Re: [Xen-devel] Bisected Xen-unstable: "Segment register inaccessible for d1v0" when starting HVM guest on intel

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

Monday, June 30, 2014, 5:45:40 PM, you wrote:

>>>> On 28.06.14 at 22:21, <linux@xxxxxxxxxxxxxx> wrote:
>> On intel machines when starting a HVM guest with qemu upstream i get:
>> 
>> (d2) [2014-06-27 20:07:46] Booting from Hard Disk...
>> (d2) [2014-06-27 20:07:46] Booting from 0000:7c00
>> (XEN) [2014-06-27 20:08:00] irq.c:380: Dom1 callback via changed to Direct 
>> Vector 0xf3
>> (XEN) [2014-06-27 20:08:00] irq.c:380: Dom2 callback via changed to Direct 
>> Vector 0xf3
>> (XEN) [2014-06-27 20:08:03] Segment register inaccessible for d1v0
>> (XEN) [2014-06-27 20:08:03] (If you see this outside of debugging activity, 
>> please report to xen-devel@xxxxxxxxxxxxxxxxxxxx)

> Could you put a dump_execution_state() alongside the respective
> printk(), so we can see one what path(s) this is actually happening?

> Thanks, Jan

Hi Jan,

Sure see below (complete xl-dmesg attached)

--
Sander

(XEN) [2014-06-30 16:33:12] irq.c:380: Dom2 callback via changed to Direct 
Vector 0xf3
(XEN) [2014-06-30 16:33:14] Segment register inaccessible for d2v0
(XEN) [2014-06-30 16:33:14] (If you see this outside of debugging activity, 
please report to xen-devel@xxxxxxxxxxxxxxxxxxxx)
(XEN) [2014-06-30 16:33:14] ----[ Xen-4.5-unstable  x86_64  debug=y  Not 
tainted ]----
(XEN) [2014-06-30 16:33:14] CPU:    2
(XEN) [2014-06-30 16:33:14] RIP:    e008:[<ffff82d0801dc9c5>] 
vmx_get_segment_register+0x4d/0x422
(XEN) [2014-06-30 16:33:14] RFLAGS: 0000000000010286   CONTEXT: hypervisor
(XEN) [2014-06-30 16:33:14] rax: 0000000000000000   rbx: ffff830218537b18   
rcx: 0000000000000000
(XEN) [2014-06-30 16:33:14] rdx: ffff83021853c020   rsi: 000000000000000a   
rdi: ffff82d08028f6c0
(XEN) [2014-06-30 16:33:14] rbp: ffff830218537ad0   rsp: ffff830218537a90   r8: 
 ffff830218588000
(XEN) [2014-06-30 16:33:14] r9:  0000000000000002   r10: 000000000000000e   
r11: 0000000000000002
(XEN) [2014-06-30 16:33:14] r12: ffff8300dc8f8000   r13: 0000000000000001   
r14: 00000000007ff000
(XEN) [2014-06-30 16:33:14] r15: 00000000f5f1f880   cr0: 000000008005003b   
cr4: 00000000001526f0
(XEN) [2014-06-30 16:33:14] cr3: 0000000215c7b000   cr2: 00000000ffc35000
(XEN) [2014-06-30 16:33:14] ds: 0000   es: 0000   fs: 0000   gs: 0000   ss: 
0000   cs: e008
(XEN) [2014-06-30 16:33:14] Xen stack trace from rsp=ffff830218537a90:
(XEN) [2014-06-30 16:33:14]    000000000000177f 0000000000000000 
ffff830218537af0 ffff830218537ba8
(XEN) [2014-06-30 16:33:14]    ffff8300dc8f8000 0000000000000003 
00000000007ff000 00000000f5f1f880
(XEN) [2014-06-30 16:33:14]    ffff830218537b60 ffff82d0801f4415 
ffff830218537b2c ffff830209dd8000
(XEN) [2014-06-30 16:33:14]    ffff830218537b60 ffff83020a5e2930 
ffff830218530000 007ff00300209fc7
(XEN) [2014-06-30 16:33:14]    ffff830209dd8000 0000000318537b48 
ffff82d0801eeb08 0000000700000000
(XEN) [2014-06-30 16:33:14]    0000000000000001 ffff83020a5e2930 
ffff82e0041eafe0 000000000020f57f
(XEN) [2014-06-30 16:33:14]    ffff830218537ccc 000000000177f000 
ffff830218537c10 ffff82d0802204a8
(XEN) [2014-06-30 16:33:14]    ffff83020f57f000 ffff830218537cf4 
ffff83020f57f000 0000000000000000
(XEN) [2014-06-30 16:33:14]    00000000f5f1f880 ffff8300dc8f8000 
ffff830218537c00 00000000f5f1f880
(XEN) [2014-06-30 16:33:14]    0000000000000000 0000000000000000 
0000000000000000 0000000000000000
(XEN) [2014-06-30 16:33:14]    0000000000000000 0000000000000082 
0000000215d8d000 ffff8300dc8f8000
(XEN) [2014-06-30 16:33:14]    ffff830218537ccc ffff82d080281200 
ffff83020a5e2930 00000000f5f1f880
(XEN) [2014-06-30 16:33:14]    ffff830218537c20 ffff82d08022062e 
ffff830218537c80 ffff82d0801ec215
(XEN) [2014-06-30 16:33:14]    ffff830218537c60 ffff82d080129c6a 
ffff8300db453000 ffff83021853ce50
(XEN) [2014-06-30 16:33:14]    0000000000000000 00000000000f5f1f 
ffff8300dbdf7000 000000000000002c
(XEN) [2014-06-30 16:33:14]    ffff83021853c068 ffff8300dc8f8000 
ffff830218537d10 ffff82d0801ba88d
(XEN) [2014-06-30 16:33:14]    ffff830218537d60 ffff830218530000 
00000005802f7f00 ffff830218537d70
(XEN) [2014-06-30 16:33:14]    ffff830218537d54 00000000f5f1f880 
0000000000000880 000000030000002c
(XEN) [2014-06-30 16:33:14]    ffff830218537ce0 ffff82d080184208 
ffff830218537d50 000000000000002c
(XEN) [2014-06-30 16:33:14]    ffff8300dbdf7000 0000000000000002 
ffff83021853c068 0000000000000001
(XEN) [2014-06-30 16:33:14] Xen call trace:
(XEN) [2014-06-30 16:33:14]    [<ffff82d0801dc9c5>] 
vmx_get_segment_register+0x4d/0x422
(XEN) [2014-06-30 16:33:14]    [<ffff82d0801f4415>] 
guest_walk_tables_3_levels+0x189/0x520
(XEN) [2014-06-30 16:33:14]    [<ffff82d0802204a8>] 
hap_p2m_ga_to_gfn_3_levels+0x158/0x2c2
(XEN) [2014-06-30 16:33:14]    [<ffff82d08022062e>] 
hap_gva_to_gfn_3_levels+0x1c/0x1e
(XEN) [2014-06-30 16:33:14]    [<ffff82d0801ec215>] paging_gva_to_gfn+0xb8/0xce
(XEN) [2014-06-30 16:33:14]    [<ffff82d0801ba88d>] __hvm_copy+0x87/0x354
(XEN) [2014-06-30 16:33:14]    [<ffff82d0801bac7c>] 
hvm_copy_to_guest_virt_nofault+0x1e/0x20
(XEN) [2014-06-30 16:33:14]    [<ffff82d0801bace5>] copy_to_user_hvm+0x67/0x87
(XEN) [2014-06-30 16:33:14]    [<ffff82d08016237c>] 
update_runstate_area+0x98/0xfb
(XEN) [2014-06-30 16:33:14]    [<ffff82d0801623f0>] 
_update_runstate_area+0x11/0x39
(XEN) [2014-06-30 16:33:14]    [<ffff82d0801634db>] context_switch+0x10c3/0x10fa
(XEN) [2014-06-30 16:33:14]    [<ffff82d080126a19>] schedule+0x5a8/0x5da
(XEN) [2014-06-30 16:33:14]    [<ffff82d0801297f9>] __do_softirq+0x81/0x8c
(XEN) [2014-06-30 16:33:14]    [<ffff82d080129852>] do_softirq+0x13/0x15
(XEN) [2014-06-30 16:33:14]    [<ffff82d08015f70a>] idle_loop+0x67/0x77
(XEN) [2014-06-30 16:33:14] 
(XEN) [2014-06-30 16:33:15] irq.c:270: Dom2 PCI link 0 changed 5 -> 0
(XEN) [2014-06-30 16:33:15] irq.c:270: Dom2 PCI link 1 changed 10 -> 0
(XEN) [2014-06-30 16:33:15] irq.c:270: Dom2 PCI link 2 changed 11 -> 0
(XEN) [2014-06-30 16:33:15] irq.c:270: Dom2 PCI link 3 changed 5 -> 0
(XEN) [2014-06-30 16:33:37] grant_table.c:295:d0v0 Increased maptrack size to 2 
frames
(XEN) [2014-06-30 16:33:37] grant_table.c:295:d0v0 Increased maptrack size to 3 
frames

Attachment: xl-dmesg.txt
Description: Text document

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