diff options
Diffstat (limited to 'usr/src/uts/i86pc/os/cpuid.c')
| -rw-r--r-- | usr/src/uts/i86pc/os/cpuid.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/usr/src/uts/i86pc/os/cpuid.c b/usr/src/uts/i86pc/os/cpuid.c index 001fccdc7a..3c9ba0b76d 100644 --- a/usr/src/uts/i86pc/os/cpuid.c +++ b/usr/src/uts/i86pc/os/cpuid.c @@ -883,6 +883,14 @@ cpuid_pass1(cpu_t *cpu) if (cp->cp_edx & CPUID_AMD_EDX_NX) feature |= X86_NX; + /* + * Regardless whether or not we boot 64-bit, + * we should have a way to identify whether + * the CPU is capable of running 64-bit. + */ + if (cp->cp_edx & CPUID_AMD_EDX_LM) + feature |= X86_64; + #if defined(__amd64) /* 1 GB large page - enable only for 64 bit kernel */ if (cp->cp_edx & CPUID_AMD_EDX_1GPG) |