Le 23/12/2018 à 10:31, Segher Boessenkool a écrit :
On Sun, Dec 23, 2018 at 09:29:44AM +0100, Gabriel Paubert wrote:
• The fetch access is to guarded storage and MSR[IR] = 1.
That is architected, yes. You get an ISI if IR=1 and (N=1 or G=1).
If IR=0, mappings don't apply. So in 4xx/ocm, this mapping with
_PAGE_EXEC and _PAGE_GUARDED at the same time seems pointless.
A standard ioremap() should do it (ie without exec), or a non guarded
exec mapping if execution is expected for this area.
Christophe
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