[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Xen-devel] [PATCH 0 of 6] Fix kexec in Xen (take 3)



This set of patches is designed to get the kexec path working again on Xen 4.x

kdump kernels can't boot if x2apic mode is enabled and the ACPI tables dont 
state this fact.  They also cant boot at all with interrupt remapping enabled.

These patches cause xen to track the BSP local APIC boot state and return to it 
before kexec'ing to a new kernel.  It also makes sure to disable IO 
virtualisation.

One area which is problematic is disabling interrupt remapping.  
lapic_suspend() calls iommu_disable_x2apic_IR() which in a previous thread was 
deemed to be Intel specific and only works by chance on AMD boxes by effectivly 
being a NOP.  As lapic_suspend() is generic code, does this mean that we 
can't/don't ever disable interrupt remapping on AMD boxes?

Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel


 


Rackspace

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.