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130 lines
3.6 KiB
130 lines
3.6 KiB
#include "vmxon.hpp"
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namespace vmxon
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{
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auto create_vmxon_region(hv::pvcpu_ctx vcpu_ctx) -> void
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{
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PHYSICAL_ADDRESS mem_range;
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mem_range.QuadPart = ~0ull;
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hv::vmx_basic_msr_t vmx_basic;
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vmx_basic.control = __readmsr(IA32_VMX_BASIC);
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vcpu_ctx->vmxon =
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reinterpret_cast<hv::pvmxon_region_ctx>(
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MmAllocateContiguousMemory(PAGE_SIZE, mem_range));
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vcpu_ctx->vmxon_phys =
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MmGetPhysicalAddress(vcpu_ctx->vmxon).QuadPart;
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RtlSecureZeroMemory(
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vcpu_ctx->vmxon, PAGE_SIZE);
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vcpu_ctx->vmxon->header
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.bits
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.revision_identifier =
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vmx_basic.bits
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.vmcs_revision_identifier;
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}
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auto create_vmcs(hv::pvcpu_ctx vcpu_ctx) -> void
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{
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PHYSICAL_ADDRESS mem_range;
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mem_range.QuadPart = ~0ull;
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hv::vmx_basic_msr_t vmx_basic;
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vmx_basic.control = __readmsr(IA32_VMX_BASIC);
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vcpu_ctx->vmcs =
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reinterpret_cast<hv::pvmcs_ctx>(
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MmAllocateContiguousMemory(PAGE_SIZE, mem_range));
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vcpu_ctx->vmcs_phys =
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MmGetPhysicalAddress(vcpu_ctx->vmcs).QuadPart;
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RtlSecureZeroMemory(
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vcpu_ctx->vmcs, PAGE_SIZE);
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vcpu_ctx->vmcs->header
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.bits
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.revision_identifier =
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vmx_basic.bits
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.vmcs_revision_identifier;
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}
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auto create_vcpus(hv::pvmx_ctx vmx_ctx) -> void
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{
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vmx_ctx->vcpu_num =
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KeQueryActiveProcessorCountEx(
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ALL_PROCESSOR_GROUPS);
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// allocate buffer for vcpu pointers...
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vmx_ctx->vcpus =
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reinterpret_cast<hv::pvcpu_ctx*>(
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ExAllocatePool(NonPagedPool,
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sizeof(hv::pvcpu_ctx) * vmx_ctx->vcpu_num));
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// allocate vcpu for each logical processor along with
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// vmxon region and vmcs memory for each logical processor...
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for (auto idx = 0u; idx < g_vmx_ctx->vcpu_num; ++idx)
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{
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vmx_ctx->vcpus[idx] =
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reinterpret_cast<hv::pvcpu_ctx>(
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ExAllocatePool(NonPagedPool, sizeof hv::vcpu_ctx));
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vmx_ctx->vcpus[idx]->host_stack =
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reinterpret_cast<u64>(
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ExAllocatePool(NonPagedPool,
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PAGE_SIZE * HOST_STACK_PAGES));
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create_vmxon_region(vmx_ctx->vcpus[idx]);
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create_vmcs(vmx_ctx->vcpus[idx]);
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DBG_PRINT("setup vcpu for processor: %d\n", idx);
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DBG_PRINT(" - vmxon region (virtual): 0x%p\n", vmx_ctx->vcpus[idx]->vmxon);
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DBG_PRINT(" - vmxon region (physical): 0x%p\n", vmx_ctx->vcpus[idx]->vmxon_phys);
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DBG_PRINT(" - vmcs (virtual): 0x%p\n", vmx_ctx->vcpus[idx]->vmcs);
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DBG_PRINT(" - vmcs (physical): 0x%p\n", vmx_ctx->vcpus[idx]->vmcs_phys);
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}
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}
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auto init_vmxon() -> void
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{
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hv::ia32_feature_control_msr_t feature_msr = { 0 };
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hv::cr_fixed_t cr_fixed;
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hv::cr0_t cr0 = { 0 };
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hv::cr4_t cr4 = { 0 };
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// should check to see if this is locked or not...
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feature_msr.control = __readmsr(IA32_FEATURE_CONTROL);
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feature_msr.bits.vmxon_outside_smx = true;
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feature_msr.bits.lock = true;
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__writemsr(IA32_FEATURE_CONTROL, feature_msr.control);
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// not sure if did this in the wrong order, i think maybe cr4.vmx_enable bit needs
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// to be flipped before i fixed cr0 and cr4 registers? TODO: read up on dat sheet...
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cr_fixed.all = __readmsr(IA32_VMX_CR0_FIXED0);
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cr0.flags = __readcr0();
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cr0.flags |= cr_fixed.split.low;
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cr_fixed.all = __readmsr(IA32_VMX_CR0_FIXED1);
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cr0.flags &= cr_fixed.split.low;
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__writecr0(cr0.flags);
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cr_fixed.all = __readmsr(IA32_VMX_CR4_FIXED0);
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cr4.flags = __readcr4();
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cr4.flags |= cr_fixed.split.low;
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cr_fixed.all = __readmsr(IA32_VMX_CR4_FIXED1);
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cr4.flags &= cr_fixed.split.low;
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__writecr4(cr4.flags);
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cr4.flags = __readcr4();
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cr4.vmx_enable = true;
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__writecr4(cr4.flags);
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DBG_PRINT("vmxon for processor: %d\n", KeGetCurrentProcessorNumber());
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DBG_PRINT(" - vmxon result (0 == success): %d\n",
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__vmx_on((unsigned long long*)
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&vmxon::g_vmx_ctx->vcpus[
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KeGetCurrentProcessorNumber()]->vmxon_phys));
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}
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} |