x86/Xen: swap NX determination and GDT setup on BSP
xen_setup_gdt(), via xen_load_gdt_boot(), wants to adjust page tables. For this to work when NX is not available, x86_configure_nx() needs to be called first. [jgross] Note that this is a revert of 36104cb9 ("x86/xen: Delay get_cpu_cap until stack canary is established"), which is possible now that we no longer support running as PV guest in 32-bit mode. Cc: <stable.vger.kernel.org> # 5.9 Fixes: 36104cb9 ("x86/xen: Delay get_cpu_cap until stack canary is established") Reported-by: Olaf Hering <olaf@aepfle.de> Signed-off-by: Jan Beulich <jbeulich@suse.com> Reviewed-by: Juergen Gross <jgross@suse.com> Link: https://lore.kernel.org/r/12a866b0-9e89-59f7-ebeb-a2a6cec0987a@suse.comSigned-off-by: Juergen Gross <jgross@suse.com>
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