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x86/cpufeature: Add 5-level paging detection
Look for 'la57' in /proc/cpuinfo to see if your machine supports 5-level paging. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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#define X86_FEATURE_PKU (16*32+ 3) /* Protection Keys for Userspace */
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#define X86_FEATURE_OSPKE (16*32+ 4) /* OS Protection Keys Enable */
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#define X86_FEATURE_AVX512_VPOPCNTDQ (16*32+14) /* POPCNT for vectors of DW/QW */
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#define X86_FEATURE_RDPID (16*32+ 22) /* RDPID instruction */
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#define X86_FEATURE_LA57 (16*32+16) /* 5-level page tables */
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#define X86_FEATURE_RDPID (16*32+22) /* RDPID instruction */
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/* AMD-defined CPU features, CPUID level 0x80000007 (ebx), word 17 */
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#define X86_FEATURE_OVERFLOW_RECOV (17*32+0) /* MCA overflow recovery support */
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