From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: x86/mce/AMD: Make sure banks were initialized before accessing them From: Borislav Petkov Message-Id: <20181127132603.GE26395@zn.tnic> Date: Tue, 27 Nov 2018 14:26:03 +0100 To: =?utf-8?B?UmFmYcWCIE1pxYJlY2tp?= Cc: John Clemens , Yazen Ghannam , Tony Luck , linux-edac@vger.kernel.org, Aravind Gopalakrishnan , Thomas Gleixner , Ingo Molnar , "H . Peter Anvin" , x86@kernel.org, =?utf-8?B?UmFmYcWCIE1pxYJlY2tp?= List-ID: T24gVHVlLCBOb3YgMjcsIDIwMTggYXQgMDI6MDY6MDlQTSArMDEwMCwgUmFmYcWCIE1pxYJlY2tp IHdyb3RlOgo+IEkgaGFwcGVuIHRvIGhhdmUgdGhlIHNhbWUgbm90ZWJvb2sgd2l0aCB0aGUgc2Ft ZSBCSU9TIGFuZCB0aGUgc2FtZQo+IHByb2JsZW0uIFNvIGxldCBtZSB0ZXN0IGl0IDopIChzZWUg YmVsb3cpLgoKRXZlbiBiZXR0ZXIhIEkgbWlnaHQgYXNrIHlvdSBkbyB0byBhIGNvdXBsZSBtb3Jl IHRlc3RzIGlmIHlvdSBkb24ndAptaW5kLiBCdXQgbGF0ZXIsIG9uY2Ugd2UndmUgZmlndXJlZCBv dXQgd2hhdCBleGFjdGx5IHdlIHNob3VsZCBkby4KCj4gVGhhdCdzIGNvcnJlY3QsIHdpdGggeW91 ciBwYXRjaCBJIHNlZSB0aG9zZSBtZXNzYWdlcyBidXQga2VybmVsIGJvb3RzIQoKR29vZC4KCj4g SXMgdGhhdCBhIHZhbGlkIG1hdGVyaWFsIGZvciBhIHBhdGNoPyBJZiBzbywgeW91IGNhbiBhZGQg bXk6Cj4gVGVzdGVkLWJ5OiBSYWZhxYIgTWnFgmVja2kgPHJhZmFsQG1pbGVja2kucGw+CgpUaGFu a3MuCgpTbyB5ZWFoLCBJIHRoaW5rIHRoYXQncyBzbWFsbCBlbm91Z2ggdG8gYmUgc3RhYmxlIG1h dGVyaWFsLgoKTm93LCBldmVuIGlmIHRoYXQgaXMgdGhlIHByb3BlciBiZWhhdmlvciBvZiAqZmly c3QqIGluaXRpYWxpemluZyBhbmQKc2V0dGluZyB1cCBhbGwgdGhlIHN0cnVjdHVyZXMgYW5kIG9u bHkgKnRoZW4qIHNldHRpbmcgdXAgdGhlIElSUSBoYW5kbGVyCndoaWNoIGFjY2Vzc2VzIHRoZW0s IHdlIHN0aWxsIGdldDoKCj4gWyAgICAxLjA1OTE4N10gVW5leHBlY3RlZCB0aHJlc2hvbGQgaW50 ZXJydXB0IGF0IHZlY3RvciBmOQoKYW5kIGl0IHByb2JhYmx5IHdpbGwgYmUgYmV0dGVyIHRvIGlu aXRpYWxpemUgdGhvc2Ugc3RydWN0dXJlcyBlYXJsaWVyCnNvIHRoYXQgd2UgYmUgYWJsZSB0byBh Y3R1YWxseSBwcm9jZXNzIHRoYXQgdGhyZXNob2xkaW5nIGludGVycnVwdApwcm9wZXJseS4KCkFu ZCBkb2luZyB0aGF0IGlzIG5vdCB0cml2aWFsIGJlY2F1c2Ugb2YgdGhpcyBuYXN0eSBvcmRlciBm b3IgeGVuIC0Kc2VlIGNvbW1lbnQgYXQgZW5kIG9mIGFyY2gveDg2L2tlcm5lbC9jcHUvbWNoZWNr L21jZV9hbWQuYyAtIGJ1dCB0aGF0CnNob3VsZG4ndCBzdG9wIHVzIHRvIGltcHJvdmUgc3R1ZmYg b24gYmFyZW1ldGFsLiBTbyBpdCdsbCB0YWtlIGEgYml0CmxvbmdlciB0byBkby4KClRoYXQncyB3 aHkgaXQgd291bGQgYmUgY29vbCBpZiB5b3UgY291bGQgdGVzdCBzb21lIGZpeGVzIGxhdGVyIG9u IHlvdXIKbWFjaGluZS4gQW5kIHBscyBkZWxheSB1cGdyYWRpbmcgeW91ciBCSU9TIGlmLCBpbiB0 aGUgY291cnNlIG9mIHRoYXQKZml4aW5nLCBzb21lb25lIHRlbGxzIHlvdSB0byBkbyBzbyBiZWNh dXNlIHRoZW4gdGhhdCBlYXJseSB0aHJlc2hvbGRpbmcKd2lsbCBiZSBmaXhlZCBhbmQgd2Ugd29u J3QgYmUgYWJsZSB0byB0ZXN0IHRoZSBmaW5hbCBmaXguIDotKQoKWW91IGNhbiBhbHdheXMgdXBn cmFkZSBpdCBhZnRlciB0aGF0LCBpZiBpdCBpcyBvay4KClRoYW5rcyBhIGxvdCEK