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Kernel: Add support for hypervisor CPUID feature

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This commit is contained in:
Jean-Baptiste Boric 2021-07-11 19:08:27 +02:00 • committed by Andreas Kling
parent bee75c1f24
commit 4cc346fb19
2 changed files with 5 additions and 0 deletions
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1
Kernel/Arch/x86/CPUID.h
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@ -54,6 +54,7 @@ enum class CPUFeature : u32 {
AVX = (1 << 22), AVX = (1 << 22),
FXSR = (1 << 23), FXSR = (1 << 23),
LM = (1 << 24), LM = (1 << 24),
HYPERVISOR = (1 << 25),
}; };
} }

4
Kernel/Arch/x86/common/Processor.cpp
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@ -93,6 +93,8 @@ UNMAP_AFTER_INIT void Processor::cpu_detect()
set_feature(CPUFeature::AVX); set_feature(CPUFeature::AVX);
if (processor_info.ecx() & (1 << 30)) if (processor_info.ecx() & (1 << 30))
set_feature(CPUFeature::RDRAND); set_feature(CPUFeature::RDRAND);
if (processor_info.ecx() & (1u << 31))
set_feature(CPUFeature::HYPERVISOR);
if (processor_info.edx() & (1 << 11)) { if (processor_info.edx() & (1 << 11)) {
u32 stepping = processor_info.eax() & 0xf; u32 stepping = processor_info.eax() & 0xf;
u32 model = (processor_info.eax() >> 4) & 0xf; u32 model = (processor_info.eax() >> 4) & 0xf;
@ -266,6 +268,8 @@ String Processor::features_string() const
return "avx"; return "avx";
case CPUFeature::LM: case CPUFeature::LM:
return "lm"; return "lm";
case CPUFeature::HYPERVISOR:
return "hypervisor";
// no default statement here intentionally so that we get // no default statement here intentionally so that we get
// a warning if a new feature is forgotten to be added here // a warning if a new feature is forgotten to be added here
} }