path: root/include/xen
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authorJan Beulich <JBeulich@suse.com>2017-12-18 09:37:45 -0700
committerBoris Ostrovsky <boris.ostrovsky@oracle.com>2017-12-19 11:33:25 -0500
commit2cc42bac1c795f75fcc062b95c6ca7ac1b84d5d8 (patch)
tree032d75fffa1848d5780f9b4b47e7ae25c52c6a98 /include/xen
parentxen: XEN_ACPI_PROCESSOR is Dom0-only (diff)
x86-64/Xen: eliminate W+X mappings
A few thousand such pages are usually left around due to the re-use of L1 tables having been provided by the hypervisor (Dom0) or tool stack (DomU). Set NX in the direct map variant, which needs to be done in L2 due to the dual use of the re-used L1s. For x86_configure_nx() to actually do what it is supposed to do, call get_cpu_cap() first. This was broken by commit 4763ed4d45 ("x86, mm: Clean up and simplify NX enablement") when switching away from the direct EFER read. Signed-off-by: Jan Beulich <jbeulich@suse.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Diffstat (limited to 'include/xen')
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