Messages in this thread | | | Date | Thu, 15 Mar 2012 07:00:06 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH] EFI: Only set regions uncacheable if they support it |
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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@redhat.com>
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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