9:37 p.m.
Kevin O'Connor wrote:
Some versions of Bochs don't like the MTRR initialization, so add
Which versions don't?
Sebastian
3:14 a.m.
New subject: [PATCH] Add config option to disable MTRR initialization.
On Mon, Mar 07, 2011 at 09:37:59PM +0100, Sebastian Herbszt wrote:
Kevin O'Connor wrote:
>Some versions of Bochs don't like the MTRR initialization, so add
Which versions don't?
I ran into it with the version fc14 has - Bochs v2.4.5. I get:
00034041578i[CPU0 ] 0x01fe28e9>> wrmsr : 0F30
00034041578e[CPU0 ] exception(): 3rd (13) exception with no resolution, shutdown status is
00h, resetting
00034041578i[SYS ] bx_pc_system_c::Reset(HARDWARE) called
00034041578i[CPU0 ] cpu hardware reset
and then the boot restarts. The issue goes away if I disable the MTRR
init.
-Kevin
10:50 p.m.
New subject: [PATCH] Add config option to disable MTRR initialization.
Kevin O'Connor wrote:
On Mon, Mar 07, 2011 at 09:37:59PM +0100, Sebastian Herbszt wrote:
> Kevin O'Connor wrote:
> >Some versions of Bochs don't like the MTRR initialization, so add
>
> Which versions don't?
I ran into it with the version fc14 has - Bochs v2.4.5. I get:
00034041578i[CPU0 ] 0x01fe28e9>> wrmsr : 0F30
00034041578e[CPU0 ] exception(): 3rd (13) exception with no resolution, shutdown status
is 00h, resetting
00034041578i[SYS ] bx_pc_system_c::Reset(HARDWARE) called
00034041578i[CPU0 ] cpu hardware reset
and then the boot restarts. The issue goes away if I disable the MTRR
init.
-Kevin
Can you please post your "cpuid" lines from your bochsrc file and the CPU
configuration related
lines from the top of the bochsout.txt file?
Sebastian
3:33 p.m.
New subject: [PATCH] Add config option to disable MTRR initialization.
On Thu, Mar 10, 2011 at 10:50:30PM +0100, Sebastian Herbszt wrote:
Kevin O'Connor wrote:
>On Mon, Mar 07, 2011 at 09:37:59PM +0100, Sebastian Herbszt wrote:
>>Kevin O'Connor wrote:
>>>Some versions of Bochs don't like the MTRR initialization, so add
>I ran into it with the version fc14 has - Bochs v2.4.5. I get:
>
>00034041578i[CPU0 ] 0x01fe28e9>> wrmsr : 0F30
>00034041578e[CPU0 ] exception(): 3rd (13) exception with no resolution, shutdown
status is 00h, resetting
>00034041578i[SYS ] bx_pc_system_c::Reset(HARDWARE) called
>00034041578i[CPU0 ] cpu hardware reset
>
>and then the boot restarts. The issue goes away if I disable the MTRR
>init.
Can you please post your "cpuid" lines from your bochsrc file and
the CPU configuration related lines from the top of the bochsout.txt
file?
I don't have a bochsrc - I just run:
bochs -q 'floppya: 1_44=odin1440.img, status=inserted' 'romimage:
file=../seabios/out/bios.bin'
and then select option '6'. Below is the system config output:
00000000000i[ ] Bochs x86 Emulator 2.4.5.cvs
00000000000i[ ] Build from CVS snapshot, after release 2.4.5
00000000000i[ ] System configuration
00000000000i[ ] processors: 1 (cores=1, HT threads=1)
00000000000i[ ] A20 line support: yes
00000000000i[ ] CPU configuration
00000000000i[ ] level: 6
00000000000i[ ] SMP support: no
00000000000i[ ] APIC support: yes
00000000000i[ ] FPU support: yes
00000000000i[ ] MMX support: yes
00000000000i[ ] 3dnow! support: yes
00000000000i[ ] SEP support: yes
00000000000i[ ] SSE support: sse2
00000000000i[ ] XSAVE support: no
00000000000i[ ] AES support: no
00000000000i[ ] MOVBE support: no
00000000000i[ ] x86-64 support: no
00000000000i[ ] MWAIT support: no
00000000000i[ ] VMX support: no
-Kevin
11:22 p.m.
New subject: [PATCH] Add config option to disable MTRR initialization.
Kevin O'Connor wrote:
On Thu, Mar 10, 2011 at 10:50:30PM +0100, Sebastian Herbszt wrote:
> Kevin O'Connor wrote:
> >On Mon, Mar 07, 2011 at 09:37:59PM +0100, Sebastian Herbszt wrote:
> >>Kevin O'Connor wrote:
> >>>Some versions of Bochs don't like the MTRR initialization, so add
> >I ran into it with the version fc14 has - Bochs v2.4.5. I get:
> >
> >00034041578i[CPU0 ] 0x01fe28e9>> wrmsr : 0F30
> >00034041578e[CPU0 ] exception(): 3rd (13) exception with no resolution, shutdown
status is 00h, resetting
> >00034041578i[SYS ] bx_pc_system_c::Reset(HARDWARE) called
> >00034041578i[CPU0 ] cpu hardware reset
> >
> >and then the boot restarts. The issue goes away if I disable the MTRR
> >init.
> Can you please post your "cpuid" lines from your bochsrc file and
> the CPU configuration related lines from the top of the bochsout.txt
> file?
I don't have a bochsrc - I just run:
bochs -q 'floppya: 1_44=odin1440.img, status=inserted' 'romimage:
file=../seabios/out/bios.bin'
and then select option '6'. Below is the system config output:
00000000000i[ ] Bochs x86 Emulator 2.4.5.cvs
00000000000i[ ] Build from CVS snapshot, after release 2.4.5
00000000000i[ ] System configuration
00000000000i[ ] processors: 1 (cores=1, HT threads=1)
00000000000i[ ] A20 line support: yes
00000000000i[ ] CPU configuration
00000000000i[ ] level: 6
00000000000i[ ] SMP support: no
00000000000i[ ] APIC support: yes
00000000000i[ ] FPU support: yes
00000000000i[ ] MMX support: yes
00000000000i[ ] 3dnow! support: yes
00000000000i[ ] SEP support: yes
00000000000i[ ] SSE support: sse2
00000000000i[ ] XSAVE support: no
00000000000i[ ] AES support: no
00000000000i[ ] MOVBE support: no
00000000000i[ ] x86-64 support: no
00000000000i[ ] MWAIT support: no
00000000000i[ ] VMX support: no
-Kevin
Stanislav, you happen to know why WRMSR is not recognized here?
Sebastian
1:29 a.m.
New subject: [PATCH] Add config option to disable MTRRinitialization.
Sebastian Herbszt wrote:
]>> >00034041578i[CPU0 ] 0x01fe28e9>> wrmsr : 0F30
]>> >00034041578e[CPU0 ] exception(): 3rd (13) exception with no resolution,
shutdown status is 00h,
]
]Stanislav, you happen to know why WRMSR is not recognized here?
]
]Sebastian
If it works like real hardware, it is exception 6 that would tell you the
instruction is not supporteed, not exception 13. Exception 13h during MTRR
initialization is most often because of too many mask bits set when writing
the mask part of a variable MTRR pair (ecx=201,203,...20Fh). Software
should call cpuid function 80000008h to find out how many bits can safely be
set in the variable MTRR mask. Setting reserved bits in the fixed MTRRs
might also be able to cause a GP fault.
Thanks,
Scott
11:29 p.m.
New subject: [PATCH] Add config option to disable MTRRinitialization.
Sebastian Herbszt wrote:
Kevin O'Connor wrote:
> On Thu, Mar 10, 2011 at 10:50:30PM +0100, Sebastian Herbszt wrote:
>> Kevin O'Connor wrote:
>> >On Mon, Mar 07, 2011 at 09:37:59PM +0100, Sebastian Herbszt wrote:
>> >>Kevin O'Connor wrote:
>> >>>Some versions of Bochs don't like the MTRR initialization, so
add
>> >I ran into it with the version fc14 has - Bochs v2.4.5. I get:
>> >
>> >00034041578i[CPU0 ] 0x01fe28e9>> wrmsr : 0F30
>> >00034041578e[CPU0 ] exception(): 3rd (13) exception with no resolution,
shutdown status is 00h, resetting
>> >00034041578i[SYS ] bx_pc_system_c::Reset(HARDWARE) called
>> >00034041578i[CPU0 ] cpu hardware reset
>> >
>> >and then the boot restarts. The issue goes away if I disable the MTRR
>> >init.
>> Can you please post your "cpuid" lines from your bochsrc file and
>> the CPU configuration related lines from the top of the bochsout.txt
>> file?
>
> I don't have a bochsrc - I just run:
>
> bochs -q 'floppya: 1_44=odin1440.img, status=inserted' 'romimage:
file=../seabios/out/bios.bin'
>
> and then select option '6'. Below is the system config output:
>
> 00000000000i[ ] Bochs x86 Emulator 2.4.5.cvs
> 00000000000i[ ] Build from CVS snapshot, after release 2.4.5
> 00000000000i[ ] System configuration
> 00000000000i[ ] processors: 1 (cores=1, HT threads=1)
> 00000000000i[ ] A20 line support: yes
> 00000000000i[ ] CPU configuration
> 00000000000i[ ] level: 6
> 00000000000i[ ] SMP support: no
> 00000000000i[ ] APIC support: yes
> 00000000000i[ ] FPU support: yes
> 00000000000i[ ] MMX support: yes
> 00000000000i[ ] 3dnow! support: yes
> 00000000000i[ ] SEP support: yes
> 00000000000i[ ] SSE support: sse2
> 00000000000i[ ] XSAVE support: no
> 00000000000i[ ] AES support: no
> 00000000000i[ ] MOVBE support: no
> 00000000000i[ ] x86-64 support: no
> 00000000000i[ ] MWAIT support: no
> 00000000000i[ ] VMX support: no
>
> -Kevin
Stanislav, you happen to know why WRMSR is not recognized here?
I was now able to reproduce it:
00000449408i[BIOS ] init mtrr
00023940129e[CPU0 ] WRMSR[0x00000201]: attempt to write invalid phy addr to variable range
MTRR 0000000f:e0000800
00023940129e[CPU0 ] interrupt(): vector must be within IDT table limits, IDT.limit = 0x0
00023940129e[CPU0 ] interrupt(): vector must be within IDT table limits, IDT.limit = 0x0
00023940129i[CPU0 ] CPU is in protected mode (active)
00023940129i[CPU0 ] CS.d_b = 32 bit
00023940129i[CPU0 ] SS.d_b = 32 bit
00023940129i[CPU0 ] | EAX=e0000800 EBX=00000201 ECX=00000201 EDX=0000000f
00023940129i[CPU0 ] | ESP=00006eec EBP=00000008 ESI=0000000f EDI=00000210
00023940129i[CPU0 ] | IOPL=0 id vip vif ac vm RF nt of df if tf sf zf af pf cf
00023940129i[CPU0 ] | SEG selector base limit G D
00023940129i[CPU0 ] | SEG sltr(index|ti|rpl) base limit G D
00023940129i[CPU0 ] | CS:0008( 0001| 0| 0) 00000000 ffffffff 1 1
00023940129i[CPU0 ] | DS:0010( 0002| 0| 0) 00000000 ffffffff 1 1
00023940129i[CPU0 ] | SS:0010( 0002| 0| 0) 00000000 ffffffff 1 1
00023940129i[CPU0 ] | ES:0010( 0002| 0| 0) 00000000 ffffffff 1 1
00023940129i[CPU0 ] | FS:0010( 0002| 0| 0) 00000000 ffffffff 1 1
00023940129i[CPU0 ] | GS:0010( 0002| 0| 0) 00000000 ffffffff 1 1
00023940129i[CPU0 ] | EIP=01fe1bd2 (01fe1bd2)
00023940129i[CPU0 ] | CR0=0x00000011 CR2=0x00000000
00023940129i[CPU0 ] | CR3=0x00000000 CR4=0x00000000
00023940129i[CPU0 ] 0x01fe1bd2>> wrmsr : 0F30
00023940129e[CPU0 ] exception(): 3rd (13) exception with no resolution, shutdown status is
00h, resetting
It happens because your Bochs 2.4.5 version was compiled without x86-64 support and
--enable-long-phy-address
and only supports 32-bit phys_bits. You can recompile it or upgrade to 2.4.6 to fix this.
Sebastian
2:13 a.m.
New subject: [PATCH] Add config option to disable MTRRinitialization.
On Tue, Mar 15, 2011 at 11:29:21PM +0100, Sebastian Herbszt wrote:
I was now able to reproduce it:
[...]
It happens because your Bochs 2.4.5 version was compiled without
x86-64 support and --enable-long-phy-address and only supports
32-bit phys_bits. You can recompile it or upgrade to 2.4.6 to fix
this.
It sounds like SeaBIOS should be able to detect this at runtime and
apply the right mask. The mtrr code in seabios came from Bochs BIOS -
which I think was just for kvm. So, maybe just some tweaks are needed
here.
-Kevin
11:34 p.m.
New subject: [PATCH] Add config option to disable MTRRinitialization.
Kevin O'Connor wrote:
On Tue, Mar 15, 2011 at 11:29:21PM +0100, Sebastian Herbszt wrote:
> I was now able to reproduce it:
[...]
> It happens because your Bochs 2.4.5 version was compiled without
> x86-64 support and --enable-long-phy-address and only supports
> 32-bit phys_bits. You can recompile it or upgrade to 2.4.6 to fix
> this.
It sounds like SeaBIOS should be able to detect this at runtime and
apply the right mask. The mtrr code in seabios came from Bochs BIOS -
which I think was just for kvm. So, maybe just some tweaks are needed
here.
-Kevin
A Bochs CPU level 6 processor should support 36 bits. SeaBIOS assumes
this and sets phys_bits to 36. If CPUID leaf 0x80000008 is available this assumption
is modified and the supplied value is used. The Bochs CPU code suggests this leaf is
only available on 64-bit CPUs.
If you compile Bochs 2.4.5 without --enable-long-phy-address the valid 36 bit
assumption is violated and you get a family 6 CPU with only 32 bits.
I don't think trying to fix the detection is worth it, because the problem disappears
with
Bochs version 2.4.6 or --enable-long-phy-address on older versions.
Sebastian
3047
days inactive
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8 comments
3 participants
participants (3)
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Kevin O'Connor -
Scott Duplichan -
Sebastian Herbszt