XEN_PHYSICAL_MASK   31 arch/x86/include/asm/xen/page.h #define XEN_PHYSICAL_MASK	__sme_clr((1UL << 52) - 1)
XEN_PHYSICAL_MASK   33 arch/x86/include/asm/xen/page.h #define XEN_PHYSICAL_MASK	__PHYSICAL_MASK