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: <20181218190546.GL7485@zn.tnic> Date: Tue, 18 Dec 2018 20:05:46 +0100 To: =?utf-8?B?UmFmYcWCIE1pxYJlY2tp?= Cc: =?utf-8?B?UmFmYcWCIE1pxYJlY2tp?= , John Clemens , Yazen Ghannam , Tony Luck , linux-edac@vger.kernel.org, Aravind Gopalakrishnan , Thomas Gleixner , Ingo Molnar , "H . Peter Anvin" , x86@kernel.org List-ID: T24gRnJpLCBOb3YgMzAsIDIwMTggYXQgMTE6NTk6NDJBTSArMDEwMCwgQm9yaXNsYXYgUGV0a292 IHdyb3RlOgo+IFRoYXQgc2NyaXB0IGNvdWxkIGJlIHBsYWNlZCBpbiBEb2N1bWVudGF0aW9uL3g4 Ni8gb3Igc28sIHNvIHRoYXQgcGVvcGxlCj4gY2FuIGRlY29kZSBzdWNoIGVhcmx5IGVycm9ycy4K PiAKPiBJJ2xsIHdyaXRlIHVwIHNvbWV0aGluZyBzb29uaXNoLgoKSGVyZSdzIHNvbWV0aGluZyBi ZWxvdy4gWW91IGRvOgoKZG1lc2cgfCBtY2UtdG8taW5qLnB5Cgp3aGVuIGRtZXNnIGNvbnRhaW5z IHRoZSBNQ0UuIEl0IHNob3VsZCBvdXRwdXQgc29tZXRoaW5nIGxpa2UgdGhpczoKCmVjaG8gNCA+ IC9zeXMva2VybmVsL2RlYnVnL21jZS1pbmplY3QvY3B1CmVjaG8gMHhkODIwMDAwMDAwMGEwMTUx ID4gL3N5cy9rZXJuZWwvZGVidWcvbWNlLWluamVjdC9zdGF0dXMKZWNobyAweGQwMWIwZmZmMDAw MDAwMDAgPiAvc3lzL2tlcm5lbC9kZWJ1Zy9tY2UtaW5qZWN0L21pc2MKZWNobyAweDRhMDAwMDAw ID4gL3N5cy9rZXJuZWwvZGVidWcvbWNlLWluamVjdC9zeW5kCmVjaG8gc3cgPiAvc3lzL2tlcm5l bC9kZWJ1Zy9tY2UtaW5qZWN0L2ZsYWdzCmVjaG8gMSA+IC9zeXMva2VybmVsL2RlYnVnL21jZS1p bmplY3QvYmFuawoKRm9yIHRoYXQgeW91IG5lZWQgdGhlIGluamVjdGlvbiBtb2R1bGUgbG9hZGVk LCBpLmUuLAoKQ09ORklHX1g4Nl9NQ0VfSU5KRUNUPW0KCmFuZCBtb2Rwcm9iZSBtY2UtaW5qZWN0 CgpBbHNvLCB0aGUgYXNzdW1wdGlvbiBpcyB0aGF0IGRlYnVnZnMgaXMgbW91bnRlZCBvbiB0aGUg ZGVmYXVsdAovc3lzL2tlcm5lbC9kZWJ1ZyBtb3VudHBvaW50LgoKU28gd2hlbiB5b3UgcnVuIHRo b3NlIGxpbmVzIGFib3ZlIGFzIHJvb3QsIHlvdSBzaG91bGQgc2VlIHRoZSBkZWNvZGVkCmVycm9y IGluIGRtZXNnLCBpLmUuLCB0aGlzIHRoaW5nOgoKWyAgICAxLjA3OTc4OV0gW0hhcmR3YXJlIEVy cm9yXTogQ29ycmVjdGVkIGVycm9yLCBubyBhY3Rpb24gcmVxdWlyZWQuClsgICAgMS4wNzk3ODld IFtIYXJkd2FyZSBFcnJvcl06IENQVTo0ICgxNzoxMTowKSBNQzFfU1RBVFVTW092ZXJ8Q0V8TWlz Y1Z8LXwtfC18LXxTeW5kVnwtXTogMHhkODIwMDAwMDAwMGEwMTUxClsgICAgMS4wNzk3ODldIFtI YXJkd2FyZSBFcnJvcl06IElQSUQ6IDB4MDAwMTAwYjAwMDAwMDAwMCwgU3luZHJvbWU6IDB4MDAw MDAwMDA0YTAwMDAwMApbICAgIDEuMDc5Nzg5XSBbSGFyZHdhcmUgRXJyb3JdOiBJbnN0cnVjdGlv biBGZXRjaCBVbml0IEV4dGVuZGVkIEVycm9yIENvZGU6IDEwClsgICAgMS4wNzk3ODldIFtIYXJk d2FyZSBFcnJvcl06IEluc3RydWN0aW9uIEZldGNoIFVuaXQgRXJyb3I6IEwxIEJUQiBtdWx0aS1t YXRjaCBlcnJvci4KWyAgICAxLjA3OTc4OV0gW0hhcmR3YXJlIEVycm9yXTogY2FjaGUgbGV2ZWw6 IEwxLCB0eDogSU5TTiwgbWVtLXR4OiBJUkQKCkhUSC4KLS0tCiMhL3Vzci9iaW4vcHl0aG9uCgpp bXBvcnQgcmUKaW1wb3J0IHN5cwoKYmFuayA9IDAKCmZvciBsaW5lIGluIHN5cy5zdGRpbjoKCiAg ICBtID0gcmUubWF0Y2gocideLiptY2U6LipDUFUgKD9QPGNwdT5cZCspOiBNYWNoaW5lIENoZWNr LipCYW5rICg/UDxiYW5rPlxkKyk6ICg/UDxzdGF0dXM+WzAtOWEtZl0rKScsIGxpbmUpCiAgICBp ZiBtOgogICAgICAgIGJhbmsgPSBtLmdyb3VwKCdiYW5rJykKICAgICAgICBwcmludCAoImVjaG8g JXMgPiAvc3lzL2tlcm5lbC9kZWJ1Zy9tY2UtaW5qZWN0L2NwdSIgJSAobS5ncm91cCgnY3B1Jyks ICkpCiAgICAgICAgcHJpbnQgKCJlY2hvIDB4JXMgPiAvc3lzL2tlcm5lbC9kZWJ1Zy9tY2UtaW5q ZWN0L3N0YXR1cyIgJSAobS5ncm91cCgnc3RhdHVzJyksICkpCiAgICAgICAgY29udGludWUKCiAg ICBtID1yZS5tYXRjaChyJ14uKm1jZTouKk1JU0MgKD9QPG1pc2M+WzAtOWEtZl0rKScsIGxpbmUp CiAgICBpZiBtOgogICAgICAgIHByaW50ICgiZWNobyAweCVzID4gL3N5cy9rZXJuZWwvZGVidWcv bWNlLWluamVjdC9taXNjIiAlIChtLmdyb3VwKCdtaXNjJyksICkpCgogICAgbSA9cmUubWF0Y2go cideLiptY2U6LipTWU5EICg/UDxzeW5kPlswLTlhLWZdKyknLCBsaW5lKQogICAgaWYgbToKICAg ICAgICBwcmludCAoImVjaG8gMHglcyA+IC9zeXMva2VybmVsL2RlYnVnL21jZS1pbmplY3Qvc3lu ZCIgJSAobS5ncm91cCgnc3luZCcpLCApKQoKICAgICMgbGFzdCBsaW5lIGluIHRoZSBzdGFuemEK ICAgIG0gPSByZS5tYXRjaChyJ14uKm1jZTouKlBST0NFU1NPUi4qVElNRS4qU09DS0VULipBUElD LiptaWNyb2NvZGUnLCBsaW5lKQogICAgaWYgbToKICAgICAgICBwcmludCAoImVjaG8gc3cgPiAv c3lzL2tlcm5lbC9kZWJ1Zy9tY2UtaW5qZWN0L2ZsYWdzIikKICAgICAgICBwcmludCAoImVjaG8g JXMgPiAvc3lzL2tlcm5lbC9kZWJ1Zy9tY2UtaW5qZWN0L2JhbmtcbiIgJSAoYmFuaywgKSkK