[Xen-bugs] [Bug 704] New: [XEN-HVM] Guests not booting unless setting "cpus=<num>"

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=704

           Summary: [XEN-HVM] Guests not booting unless setting "cpus=<num>"
           Product: Xen
           Version: unstable
          Platform: x86-64
        OS/Version: Linux
            Status: NEW
          Severity: critical
          Priority: P1
         Component: HVM
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: ricardoz@xxxxxxxxxx
                CC: niv@xxxxxxxxxx, pl@xxxxxxxxxx, dbarrera@xxxxxxxxxx,
                    khoa@xxxxxxxxxx


dom0 OS: sles9-sp2
HVM guests OS: sles9-sp2

SYSTEM: x460 
RAM: 4GB
CPUs: 8

changeset:   10671:b20580cf7fc1
tag:         tip
user:        kfraser@xxxxxxxxxxxxxxxxxxxxx
date:        Wed Jul 12 10:34:39 2006 +0100
summary:     Revert c/s 10651: "prevent double uuid use". Breaks localhost 


Problem:

HVM domains not being able to boot. "xm dmesg" shows the following messages:

(XEN) c4, This opcode isn't handled yet!
(XEN) handle_mmio: failed to decode instruction
(XEN) mmio opcode: va 0xb8066, gpa 0xb8066, len 4: c4 1e 66 00
(XEN) domain_crash_sync called from platform.c:857
(XEN) Domain 2 (vcpu#0) crashed on cpu#5:
(XEN) ----[ Xen-3.0-unstable    Not tainted ]----
(XEN) CPU:    5
(XEN) RIP:    3435:[<0000000000000f96>]
(XEN) RFLAGS: 0000000000033282   CONTEXT: hvm
(XEN) rax: 0000000000000001   rbx: 0000000000000000   rcx: 000000000000fffe
(XEN) rdx: 0000000000030003   rsi: 000000000000011a   rdi: 0000000000030000
(XEN) rbp: 0000000000000003   rsp: 0000000000001fe0   r8:  0000000000000000
(XEN) r9:  0000000000000000   r10: 0000000000000000   r11: 0000000000000000
(XEN) r12: 0000000000000000   r13: 0000000000000000   r14: 0000000000000000
(XEN) r15: 0000000000000000   cr0: 0000000000050032   cr3: 000000000cbf5000
(XEN) ds: b800   es: 4157   fs: 0000   gs: 0000   ss: 0000   cs: 3435

Problem goes away after setting "cpus=<num>" value in the config file. Khoa
mentioned that it might be a CPU affinity problem.

I get this message no matter what guest OS I try to boot.


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