Re: [Xen-devel] Fw: AMD 64 X2 5200 - XEN only detects one core

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

This might be an entirely different issue. Macs are a slightly different
platform from IBM-compatible PC, and have quite different firmware, and that
may affect SMP bringup.

 -- Keir

On 19/12/07 18:06, "Michael Heyse" <mhk@xxxxxxxxxxxxxxxxx> wrote:

> Darryl Bowler schrieb:
>> Xen only detects one of  two cores
> 
> I experience a similar problem on a Intel Core Duo MacBook Pro and
> xen-unstable (3.2-rc2-pre from today). I use the following workaround:
> Boot a standard 2.6.23 kernel (which is able to detect both cores)
> without xen, then use kexec to boot xen with the 2.6.18-xen kernel.
> 
> Sadly I can't post a full `xm dmesg'. The kernel also fails to detect my
> USB harddrive from which I'm booting (booting from USB *does* work when
> I use the above workaround). But here's a screenshot of Xen's boot messages:
> 
> http://www.boppstrasse.de/xen_cpu_fail.jpg
> 
> After the 2.6.23 + kexec trick, when everything is working fine, `xm
> dmesg' looks like this (I have to use noapic, otherwise it won't boot at
> all):
> 
> (XEN) Xen version 3.2.0-rc2-pre (root@xxxxxxxxxxxxxxx) (gcc version
> 4.2.2 (Gentoo 4.2.2 p1.0)) Wed Dec 19 17:59:17 CET 2007
> (XEN) Latest ChangeSet: Wed Dec 19 09:51:35 2007 +0000 16633:7c98b9177b15
> (XEN) Command line: noapic
> (XEN) Video information:
> (XEN)  VGA is text mode 80x25, font 8x16
> (XEN)  VBE/DDC methods: V2; EDID transfer time: 1 seconds
> (XEN) Disc information:
> (XEN)  Found 0 MBR signatures
> (XEN)  Found 2 EDD information structures
> (XEN) Xen-e820 RAM map:
> (XEN)  0000000000000000 - 000000000009fc00 (usable)
> (XEN)  000000000009fc00 - 00000000000a0000 (reserved)
> (XEN)  00000000000ede00 - 0000000000100000 (reserved)
> (XEN)  0000000000100000 - 000000007f0c8000 (usable)
> (XEN)  000000007f0c8000 - 000000007f2c9000 (ACPI NVS)
> (XEN)  000000007f2c9000 - 000000007feb9000 (ACPI data)
> (XEN)  000000007feb9000 - 000000007feef000 (ACPI NVS)
> (XEN)  000000007feef000 - 000000007ff00000 (ACPI data)
> (XEN)  000000007ff00000 - 0000000080000000 (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: 2032MB (2081180kB)
> (XEN) Xen heap: 9MB (10084kB)
> (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) Found and enabled local APIC!
> (XEN) Using scheduler: SMP Credit Scheduler (credit)
> (XEN) Detected 1997.372 MHz processor.
> (XEN) HVM: VMX enabled
> (XEN) CPU0: Intel Genuine Intel(R) CPU           T2500  @ 2.00GHz
> stepping 08
> (XEN) Booting processor 1/1 eip 8c000
> (XEN) CPU1: Intel Genuine Intel(R) CPU           T2500  @ 2.00GHz
> stepping 08
> (XEN) Total of 2 processors activated.
> (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 0xc0100000 -> 0xc04ba4fc
> (XEN) PHYSICAL MEMORY ARRANGEMENT:
> (XEN)  Dom0 alloc.:   000000003f000000->000000003f800000 (479601 pages
> to be allocated)
> (XEN) VIRTUAL MEMORY ARRANGEMENT:
> (XEN)  Loaded kernel: c0100000->c04ba4fc
> (XEN)  Init. ramdisk: c04bb000->c04bb000
> (XEN)  Phys-Mach map: c04bb000->c06915c4
> (XEN)  Start info:    c0692000->c0692474
> (XEN)  Page tables:   c0693000->c069c000
> (XEN)  Boot stack:    c069c000->c069d000
> (XEN)  TOTAL:         c0000000->c0800000
> (XEN)  ENTRY ADDRESS: c0100000
> (XEN) Dom0 has maximum 2 VCPUs
> (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.
> 
> Cheers,
> Michael
> 
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