Messages in this thread | | | Date | Thu, 30 Aug 2007 16:15:28 +0200 | From | Christian Ehrhardt <> | Subject | New x886-Setup code breaks HVM-XEN boot |
| |
Hi,
I am trying to boot a current 2.6 kernel as a guest under XEN in HVM mode. With linux-2.6.22.(5) as the guest this works fine but current git kernels fail very early in the boot process.
The XEN host is a debian kernel with XEN enabled (2.6.18-4-xen-686). The XEN guest is a vanilla kernel from kernel org booting with LILO 22.6.1 in HVM mode.
I bisected the problem and the bisection points at this commit: | # bad: [4fd06960f120e02e9abc802a09f9511c400042a5] Use the new x86 setup code for i386 | git-bisect bad 4fd06960f120e02e9abc802a09f9511c400042a5
The boot of a current git snapshot fails as follows: bash$ sudo xm console guest LILO 22.6.1 boot: lkcur Loading lkcur......................... BIOS data check bypassed bash$
Note the the xm console command terminates on its own, i.e. the guest machine seems to halt and not hang somewhere.
I could verify that the real mode code up to the assembly code in pmjump.S is in fact executed. The problem appears to occur while enabling protected mode. I tried to put endless loops into the 32-bit setup code but these were apparently not reached. As far as I understand this, the protected mode jump in pmjump.S seems to jump into nowhere.
I am willing to do tests with the XEN guest and send any additional information that might be helpful. However, I cannot change the XEN host at this time.
Any suggestions?
regards Christian - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |