Re: [Xen-devel] [V11 PATCH 00/21]PVH xen: Phase I, Version 11 patches...

[George Dunlap <george.dunlap@xxxxxxxxxxxxx>]

On 30/08/13 01:25, Mukesh Rathor wrote:
> On Thu, 29 Aug 2013 17:28:57 +0100
> George Dunlap <george.dunlap@xxxxxxxxxxxxx> wrote:
>
> > On 28/08/13 01:37, Mukesh Rathor wrote:
> > > On Tue, 27 Aug 2013 18:05:00 +0100
> > > George Dunlap <George.Dunlap@xxxxxxxxxxxxx> wrote:
> > >
> > > > On Sat, Aug 24, 2013 at 1:40 AM, Mukesh Rathor
> > > > <mukesh.rathor@xxxxxxxxxx> wrote:
> > > > > On Fri, 23 Aug 2013 13:05:08 +0100
> > > > > "Jan Beulich" <JBeulich@xxxxxxxx> wrote:
> > > > >
> > > > > > > > > On 23.08.13 at 13:15, George Dunlap
> > > > > > > > > <George.Dunlap@xxxxxxxxxxxxx> wrote:
> > > > > > > On Fri, Aug 23, 2013 at 9:49 AM, Jan Beulich <JBeulich@xxxxxxxx>
> > > > > > > wrote:
> > > > > > > > > > > On 23.08.13 at 03:18, Mukesh Rathor
> > > .......
> > > > > > Fine with me, but perhaps Mukesh won't be that happy...
> > > > > It's OK. I'd like this to be merged in asap so I and others can
> > > > > working on the FIXME's right away...
> > > > I'm still waiting on the toolstack changes that are needed to
> > > > actually put it in PVH mode before I can test it.
> > > Also, for V11 you'd need following patch for linux:
> > OK, so I've tried this with your Xen and Linux branches (i.e.,
> > without any of my changes).  Dom0 boots, and the kernel boots as PV,
> > but crashes as PVH:
> >
> > (XEN) PVH currently does not support tsc emulation. Setting
> > timer_mode = native
> > (XEN) PVH currently does not support tsc emulation. Setting
> > timer_mode = native
> > (XEN) grant_table.c:577:d0 remote grant table not yet set
> > up[95984.867796] device vif19.0 entered promiscuous mode
> > [95984.882699] ADDRCONF(NETDEV_UP): vif19.0: link is not ready
> > mapping kernel into physical memory
> > about to get started...
> > <G><2>irq.c:375: Dom19 callback via changed to Direct Vector 0xf3
> > (XEN) PVH: Unhandled trap:0x2 RIP:0xffffffff8101a503
> > (XEN) PVH: [15] exit_reas:0 0 qual:0 0 cr0:0x00000080000039
> > (XEN) PVH: RIP:0xffffffff8101a503 RSP:0xffff88003e1b5dd8 EFLGS:0x12
> > CR3:0x1c0c000
> > (XEN) domain_crash called from pvh.c:487
> > (XEN) Domain 19 (vcpu#0) crashed on cpu#15:
> > (XEN) ----[ Xen-4.4-unstable  x86_64  debug=y  Tainted:    C ]----
> > (XEN) CPU:    15
> > (XEN) RIP:    0000:[<ffffffff8101a503>]
> > (XEN) RFLAGS: 0000000000000012   CONTEXT: hvm guest
> > (XEN) rax: ffffffffff493c7c   rbx: ffffffff81dc0d24   rcx:
> > 00000000000000f0 (XEN) rdx: 0000000000000001   rsi:
> > 0000000000000000   rdi: 0000000000000200 (XEN) rbp:
> > ffff88003e1b5e18   rsp: ffff88003e1b5dd8   r8: 0000000000000000 (XEN)
> > r9:  0000000000000063   r10: 0720072007200720   r11: 0720072007200720
> > (XEN) r12: ffffffff81dc5000   r13: ffff88003e005240   r14:
> > ffffffff817d2b69 (XEN) r15: ffffffff81000000   cr0:
> > 0000000080000039   cr4: 0000000000002660 (XEN) cr3:
> > 0000000001c0c000   cr2: 0000000000000000 (XEN) ds: 0000   es: 0000
> > fs: 0000   gs: 0000   ss: 0000   cs: 0000 (XEN) Guest stack trace
> > from rsp=ffff88003e1b5dd8: (XEN)   Fault while accessing guest
> > memory. [95985.368360] device vif19.0 left promiscuous mode
> You prob have nmi watchdog running... you can just disable it
> for now. The NMI is handled in the caller, so pvh handler needs to just
> ignore it. I'll make a note of that.
Now with multiple vcpus, the guest crashes without any error message:

(XEN) PVH currently does not support tsc emulation. Setting timer_mode = 
native
(XEN) PVH currently does not support tsc emulation. Setting timer_mode = 
native
(XEN) grant_table.c:577:d0 remote grant table not yet set up[ 
158.203543] device vif2.0 entered promiscuous mode^M
[  158.222642] ADDRCONF(NETDEV_UP): vif2.0: link is not ready^M
mapping kernel into physical memory
about to get started...
<G><2>irq.c:375: Dom2 callback via changed to Direct Vector 0xf3
[  158.620609] device vif2.0 left promiscuous mode^M


And if I set it to only one vcpu, it gets stuck in an EPT violation loop:

(XEN) PVH currently does not support tsc emulation. Setting timer_mode = 
native
(XEN) PVH currently does not support tsc emulation. Setting timer_mode = 
native
(XEN) grant_table.c:577:d0 remote grant table not yet set up[ 
283.823609] device vif3.0 entered promiscuous mode^M
[  283.843691] ADDRCONF(NETDEV_UP): vif3.0: link is not ready^M
mapping kernel into physical memory
about to get started...
<G><2>irq.c:375: Dom3 callback via changed to Direct Vector 0xf3
(XEN) EPT violation 0x182 (-w-/---), gpa 0x0000003e22df90, mfn 
0xffffffffffffffff, type 4. RIP:0xffffffff817c6ffd RSP:0xffff88003e22df98
(XEN) p2m-ept.c:638:d3 Walking EPT tables for domain 3 gfn 3e22d
(XEN) p2m-ept.c:657:d3  epte 1c000008295c6007
(XEN) p2m-ept.c:657:d3  epte 1c000008295c5007
(XEN) p2m-ept.c:657:d3  epte 1c00000434c38007
(XEN) p2m-ept.c:657:d3  epte 0
(XEN)  --- GLA 0xffff88003e22df90
(XEN) EPT violation 0x182 (-w-/---), gpa 0x0000003e22df88, mfn 
0xffffffffffffffff, type 4. RIP:0xffffffff817c6ffd RSP:0xffff88003e22df98
(XEN) p2m-ept.c:638:d3 Walking EPT tables for domain 3 gfn 3e22d
(XEN) p2m-ept.c:657:d3  epte 1c000008295c6007
(XEN) p2m-ept.c:657:d3  epte 1c000008295c5007
(XEN) p2m-ept.c:657:d3  epte 1c00000434c38007
(XEN) p2m-ept.c:657:d3  epte 0
(XEN)  --- GLA 0xffff88003e22df88
(XEN) EPT violation 0x182 (-w-/---), gpa 0x0000003e22df88, mfn 
0xffffffffffffffff, type 4. RIP:0xffffffff817c6ffd RSP:0xffff88003e22df98
(XEN) p2m-ept.c:638:d3 Walking EPT tables for domain 3 gfn 3e22d
(XEN) p2m-ept.c:657:d3  epte 1c000008295c6007
(XEN) p2m-ept.c:657:d3  epte 1c000008295c5007
(XEN) p2m-ept.c:657:d3  epte 1c00000434c38007
(XEN) p2m-ept.c:657:d3  epte 0
(XEN)  --- GLA 0xffff88003e22df88
[...]

 -George

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel