Re: [PATCH] EFI: Only set regions uncacheable if they support it

[H. Peter Anvin]

On 03/15/2012 06:56 AM, Matthew Garrett wrote:
> The EFI memory region attributes field indicates whether the region can
> be mapped with various cache attributes. Our current implementation always
> marks regions uncacheable if they don't have the writeback support flag.
> This causes us to mark some regions uncacheable even if they don't
> indicate support for being uncacheable, triggering a clflush that may cause
> an MCE. Ensure we only do this for regions which support it.
> 
> Signed-off-by: Matthew Garrett <mjg@xxxxxxxxxx>

Could you be specific as to what you're seeing in the field?  In
particular, what *do* these memory regions claim to support?

	-hpa

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