From mboxrd@z Thu Jan 1 00:00:00 1970 From: Linus Torvalds 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 11:04:59 -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: Andy Lutomirski 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 T24gTW9uLCBNYXIgMTQsIDIwMTYgYXQgMTA6MTcgQU0sIEFuZHkgTHV0b21pcnNraSA8bHV0b0Bh bWFjYXBpdGFsLm5ldD4gd3JvdGU6Cj4KPiBTbyB5ZXMsIGxldCdzIHBsZWFzZSB3YXJuLiAgSSdt IG9rYXkgd2l0aCByZW1vdmluZyB0aGUgcGFuaWNfb25fb29wcwo+IHRoaW5nIHRob3VnaC4gIChC dXQgaWYgYW55b25lIHN1Z2dlc3RzIHRoYXQgd2Ugc2hvdWxkIHN0b3AgT09QU2luZyBvbgo+IGJh ZCBrZXJuZWwgcGFnZSBmYXVsdHMsIEkgKndpbGwqIGZpZ2h0IGJhY2suKQoKQmFkIGtlcm5lbCBw YWdlIGZhdWx0cyBhcmUgc29tZXRoaW5nIGNvbXBsZXRlbHkgZGlmZmVyZW50LiBUaGV5IHdvdWxk CmJlIGFjdHVhbCBidWdzIHJlZ2FyZGxlc3MuCgpUaGUgTVNSIHRoaW5nIGhhcyAqb2Z0ZW4qIGJl ZW4ganVzdCBzaWxseSAidGhpcyBDUFUgZG9lc24ndCBkbyB0aGF0Ck1TUiIuIEdlbmVyaWMgYm9v dHVwIHNldHVwIGNvZGUgZXRjIHRoYXQganVzdCBkaWRuJ3Qga25vdyBvciBjYXJlCmFib3V0IHRo ZSBwYXJ0aWN1bGFyIGJhZGx5IGRvY3VtZW50ZWQgcnVsZSBmb3Igb25lIHBhcnRpY3VsYXIgcmFu ZG9tCkNQVSB2ZXJzaW9uIGFuZCBzdGVwcGluZy4KCkluIGZhY3QsIHdoZW4gSSBzYXkgIm9mdGVu IiwgSSBzdXNwZWN0IEkgc2hvdWxkIHJlYWxseSBqdXN0IHNheQoiYWx3YXlzIi4gSSBkb24ndCB0 aGluayB3ZSd2ZSBldmVyIGZvdW5kIGEgY2FzZSB3aGVyZSBvb3BzaW5nIHdvdWxkCmhhdmUgYmVl biB0aGUgcmlnaHQgdGhpbmcuIEJ1dCBpdCBoYXMgZGVmaW5pdGVseSBjYXVzZWQgbG90cyBvZgpw cm9ibGVtcywgZXNwZWNpYWxseSBpbiB0aGUgZWFybHkgcGF0aHMgd2hlcmUgeW91ciBjb2RlIGRv ZXNuJ3QgZXZlbgp3b3JrIHJpZ2h0IG5vdy4KCk5vdywgd2hlbiBpdCBjb21lcyB0byB0aGUgd2Fy bmluZywgSSBndWVzcyBJIGNvdWxkIGxpdmUgd2l0aCBpdCwgYnV0IEkKdGhpbmsgaXQncyBzdHVw aWQgdG8gbWFrZSB0aGlzIGEgbG93LWxldmVsIGV4Y2VwdGlvbiBoYW5kbGVyIHRoaW5nLgoKU28g d2hhdCBJIHRoaW5rIHNob3VsZCBiZSBkb25lOgoKIC0gbWFrZSBzdXJlIHRoYXQgd3IvcmRtc3Jf c2FmZSgpIGFjdHVhbGx5IHdvcmtzIGR1cmluZyB2ZXJ5IGVhcmx5CmluaXQuIEF0IHNvbWUgcG9p bnQgaXQgZGlkbid0LgoKIC0gZ2V0IHJpZCBvZiB0aGUgY3VycmVudCB3cm1zci9yZG1zciAqZW50 aXJlbHkqLiBJdCdzIHNoaXQuCgogLSBBZGQgdGhpcyB3cmFwcGVyOgoKICAgICAgI2RlZmluZSB3 cm1zcihtc3IsIGxvdywgaGlnaCkgXAogICAgICAgIFdBUk5fT05fT05DRSh3cm1zcl9zYWZlKG1z ciwgbG93LCBoaWdoKSkKCmFuZCBiZSBkb25lIHdpdGggaXQuIFdlIGNvdWxkIGV2ZW4gZGVjaWRl IHRvIG1ha2UgdGhhdCBXQVJOX09OX09OQ0UoKQpiZSBzb21ldGhpbmcgd2UgY291bGQgY29uZmln dXJlIG91dCwgYmVjYXVzZSBpdCdzIHJlYWxseSBhIGRlYnVnZ2luZwp0aGluZyBhbmQgaXNuJ3Qg bGlrZSBpdCBzaG91bGQgYmUgYWxsIHRoYXQgZmF0YWwuCgpOb25lIG9mIHRoaXMgaW5zYW5lIGNv bXBsaWNhdGVkIGNyYXAgdGhhdCBidXlzIHVzIGV4YWN0bHkgKm5vdGhpbmcqLAphbmQgZGVwZW5k cyBvbiBmYW5jeSBuZXcgZXhjZXB0aW9uIGhhbmRsaW5nIHN1cHBvcnQgZXRjIGV0Yy4KClNvIHdo YXQncyB0aGUgZG93bnNpZGUgdG8ganVzdCBkb2luZyB0aGlzIHNpbXBsZSB0aGluZz8KCiAgICAg ICAgICAgICAgICAgICAgICBMaW51cwoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVu Lm9yZwpodHRwOi8vbGlzdHMueGVuLm9yZy94ZW4tZGV2ZWwK