Hi,
On 02/10/17 18:31, Julien Grall wrote:
Currently, it is not possible to specify the permission of a new
mapping. It would be necessary to use the function modify_xen_mappings
with a different set of flags.
Introduce a couple of new flags for the permissions (Non-eXecutable,
Read-Only) and also provides definition that combine the memory attribute
and permission for common combinations.
PAGE_HYPERVISOR is now an alias to PAGE_HYPERVISOR_RW (read-write,
non-executable mappings). This does not affect the current mapping using
PAGE_HYPERVISOR because Xen is currently forcing all the mapping to be
non-executable by default (see mfn_to_xen_entry).
A follow-up patch will change modify_xen_mappings to use the new flags.
Signed-off-by: Julien Grall <julien.gr...@arm.com>
During the week-end, I spotted a potential issue with set_fixmap. Indeed
set_fixmap is supposed to take a memory attribute in parameter. However,
some callers seem to mix the use of PAGE_* and direct attributes...
I will resend this series with set_fixmap fixed.
Cheers,
--
Julien Grall
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