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Re: [Xen-devel] [PATCH v5 10/17] xen/arm: map_regions_rw_cache: Map the region with p2m->default_access



(CC Tamas)

On 06/07/16 11:43, Stefano Stabellini wrote:
On Tue, 28 Jun 2016, Julien Grall wrote:
The parameter 'access' is used by memaccess to restrict temporarily the
permission. This parameter should not be used for other purpose (such
as restricting permanently the permission).

The type p2m_mmio_direct will map the region Read-Write and
non-executable. Note that this is already the current behavior with the
combination of the type and the access. So there is no functional
change.

Signed-off-by: Julien Grall <julien.grall@xxxxxxx>

I could be mistaken, but isn't default_access actually p2m_access_rwx?

By default, the access is p2m_access_rwx. However this can be changed by memaccess and the new default value is stored in arch->p2m.default_access. I have CCed Tamas to confirm that.

Note that this is how the other calls are done.

Regards,

--
Julien Grall

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