diff options
Diffstat (limited to 'Kernel/Arch/x86')
| -rw-r--r-- | Kernel/Arch/x86/common/Processor.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Kernel/Arch/x86/common/Processor.cpp b/Kernel/Arch/x86/common/Processor.cpp index a55a7dd4e5..32f038712d 100644 --- a/Kernel/Arch/x86/common/Processor.cpp +++ b/Kernel/Arch/x86/common/Processor.cpp @@ -594,6 +594,14 @@ UNMAP_AFTER_INIT void Processor::cpu_setup() MSR sfmask_msr(MSR_SFMASK); sfmask_msr.set(rflags_mask); #endif + + // Query OS-enabled CPUID features again, and set the flags if needed. + CPUID processor_info(0x1); + if (processor_info.ecx() & (1 << 27)) + m_features |= CPUFeature::OSXSAVE; + CPUID extended_features(0x7); + if (extended_features.ecx() & (1 << 4)) + m_features |= CPUFeature::OSPKE; } UNMAP_AFTER_INIT void Processor::early_initialize(u32 cpu) |