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+hardware-based time keeping
+
+Hi all,
+
+I hope you're all doing well.
+
+As i was looking for a solution for a particular problem in Qemu/KVM
+virtualization.
+
+My issue is that I have a virtual machine that runs well in VMware and when
+I migrated that to Qemu/KVM-enabled environment, it didn't work! I figured
+out that under VMware hypervisor, VMware supplies CPU TSC and Performance
+Counters values to the guest VM with the option
+"monitor_control.pseudo_perfctr = TRUE" set the vmx configuration file,
+Ref.: https://www.vmware.com/pdf/vmware_timekeeping.pdf
+
+My question is, is there any similar option in Qemu/KVM-enabled environment
+that I can use to get my VM working the same way as in the VMware
+environment?
+
+I almost tried all options in Qemu with regards to CPU but no avail.
+
+To elaborate more, the VM I'm trying to port under Qemu/KVM environment is
+a an old version of Cisco virtual ASA Firewall. The VM image is actually
+meant to be run under VMware ESXi and with that
+"*monitor_control.pseudo_perfctr
+= TRUE*" option it can also run in Vware Workstation as well. *Yes, this
+option that makes it run under VMware and if it's removed from the
+configuration vmx file then the VM boots half way and crashes the same way
+it crashes under Qemu*. That dictates it's the option in interest that
+needs to be found in Qemu/KVM. I have a copy of this VM in the below link
+in case you would like to try its behavior in under VMware. I downloaded it
+from a youtube previously to test it out:
+
+https://drive.google.com/open?id=1SEXws18hoj2sWGk8iFqqH8RpBZsBNpRH
+
+Once you power on the VM you can telnet to 127.0.0.1 on port 3000 to see
+the boot process. If you remove that option i mentioned to you and boot the
+VM again you'll see the crashing in process.
+
+
+I've converted that vmdk disk images into Qemu disks "qcow2" format and i
+ran them using the below command line on Ubuntu:
+
+/opt/qemu/bin/qemu-system-x86_64 -L -nographic -device
+e1000-82545em,netdev=net0,mac=50:00:00:6a:00:00 -netdev
+tap,id=net0,ifname=vunl0_33_0,script=no -device
+e1000-82545em,netdev=net1,mac=50:00:00:6a:00:01 -netdev
+tap,id=net1,ifname=vunl0_33_1,script=no -device
+e1000-82545em,netdev=net2,mac=50:00:00:6a:00:02 -netdev
+tap,id=net2,ifname=vunl0_33_2,script=no -device
+e1000-82545em,netdev=net3,mac=50:00:00:6a:00:03 -netdev
+tap,id=net3,ifname=vunl0_33_3,script=no -machine type=pc-1.0  *-cpu
+host,migratable=off,invtsc=on,pmu=on* -m 4096 -hda hda.qcow2 -hdb hdb.qcow2
+-serial telnet:0.0.0.0:3000,server,nowait -monitor
+tcp:127.0.0.1:42379,server,nowait
+-nographic -display none -enable-kvm
+
+
+Once you power on the VM you can telnet to xx.xx.xx.xx 3000 (where the xx
+IP is the Ubuntu machine IP) to see the crashing in process. You may need
+to wait for a while for the status messages to appear in the terminal
+window.
+
+I assume it's a cpu issue because in page 9 of the Vmware pdf reference
+file; it says there are machine instructions become available when this
+option "*monitor_control.pseudo_perfctr = TRUE*" is enabled:
+
+The following machine instructions then become available:
+
+Instruction    Time Value    Returned
+rdpmc           0x10000       Physical host TSC
+rdpmc           0x10001       Elapsed real time in ns
+rdpmc           0x10002       Elapsed apparent time in ns
+
+Therefore, I used many of the Qemu cpu options such as these:
+
+-cpu host,migratable=no,+invtsc (ref: https://wiki.qemu.org/ChangeLog/2.1)
+-cpu host, tsc-frequency=xxxx (ref: https://lists.gnu.org/archive/
+html/qemu-devel/2017-01/msg03555.html)
+ -cpu host,migratable=off,invtsc=true,pmu=true
+
+Not sure if i'm hitting the wrong option!
+
+The log I'm getting when the VM boots up looks like the following crash
+happens at the blue colored log:
+
+----------------------------------------------------------------------------------------------------------------------------
+Loading...
+
+Starting image verification
+Hash Computation:    100% Done!
+Computed Hash   SHA2: 63c1e8aa9de3d0c6e738dc91be8e1784
+                      5caf64af4cf06cf6a3c5da7200d478dd
+                      938d380d2b1064f6a349401c7860f50e
+                      cc4eeb98a0ae16c097dbc9447d4d6626
+
+Get key records from key storage: Primary, key_store_type: 2
+Embedded Hash   SHA2: 63c1e8aa9de3d0c6e738dc91be8e1784
+                      5caf64af4cf06cf6a3c5da7200d478dd
+                      938d380d2b1064f6a349401c7860f50e
+                      cc4eeb98a0ae16c097dbc9447d4d6626
+
+The digital signature of the running image verified successfully
+Processor memory 3183296512, Reserved memory: 0
+
+Total NICs found: 4
+i82545EM rev03 Gigabit Ethernet @ irq10 dev 6 index 03 MAC: 5000.006a.0003
+i82545EM rev03 Gigabit Ethernet @ irq10 dev 5 index 02 MAC: 5000.006a.0002
+i82545EM rev03 Gigabit Ethernet @ irq11 dev 4 index 01 MAC: 5000.006a.0001
+i82545EM rev03 Gigabit Ethernet @ irq11 dev 3 index 00 MAC: 5000.006a.0000
+
+Thread Name: lina_flash_init_thread
+Page fault: Unknown
+        r8 0x0000000000000790
+        r9 0x00007fff3fa8b000
+       r10 0x0000000000000001
+       r11 0x000000000210e130
+       r12 0x00000000062ebfc0
+       r13 0x0000000000010001
+       r14 0x0000000000000000
+       r15 0x00000000062ebfc0
+       rdi 0x00000000062ebfc0
+       rsi 0x0000000006c17c20
+       rbp 0x00007fff4056f4e0
+       rbx 0x00000000062ebfc0
+       rdx 0x00007fff40566f10
+       rax 0x0000000000000001
+       rcx 0x0000000000010001
+       rsp 0x00007fff4056f4b0
+       rip 0x0000000001581130
+    eflags 0x0000000000013202
+    csgsfs 0x0000000000000033
+error code 0x0000000000000000
+    vector 0x000000000000000d
+  old mask 0xffffffde3e3b5a05
+       cr2 0x0000000000000000
+
+Cisco Adaptive Security Appliance Software Version 9.3(1)
+
+Compiled on Wed 23-Jul-14 18:16 PDT by builders
+Hardware:   ASAv
+Crashinfo collected on 03:42:24.059 UTC Tue Nov 28 2017
+
+Traceback:
+0: 0x0000000000422118
+1: 0x0000000000422152
+2: 0x0000000000424331
+3: 0x00000000015874a9
+4: 0x00007ffffecd55f0
+5: 0x0000000000558d85
+6: 0x00000000008f5a2b
+7: 0x00000000008fd361
+8: 0x0000000000428a15
+Stack dump: base:0x00007fff4056f2e0 size:178, active:178
+     entries above '==': return PC preceded by input parameters
+     entries below '==': local variables followed by saved regs
+                 '==Fn': stack frame n, contains next stack frame
+                    '*': stack pointer at crash
+ rdi rsi rdx rcx r8 r9 : Arguments 1 through 6 to leaf function
+ For example:
+    0x00007fffeeeeef00: 0x0000000000000009     : arg9
+    0x00007fffeeeeeefc: 0x0000000000000008     : arg8
+    0x00007fffeeeeeef8: 0x0000000000000007     : arg7
+    0x00007fffeeeeeef4: 0x0000000000000abc     : return PC
+    0x00007fffeeeeeef0: 0x00007fffeeeeef20 ==F2: stack frame F2
+    0x00007fffeeeeeeec: 0x0000000000000def     : local variable
+    0x00007fffeeeeeee8: 0x0000000000000123     : local variable or saved reg
+    0x00007fffeeeeeee4: 0x0000000000000456     : local variable or saved reg
+    0x00007fffeeeeeee0: 0x0000000000000789     : local variable or saved reg
+0x00007fff4056f870: 0x00007fff4056f7e0
+0x00007fff4056f868: 0x0000000000000000
+0x00007fff4056f860: 0x00000038a11c0123
+0x00007fff4056f858: 0x0000000000000083
+0x00007fff4056f850: 0x00007fff16a864c8
+0x00007fff4056f848: 0x0000000000000000
+0x00007fff4056f840: 0x00000000a11ccdef
+0x00007fff4056f838-0x00007fff4056f808: 0x0000000000000000
+0x00007fff4056f800: 0x0000000000429867
+0x00007fff4056f7f8: 0x00007fff4056f860
+0x00007fff4056f7f0: 0x00007fff40567100
+0x00007fff4056f7e8: 0x0000000000000000
+0x00007fff4056f7e0: 0x00000030a11c0123
+0x00007fff4056f7d8: 0x0000000000000083
+0x00007fff4056f7d0: 0x00007fff16a864c8
+0x00007fff4056f7c8: 0x0000000000000000
+0x00007fff4056f7c0: 0x00000000a11ccdef
+0x00007fff4056f7b8: 0x0fffffff0fffffff
+0x00007fff4056f7b0-0x00007fff4056f7a8: 0x0000000000000000
+0x00007fff4056f7a0: 0x00000000062cc8a0
+0x00007fff4056f798: 0x0000000000000000
+0x00007fff4056f790: 0x00007fff4056f6e0
+0x00007fff4056f788: 0x00007fff4056f758
+0x00007fff4056f780: 0x0000000000000000
+0x00007fff4056f778: 0x00007fff3ff48620
+0x00007fff4056f770-0x00007fff4056f730: 0x0000000000000000
+0x00007fff4056f728: 0x0000000004d14940
+0x00007fff4056f720: 0x000000000041d690
+0x00007fff4056f718: 0x0000000002777640
+0x00007fff4056f710: 0x0000000200010010
+0x00007fff4056f708: 0x0000000006c17d40
+0x00007fff4056f700: 0x00007fff4056f6e0
+0x00007fff4056f6f8: 0x00007fff40150e80
+0x00007fff4056f6f0: 0x000000000638e598
+0x00007fff4056f6e8: 0x00007fff3ff48620
+0x00007fff4056f6e0: 0x00007fff4056f778
+0x00007fff4056f6d8: 0x00000000deadfeed
+0x00007fff4056f6d0-0x00007fff4056f6c8: 0x0000000000000000
+0x00007fff4056f6c0: 0x000000000041e1f6
+0x00007fff4056f6b8: 0x00007fff40571fd0
+0x00007fff4056f6b0: 0x00007fff40560cf0
+0x00007fff4056f6a8: 0x0000000000000000
+0x00007fff4056f6a0: 0x000000f0a11c0123
+0x00007fff4056f698: 0x0000000000000143
+0x00007fff4056f690: 0x00007fff16a864c8
+0x00007fff4056f688: 0x0000000000000000
+0x00007fff4056f680: 0x00000000a11ccdef
+0x00007fff4056f678-0x00007fff4056f660: 0x0000000000000000 ==F5
+0x00007fff4056f658: 0x000000009abcdef0
+0x00007fff4056f650-0x00007fff4056f5b8: 0x123456789abcdef0
+0x00007fff4056f5b0: 0x0000000000428a01
+0x00007fff4056f5a8: 0x00007fff4056f570
+0x00007fff4056f5a0-0x00007fff4056f590: 0x0000000000000000
+0x00007fff4056f588: 0xffffffffffffdf98
+0x00007fff4056f580: 0x00007fff4056f670
+0x00007fff4056f578: 0x00007fff3ff48370
+0x00007fff4056f570: 0x0000000000000000
+0x00007fff4056f568: 0x0000000000428a15
+0x00007fff4056f560: 0x00007fff4056f670 ==F4
+0x00007fff4056f558: 0x00000000008fd361
+0x00007fff4056f550: 0x00007fff4056f560 ==F3
+0x00007fff4056f548: 0x00000000008f5a2b
+0x00007fff4056f540: 0x00007fff4056f550 ==F2
+0x00007fff4056f538: 0x0000000000000000
+0x00007fff4056f530: 0xffffffffffffdf98
+0x00007fff4056f528: 0x00007fff3ff48370
+0x00007fff4056f520: 0x00000000008fba90
+0x00007fff4056f518: 0x00000000008fb908
+0x00007fff4056f510: 0x00007fff4056f550
+0x00007fff4056f508: 0x00000000008fb87e
+0x00007fff4056f500: 0x00007fff4056f510
+0x00007fff4056f4f8: 0x0000000000000000
+0x00007fff4056f4f0: 0xffffffffffffdf98
+0x00007fff4056f4e8: 0x0000000000558d85
+0x00007fff4056f4e0: 0x00007fff4056f540 ==F1
+0x00007fff4056f4d8-0x00007fff4056f4d0: 0x0000000000000000
+0x00007fff4056f4c8: 0x0000000000000001
+0x00007fff4056f4c0-0x00007fff4056f4b8: 0x00000000062ebfc0
+0x00007fff4056f4b0: 0x0000000000000000 *
+0x00007fff4056f4a8: 0x00000000008fd973
+0x00007fff4056f4a0: 0x00007fff4056f4d0
+0x00007fff4056f498: 0x00007fff40563908
+0x00007fff4056f490: 0x00007fff4056f4d0
+0x00007fff4056f488: 0x00000000009d4b01
+0x00007fff4056f480: 0x00007fff4056f4a0
+0x00007fff4056f478-0x00007fff4056f470: 0x0000000000000000
+0x00007fff4056f468: 0x00007fff418d6390
+0x00007fff4056f460: 0x0000000000000000
+0x00007fff4056f458: 0x000000000201b9f8
+0x00007fff4056f450: 0x00007fff4056f480
+0x00007fff4056f448: 0x00007fff40563908
+0x00007fff4056f440: 0x0000000000000001
+0x00007fff4056f438: 0x00007fff405619a0
+0x00007fff4056f430: 0x00007fff40563908
+0x00007fff4056f428: 0x0000000000000001
+0x00007fff4056f420: 0x0000000000000000
+0x00007fff4056f418: 0x0000000001627125
+0x00007fff4056f410: 0x00007fff4056f450
+0x00007fff4056f408: 0x00007fff3fa8b010
+0x00007fff4056f400: 0x00007fff46505845
+0x00007fff4056f3f8-0x00007fff4056f3c8: 0x0000000000000000
+0x00007fff4056f3c0: 0x0000000000000003
+0x00007fff4056f3b8-0x00007fff4056f3a8: 0x0000000000000000
+0x00007fff4056f3a0: 0x0000000000000240
+0x00007fff4056f398: 0x0000000000000003
+0x00007fff4056f390: 0x0000024446505853
+0x00007fff4056f388-0x00007fff4056f310: 0x0000000000000000
+0x00007fff4056f308: 0x424b7e25fece8fc2
+0x00007fff4056f300: 0x2cc4f98473045e95
+0x00007fff4056f2f8: 0x18fa9b6c57ca0e78
+0x00007fff4056f2f0: 0x081e2a254ab96aa4
+0x00007fff4056f2e8: 0x0000000300000000
+
+Begin to dump crashinfo to flash....
+
+core0: An internal error occurred.  Specifically, a programming assertion
+was
+violated.  Copy the error message exactly as it appears, and get the
+output of the show version command and the contents of the configuration
+file.  Then call your technical support representative.
+
+assertion "_vf_mode_init" failed: file "vf_api.c", line 136
+core0 same core snap_count=1 signo=6 RIP=7ffffecd43fb
+
+
+-----------------------------------------------
+Traceback output aborted.
+Flushing first exception frame:
+Page fault: Unknown
+        r8 0x0000000000000790
+        r9 0x00007fff3fa8b000
+       r10 0x0000000000000001
+       r11 0x000000000210e130
+       r12 0x00000000062ebfc0
+       r13 0x0000000000010001
+       r14 0x0000000000000000
+       r15 0x00000000062ebfc0
+       rdi 0x00000000062ebfc0
+       rsi 0x0000000006c17c20
+       rbp 0x00007fff4056f4e0
+       rbx 0x00000000062ebfc0
+       rdx 0x00007fff40566f10
+       rax 0x0000000000000001
+       rcx 0x0000000000010001
+       rsp 0x00007fff4056f4b0
+       rip 0x0000000001581130
+    eflags 0x0000000000013202
+    csgsfs 0x0000000000000033
+error code 0x0000000000000000
+    vector 0x000000000000000d
+  old mask 0xffffffde3e3b5a05
+       cr2 0x0000000000000000
+Nested traceback attempted via signal, from:
+Abort: Unknown
+        r8 0x000000000000003c
+        r9 0x0000000005097a27
+       r10 0x00007fff4056de28
+       r11 0x0000000000003206
+       r12 0x0000000000000001
+       r13 0x00007fff4056df80
+       r14 0x0000000000000000
+       r15 0x0000000000000006
+       rdi 0x0000000000000008
+       rsi 0x00007fff4056df80
+       rbp 0x00007fff4056dfc0
+       rbx 0x00007fff29f6b780
+       rdx 0x0000000000000010
+       rax 0x0000000000000010
+       rcx 0xffffffffffffffff
+       rsp 0x00007fff4056df50
+       rip 0x00007ffffecd43fb
+    eflags 0x0000000000003206
+    csgsfs 0x1234000000000033
+error code 0x0000000000000000
+    vector 0x000000000000000d
+  old mask 0xffffffde3e3b5a05
+       cr2 0x0000000000000000
+
+Cisco Adaptive Security Appliance Software Version 9.3(1)
+
+Compiled on Wed 23-Jul-14 18:16 PDT by builders
+Hardware:   ASAv
+Crashinfo collected on 03:42:24.059 UTC Tue Nov 28 2017
+
+Traceback:
+0: 0x0000000000422118
+1: 0x00000000004221f8
+2: 0x000000000042226d
+3: 0x0000000001587076
+4: 0x00007ffffecd55f0
+5: 0x00000000015820a0
+6: 0x000000000212d482
+7: 0x000000000139f304
+8: 0x000000000213f315
+9: 0x0000000001460873
+10: 0x0000000001488625
+11: 0x0000000000423e7a
+12: 0x00000000004244dc
+13: 0x00000000015874a9
+14: 0x00007ffffecd55f0
+15: 0x0000000000558d85
+16: 0x00000000008f5a2b
+17: 0x00000000008fd361
+18: 0x0000000000428a15
+-----------------------------------------------
+Process shutdown finished
+Rebooting.....
+
+Thanks in advance for your help! :)
+
+Regards,
+Abdullah Alhaddad
\ No newline at end of file