* Xen unstable fails to boot from cold on i386 core duo
@ 2007-12-17 15:42 Daniel P. Berrange
2007-12-18 0:00 ` Daniel P. Berrange
0 siblings, 1 reply; 4+ messages in thread
From: Daniel P. Berrange @ 2007-12-17 15:42 UTC (permalink / raw)
To: xen-devel
[-- Attachment #1: Type: text/plain, Size: 1012 bytes --]
Just testing xen-unstable on some of my machines here. I've got a failure
to boot on a Mac Mini with a i386 Core Duo cpu.
If I try to boot xen-unstable changeset 16606 from cold it will immediately
crash with this:
http://people.redhat.com/berrange/xen-3.2.0-fail.jpg
Sorry for lame camera pic - this being a mac mini there's no serial card,
or even ability to add one in :-(
If I boot into Xen 3.1.0 it works fine. If I warm-reboot from Xen 3.1.0
into Xen-unstable changeset 16606 it also works fine. So it seems only the
boot from cold is problematic.
Attaching the 'xm dmesg' output from a succesfull warm-reboot into
xen-unstable, and the CPU info.
Any ideas / suggestions ?
Dan.
--
|=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=|
|=- Perl modules: http://search.cpan.org/~danberr/ -=|
|=- Projects: http://freshmeat.net/~danielpb/ -=|
|=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=|
[-- Attachment #2: hv.log --]
[-- Type: text/plain, Size: 3685 bytes --]
__ __ _____ ____ ___ ____
\ \/ /___ _ __ |___ / |___ \ / _ \ _ __ ___|___ \ _ __ _ __ ___
\ // _ \ '_ \ |_ \ __) || | | |__| '__/ __| __) |__| '_ \| '__/ _ \
/ \ __/ | | | ___) | / __/ | |_| |__| | | (__ / __/|__| |_) | | | __/
/_/\_\___|_| |_| |____(_)_____(_)___/ |_| \___|_____| | .__/|_| \___|
|_|
(XEN) Xen version 3.2.0-rc2-pre (berrange@home.berrange.com) (gcc version 4.1.2 20070925 (Red Hat 4.1.2-33)) Sat Dec 15 13:05:31 EST 2007
(XEN) Latest ChangeSet: unavailable
(XEN) Command line:
(XEN) Video information:
(XEN) VGA is text mode 80x25, font 8x16
(XEN) VBE/DDC methods: none; EDID transfer time: 0 seconds
(XEN) EDID info not retrieved because no DDC retrieval method detected
(XEN) Disc information:
(XEN) Found 1 MBR signatures
(XEN) Found 1 EDD information structures
(XEN) Xen-e820 RAM map:
(XEN) 0000000000000000 - 000000000009fc00 (usable)
(XEN) 000000000009fc00 - 00000000000a0000 (reserved)
(XEN) 00000000000ede00 - 0000000000100000 (reserved)
(XEN) 0000000000100000 - 000000003e0d5000 (usable)
(XEN) 000000003e0d5000 - 000000003e2d6000 (ACPI NVS)
(XEN) 000000003e2d6000 - 000000003eebf000 (ACPI data)
(XEN) 000000003eebf000 - 000000003eeef000 (ACPI NVS)
(XEN) 000000003eeef000 - 000000003ef00000 (ACPI data)
(XEN) 000000003ef00000 - 0000000040000000 (reserved)
(XEN) 00000000e0000000 - 00000000f0000000 (reserved)
(XEN) 00000000fec00000 - 00000000fec01000 (reserved)
(XEN) 00000000fed14000 - 00000000fed1a000 (reserved)
(XEN) 00000000fed1c000 - 00000000fed20000 (reserved)
(XEN) 00000000fee00000 - 00000000fee01000 (reserved)
(XEN) 00000000ffe00000 - 0000000100000000 (reserved)
(XEN) System RAM: 992MB (1016272kB)
(XEN) Xen heap: 9MB (10080kB)
(XEN) Domain heap initialised: DMA width 32 bits
(XEN) PAE enabled, limit: 16 GB
(XEN) Processor #0 6:14 APIC version 20
(XEN) Processor #1 6:14 APIC version 20
(XEN) IOAPIC[0]: apic_id 1, version 32, address 0xfec00000, GSI 0-23
(XEN) Enabling APIC mode: Flat. Using 1 I/O APICs
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Detected 1833.347 MHz processor.
(XEN) HVM: VMX enabled
(XEN) CPU0: Intel Genuine Intel(R) CPU 1400 @ 1.83GHz stepping 08
(XEN) Booting processor 1/1 eip 8c000
(XEN) CPU1: Intel Genuine Intel(R) CPU 1400 @ 1.83GHz stepping 08
(XEN) Total of 2 processors activated.
(XEN) ENABLING IO-APIC IRQs
(XEN) -> Using new ACK method
(XEN) Platform timer overflows in 14998 jiffies.
(XEN) Platform timer is 14.318MHz HPET
(XEN) Brought up 2 CPUs
(XEN) AMD IOMMU: Disabled
(XEN) *** LOADING DOMAIN 0 ***
(XEN) Xen kernel: 32-bit, PAE, lsb
(XEN) Dom0 kernel: 32-bit, PAE, lsb, paddr 0xc1000000 -> 0xc1401000
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN) Dom0 alloc.: 000000003a000000->000000003c000000 (225331 pages to be allocated)
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN) Loaded kernel: c1000000->c1401000
(XEN) Init. ramdisk: c1401000->c1c61800
(XEN) Phys-Mach map: c1c62000->c1d460cc
(XEN) Start info: c1d47000->c1d47474
(XEN) Page tables: c1d48000->c1d5d000
(XEN) Boot stack: c1d5d000->c1d5e000
(XEN) TOTAL: c0000000->c2000000
(XEN) ENTRY ADDRESS: c1000000
(XEN) Dom0 has maximum 2 VCPUs
(XEN) Initrd len 0x860800, start at 0xc1401000
(XEN) Scrubbing Free RAM: done.
(XEN) Xen trace buffers: disabled
(XEN) Std. Loglevel: Errors and warnings
(XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings)
(XEN) Xen is relinquishing VGA console.
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to Xen)
(XEN) Freed 96kB init memory.
[-- Attachment #3: cpu.log --]
[-- Type: text/plain, Size: 971 bytes --]
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 14
model name : Genuine Intel(R) CPU 1400 @ 1.83GHz
stepping : 8
cpu MHz : 1833.347
cache size : 2048 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 6
wp : yes
flags : fpu de tsc msr pae mce cx8 apic mtrr mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc pni monitor vmx est tm2 xtpr
bogomips : 3668.66
clflush size : 64
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 14
model name : Genuine Intel(R) CPU 1400 @ 1.83GHz
stepping : 8
cpu MHz : 1833.347
cache size : 2048 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 6
wp : yes
flags : fpu de tsc msr pae mce cx8 apic mtrr mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc up pni monitor vmx est tm2 xtpr
bogomips : 3668.66
clflush size : 64
[-- Attachment #4: Type: text/plain, Size: 138 bytes --]
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: Xen unstable fails to boot from cold on i386 core duo
2007-12-17 15:42 Xen unstable fails to boot from cold on i386 core duo Daniel P. Berrange
@ 2007-12-18 0:00 ` Daniel P. Berrange
2007-12-18 2:03 ` Daniel P. Berrange
0 siblings, 1 reply; 4+ messages in thread
From: Daniel P. Berrange @ 2007-12-18 0:00 UTC (permalink / raw)
To: xen-devel
On Mon, Dec 17, 2007 at 03:42:21PM +0000, Daniel P. Berrange wrote:
> Just testing xen-unstable on some of my machines here. I've got a failure
> to boot on a Mac Mini with a i386 Core Duo cpu.
>
> If I try to boot xen-unstable changeset 16606 from cold it will immediately
> crash with this:
>
> http://people.redhat.com/berrange/xen-3.2.0-fail.jpg
>
> Sorry for lame camera pic - this being a mac mini there's no serial card,
> or even ability to add one in :-(
>
> If I boot into Xen 3.1.0 it works fine. If I warm-reboot from Xen 3.1.0
> into Xen-unstable changeset 16606 it also works fine. So it seems only the
> boot from cold is problematic.
>
> Attaching the 'xm dmesg' output from a succesfull warm-reboot into
> xen-unstable, and the CPU info.
>
> Any ideas / suggestions ?
Converting ff16420d / vmx_cpu_up+0x25d address into a line number with
eu-addr2line, it appears as if Xen is crashing & burning in the 'wrmsr'
call in the 2nd half of this conditional from arch/x86/hvm/vmx/vmcs.c:
if ( eax & IA32_FEATURE_CONTROL_MSR_LOCK )
{
if ( !(eax & (IA32_FEATURE_CONTROL_MSR_ENABLE_VMXON_OUTSIDE_SMX |
IA32_FEATURE_CONTROL_MSR_ENABLE_VMXON_INSIDE_SMX)) )
{
printk("CPU%d: VMX disabled by BIOS.\n", cpu);
return 0;
}
}
else
{
eax = (IA32_FEATURE_CONTROL_MSR_LOCK |
IA32_FEATURE_CONTROL_MSR_ENABLE_VMXON_OUTSIDE_SMX |
IA32_FEATURE_CONTROL_MSR_ENABLE_VMXON_INSIDE_SMX);
wrmsr(IA32_FEATURE_CONTROL_MSR, eax, 0);
}
In Xen 3.1.0 (which works for me), the 'vmx_cpu_up' method does not exist,
but the 'start_vmx' function which does more of less the same thing
writes a slightly different msr:
if ( eax & IA32_FEATURE_CONTROL_MSR_LOCK )
{
if ( (eax & IA32_FEATURE_CONTROL_MSR_ENABLE_VMXON) == 0x0 )
{
printk("VMX disabled by Feature Control MSR.\n");
return 0;
}
}
else
{
wrmsr(IA32_FEATURE_CONTROL_MSR,
IA32_FEATURE_CONTROL_MSR_LOCK |
IA32_FEATURE_CONTROL_MSR_ENABLE_VMXON, 0);
}
I guess this explains why Xen-unstable works if I warm re-boot from xen-3.1.0,
because the 3.1.0 hypervisor will have already enabled and lock VMX msr.
Is it possible that older CPUs / BIOS don't play nice with the extra bit
IA32_FEATURE_CONTROL_MSR_ENABLE_VMXON_INSIDE_SMX
...if they don't have SMX support ?
Regards,
Dan.
--
|=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=|
|=- Perl modules: http://search.cpan.org/~danberr/ -=|
|=- Projects: http://freshmeat.net/~danielpb/ -=|
|=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=|
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: Xen unstable fails to boot from cold on i386 core duo
2007-12-18 0:00 ` Daniel P. Berrange
@ 2007-12-18 2:03 ` Daniel P. Berrange
2007-12-19 15:51 ` Keir Fraser
0 siblings, 1 reply; 4+ messages in thread
From: Daniel P. Berrange @ 2007-12-18 2:03 UTC (permalink / raw)
To: xen-devel
On Tue, Dec 18, 2007 at 12:00:57AM +0000, Daniel P. Berrange wrote:
> Converting ff16420d / vmx_cpu_up+0x25d address into a line number with
> eu-addr2line, it appears as if Xen is crashing & burning in the 'wrmsr'
> call in the 2nd half of this conditional from arch/x86/hvm/vmx/vmcs.c:
>
> if ( eax & IA32_FEATURE_CONTROL_MSR_LOCK )
> {
> if ( !(eax & (IA32_FEATURE_CONTROL_MSR_ENABLE_VMXON_OUTSIDE_SMX |
> IA32_FEATURE_CONTROL_MSR_ENABLE_VMXON_INSIDE_SMX)) )
> {
> printk("CPU%d: VMX disabled by BIOS.\n", cpu);
> return 0;
> }
> }
> else
> {
> eax = (IA32_FEATURE_CONTROL_MSR_LOCK |
> IA32_FEATURE_CONTROL_MSR_ENABLE_VMXON_OUTSIDE_SMX |
> IA32_FEATURE_CONTROL_MSR_ENABLE_VMXON_INSIDE_SMX);
> wrmsr(IA32_FEATURE_CONTROL_MSR, eax, 0);
> }
[snip]
> Is it possible that older CPUs / BIOS don't play nice with the extra bit
>
> IA32_FEATURE_CONTROL_MSR_ENABLE_VMXON_INSIDE_SMX
>
> ...if they don't have SMX support ?
I have confirmed that if I modify Xen with this patch:
--- xen-unstable-16606.orig/xen/arch/x86/hvm/vmx/vmcs.c 2007-12-13 04:31:03.000000000 -0500
+++ xen-unstable-16606/xen/arch/x86/hvm/vmx/vmcs.c 2007-12-17 20:21:43.000000000 -0500
@@ -265,8 +265,7 @@ int vmx_cpu_up(void)
if ( eax & IA32_FEATURE_CONTROL_MSR_LOCK )
{
- if ( !(eax & (IA32_FEATURE_CONTROL_MSR_ENABLE_VMXON_OUTSIDE_SMX |
- IA32_FEATURE_CONTROL_MSR_ENABLE_VMXON_INSIDE_SMX)) )
+ if ( !(eax & (IA32_FEATURE_CONTROL_MSR_ENABLE_VMXON_OUTSIDE_SMX)))
{
printk("CPU%d: VMX disabled by BIOS.\n", cpu);
return 0;
@@ -275,8 +274,7 @@ int vmx_cpu_up(void)
else
{
eax = (IA32_FEATURE_CONTROL_MSR_LOCK |
- IA32_FEATURE_CONTROL_MSR_ENABLE_VMXON_OUTSIDE_SMX |
- IA32_FEATURE_CONTROL_MSR_ENABLE_VMXON_INSIDE_SMX);
+ IA32_FEATURE_CONTROL_MSR_ENABLE_VMXON_OUTSIDE_SMX);
wrmsr(IA32_FEATURE_CONTROL_MSR, eax, 0);
}
Everything works nicely again. Obviously this patch will break stuff
related to SMX so a better solution is required by somebody with the
knowledge in this area....
Regards,
Dan.
--
|=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=|
|=- Perl modules: http://search.cpan.org/~danberr/ -=|
|=- Projects: http://freshmeat.net/~danielpb/ -=|
|=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=|
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2007-12-19 15:51 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2007-12-17 15:42 Xen unstable fails to boot from cold on i386 core duo Daniel P. Berrange
2007-12-18 0:00 ` Daniel P. Berrange
2007-12-18 2:03 ` Daniel P. Berrange
2007-12-19 15:51 ` Keir Fraser
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.
