGNhbid0 IGJlIGNhbGN1bGF0ZWQgb25jZSBmb3IgZXZlcnkgZG9tYWluLgo+Pj4+IExpa2UgdGhlIGN1cnJl bnQgdXNlIG9mIHtodm0scHZ9X2ZlYXR1cmVzZXQsIGFzIGFuIHVwcGVyIGJvdW5kLCB0aGlzIGlz Cj4+Pj4ganVzdCBhIHN0b3BnYXAgZml4Lgo+Pj4+Cj4+Pj4gRml4aW5nIHRoaXMgaW4gYSBwcm9w ZXJseSBwZXItZG9tYWluIHdheSBpcyBwYXJ0IG9mIG15IGZ1cnRoZXIgcGxhbnMgZm9yCj4+Pj4g Y3B1aWQgaW1wcm92ZW1lbnRzLiAgVGhlIHJlYXNvbiBpdCBpc24ndCBkb25lIGxpa2UgdGhpcyB5 ZXQgaXMgYmVjYXVzZQo+Pj4+IHRoZXJlIGlzIGEgc3Vic3RhbnRpYWwgcXVhbnRpdHkgb2Ygd29y ayByZXF1aXJlZCB0byBtYWtlIHRoaXMgZnVuY3Rpb24uCj4+PiBXaGF0IHN1YnN0YW50aWFsIHdv cmsgb3RoZXIgdGhhbiBYU1RBVEUgbGVhZiBoYW5kbGluZyBpbnF1aXJpbmcKPj4+IG90aGVyIGxl YXZlcyBkbyB5b3Ugc2VlPwo+PiBJIHdhbnQgdG8gYWRqdXN0IHRoZSByZXByZXNlbnRhdGlvbiBv ZiBjcHVpZCBpbmZvcm1hdGlvbiBpbiBzdHJ1Y3QKPj4gZG9tYWluLiBUaGUgY3VycmVudCBsb29w IGluIGRvbWFpbl9jcHVpZCgpIGNhdXNlcyBhbiBPKE4pIG92ZXJoZWFkIGZvcgo+PiBldmVyeSBx dWVyeSwgd2hpY2ggaXMgdmVyeSBwb29yIGZvciBhY3Rpb25zIHdoaWNoIHJlYWxseSBzaG91bGQg YmUgYQo+PiBzaW5nbGUgYml0IHRlc3QgYXQgYSBmaXhlZCBvZmZzZXQuCj4+Cj4+IFRoaXMgbmVl ZHMgdG8gYmUgY29tYmluZWQgd2l0aCBwcm9wZXJseSBzcGxpdHRpbmcgdGhlIHBlci1kb21haW4g YW5kCj4+IHBlci12Y3B1IGluZm9ybWF0aW9uLCB3aGljaCByZXF1aXJlcyBrbm93aW5nIHRoZSBl eHBlY3RlZCB2Y3B1IHRvcG9sb2d5Cj4+IGR1cmluZyBkb21haW4gY3JlYXRpb24uCj4+Cj4+IE9u IHRvcCBvZiB0aGF0LCB0aGVyZSBuZWVkcyB0byBiZSB2ZXJpZmljYXRpb24gbG9naWMgdG8gY2hl Y2sgdGhlCj4+IGNvcnJlY3RuZXNzIG9mIGluZm9ybWF0aW9uIHBhc3NlZCBmcm9tIHRoZSB0b29s c3RhY2suCj4+Cj4+IEFsbCBvZiB0aGVzZSBhcmVhcyBhcmUgY292ZXJlZCBpbiB0aGUgImtub3du IGlzc3VlcyIgc2VjdGlvbiBvZiB0aGUKPj4gZmVhdHVyZSBkb2MsIGFuZCBJIGRvIHBsYW4gdG8g Zml4IHRoZW0gYWxsLiAgSG93ZXZlciwgaXQgaXNuJ3QgYSBjb3VwbGUKPj4gb2YgaG91cnMgd29y dGggb2Ygd29yay4KPiBBbGwgdW5kZXJzdG9vZCwgeWV0IG5vdCB0byB0aGUgcG9pbnQ6IFRoZSBv cmlnaW5hbCByZW1hcmsgd2FzIHRoYXQKPiB0aGUgdmVyeSBYU1RBVEUgaGFuZGxpbmcgY291bGQg YmUgZG9uZSBiZXR0ZXIgd2l0aCBmYXIgbm90IGFzIG11Y2gKPiBvZiBhIGNoYW5nZSwgYXQgbGVh c3QgYWZhaWN0IHdpdGhvdXQgaGF2aW5nIHRyaWVkLgoKSW4gd2hpY2ggY2FzZSBJIGRvbid0IGtu b3cgd2hhdCB5b3Ugd2VyZSBzdWdnZXN0aW5nLgoKPgo+Pj4+PiBBbmQgdGhlbiwgYXMgc2FpZCBp biByZXBseSB0byB0aGUgb3JpZ2luYWwgcGF0Y2gsIGhhbmRsZV94c2V0YnYoKSdzCj4+Pj4+IGNo ZWNraW5nIHNob3VsZCBiZSBnZW5lcmFsaXplZCBmcm9tIHRoZSBzcGVjaWFsIGNhc2luZyBvZiBQ S1JVIChvcgo+Pj4+PiBpZiB3ZSBkb24ndCB3YW50IHRoYXQsIHRoZW4gdGhhdCBzcGVjaWFsIGNh c2Ugd291bGQgYmV0dGVyIGdldAo+Pj4+PiByZW1vdmVkIGZvciBjb25zaXN0ZW5jeSByZWFzb25z KS4KPj4+PiBPaCAtIEkgaGFkbid0IGV2ZW4gbm90aWNlZCB0aGF0LiAgSG93IGFib3V0IHRoaXMg aW5jcmVtZW50YWwgY2hhbmdlPwo+Pj4+Cj4+Pj4gZGlmZiAtLWdpdCBhL3hlbi9hcmNoL3g4Ni94 c3RhdGUuYyBiL3hlbi9hcmNoL3g4Ni94c3RhdGUuYwo+Pj4+IGluZGV4IGEwY2ZjYzIuLjY3YzBl NGIgMTAwNjQ0Cj4+Pj4gLS0tIGEveGVuL2FyY2gveDg2L3hzdGF0ZS5jCj4+Pj4gKysrIGIveGVu L2FyY2gveDg2L3hzdGF0ZS5jCj4+Pj4gQEAgLTY1OCw4ICs2NTgsOCBAQCBpbnQgaGFuZGxlX3hz ZXRidih1MzIgaW5kZXgsIHU2NCBuZXdfYnYpCj4+Pj4gICAgICBpZiAoIChuZXdfYnYgJiB+eGZl YXR1cmVfbWFzaykgfHwgIXZhbGlkX3hjcjAobmV3X2J2KSApCj4+Pj4gICAgICAgICAgcmV0dXJu IC1FSU5WQUw7Cj4+Pj4gIAo+Pj4+IC0gICAgLyogWENSMC5QS1JVIGlzIGRpc2FibGVkIG9uIFBW IG1vZGUuICovCj4+Pj4gLSAgICBpZiAoIGlzX3B2X3ZjcHUoY3VycikgJiYgKG5ld19idiAmIFhT VEFURV9QS1JVKSApCj4+Pj4gKyAgICAvKiBTYW5pdHkgY2hlY2sgYWdhaW5zdCBkb21haW4gbWF4 aW11bS4gKi8KPj4+PiArICAgIGlmICggbmV3X2J2ICYgfihpc19wdl92Y3B1KGN1cnIpID8gcHZf eGZlYXR1cmVfbWFzayA6IGh2bV94ZmVhdHVyZV9tYXNrKSApCj4+Pj4gICAgICAgICAgcmV0dXJu IC1FT1BOT1RTVVBQOwo+Pj4gTG9va3MgZ29vZC4KPj4+Cj4+PiBCdXQgb25lIG90aGVyIGFzcGVj dDogTVBYIGlzIHRhZ2dlZCBTLCB3aGlsZSBQS1UgaXMgdGFnZ2VkIEguIERvCj4+PiB3ZSBwZXJo YXBzIG5lZWQgdGhyZWUgbWFza3MgdG8gZ2V0IHRoZSBhYm92ZSByaWdodCBhdCBsZWFzdCB3aXRo Cj4+PiBqdXN0IHRoZSBnbG9iYWwgbWFza2luZz8KPj4gU28gaXQgaXMuICBJIHdvbmRlciB3aHku ICAoSXQgd2FzIHByZXZpb3VzbHkgbGlrZSB0aGF0LCBhbmQgSSBkaWRuJ3QKPj4gYWx0ZXIgaXQg YXMgcGFydCBvZiBteSBjcHVpZCB3b3JrKS4gIEkgY2FuJ3Qgc2VlIGFueXRoaW5nIGluIE1QWCB3 aGljaAo+PiBtYWtlcyBpdCB1bnNhZmUgdG8gdXNlIHdpdGggc2hhZG93LiAgQWxsIGNvbnRyb2wg c3RhdGUgd29ya3Mgb24gbGluZWFyCj4+IGFkZHJlc3NlcyByYXRoZXIgdGhhbiBwaHlzaWNhbCBh ZGRyZXNzZXMuCj4gV2VsbCwgaXQncyBNUFggdGhhdCdzIHRhZ2dlZCBhcyBhdmFpbGFibGUgZm9y IHNoYWRvdyBndWVzdHMsIGFuZAo+IFBLVSBhcyB1bmF2YWlsYWJsZS4KCkFoIHllcyAtIG15IGNv bmZ1c2lvbi4gIFdlIHNob3VsZCBkeW5hbWljYWxseSBoaWRlIFBLVSBub3QgTVBYLgoKPgo+PiBG b3Igbm93LCBJIHdpbGwgaW1wbGVtZW50IHRoZSBzYW1lIGtpbmQgb2YgcnVudGltZSBjaGVjayBh cyBoaWRlcyBNUFgKPj4gZnJvbSBzaGFkb3cgZ3Vlc3RzIGluIGh2bV9jcHVpZCgpLiAgVGhpcyBh Z2FpbiB3aWxsIGV2ZW50dWFsbHkgYmUKPj4gc3Vic3VtZWQgYnkgdGhlIGZ1cnRoZXIgd29yay4K Pj4KPj4gSSBhbSBhbHNvIHdvbmRlcmluZyB3aGV0aGVyIHdlIHNob3VsZCBkaXNhYmxlIE1QWCBi eSBkZWZhdWx0IGZvcgo+PiBkb21haW5zLiAgV2Uga25vdyBpdCB3b24ndCB3b3JrIHByb3Blcmx5 IGZvciBhbnl0aGluZyB3aGljaCBlbmRzIHVwCj4+IGJlaW5nIGVtdWxhdGVkLiAgVXNlcnMgd2hv IHNwZWNpZmljYWxseSB3YW50IHRvIHRyeSBpdCBzaG91bGQgYmUgYWJsZSB0bwo+PiB0dXJuIGl0 IG9uIGluIHRoZWlyIGRvbWFpbiBjb25maWd1cmF0aW9uIGZpbGUsIGJ1dCBpdCByZWFsbHkgc2hv dWxkbid0Cj4+IGJlIG9uIG15IGRlZmF1bHQuCj4gRm9yIGd1ZXN0cyBiZWluZyBpbnRyb3NwZWN0 ZWQgSSBhZ3JlZS4gRm9yIG90aGVycyBJJ20gbm90IHN1cmUsIGFzCj4gbm9ybWFsbHkgd2Ugc2hv dWxkbid0IGhpdCB0aGUgaW5zdHJ1Y3Rpb24gZW11bGF0b3IgZm9yIGJyYW5jaGVzICh0aGUKPiBt YWluIGV4Y2VwdGlvbiBiZWluZyBQQUUgbW9kZSBzaGFkb3cgZ3Vlc3RzKS4KCk1QWCBjYW4gYmUg dXNlZCBmb3IgYW55IG1lbW9yeSByZWZlcmVuY2UsIGFuZCBvbmUgc3RhdGVkIHB1cnBvc2UgaXMg Zm9yCmJ1ZmZlciBvdmVyZmxvdyBkZXRlY3Rpb24uICBXaGlsZSB0aGUgaW5zdHJ1Y3Rpb24gZW11 bGF0b3IgZG9lc24ndAp1bmRlcnN0YW5kIE1QWCwgYW55IE1NSU8gb3Igc2hhZG93IHBhZ2V0YWJs ZSB1cGRhdGVzIGFyZSBsaWFibGUgdG8gYmUKaW5jb3JyZWN0LgoKfkFuZHJldwoKX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcg bGlzdApYZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwpodHRwOi8vbGlzdHMueGVuLm9yZy94ZW4tZGV2 ZWwK