Re: [Xen-devel] Doamin crash when trying to install disk encryption (PointSec) on Windows HVM

[Tom Rotenberg <tom.rotenberg@xxxxxxxxx>]

Keir,

I have tried your latest patch, and it looks like now it passes the emulation problem. However,  now the domain crashes with the following error:

(XEN) HVM1: Booting from 0000:7c00
(XEN) Failed vm entry (exit reason 0x80000021) caused by invalid guest state (0).
(XEN) ************* VMCS Area **************
(XEN) *** Guest State ***
(XEN) CR0: actual=0x0000000080010039, shadow=0x0000000080000019, gh_mask=ffffffffffffffff
(XEN) CR4: actual=0x0000000000002060, shadow=0x0000000000000000, gh_mask=ffffffffffffffff
(XEN) CR3: actual=0x000000000a213a20, target_count=0
(XEN)      target0=0000000000000000, target1=0000000000000000
(XEN)      target2=0000000000000000, target3=0000000000000000
(XEN) RSP = 0x0000000000000080 (0x0000000000000080)  RIP = 0x000000000000002a (0x000000000000002a)
(XEN) RFLAGS=0x0000000000023202 (0x0000000000023202)  DR7 = 0x0000000000000400
(XEN) Sysenter RSP=0000000000000000 CS:RIP=0000:0000000000000000
(XEN) CS: sel=0x0060, attr=0x0c09b, limit=0xffffffff, base=0x0000000000200000
(XEN) DS: sel=0x0068, attr=0x0c093, limit=0xffffffff, base=0x0000000000200000
(XEN) SS: sel=0x0070, attr=0x0c093, limit=0xfc000fff, base=0x000000000020ba62
(XEN) ES: sel=0x0068, attr=0x0c093, limit=0xffffffff, base=0x0000000000200000
(XEN) FS: sel=0x0068, attr=0x0c093, limit=0xffffffff, base=0x0000000000200000
(XEN) GS: sel=0x0068, attr=0x0c093, limit=0xffffffff, base=0x0000000000200000
(XEN) GDTR:                           limit=0x00001dd8, base=0x0000000000200000
(XEN) LDTR: sel=0x0000, attr=0x1c000, limit=0xffffffff, base=0x0000000000000000
(XEN) IDTR:                           limit=0x00000188, base=0x0000000000201df0
(XEN) TR: sel=0x0058, attr=0x0008b, limit=0x0000ffff, base=0x0000000000201ff2
(XEN) Guest PAT = 0x0000000000000000
(XEN) TSC Offset = ffffffe4920110b7
(XEN) DebugCtl=0000000000000000 DebugExceptions=0000000000000000
(XEN) Interruptibility=0001 ActivityState=0000
(XEN) *** Host State ***
(XEN) RSP = 0xffff83007e4f7fa0  RIP = 0xffff828c8019aa20
(XEN) CS=e008 DS=0000 ES=0000 FS=0000 GS=0000 SS=0000 TR=e040
(XEN) FSBase=0000000000000000 GSBase=0000000000000000 TRBase=ffff828c802a8b00
(XEN) GDTBase=ffff83007e9a3000 IDTBase=ffff83007e62e010
(XEN) CR0=0000000080050033 CR3=000000007cfdc000 CR4=00000000000026f0
(XEN) Sysenter RSP=ffff83007e4f7fd0 CS:RIP=e008:ffff828c801c7290
(XEN) Host PAT = 0x0000000000000000
(XEN) *** Control State ***
(XEN) PinBased=0000003f CPUBased=b6a1e7fe SecondaryExec=00000041
(XEN) EntryControls=000011ff ExitControls=0003efff
(XEN) ExceptionBitmap=00044080
(XEN) VMEntry: intr_info=80000b0b errcode=00001eac ilen=00000000
(XEN) VMExit: intr_info=00000000 errcode=00008000 ilen=00000000
(XEN)         reason=80000021 qualification=00000000
(XEN) IDTVectoring: info=00000000 errcode=00000000
(XEN) TPR Threshold = 0x00
(XEN) EPT pointer = 0x0000000000000000
(XEN) Virtual processor ID = 0x0000
(XEN) **************************************
(XEN) domain_crash called from vmx.c:2218
(XEN) Domain 1 (vcpu#0) crashed on cpu#1:
(XEN) ----[ Xen-3.4.0-rc3-pre  x86_64  debug=n  Not tainted ]----
(XEN) CPU:    1
(XEN) RIP:    0060:[<000000000000002a>]
(XEN) RFLAGS: 0000000000023202   CONTEXT: hvm guest
(XEN) rax: 0000000000000007   rbx: 0000000000001490   rcx: 0000000000000000
(XEN) rdx: 0000000000001da8   rsi: 0000000000000000   rdi: 0000000000000000
(XEN) rbp: 0000000000008ebf   rsp: 0000000000000080   r8:  0000000000000000
(XEN) r9:  0000000000000000   r10: 0000000000000000   r11: 0000000000000000
(XEN) r12: 0000000000000000   r13: 0000000000000000   r14: 0000000000000000
(XEN) r15: 0000000000000000   cr0: 0000000080000019   cr4: 0000000000000000
(XEN) cr3: 0000000001443000   cr2: 0000000000000000
(XEN) ds: 0068   es: 0068   fs: 0068   gs: 0068   ss: 0070   cs: 0060

Could it be, that the real mode emulation code has a bug? What does this error means?

Tom

2009/4/22 Keir Fraser <keir.fraser@xxxxxxxxxxxxx>

On 22/04/2009 12:18, "Tom Rotenberg" <tom.rotenberg@xxxxxxxxx> wrote:

> Keir,
>
> I have applied your patch, and it seemed to work. However, the domain still
> crashes, and now it looks like it's because of the 'LTR' instruction.

Try the attached patch. It replaces the one I sent last time, and emulates
both LLDT and LTR.

 -- Keir

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