From: Kirill A. Shutemov Date: Thu, 9 Mar 2017 14:24:02 +0000 (+0300) Subject: x86/cpufeature: Add 5-level paging detection X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=6fb895692a034393d58679cd8d00c9e229719a5f;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git 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 Acked-by: Michal Hocko Signed-off-by: Linus Torvalds --- diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h index 4e7772387c6e..b04bb6dfed7f 100644 --- a/arch/x86/include/asm/cpufeatures.h +++ b/arch/x86/include/asm/cpufeatures.h @@ -289,7 +289,8 @@ #define X86_FEATURE_PKU (16*32+ 3) /* Protection Keys for Userspace */ #define X86_FEATURE_OSPKE (16*32+ 4) /* OS Protection Keys Enable */ #define X86_FEATURE_AVX512_VPOPCNTDQ (16*32+14) /* POPCNT for vectors of DW/QW */ -#define X86_FEATURE_RDPID (16*32+ 22) /* RDPID instruction */ +#define X86_FEATURE_LA57 (16*32+16) /* 5-level page tables */ +#define X86_FEATURE_RDPID (16*32+22) /* RDPID instruction */ /* AMD-defined CPU features, CPUID level 0x80000007 (ebx), word 17 */ #define X86_FEATURE_OVERFLOW_RECOV (17*32+0) /* MCA overflow recovery support */