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x86/paravirt: Add new features for paravirt patching
For being able to switch paravirt patching from special cased custom code sequences to ALTERNATIVE handling some X86_FEATURE_* are needed as new features. This enables to have the standard indirect pv call as the default code and to patch that with the non-Xen custom code sequence via ALTERNATIVE patching later. Make sure paravirt patching is performed before alternatives patching. Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20210311142319.4723-9-jgross@suse.com
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