xen/debug: WARN_ON when identity PFN has no _PAGE_IOMAP flag set.

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Only enabled if XEN_DEBUG is enabled. We print a warning
when:

 pfn_to_mfn(pfn) == pfn, but no VM_IO (_PAGE_IOMAP) flag set
	(and pfn is an identity mapped pfn)
 pfn_to_mfn(pfn) != pfn, and VM_IO flag is set.
	(ditto, pfn is an identity mapped pfn)

[v2: Make it dependent on CONFIG_XEN_DEBUG instead of ..DEBUG_FS]
[v3: Fix compiler warning]

Reviewed-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

...

This commit is contained in:

Konrad Rzeszutek Wilk 2010-12-23 16:25:29 -05:00

parent 2222e71bd6

commit fc25151d9a

2 changed files with 46 additions and 0 deletions

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8

arch/x86/xen/Kconfig

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38

arch/x86/xen/mmu.c

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