From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ingo Molnar Subject: Re: [PATCH v4 2/5] x86/msr: Carry on after a non-"safe" MSR access fails without !panic_on_oops Date: Tue, 15 Mar 2016 11:21:42 +0100 Message-ID: <20160315102142.GA23406__40691.5248408497$1458037418$gmane$org@gmail.com> References: <20160314120202.GD15800@pd.tnic> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline 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 , Andy Lutomirski , Arjan van de Ven List-Id: xen-devel@lists.xenproject.org CiogTGludXMgVG9ydmFsZHMgPHRvcnZhbGRzQGxpbnV4LWZvdW5kYXRpb24ub3JnPiB3cm90ZToK Cj4gT24gTW9uLCBNYXIgMTQsIDIwMTYgYXQgMTA6MTcgQU0sIEFuZHkgTHV0b21pcnNraSA8bHV0 b0BhbWFjYXBpdGFsLm5ldD4gd3JvdGU6Cj4gPgo+ID4gU28geWVzLCBsZXQncyBwbGVhc2Ugd2Fy bi4gIEknbSBva2F5IHdpdGggcmVtb3ZpbmcgdGhlIHBhbmljX29uX29vcHMKPiA+IHRoaW5nIHRo b3VnaC4gIChCdXQgaWYgYW55b25lIHN1Z2dlc3RzIHRoYXQgd2Ugc2hvdWxkIHN0b3AgT09QU2lu ZyBvbgo+ID4gYmFkIGtlcm5lbCBwYWdlIGZhdWx0cywgSSAqd2lsbCogZmlnaHQgYmFjay4pCj4g Cj4gQmFkIGtlcm5lbCBwYWdlIGZhdWx0cyBhcmUgc29tZXRoaW5nIGNvbXBsZXRlbHkgZGlmZmVy ZW50LiBUaGV5IHdvdWxkCj4gYmUgYWN0dWFsIGJ1Z3MgcmVnYXJkbGVzcy4KPiAKPiBUaGUgTVNS IHRoaW5nIGhhcyAqb2Z0ZW4qIGJlZW4ganVzdCBzaWxseSAidGhpcyBDUFUgZG9lc24ndCBkbyB0 aGF0Cj4gTVNSIi4gR2VuZXJpYyBib290dXAgc2V0dXAgY29kZSBldGMgdGhhdCBqdXN0IGRpZG4n dCBrbm93IG9yIGNhcmUKPiBhYm91dCB0aGUgcGFydGljdWxhciBiYWRseSBkb2N1bWVudGVkIHJ1 bGUgZm9yIG9uZSBwYXJ0aWN1bGFyIHJhbmRvbQo+IENQVSB2ZXJzaW9uIGFuZCBzdGVwcGluZy4K PiAKPiBJbiBmYWN0LCB3aGVuIEkgc2F5ICJvZnRlbiIsIEkgc3VzcGVjdCBJIHNob3VsZCByZWFs bHkganVzdCBzYXkKPiAiYWx3YXlzIi4gSSBkb24ndCB0aGluayB3ZSd2ZSBldmVyIGZvdW5kIGEg Y2FzZSB3aGVyZSBvb3BzaW5nIHdvdWxkCj4gaGF2ZSBiZWVuIHRoZSByaWdodCB0aGluZy4gQnV0 IGl0IGhhcyBkZWZpbml0ZWx5IGNhdXNlZCBsb3RzIG9mCj4gcHJvYmxlbXMsIGVzcGVjaWFsbHkg aW4gdGhlIGVhcmx5IHBhdGhzIHdoZXJlIHlvdXIgY29kZSBkb2Vzbid0IGV2ZW4KPiB3b3JrIHJp Z2h0IG5vdy4KPiAKPiBOb3csIHdoZW4gaXQgY29tZXMgdG8gdGhlIHdhcm5pbmcsIEkgZ3Vlc3Mg SSBjb3VsZCBsaXZlIHdpdGggaXQsIGJ1dCBJCj4gdGhpbmsgaXQncyBzdHVwaWQgdG8gbWFrZSB0 aGlzIGEgbG93LWxldmVsIGV4Y2VwdGlvbiBoYW5kbGVyIHRoaW5nLgo+IAo+IFNvIHdoYXQgSSB0 aGluayBzaG91bGQgYmUgZG9uZToKPiAKPiAgLSBtYWtlIHN1cmUgdGhhdCB3ci9yZG1zcl9zYWZl KCkgYWN0dWFsbHkgd29ya3MgZHVyaW5nIHZlcnkgZWFybHkKPiBpbml0LiBBdCBzb21lIHBvaW50 IGl0IGRpZG4ndC4KPiAKPiAgLSBnZXQgcmlkIG9mIHRoZSBjdXJyZW50IHdybXNyL3JkbXNyICpl bnRpcmVseSouIEl0J3Mgc2hpdC4KPiAKPiAgLSBBZGQgdGhpcyB3cmFwcGVyOgo+IAo+ICAgICAg ICNkZWZpbmUgd3Jtc3IobXNyLCBsb3csIGhpZ2gpIFwKPiAgICAgICAgIFdBUk5fT05fT05DRSh3 cm1zcl9zYWZlKG1zciwgbG93LCBoaWdoKSkKPiAKPiBhbmQgYmUgZG9uZSB3aXRoIGl0LiBXZSBj b3VsZCBldmVuIGRlY2lkZSB0byBtYWtlIHRoYXQgV0FSTl9PTl9PTkNFKCkKPiBiZSBzb21ldGhp bmcgd2UgY291bGQgY29uZmlndXJlIG91dCwgYmVjYXVzZSBpdCdzIHJlYWxseSBhIGRlYnVnZ2lu Zwo+IHRoaW5nIGFuZCBpc24ndCBsaWtlIGl0IHNob3VsZCBiZSBhbGwgdGhhdCBmYXRhbC4KPiAK PiBOb25lIG9mIHRoaXMgaW5zYW5lIGNvbXBsaWNhdGVkIGNyYXAgdGhhdCBidXlzIHVzIGV4YWN0 bHkgKm5vdGhpbmcqLAo+IGFuZCBkZXBlbmRzIG9uIGZhbmN5IG5ldyBleGNlcHRpb24gaGFuZGxp bmcgc3VwcG9ydCBldGMgZXRjLgo+IAo+IFNvIHdoYXQncyB0aGUgZG93bnNpZGUgdG8ganVzdCBk b2luZyB0aGlzIHNpbXBsZSB0aGluZz8KClRoaXMgd2FzIG15IG9yaWdpbmFsIHN1Z2dlc3Rpb24g YXMgd2VsbC4KClRoZSBvYmplY3Rpb24gd2FzIHRoYXQgc29tZXRpbWVzIGl0J3MgcGVyZm9ybWFu Y2UgY3JpdGljYWwuIFRvIHdoaWNoIEkgcmVwbGllZCAKdGhhdCAxKSBJIGhpZ2hseSBkb3VidCB0 aGF0IGEgc2luZ2xlIGV4dHJhIGJyYW5jaCBvZiB0aGUgY2hlY2sgaXMgbWVhc3VyYWJsZSAyKSAK YW5kIGV2ZW4gaWYgc28sIHRoZW4gX3Rob3NlXyBwZXJmb3JtYW5jZSBjcml0aWNhbCBjYXNlcyBz aG91bGQgYmUgZG9uZSBpbiBzb21lIApzcGVjaWFsIHdheSAocmRtc3Jfbm9jaGVjaygpIG9yIHdo YXRldmVyKSAtIGF0IHdoaWNoIHBvaW50IHRoZSBhcmd1bWVudCB3YXMgdGhhdCAKdGhlcmUncyBh IGxvdCBvZiBzdWNoIGNhc2VzLgoKV2hpY2ggZmluYWwgbGluZSBvZiBhcmd1bWVudCBJIHN0aWxs IGRvbid0IHJlYWxseSBidXksIGJ0dy4sIGJ1dCBpdCBiZWNhbWUgYSBtZSAKYWdhaW5zdCBldmVy eW9uZSBlbHNlIGFyZ3VtZW50IGFuZCBJIGNvd2FyZGx5IHB1bnRlZC4KCk5vdyB0aGF0IHRoZSA4 MDAgbGIgZ29yaWxsYSBpcyBvbiBteSBzaWRlIEkgb2YgY291cnNlIHN0YW5kIG15IGdyb3VuZCwg cHJpbmNpcGxlcyAKYXJlIHByaW5jaXBsZXMhCgpUaGFua3MsCgoJSW5nbwoKX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlz dApYZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwpodHRwOi8vbGlzdHMueGVuLm9yZy94ZW4tZGV2ZWwK