[Xen-devel] Bug at svm.c:712...

["Petersson, Mats" <Mats.Petersson@xxxxxxx>]

Changeset 14402 got me this (not doing anything different than the other
times I've started the same Vista 64 bit image tho'):

I have added a printk to see what seg is at the point of failure (if it
happens again). But perhaps it's obvius from the trace... 

(XEN) Xen BUG at svm.c:712
(XEN) ----[ Xen-3.0-unstable  x86_64  debug=n  Tainted:    C ]----
(XEN) CPU:    1
(XEN) RIP:    e008:[<ffff830000154fa3>]
svm_get_segment_register+0xf3/0x110
(XEN) RFLAGS: 0000000000010212   CONTEXT: hypervisor
(XEN) rax: ffff8300001a4e20   rbx: ffff830010f7331c   rcx:
ffff830000fdf000
(XEN) rdx: ffff830010f7331c   rsi: 0000000000ff7b60   rdi:
ffff8300001c0080
(XEN) rbp: 0000000000000001   rsp: ffff830000ff77f0   r8:
ffff830010f7331c
(XEN) r9:  ffff830000ff7848   r10: 0000000000000000   r11:
000000000024da00
(XEN) r12: 0000000000ff7b60   r13: 0000000000000000   r14:
0000000000000008
(XEN) r15: ffff830000ff7848   cr0: 0000000080050033   cr4:
00000000000006f0
(XEN) cr3: 0000000055a20000   cr2: 000007feff0216a8
(XEN) ds: 0000   es: 0000   fs: 0000   gs: 0000   ss: 0000   cs: e008
(XEN) Xen stack trace from rsp=ffff830000ff77f0:
(XEN)    ffff83000016223e ffff830000ff7cf8 ffff83000016228b
0000000000000001
(XEN)    0000000000000008 ffff830000ff7cf8 ffff830000ff7ad0
0000000000000001
(XEN)    0000000000000000 0000000000000000 ffff8300001665c3
3fd0000010c0f025
(XEN)    0000000000000004 ffff8300001a3c40 0000000000000008
ffff830000ff7cf8
(XEN)    ffff830000141f3a ffff830000ff78e8 ffff830000000049
00000000ffffffff
(XEN)    0000000800000000 000000000013920a ffff830000fdf000
ffff830000ff7f02
(XEN)    ffff830000139667 0000000000000003 ffff83000012f972
ffff8300001a0341
(XEN)    ffff830000fda080 4600000000000296 ffff830000ff7b28
ffff8300001a3c40
(XEN)    00000000000000c3 0000000000000001 ffff830000139667
0000000000000000
(XEN)    ffff83000012f972 ffff8300001a03a0 0000000000000096
ffff8300001c0080
(XEN)    0000000000000092 ffff830000ff7a38 0000000000000046
00000000000000b0
(XEN)    ffff830000138de8 ffff830000ff7f28 ffff83000012cecb
0000000000000002
(XEN)    ffff830000138c0d 0000000000000001 ffff83000012ce9b
ffff830000ff7f28
(XEN)    0000000000000001 fffff80001ce4bed 0000000000000001
ffff830000ff7b57
(XEN)    0000000000000001 fffff98000a25d50 0000000000000000
0000000000000000
(XEN)    0000000000000001 ffff8300001a0ca0 0000000000000000
0000000000000bed
(XEN)    fffff80001ce4bed 0000000000000000 ffff83000016894c
00000000000000b0
(XEN)    0000000000000024 ffff8300001c0080 ffff830000ff7a38
fffff80001ce4bee
(XEN)    00000000000000d2 fffff80001ce4bee 00000000000000ff
ffff830046593000
(XEN)    ffff830046594070 0000000000000000 0000000001ce4067
00000000000465a5
(XEN) Xen call trace:
(XEN)    [<ffff830000154fa3>] svm_get_segment_register+0xf3/0x110
(XEN)    [<ffff83000016223e>] hvm_get_seg_reg+0x3e/0x50
(XEN)    [<ffff83000016228b>] hvm_translate_linear_addr+0x3b/0x140
(XEN)    [<ffff8300001665c3>] hvm_read+0x33/0xc0
(XEN)    [<ffff830000141f3a>] x86_emulate+0x3f3a/0x6fb0
(XEN)    [<ffff830000139667>] pit_overflow+0x17/0x40
(XEN)    [<ffff83000012f972>] do_IRQ+0x1c2/0x1e0
(XEN)    [<ffff830000139667>] pit_overflow+0x17/0x40
(XEN)    [<ffff83000012f972>] do_IRQ+0x1c2/0x1e0
(XEN)    [<ffff830000138de8>] smp_invalidate_interrupt+0x58/0xa0
(XEN)    [<ffff83000012cecb>] invalidate_interrupt+0x2b/0x30
(XEN)    [<ffff830000138c0d>] smp_send_event_check_mask+0x3d/0x50
(XEN)    [<ffff83000012ce9b>] event_check_interrupt+0x2b/0x30
(XEN)    [<ffff83000016894c>] guest_walk_tables+0x18c/0x390
(XEN)    [<ffff83000014f15f>] hpet_read+0xef/0x150
(XEN)    [<ffff83000014b110>] hvm_io_assist+0xa30/0xb20
(XEN)    [<ffff830000166ab1>] shadow_set_l1e+0x171/0x1a0
(XEN)    [<ffff83000016894c>] guest_walk_tables+0x18c/0x390
(XEN)    [<ffff83000016a88e>]
sh_page_fault__shadow_4_guest_4+0xc8e/0xd90
(XEN)    [<ffff83000016894c>] guest_walk_tables+0x18c/0x390
(XEN)    [<ffff83000015594b>] svm_cr_access+0x1cb/0x1250
(XEN)    [<ffff830000157f0a>] svm_vmexit_handler+0x99a/0x1b10
(XEN)    [<ffff83000011a13b>] add_entry+0xcb/0x100
(XEN)    [<ffff83000011a13b>] add_entry+0xcb/0x100
(XEN)    [<ffff830000151148>] vlapic_get_ppr+0x18/0xa0
(XEN)    [<ffff830000151217>] vlapic_has_interrupt+0x47/0x70
(XEN)    [<ffff83000014b894>] is_isa_irq_masked+0x34/0x90
(XEN)    [<ffff830000151200>] vlapic_has_interrupt+0x30/0x70
(XEN)    [<ffff83000014b972>] cpu_has_pending_irq+0x32/0x60
(XEN)    [<ffff83000015a3f5>] svm_stgi_label+0x8/0x13
(XEN)
(XEN)
(XEN) ****************************************
(XEN) Panic on CPU 1:
(XEN) Xen BUG at svm.c:712
(XEN) ****************************************
(XEN)

--
Mats



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