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Kernel: Move hypervisor vendor ID string to ProcessorInfo

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This will make it possible to expose it in /proc/cpuinfo. :^)
This commit is contained in:
Linus Groh 2022-04-03 16:58:36 +01:00 • committed by Andreas Kling
commit 8d96525b9d
Notes: sideshowbarker 2024-07-17 14:30:40 +09:00
3 changed files with 31 additions and 21 deletions
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14
Kernel/Arch/x86/common/Processor.cpp
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@ -676,18 +676,10 @@ UNMAP_AFTER_INIT void Processor::initialize(u32 cpu)
UNMAP_AFTER_INIT void Processor::detect_hypervisor()
{
CPUID hypervisor_leaf_range(0x40000000);
auto hypervisor_vendor_id_string = m_info->hypervisor_vendor_id_string();
dmesgln("CPU[{}]: CPUID hypervisor signature '{}' ({:#x} {:#x} {:#x}), max leaf {:#x}", current_id(), hypervisor_vendor_id_string, hypervisor_leaf_range.ebx(), hypervisor_leaf_range.ecx(), hypervisor_leaf_range.edx(), hypervisor_leaf_range.eax());
// Get signature of hypervisor.
alignas(sizeof(u32)) char hypervisor_signature_buffer[13];
*reinterpret_cast<u32*>(hypervisor_signature_buffer) = hypervisor_leaf_range.ebx();
*reinterpret_cast<u32*>(hypervisor_signature_buffer + 4) = hypervisor_leaf_range.ecx();
*reinterpret_cast<u32*>(hypervisor_signature_buffer + 8) = hypervisor_leaf_range.edx();
hypervisor_signature_buffer[12] = '\0';
StringView hypervisor_signature(hypervisor_signature_buffer);
dmesgln("CPU[{}]: CPUID hypervisor signature '{}' ({:#x} {:#x} {:#x}), max leaf {:#x}", current_id(), hypervisor_signature, hypervisor_leaf_range.ebx(), hypervisor_leaf_range.ecx(), hypervisor_leaf_range.edx(), hypervisor_leaf_range.eax());
if (hypervisor_signature == "Microsoft Hv"sv)
if (hypervisor_vendor_id_string == "Microsoft Hv"sv)
detect_hypervisor_hyperv(hypervisor_leaf_range);
}