From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andy Lutomirski Subject: Re: [PATCH v4 2/5] x86/msr: Carry on after a non-"safe" MSR access fails without !panic_on_oops Date: Mon, 14 Mar 2016 10:17:07 -0700 Message-ID: References: <20160314120202.GD15800@pd.tnic> 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: Linus Torvalds Cc: KVM list , Peter Zijlstra , X86 ML , "linux-kernel@vger.kernel.org" , xen-devel , Borislav Petkov , Andy Lutomirski , Paolo Bonzini , Andrew Morton , Arjan van de Ven List-Id: xen-devel@lists.xenproject.org T24gTW9uLCBNYXIgMTQsIDIwMTYgYXQgMTA6MTEgQU0sIExpbnVzIFRvcnZhbGRzCjx0b3J2YWxk c0BsaW51eC1mb3VuZGF0aW9uLm9yZz4gd3JvdGU6Cj4KPiBPbiBNYXIgMTQsIDIwMTYgMTA6MDUg QU0sICJBbmR5IEx1dG9taXJza2kiIDxsdXRvQGFtYWNhcGl0YWwubmV0PiB3cm90ZToKPj4KPj4g V2UgY291bGQgcHJvYmFibHkgcmVtb3ZlIHRoYXQgY2hlY2sgYW5kIGxldCBjdXN0b20gZml4dXBz IHJ1biBlYXJseS4KPj4gSSBkb24ndCBzZWUgYW55IGNvbXBlbGxpbmcgcmVhc29uIHRvIGtlZXAg dGhlbSBkaXNhYmxlZC4gIFRoYXQgc2hvdWxkCj4+IHByb2JhYmx5IGJlIGEgc2VwYXJhdGUgY2hh bmdlLCB0aG91Z2guCj4KPiBPciB3ZSBjb3VsZCBqdXN0IHVzZSB0aGUgZXhpc3Rpbmcgd3Jtc3Jf c2FmZSgpIGNvZGUgYW5kIG5vdCBhZGQgdGhpcyBuZXcKPiBzcGVjaWFsIGNvZGUgYXQgYWxsLgo+ Cj4gTG9vaywgd2h5IGFyZSB5b3UgZG9pbmcgdGhpcz8gV2Ugc2hvdWxkIGdldCByaWQgb2YgdGhl IGRpZmZlcmVuY2UgYmV0d2Vlbgo+IHdybXNyIGFuZCB3cm1zcl9zYWZlKCksIG5vdCBtYWtlIGl0 IGJpZ2dlci4KPgo+IEp1c3QgbWFrZSBldmVyeXRoaW5nIHNhZmUuIFRoZXJlIGhhcyBuZXZlciBp biB0aGUgaGlzdG9yeSBvZiBhbnl0aGluZyBiZWVuCj4gYW4gYWR2YW50YWdlIHRvIG1ha2luZyB0 aGluZ3Mgb29wcyBhbmQgdG8gbWFraW5nIHRoaW5ncyBtb3JlIGNvbXBsaWNhdGVkLgo+Cj4gV2h5 IGlzIHJkL3dybXNyKCkgc28gbWFnaWNhbGx5IGltcG9ydGFudD8KCkJlY2F1c2Ugbm9uZSBvZiB0 aGlzIGlzIGFjdHVhbGx5IHNhZmUgdW5sZXNzIHRoZSBjb2RlIHRoYXQgY2FsbHMKd2hhdGV2ZXJf c2FmZSBhY3R1YWxseSBkb2VzIHNvbWV0aGluZyBpbnRlbGxpZ2VudCB3aXRoIHRoZSByZXR1cm4K dmFsdWUuICBJIHRoaW5rIHRoYXQgbW9zdCBjb2RlIHRoYXQgZG9lcyByZG1zciBvciB3cm1zciBh Y3R1YWxseQp0aGlua3MgIkkga25vdyB0aGF0IHRoaXMgTVNSIGV4aXN0cyBhbmQgSSB3YW50IHRv IGFjY2VzcyBpdCIgYW5kIHRoZQpjb2RlIG1heSBhY3R1YWxseSBtYWxmdW5jdGlvbiBpZiB0aGUg YWNjZXNzIGZhaWxzLiAgU28gSSB0aGluayB3ZQpyZWFsbHkgZG8gd2FudCB0aGUgd2FybmluZyBz byB3ZSBjYW4gZml4IHRoZSBidWdzIGlmIHRoZXkgaGFwcGVuLiAgQW5kCkkgd291bGRuJ3QgYmUg YXQgYWxsIHN1cnByaXNlZCBpZiB0aGVyZSdzIGEgYnVnIG9yIHR3byBpbiBwZXJmIHdoZXJlCnNv bWUgcGVyZiBldmVudCByZWdpc3RlcnMgaXRzZWxmIGluY29ycmVjdGx5IGluIHNvbWUgY2FzZXMg YmVjYXVzZSBpdAptZXNzZWQgdXAgdGhlIHByb2JlIHNlcXVlbmNlLiAgV2UgZG9uJ3Qgd2FudCB0 byB0b3RhbGx5IGlnbm9yZSB0aGUKcmVzdWx0aW5nIGZhaWx1cmUgb2YgdGhlIHBlcmYgZXZlbnQg LS0gd2Ugd2FudCB0byBnZXQgYSB3YXJuaW5nIHNvCnRoYXQgd2Uga25vdyBhYm91dCB0aGUgYnVn LgoKT3Igc3VwcG9zZSB3ZSdyZSB3cml0aW5nIHNvbWUgaW1wb3J0YW50IGJ1dCBlYXN5LXRvLW1p c3MgTVNSLCBsaWtlIFBBVApvciBvbmUgb2YgdGhlIGV4Y2Vzc2l2ZSBudW1iZXIgb2Ygc3lzdGVt IGNhbGwgc2V0dXAgTVNScy4gIElmIHRoZQp3cml0ZSBmYWlscywgdGhlIHN5c3RlbSBjb3VsZCBl YXNpbHkgc3RpbGwgYXBwZWFyIHRvIHdvcmsgdW50aWwKc29tZXRoaW5nIHVuZm9ydHVuYXRlIGhh cHBlbnMuCgpTbyB5ZXMsIGxldCdzIHBsZWFzZSB3YXJuLiAgSSdtIG9rYXkgd2l0aCByZW1vdmlu ZyB0aGUgcGFuaWNfb25fb29wcwp0aGluZyB0aG91Z2guICAoQnV0IGlmIGFueW9uZSBzdWdnZXN0 cyB0aGF0IHdlIHNob3VsZCBzdG9wIE9PUFNpbmcgb24KYmFkIGtlcm5lbCBwYWdlIGZhdWx0cywg SSAqd2lsbCogZmlnaHQgYmFjay4pCgotLUFuZHkKCl9fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVsQGxp c3RzLnhlbi5vcmcKaHR0cDovL2xpc3RzLnhlbi5vcmcveGVuLWRldmVsCg==