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82434d23f3
paging_prepare() returns a two-quadword structure which lands into RDX:RAX: - Address of the trampoline is returned in RAX. - Non zero RDX means trampoline needs to enable 5-level paging. Document that explicitly. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: dave.hansen@linux.intel.com Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Kyle D Pelton <kyle.d.pelton@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Huang <wei@redhat.com> Cc: x86-ml <x86@kernel.org> Link: https://lkml.kernel.org/r/20190206154756.matwldebbxkmlnae@black.fi.intel.com |
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