Re: [Xen-devel] Clarifying PVH mode requirements

[Roger Pau Monnà <roger.pau@xxxxxxxxxx>]

El 01/02/16 a les 4.47, PGNet Dev ha escrit:
> In any case, the !st issue, prior to any guest being launched, simply
> adding
> 
>> @ GRUBG cfg
>>
>> -    GRUB_CMDLINE_XEN=" ..."
>> +    GRUB_CMDLINE_XEN=" dom0pvh ..."

Does your kernel support PVH mode (ie: CONFIG_PVH enabled?)

> causes boot fail,
> 
> ...
> (XEN) [2016-01-31 19:28:09] d0v0 EPT violation 0x1aa (-w-/r-x) gpa
> 0x000000f100054c mfn 0xf15
> (XEN) [2016-01-31 19:28:09] d0v0 Walking EPT tables for GFN f1000:
> (XEN) [2016-01-31 19:28:09] d0v0  epte 8000000845108107
> (XEN) [2016-01-31 19:28:09] d0v0  epte 800000085b680107
> (XEN) [2016-01-31 19:28:09] d0v0  epte 8000000844af7107
> (XEN) [2016-01-31 19:28:09] d0v0  epte 80500000f1000905
> (XEN) [2016-01-31 19:28:09] d0v0  --- GLA 0xffffc900006a254c
> (XEN) [2016-01-31 19:28:09] domain_crash called from vmx.c:2685
> (XEN) [2016-01-31 19:28:09] Domain 0 (vcpu#0) crashed on cpu#0:
> (XEN) [2016-01-31 19:28:09] ----[ Xen-4.6.0_08-405  x86_64  debug=n
> Tainted:    C ]----
> (XEN) [2016-01-31 19:28:09] CPU:    0
> (XEN) [2016-01-31 19:28:09] RIP:    0010:[<ffffffff8142a4ac>]
> (XEN) [2016-01-31 19:28:09] RFLAGS: 0000000000010246   CONTEXT: hvm
> guest (d0v0)
> (XEN) [2016-01-31 19:28:09] rax: 000000000000000d   rbx:
> 00000000f100054c   rcx: 000000009e9f
> (XEN) [2016-01-31 19:28:09] rdx: 0000000000000000   rsi:
> 0000000000000100   rdi: ffffffff81e0
> (XEN) [2016-01-31 19:28:09] rbp: ffff880164b57908   rsp:
> ffff880164b578d8   r8:  ffff88016d88
> (XEN) [2016-01-31 19:28:09] r9:  0000000002400001   r10:
> 0000000000000000   r11: 000000000001
> (XEN) [2016-01-31 19:28:09] r12: 0000000000000020   r13:
> ffff88016453aec0   r14: ffffc900006c
> (XEN) [2016-01-31 19:28:09] r15: ffff880164b57a20   cr0:
> 0000000080050033   cr4: 000000000000
> (XEN) [2016-01-31 19:28:09] cr3: 0000000001e0b000   cr2: 0000000000000000
> (XEN) [2016-01-31 19:28:09] ds: 0000   es: 0000   fs: 0000   gs: 0000
> ss: 0000   cs: 0010
> (XEN) [2016-01-31 19:28:09] Guest stack trace from rsp=ffff880164b578d8:
> (XEN) [2016-01-31 19:28:09]   Fault while accessing guest memory.
> (XEN) [2016-01-31 19:28:09] Hardware Dom0 crashed: rebooting machine in
> 5 seconds.
> ...
> 
> Removing the dom0pvh gets me back up & running.

You will have to post the full boot log (Xen + Linux), there's not
enough information here to diagnose the issue.

Roger.


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