[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] booting domU guest as pvh works in xen-4.11.1 but fails in 4.12


  • To: "YOUNG, MICHAEL A." <m.a.young@xxxxxxxxxxxx>
  • From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  • Date: Fri, 31 May 2019 15:16:14 -0700
  • Authentication-results: esa2.hc3370-68.iphmx.com; dkim=none (message not signed) header.i=none; spf=None smtp.pra=andrew.cooper3@xxxxxxxxxx; spf=Pass smtp.mailfrom=Andrew.Cooper3@xxxxxxxxxx; spf=None smtp.helo=postmaster@xxxxxxxxxxxxxxxxxxxxxxxxxx
  • Autocrypt: addr=andrew.cooper3@xxxxxxxxxx; prefer-encrypt=mutual; keydata= mQINBFLhNn8BEADVhE+Hb8i0GV6mihnnr/uiQQdPF8kUoFzCOPXkf7jQ5sLYeJa0cQi6Penp VtiFYznTairnVsN5J+ujSTIb+OlMSJUWV4opS7WVNnxHbFTPYZVQ3erv7NKc2iVizCRZ2Kxn srM1oPXWRic8BIAdYOKOloF2300SL/bIpeD+x7h3w9B/qez7nOin5NzkxgFoaUeIal12pXSR Q354FKFoy6Vh96gc4VRqte3jw8mPuJQpfws+Pb+swvSf/i1q1+1I4jsRQQh2m6OTADHIqg2E ofTYAEh7R5HfPx0EXoEDMdRjOeKn8+vvkAwhviWXTHlG3R1QkbE5M/oywnZ83udJmi+lxjJ5 YhQ5IzomvJ16H0Bq+TLyVLO/VRksp1VR9HxCzItLNCS8PdpYYz5TC204ViycobYU65WMpzWe LFAGn8jSS25XIpqv0Y9k87dLbctKKA14Ifw2kq5OIVu2FuX+3i446JOa2vpCI9GcjCzi3oHV e00bzYiHMIl0FICrNJU0Kjho8pdo0m2uxkn6SYEpogAy9pnatUlO+erL4LqFUO7GXSdBRbw5 gNt25XTLdSFuZtMxkY3tq8MFss5QnjhehCVPEpE6y9ZjI4XB8ad1G4oBHVGK5LMsvg22PfMJ ISWFSHoF/B5+lHkCKWkFxZ0gZn33ju5n6/FOdEx4B8cMJt+cWwARAQABtClBbmRyZXcgQ29v cGVyIDxhbmRyZXcuY29vcGVyM0BjaXRyaXguY29tPokCOgQTAQgAJAIbAwULCQgHAwUVCgkI CwUWAgMBAAIeAQIXgAUCWKD95wIZAQAKCRBlw/kGpdefoHbdD/9AIoR3k6fKl+RFiFpyAhvO 59ttDFI7nIAnlYngev2XUR3acFElJATHSDO0ju+hqWqAb8kVijXLops0gOfqt3VPZq9cuHlh IMDquatGLzAadfFx2eQYIYT+FYuMoPZy/aTUazmJIDVxP7L383grjIkn+7tAv+qeDfE+txL4 SAm1UHNvmdfgL2/lcmL3xRh7sub3nJilM93RWX1Pe5LBSDXO45uzCGEdst6uSlzYR/MEr+5Z JQQ32JV64zwvf/aKaagSQSQMYNX9JFgfZ3TKWC1KJQbX5ssoX/5hNLqxMcZV3TN7kU8I3kjK mPec9+1nECOjjJSO/h4P0sBZyIUGfguwzhEeGf4sMCuSEM4xjCnwiBwftR17sr0spYcOpqET ZGcAmyYcNjy6CYadNCnfR40vhhWuCfNCBzWnUW0lFoo12wb0YnzoOLjvfD6OL3JjIUJNOmJy RCsJ5IA/Iz33RhSVRmROu+TztwuThClw63g7+hoyewv7BemKyuU6FTVhjjW+XUWmS/FzknSi dAG+insr0746cTPpSkGl3KAXeWDGJzve7/SBBfyznWCMGaf8E2P1oOdIZRxHgWj0zNr1+ooF /PzgLPiCI4OMUttTlEKChgbUTQ+5o0P080JojqfXwbPAyumbaYcQNiH1/xYbJdOFSiBv9rpt TQTBLzDKXok86LkCDQRS4TZ/ARAAkgqudHsp+hd82UVkvgnlqZjzz2vyrYfz7bkPtXaGb9H4 Rfo7mQsEQavEBdWWjbga6eMnDqtu+FC+qeTGYebToxEyp2lKDSoAsvt8w82tIlP/EbmRbDVn 7bhjBlfRcFjVYw8uVDPptT0TV47vpoCVkTwcyb6OltJrvg/QzV9f07DJswuda1JH3/qvYu0p vjPnYvCq4NsqY2XSdAJ02HrdYPFtNyPEntu1n1KK+gJrstjtw7KsZ4ygXYrsm/oCBiVW/OgU g/XIlGErkrxe4vQvJyVwg6YH653YTX5hLLUEL1NS4TCo47RP+wi6y+TnuAL36UtK/uFyEuPy wwrDVcC4cIFhYSfsO0BumEI65yu7a8aHbGfq2lW251UcoU48Z27ZUUZd2Dr6O/n8poQHbaTd 6bJJSjzGGHZVbRP9UQ3lkmkmc0+XCHmj5WhwNNYjgbbmML7y0fsJT5RgvefAIFfHBg7fTY/i kBEimoUsTEQz+N4hbKwo1hULfVxDJStE4sbPhjbsPCrlXf6W9CxSyQ0qmZ2bXsLQYRj2xqd1 bpA+1o1j2N4/au1R/uSiUFjewJdT/LX1EklKDcQwpk06Af/N7VZtSfEJeRV04unbsKVXWZAk uAJyDDKN99ziC0Wz5kcPyVD1HNf8bgaqGDzrv3TfYjwqayRFcMf7xJaL9xXedMcAEQEAAYkC HwQYAQgACQUCUuE2fwIbDAAKCRBlw/kGpdefoG4XEACD1Qf/er8EA7g23HMxYWd3FXHThrVQ HgiGdk5Yh632vjOm9L4sd/GCEACVQKjsu98e8o3ysitFlznEns5EAAXEbITrgKWXDDUWGYxd pnjj2u+GkVdsOAGk0kxczX6s+VRBhpbBI2PWnOsRJgU2n10PZ3mZD4Xu9kU2IXYmuW+e5KCA vTArRUdCrAtIa1k01sPipPPw6dfxx2e5asy21YOytzxuWFfJTGnVxZZSCyLUO83sh6OZhJkk b9rxL9wPmpN/t2IPaEKoAc0FTQZS36wAMOXkBh24PQ9gaLJvfPKpNzGD8XWR5HHF0NLIJhgg 4ZlEXQ2fVp3XrtocHqhu4UZR4koCijgB8sB7Tb0GCpwK+C4UePdFLfhKyRdSXuvY3AHJd4CP 4JzW0Bzq/WXY3XMOzUTYApGQpnUpdOmuQSfpV9MQO+/jo7r6yPbxT7CwRS5dcQPzUiuHLK9i nvjREdh84qycnx0/6dDroYhp0DFv4udxuAvt1h4wGwTPRQZerSm4xaYegEFusyhbZrI0U9tJ B8WrhBLXDiYlyJT6zOV2yZFuW47VrLsjYnHwn27hmxTC/7tvG3euCklmkn9Sl9IAKFu29RSo d5bD8kMSCYsTqtTfT6W4A3qHGvIDta3ptLYpIAOD2sY3GYq2nf3Bbzx81wZK14JdDDHUX2Rs 6+ahAA==
  • Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Pry Mar <pryorm09@xxxxxxxxx>
  • Delivery-date: Fri, 31 May 2019 22:16:29 +0000
  • Ironport-sdr: +1BZVFbxaWtFQO3Vl53p84zg4bp2mdTUX/pnwCZyAPuyOvgq1eqkOZl9gDTqCpQybg0AlI0joI H+YeyoibXTnEwvNAmOPOBv1td71i5pwS9KisyXZfRcUzyCKtmZc1/iciDNVyZnRyrpkWk9XW7K ya2Zu73lIbI8l4aGGuXNprhQcKbkWf4i9KeYXoN9bm6U05NSkNX5YevN1QfYYfhjV+OrXeGAvA EdfnE6uc+Jz9y3Lo1Mf6ECYVfvoReC2B9gZGsO3tvl2GDh3oD6iAvgNWhLuJbssLtUYGYjw6Ws PiQ=
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
  • Openpgp: preference=signencrypt

On 31/05/2019 12:18, YOUNG, MICHAEL A. wrote:
> On Tue, 16 Apr 2019, M A Young wrote:
>
>> On Tue, 16 Apr 2019, Andrew Cooper wrote:
>>
>>> From the log:
>>>
>>> traps: modprobe[48] trap invalid opcode ip:7f797dc7bb95 sp:7ffe3099cdb8 erro
>>> r:0 in ld-2.29.so[7f797dc61000+21000]
>>>
>>>
>>> Can you disassemble ld-2.29.so and find out what that instruction is?  It is
>>> almost certainly a related factor.
>> I get lines like
>> [    1.384356] traps: modprobe[36] trap invalid opcode ip:7f57448af179
>> sp:7fff8fc3a938 error:0 in ld-2.29.so[7f5744895000+20000]
>>
>> I am guessing the right place to look in ld-2.29.so is
>> 0x7f57448af179-0x7f57448950000-20000 = 86873 in which case I get
>> (gdb) x/10i 86873
>>   0x15359 <_dl_close_worker+3593>:   mov    (%rsi,%rcx,8),%r8
>>   0x1535d <_dl_close_worker+3597>:   testb  $0x20,0x31d(%r8)
>>   0x15365 <_dl_close_worker+3605>:   jne    0x15375
>> <_dl_close_worker+3621>
>>   0x15367 <_dl_close_worker+3607>:   cmp    %ecx,%edx
>>   0x15369 <_dl_close_worker+3609>:   je     0x15372
>> <_dl_close_worker+3618>
>>   0x1536b <_dl_close_worker+3611>:   mov    %edx,%r9d
>>   0x1536e <_dl_close_worker+3614>:   mov    %r8,(%rsi,%r9,8)
>>   0x15372 <_dl_close_worker+3618>:   add    $0x1,%edx
>>   0x15375 <_dl_close_worker+3621>:   add    $0x1,%rcx
>>   0x15379 <_dl_close_worker+3625>:   cmp    %ecx,%eax
>>
>> Some more lines like this are
>> [    1.571479] traps: modprobe[41] trap invalid opcode ip:7f3e3628d179
>> sp:7ffc86abbe08 error:0 in ld-2.29.so[7f3e36273000+20000]
>> [    1.630562] traps: modprobe[43] trap invalid opcode ip:7f227b39a179
>> sp:7ffdfd943198 error:0 in ld-2.29.so[7f227b380000+20000]
>> which all seem to get to the same place. Is this useful or am I looking in
>> the wrong place?
> I did a bisect on this issue, and it identified the first bad commit as 
> fd32dcfe4c9a539f8e5d26ff4c5ca50ee54556b2
> x86/vmx: Don't leak EFER.NXE into guest context

Aah - this will be a harpertown core.

You need e28c0ee3356f52f589bbae54e89aaed25c1f599d from staging, which
has been backported to staging-4.12
(8457c15b981ba04c0709e6f25af3b76beb34cafa) two weeks ago.

This but accidentally resulted in the SYSCALL instruction being disabled
behind the back of the guest, which broke all userspace system calls.

~Andrew

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel

 


Rackspace

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.