4 messages in com.xensource.lists.xen-ia64-develRe: [Xen-ia64-devel] vti panic on thash| From | Sent On | Attachments |
|---|---|---|
| Tristan Gingold | 17 Jan 2008 19:26 | |
| Isaku Yamahata | 17 Jan 2008 20:14 | |
| Isaku Yamahata | 17 Jan 2008 21:28 | |
| Tristan Gingold | 17 Jan 2008 22:02 |
| Subject: | Re: [Xen-ia64-devel] vti panic on thash |
|---|---|
| From: | Isaku Yamahata (yama...@valinux.co.jp) |
| Date: | 01/17/2008 09:28:15 PM |
| List: | com.xensource.lists.xen-ia64-devel |
On Fri, Jan 18, 2008 at 01:15:05PM +0900, Isaku Yamahata wrote:
On Fri, Jan 18, 2008 at 04:26:23AM +0100, Tristan Gingold wrote:
Hi,
I got a very strange error:
(XEN) $$$$$ PANIC in domain 2 (k6=0xf0000000079e8000): unknown cause
-2145806064, iip: ffffffff801c6710, ipsr: 501008826030
(XEN) d 0xf000000004108080 domid 2
(XEN) vcpu 0xf0000000079e8000 vcpu 0
(XEN)
(XEN) CPU 0
(XEN) psr : 0000501008826030 ifs : 8000000000000103 ip : [<ffffffff801c6710>]
(XEN) ip is at ???
(XEN) unat: 0000000000000000 pfs : 0000000000000287 rsc : 0000000000000000
(XEN) rnat: 0000000000000000 bsps: fffff80226a521e8 pr : 00000000000254c3
(XEN) ldrs: 0000000001600000 ccv : 000000008281e8c0 fpsr: 0009804c0274433f
(XEN) csd : 0000000000000000 ssd : 0000000000000000
(XEN) b0 : ffffffff80199910 b6 : ffffffff801998b0 b7 : ffffffff802d8480
(XEN) f6 : 1003e0000000000000037 f7 : 1003e0000000000000040
(XEN) f8 : 1003e0000000000000dc0 f9 : 1003e0000000000004000
(XEN) f10 : 1003e0000000000000002 f11 : 1003e0000000000002000
(XEN) r1 : ffffffff82398000 r2 : ffffffff820488e8 r3 : 0000000000000000
This is caused (!) by a thash when pta.vf=1
-2145806064 = 0xffffffff80199910 = b0 value. It seems arch_vmx_struct::cause was overwritten somewhere in virtualization fault path.
vmx_asm_thash seems to be the culprit.
GLOBAL_ENTRY(vmx_asm_thash) ... mov r24=b0 // save b0 ... ld8 r25=[r27] // get vcpu->arch.arch_vmx.vrr[r23]'s value ... // Fall-back to C if VF (long format) is set tbit.nz p6,p0=r17,8 (p6) br.cond.dpnt.many vmx_virtualization_fault_back
The use of r24 and r25 overwrites the cause. Probably other register should be used.
-- yamahata
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