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34 lines
901 B
34 lines
901 B
#include "vmexit.h"
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namespace vmexit
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{
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auto get_command(guest_virt_t command_ptr) -> command_t
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{
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u64 guest_dirbase;
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__vmx_vmread(VMCS_GUEST_CR3, &guest_dirbase);
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// cr3 can contain other high bits so just to be safe
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// get the pfn and bitshift it...
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guest_dirbase = cr3{ guest_dirbase }.pml4_pfn << 12;
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const auto command_page =
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mm::map_guest_virt(guest_dirbase, command_ptr);
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return *reinterpret_cast<command_t*>(command_page);
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}
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auto set_command(guest_virt_t command_ptr, command_t& command_data) -> void
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{
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u64 guest_dirbase;
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__vmx_vmread(VMCS_GUEST_CR3, &guest_dirbase);
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// cr3 can contain other high bits so just to be safe
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// get the pfn and bitshift it...
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guest_dirbase = cr3{ guest_dirbase }.pml4_pfn << 12;
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const auto command_page =
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mm::map_guest_virt(guest_dirbase, command_ptr);
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*reinterpret_cast<command_t*>(command_page) = command_data;
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}
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} |