mirror of
https://github.com/subhobhai943/SUB-OS.git
synced 2026-10-25 16:52:29 +00:00
65 lines
2.3 KiB
C
65 lines
2.3 KiB
C
#include <virt/virt.h>
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#include <virt/virtio.h>
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#include <arch/x86_64/cpuid.h>
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#include <lib/string.h>
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#include <kernel/printk.h>
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static hypervisor_info_t host_hypervisor;
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void virt_init(void) {
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memset(&host_hypervisor, 0, sizeof(host_hypervisor));
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// Check CPUID hypervisor feature bit (ECX bit 31 on leaf 1)
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uint32_t eax, ebx, ecx, edx;
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cpuid(1, &eax, &ebx, &ecx, &edx);
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if (ecx & (1U << 31)) {
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// Hypervisor present, query leaf 0x40000000
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cpuid(0x40000000, &eax, &ebx, &ecx, &edx);
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char sig[13];
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memcpy(sig, &ebx, 4);
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memcpy(sig + 4, &ecx, 4);
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memcpy(sig + 8, &edx, 4);
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sig[12] = '\0';
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strncpy(host_hypervisor.signature, sig, sizeof(host_hypervisor.signature) - 1);
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if (strcmp(sig, "KVMKVMKVM\0\0\0") == 0 || strstr(sig, "KVM") != NULL) {
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host_hypervisor.type = HYPERVISOR_KVM;
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strcpy(host_hypervisor.name, "Linux KVM / QEMU");
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} else if (strcmp(sig, "TCGTCGTCGTCG") == 0) {
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host_hypervisor.type = HYPERVISOR_QEMU;
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strcpy(host_hypervisor.name, "QEMU TCG Engine");
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} else if (strcmp(sig, "VMwareVMware") == 0) {
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host_hypervisor.type = HYPERVISOR_VMWARE;
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strcpy(host_hypervisor.name, "VMware ESXi / Workstation");
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} else if (strcmp(sig, "VBoxVBoxVBox") == 0) {
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host_hypervisor.type = HYPERVISOR_VBOX;
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strcpy(host_hypervisor.name, "Oracle VirtualBox");
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} else if (strcmp(sig, "Microsoft Hv") == 0) {
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host_hypervisor.type = HYPERVISOR_HYPERV;
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strcpy(host_hypervisor.name, "Microsoft Hyper-V");
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} else {
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host_hypervisor.type = HYPERVISOR_UNKNOWN;
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strcpy(host_hypervisor.name, "Generic Hypervisor");
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}
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printk(KERN_INFO "VIRT: Detected Hypervisor: %s (Signature: '%s')\n",
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host_hypervisor.name, host_hypervisor.signature);
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} else {
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host_hypervisor.type = HYPERVISOR_NONE;
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strcpy(host_hypervisor.name, "Bare Metal x86_64 Machine");
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printk(KERN_INFO "VIRT: Running on physical Bare Metal x86_64 hardware\n");
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}
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virtio_init();
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}
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const hypervisor_info_t* virt_get_hypervisor_info(void) {
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return &host_hypervisor;
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}
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bool virt_is_virtualized(void) {
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return host_hypervisor.type != HYPERVISOR_NONE;
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}
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