On Mon, 2015-05-11 at 17:52 +0800, Li, Zhen-Hua wrote: > Add some functions to copy the data from old kernel. > These functions are used to copy context tables and page tables. > > To avoid calling iounmap between spin_lock_irqsave and > spin_unlock_irqrestore, > use a link here, store the pointers , and then use iounmap to free > them in > another place. > > Li, Zhen-hua: > The functions and logics.
Surely this isn't specific to the Intel IOMMU? Shouldn't it live
elsewhere — either in generic IOMMU code or perhaps in generic kexec
support code?
Don't we need to solve the same kexec problem on *all* platforms with
an IOMMU, and won't they all need something like this?
And I think you're misusing VTD_PAGE_{SHIFT,MASK} when you should be
using the normal PAGE_{SHIFT,MASK}. And shouldn't physical addresses be
phys_addr_t?
--
David Woodhouse Open Source Technology Centre
[email protected] Intel Corporation
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