Re: [Qemu-devel] PC machine types switched to SeaBIOS/gPXE

[Alexander Graf]

Anthony Liguori wrote:
> Hi,
>
> I just wanted to let everyone know that I've switched the PC machine
> type to SeaBIOS and gPXE.  SeaBIOS is a port of the Bochs BIOS to GCC,
> by Kevin O'Conner, along with quite a lot of clean up and new feature
> work.
>
> gPXE is the new development tree of etherboot which is now
> deprecated.  We've done a lot of testing of and while there are a few
> outstanding issues, almost everything seems to be working okay.
>
> Some known issues:
> o e1000 pxe booting doesn't seem to work
> o gPXE does not like the slirp tftp server
> o SeaBIOS doesn't support CPU hotplug (not an issue for upstream qemu)
>
> I've renamed the old pcbios to pcbios.bin.  If you suspect a bug in
> SeaBIOS, you can use "-bios pcbios.bin" to try with the old BIOS in an
> effort to debug.
>
> I want to thank everyone who helped make this all happen.  It was a
> big effort and I think it's going to be a really nice feature for the
> 0.12.0 release!
>

-kernel (w/ Linux) breaks.


With SeaBIOS:

EAX=00001000 EBX=00000000 ECX=00000000 EDX=00000000
ESI=00000000 EDI=00000000 EBP=00000000 ESP=00007bae
EIP=00000025 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =1000 00010000 0000ffff 00009300
CS =c900 000c9000 0000ffff 00009b0f
SS =1000 00010000 0000ffff 00009300
DS =0000 00000000 0000ffff 00009300
FS =0000 00000000 0000ffff 00009300
GS =0000 00000000 0000ffff 00009300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     000fcc00 00000037
IDT=     00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=00000000 DR1=00000000 DR2=00000000 DR3=00000000
DR6=ffff0ff0 DR7=00000400
CCS=00000000 CCD=00000000 CCO=EFLAGS 
----------------
IN:
0x00000000000c9025:  mov    %ax,%ds
0x00000000000c9027:  mov    $0x1000,%ax
0x00000000000c902a:  mov    %ax,%fs
0x00000000000c902c:  mov    $0xc1e0,%ax
0x00000000000c902f:  mov    %ax,%gs
0x00000000000c9031:  mov    $0x0,%eax
0x00000000000c9037:  mov    $0x0,%ecx
0x00000000000c903d:  mov    $0x0,%edx
0x00000000000c9043:  mov    $0x0,%ebx
0x00000000000c9049:  mov    $0xfff0,%esp
0x00000000000c904f:  mov    $0x0,%ebp
0x00000000000c9055:  mov    $0x0,%esi
0x00000000000c905b:  mov    $0x0,%edi
0x00000000000c9061:  ljmp   $0x1020,$0x0

EAX=00000000 EBX=00000000 ECX=00000000 EDX=00000000
ESI=00000000 EDI=00000000 EBP=00000000 ESP=0000fff0
EIP=00000000 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =1000 00010000 0000ffff 00009300
CS =1020 00010200 0000ffff 00009b0f
SS =1000 00010000 0000ffff 00009300
DS =1000 00010000 0000ffff 00009300
FS =1000 00010000 0000ffff 00009300
GS =c1e0 000c1e00 0000ffff 00009300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     000fcc00 00000037
IDT=     00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=00000000 DR1=00000000 DR2=00000000 DR3=00000000
DR6=ffff0ff0 DR7=00000400
CCS=00000000 CCD=00000000 CCO=EFLAGS 
----------------
IN:
0x0000000000010200:  add    %al,(%bx,%si)

############################################
############################################
############################################

With BochBIOS:

EAX=00001000 EBX=00008e10 ECX=0009e080 EDX=00000000
ESI=000e0000 EDI=0000fdba EBP=0000fff2 ESP=0000fff8
EIP=00000025 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =1000 00010000 0000ffff 00009300
CS =c900 000c9000 0000ffff 00009b0f
SS =1000 00010000 0000ffff 00009300
DS =0000 00000000 0000ffff 00009300
FS =0000 00000000 0000ffff 00009300
GS =0000 00000000 0000ffff 00009300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     000fb867 00000030
IDT=     00000000 000003ff
CR0=60000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=00000000 DR1=00000000 DR2=00000000 DR3=00000000
DR6=ffff0ff0 DR7=00000400
CCS=00000055 CCD=00000000 CCO=LOGICW 
----------------
IN:
0x00000000000c9025:  mov    %ax,%ds
0x00000000000c9027:  mov    $0x1000,%ax
0x00000000000c902a:  mov    %ax,%fs
0x00000000000c902c:  mov    $0xa1d8,%ax
0x00000000000c902f:  mov    %ax,%gs
0x00000000000c9031:  mov    $0x0,%eax
0x00000000000c9037:  mov    $0x0,%ecx
0x00000000000c903d:  mov    $0x0,%edx
0x00000000000c9043:  mov    $0x0,%ebx
0x00000000000c9049:  mov    $0xfff0,%esp
0x00000000000c904f:  mov    $0x0,%ebp
0x00000000000c9055:  mov    $0x0,%esi
0x00000000000c905b:  mov    $0x0,%edi
0x00000000000c9061:  ljmp   $0x1020,$0x0

EAX=00000000 EBX=00000000 ECX=00000000 EDX=00000000
ESI=00000000 EDI=00000000 EBP=00000000 ESP=0000fff0
EIP=00000000 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =1000 00010000 0000ffff 00009300
CS =1020 00010200 0000ffff 00009b0f
SS =1000 00010000 0000ffff 00009300
DS =1000 00010000 0000ffff 00009300
FS =1000 00010000 0000ffff 00009300
GS =a1d8 000a1d80 0000ffff 00009300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     000fb867 00000030
IDT=     00000000 000003ff
CR0=60000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=00000000 DR1=00000000 DR2=00000000 DR3=00000000
DR6=ffff0ff0 DR7=00000400
CCS=00000055 CCD=00000000 CCO=LOGICW 
----------------
IN:
0x0000000000010200:  jmp    0x10264