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436 lines
14 KiB
436 lines
14 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __KVM_X86_VMX_VMCS12_H |
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#define __KVM_X86_VMX_VMCS12_H |
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#include <linux/build_bug.h> |
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#include "vmcs.h" |
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/* |
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* struct vmcs12 describes the state that our guest hypervisor (L1) keeps for a |
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* single nested guest (L2), hence the name vmcs12. Any VMX implementation has |
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* a VMCS structure, and vmcs12 is our emulated VMX's VMCS. This structure is |
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* stored in guest memory specified by VMPTRLD, but is opaque to the guest, |
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* which must access it using VMREAD/VMWRITE/VMCLEAR instructions. |
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* More than one of these structures may exist, if L1 runs multiple L2 guests. |
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* nested_vmx_run() will use the data here to build the vmcs02: a VMCS for the |
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* underlying hardware which will be used to run L2. |
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* This structure is packed to ensure that its layout is identical across |
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* machines (necessary for live migration). |
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* |
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* IMPORTANT: Changing the layout of existing fields in this structure |
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* will break save/restore compatibility with older kvm releases. When |
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* adding new fields, either use space in the reserved padding* arrays |
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* or add the new fields to the end of the structure. |
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*/ |
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typedef u64 natural_width; |
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struct __packed vmcs12 { |
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/* According to the Intel spec, a VMCS region must start with the |
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* following two fields. Then follow implementation-specific data. |
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*/ |
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struct vmcs_hdr hdr; |
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u32 abort; |
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u32 launch_state; /* set to 0 by VMCLEAR, to 1 by VMLAUNCH */ |
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u32 padding[7]; /* room for future expansion */ |
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u64 io_bitmap_a; |
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u64 io_bitmap_b; |
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u64 msr_bitmap; |
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u64 vm_exit_msr_store_addr; |
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u64 vm_exit_msr_load_addr; |
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u64 vm_entry_msr_load_addr; |
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u64 tsc_offset; |
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u64 virtual_apic_page_addr; |
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u64 apic_access_addr; |
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u64 posted_intr_desc_addr; |
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u64 ept_pointer; |
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u64 eoi_exit_bitmap0; |
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u64 eoi_exit_bitmap1; |
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u64 eoi_exit_bitmap2; |
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u64 eoi_exit_bitmap3; |
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u64 xss_exit_bitmap; |
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u64 guest_physical_address; |
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u64 vmcs_link_pointer; |
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u64 guest_ia32_debugctl; |
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u64 guest_ia32_pat; |
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u64 guest_ia32_efer; |
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u64 guest_ia32_perf_global_ctrl; |
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u64 guest_pdptr0; |
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u64 guest_pdptr1; |
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u64 guest_pdptr2; |
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u64 guest_pdptr3; |
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u64 guest_bndcfgs; |
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u64 host_ia32_pat; |
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u64 host_ia32_efer; |
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u64 host_ia32_perf_global_ctrl; |
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u64 vmread_bitmap; |
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u64 vmwrite_bitmap; |
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u64 vm_function_control; |
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u64 eptp_list_address; |
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u64 pml_address; |
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u64 padding64[3]; /* room for future expansion */ |
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/* |
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* To allow migration of L1 (complete with its L2 guests) between |
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* machines of different natural widths (32 or 64 bit), we cannot have |
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* unsigned long fields with no explicit size. We use u64 (aliased |
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* natural_width) instead. Luckily, x86 is little-endian. |
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*/ |
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natural_width cr0_guest_host_mask; |
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natural_width cr4_guest_host_mask; |
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natural_width cr0_read_shadow; |
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natural_width cr4_read_shadow; |
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natural_width dead_space[4]; /* Last remnants of cr3_target_value[0-3]. */ |
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natural_width exit_qualification; |
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natural_width guest_linear_address; |
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natural_width guest_cr0; |
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natural_width guest_cr3; |
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natural_width guest_cr4; |
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natural_width guest_es_base; |
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natural_width guest_cs_base; |
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natural_width guest_ss_base; |
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natural_width guest_ds_base; |
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natural_width guest_fs_base; |
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natural_width guest_gs_base; |
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natural_width guest_ldtr_base; |
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natural_width guest_tr_base; |
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natural_width guest_gdtr_base; |
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natural_width guest_idtr_base; |
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natural_width guest_dr7; |
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natural_width guest_rsp; |
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natural_width guest_rip; |
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natural_width guest_rflags; |
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natural_width guest_pending_dbg_exceptions; |
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natural_width guest_sysenter_esp; |
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natural_width guest_sysenter_eip; |
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natural_width host_cr0; |
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natural_width host_cr3; |
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natural_width host_cr4; |
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natural_width host_fs_base; |
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natural_width host_gs_base; |
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natural_width host_tr_base; |
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natural_width host_gdtr_base; |
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natural_width host_idtr_base; |
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natural_width host_ia32_sysenter_esp; |
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natural_width host_ia32_sysenter_eip; |
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natural_width host_rsp; |
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natural_width host_rip; |
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natural_width paddingl[8]; /* room for future expansion */ |
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u32 pin_based_vm_exec_control; |
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u32 cpu_based_vm_exec_control; |
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u32 exception_bitmap; |
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u32 page_fault_error_code_mask; |
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u32 page_fault_error_code_match; |
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u32 cr3_target_count; |
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u32 vm_exit_controls; |
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u32 vm_exit_msr_store_count; |
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u32 vm_exit_msr_load_count; |
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u32 vm_entry_controls; |
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u32 vm_entry_msr_load_count; |
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u32 vm_entry_intr_info_field; |
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u32 vm_entry_exception_error_code; |
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u32 vm_entry_instruction_len; |
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u32 tpr_threshold; |
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u32 secondary_vm_exec_control; |
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u32 vm_instruction_error; |
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u32 vm_exit_reason; |
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u32 vm_exit_intr_info; |
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u32 vm_exit_intr_error_code; |
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u32 idt_vectoring_info_field; |
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u32 idt_vectoring_error_code; |
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u32 vm_exit_instruction_len; |
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u32 vmx_instruction_info; |
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u32 guest_es_limit; |
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u32 guest_cs_limit; |
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u32 guest_ss_limit; |
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u32 guest_ds_limit; |
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u32 guest_fs_limit; |
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u32 guest_gs_limit; |
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u32 guest_ldtr_limit; |
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u32 guest_tr_limit; |
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u32 guest_gdtr_limit; |
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u32 guest_idtr_limit; |
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u32 guest_es_ar_bytes; |
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u32 guest_cs_ar_bytes; |
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u32 guest_ss_ar_bytes; |
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u32 guest_ds_ar_bytes; |
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u32 guest_fs_ar_bytes; |
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u32 guest_gs_ar_bytes; |
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u32 guest_ldtr_ar_bytes; |
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u32 guest_tr_ar_bytes; |
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u32 guest_interruptibility_info; |
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u32 guest_activity_state; |
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u32 guest_sysenter_cs; |
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u32 host_ia32_sysenter_cs; |
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u32 vmx_preemption_timer_value; |
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u32 padding32[7]; /* room for future expansion */ |
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u16 virtual_processor_id; |
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u16 posted_intr_nv; |
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u16 guest_es_selector; |
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u16 guest_cs_selector; |
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u16 guest_ss_selector; |
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u16 guest_ds_selector; |
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u16 guest_fs_selector; |
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u16 guest_gs_selector; |
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u16 guest_ldtr_selector; |
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u16 guest_tr_selector; |
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u16 guest_intr_status; |
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u16 host_es_selector; |
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u16 host_cs_selector; |
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u16 host_ss_selector; |
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u16 host_ds_selector; |
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u16 host_fs_selector; |
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u16 host_gs_selector; |
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u16 host_tr_selector; |
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u16 guest_pml_index; |
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}; |
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/* |
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* VMCS12_REVISION is an arbitrary id that should be changed if the content or |
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* layout of struct vmcs12 is changed. MSR_IA32_VMX_BASIC returns this id, and |
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* VMPTRLD verifies that the VMCS region that L1 is loading contains this id. |
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* |
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* IMPORTANT: Changing this value will break save/restore compatibility with |
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* older kvm releases. |
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*/ |
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#define VMCS12_REVISION 0x11e57ed0 |
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/* |
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* VMCS12_SIZE is the number of bytes L1 should allocate for the VMXON region |
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* and any VMCS region. Although only sizeof(struct vmcs12) are used by the |
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* current implementation, 4K are reserved to avoid future complications and |
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* to preserve userspace ABI. |
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*/ |
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#define VMCS12_SIZE KVM_STATE_NESTED_VMX_VMCS_SIZE |
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/* |
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* VMCS12_MAX_FIELD_INDEX is the highest index value used in any |
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* supported VMCS12 field encoding. |
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*/ |
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#define VMCS12_MAX_FIELD_INDEX 0x17 |
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/* |
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* For save/restore compatibility, the vmcs12 field offsets must not change. |
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*/ |
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#define CHECK_OFFSET(field, loc) \ |
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BUILD_BUG_ON_MSG(offsetof(struct vmcs12, field) != (loc), \ |
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"Offset of " #field " in struct vmcs12 has changed.") |
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static inline void vmx_check_vmcs12_offsets(void) |
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{ |
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CHECK_OFFSET(hdr, 0); |
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CHECK_OFFSET(abort, 4); |
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CHECK_OFFSET(launch_state, 8); |
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CHECK_OFFSET(io_bitmap_a, 40); |
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CHECK_OFFSET(io_bitmap_b, 48); |
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CHECK_OFFSET(msr_bitmap, 56); |
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CHECK_OFFSET(vm_exit_msr_store_addr, 64); |
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CHECK_OFFSET(vm_exit_msr_load_addr, 72); |
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CHECK_OFFSET(vm_entry_msr_load_addr, 80); |
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CHECK_OFFSET(tsc_offset, 88); |
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CHECK_OFFSET(virtual_apic_page_addr, 96); |
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CHECK_OFFSET(apic_access_addr, 104); |
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CHECK_OFFSET(posted_intr_desc_addr, 112); |
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CHECK_OFFSET(ept_pointer, 120); |
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CHECK_OFFSET(eoi_exit_bitmap0, 128); |
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CHECK_OFFSET(eoi_exit_bitmap1, 136); |
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CHECK_OFFSET(eoi_exit_bitmap2, 144); |
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CHECK_OFFSET(eoi_exit_bitmap3, 152); |
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CHECK_OFFSET(xss_exit_bitmap, 160); |
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CHECK_OFFSET(guest_physical_address, 168); |
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CHECK_OFFSET(vmcs_link_pointer, 176); |
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CHECK_OFFSET(guest_ia32_debugctl, 184); |
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CHECK_OFFSET(guest_ia32_pat, 192); |
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CHECK_OFFSET(guest_ia32_efer, 200); |
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CHECK_OFFSET(guest_ia32_perf_global_ctrl, 208); |
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CHECK_OFFSET(guest_pdptr0, 216); |
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CHECK_OFFSET(guest_pdptr1, 224); |
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CHECK_OFFSET(guest_pdptr2, 232); |
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CHECK_OFFSET(guest_pdptr3, 240); |
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CHECK_OFFSET(guest_bndcfgs, 248); |
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CHECK_OFFSET(host_ia32_pat, 256); |
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CHECK_OFFSET(host_ia32_efer, 264); |
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CHECK_OFFSET(host_ia32_perf_global_ctrl, 272); |
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CHECK_OFFSET(vmread_bitmap, 280); |
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CHECK_OFFSET(vmwrite_bitmap, 288); |
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CHECK_OFFSET(vm_function_control, 296); |
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CHECK_OFFSET(eptp_list_address, 304); |
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CHECK_OFFSET(pml_address, 312); |
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CHECK_OFFSET(cr0_guest_host_mask, 344); |
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CHECK_OFFSET(cr4_guest_host_mask, 352); |
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CHECK_OFFSET(cr0_read_shadow, 360); |
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CHECK_OFFSET(cr4_read_shadow, 368); |
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CHECK_OFFSET(dead_space, 376); |
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CHECK_OFFSET(exit_qualification, 408); |
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CHECK_OFFSET(guest_linear_address, 416); |
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CHECK_OFFSET(guest_cr0, 424); |
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CHECK_OFFSET(guest_cr3, 432); |
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CHECK_OFFSET(guest_cr4, 440); |
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CHECK_OFFSET(guest_es_base, 448); |
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CHECK_OFFSET(guest_cs_base, 456); |
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CHECK_OFFSET(guest_ss_base, 464); |
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CHECK_OFFSET(guest_ds_base, 472); |
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CHECK_OFFSET(guest_fs_base, 480); |
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CHECK_OFFSET(guest_gs_base, 488); |
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CHECK_OFFSET(guest_ldtr_base, 496); |
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CHECK_OFFSET(guest_tr_base, 504); |
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CHECK_OFFSET(guest_gdtr_base, 512); |
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CHECK_OFFSET(guest_idtr_base, 520); |
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CHECK_OFFSET(guest_dr7, 528); |
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CHECK_OFFSET(guest_rsp, 536); |
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CHECK_OFFSET(guest_rip, 544); |
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CHECK_OFFSET(guest_rflags, 552); |
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CHECK_OFFSET(guest_pending_dbg_exceptions, 560); |
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CHECK_OFFSET(guest_sysenter_esp, 568); |
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CHECK_OFFSET(guest_sysenter_eip, 576); |
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CHECK_OFFSET(host_cr0, 584); |
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CHECK_OFFSET(host_cr3, 592); |
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CHECK_OFFSET(host_cr4, 600); |
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CHECK_OFFSET(host_fs_base, 608); |
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CHECK_OFFSET(host_gs_base, 616); |
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CHECK_OFFSET(host_tr_base, 624); |
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CHECK_OFFSET(host_gdtr_base, 632); |
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CHECK_OFFSET(host_idtr_base, 640); |
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CHECK_OFFSET(host_ia32_sysenter_esp, 648); |
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CHECK_OFFSET(host_ia32_sysenter_eip, 656); |
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CHECK_OFFSET(host_rsp, 664); |
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CHECK_OFFSET(host_rip, 672); |
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CHECK_OFFSET(pin_based_vm_exec_control, 744); |
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CHECK_OFFSET(cpu_based_vm_exec_control, 748); |
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CHECK_OFFSET(exception_bitmap, 752); |
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CHECK_OFFSET(page_fault_error_code_mask, 756); |
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CHECK_OFFSET(page_fault_error_code_match, 760); |
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CHECK_OFFSET(cr3_target_count, 764); |
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CHECK_OFFSET(vm_exit_controls, 768); |
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CHECK_OFFSET(vm_exit_msr_store_count, 772); |
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CHECK_OFFSET(vm_exit_msr_load_count, 776); |
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CHECK_OFFSET(vm_entry_controls, 780); |
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CHECK_OFFSET(vm_entry_msr_load_count, 784); |
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CHECK_OFFSET(vm_entry_intr_info_field, 788); |
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CHECK_OFFSET(vm_entry_exception_error_code, 792); |
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CHECK_OFFSET(vm_entry_instruction_len, 796); |
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CHECK_OFFSET(tpr_threshold, 800); |
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CHECK_OFFSET(secondary_vm_exec_control, 804); |
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CHECK_OFFSET(vm_instruction_error, 808); |
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CHECK_OFFSET(vm_exit_reason, 812); |
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CHECK_OFFSET(vm_exit_intr_info, 816); |
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CHECK_OFFSET(vm_exit_intr_error_code, 820); |
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CHECK_OFFSET(idt_vectoring_info_field, 824); |
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CHECK_OFFSET(idt_vectoring_error_code, 828); |
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CHECK_OFFSET(vm_exit_instruction_len, 832); |
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CHECK_OFFSET(vmx_instruction_info, 836); |
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CHECK_OFFSET(guest_es_limit, 840); |
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CHECK_OFFSET(guest_cs_limit, 844); |
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CHECK_OFFSET(guest_ss_limit, 848); |
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CHECK_OFFSET(guest_ds_limit, 852); |
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CHECK_OFFSET(guest_fs_limit, 856); |
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CHECK_OFFSET(guest_gs_limit, 860); |
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CHECK_OFFSET(guest_ldtr_limit, 864); |
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CHECK_OFFSET(guest_tr_limit, 868); |
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CHECK_OFFSET(guest_gdtr_limit, 872); |
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CHECK_OFFSET(guest_idtr_limit, 876); |
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CHECK_OFFSET(guest_es_ar_bytes, 880); |
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CHECK_OFFSET(guest_cs_ar_bytes, 884); |
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CHECK_OFFSET(guest_ss_ar_bytes, 888); |
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CHECK_OFFSET(guest_ds_ar_bytes, 892); |
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CHECK_OFFSET(guest_fs_ar_bytes, 896); |
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CHECK_OFFSET(guest_gs_ar_bytes, 900); |
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CHECK_OFFSET(guest_ldtr_ar_bytes, 904); |
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CHECK_OFFSET(guest_tr_ar_bytes, 908); |
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CHECK_OFFSET(guest_interruptibility_info, 912); |
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CHECK_OFFSET(guest_activity_state, 916); |
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CHECK_OFFSET(guest_sysenter_cs, 920); |
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CHECK_OFFSET(host_ia32_sysenter_cs, 924); |
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CHECK_OFFSET(vmx_preemption_timer_value, 928); |
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CHECK_OFFSET(virtual_processor_id, 960); |
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CHECK_OFFSET(posted_intr_nv, 962); |
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CHECK_OFFSET(guest_es_selector, 964); |
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CHECK_OFFSET(guest_cs_selector, 966); |
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CHECK_OFFSET(guest_ss_selector, 968); |
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CHECK_OFFSET(guest_ds_selector, 970); |
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CHECK_OFFSET(guest_fs_selector, 972); |
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CHECK_OFFSET(guest_gs_selector, 974); |
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CHECK_OFFSET(guest_ldtr_selector, 976); |
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CHECK_OFFSET(guest_tr_selector, 978); |
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CHECK_OFFSET(guest_intr_status, 980); |
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CHECK_OFFSET(host_es_selector, 982); |
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CHECK_OFFSET(host_cs_selector, 984); |
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CHECK_OFFSET(host_ss_selector, 986); |
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CHECK_OFFSET(host_ds_selector, 988); |
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CHECK_OFFSET(host_fs_selector, 990); |
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CHECK_OFFSET(host_gs_selector, 992); |
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CHECK_OFFSET(host_tr_selector, 994); |
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CHECK_OFFSET(guest_pml_index, 996); |
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} |
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extern const unsigned short vmcs_field_to_offset_table[]; |
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extern const unsigned int nr_vmcs12_fields; |
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#define ROL16(val, n) ((u16)(((u16)(val) << (n)) | ((u16)(val) >> (16 - (n))))) |
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static inline short vmcs_field_to_offset(unsigned long field) |
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{ |
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unsigned short offset; |
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unsigned int index; |
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if (field >> 15) |
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return -ENOENT; |
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index = ROL16(field, 6); |
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if (index >= nr_vmcs12_fields) |
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return -ENOENT; |
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index = array_index_nospec(index, nr_vmcs12_fields); |
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offset = vmcs_field_to_offset_table[index]; |
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if (offset == 0) |
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return -ENOENT; |
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return offset; |
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} |
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#undef ROL16 |
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static inline u64 vmcs12_read_any(struct vmcs12 *vmcs12, unsigned long field, |
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u16 offset) |
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{ |
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char *p = (char *)vmcs12 + offset; |
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switch (vmcs_field_width(field)) { |
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case VMCS_FIELD_WIDTH_NATURAL_WIDTH: |
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return *((natural_width *)p); |
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case VMCS_FIELD_WIDTH_U16: |
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return *((u16 *)p); |
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case VMCS_FIELD_WIDTH_U32: |
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return *((u32 *)p); |
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case VMCS_FIELD_WIDTH_U64: |
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return *((u64 *)p); |
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default: |
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WARN_ON_ONCE(1); |
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return -1; |
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} |
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} |
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static inline void vmcs12_write_any(struct vmcs12 *vmcs12, unsigned long field, |
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u16 offset, u64 field_value) |
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{ |
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char *p = (char *)vmcs12 + offset; |
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switch (vmcs_field_width(field)) { |
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case VMCS_FIELD_WIDTH_U16: |
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*(u16 *)p = field_value; |
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break; |
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case VMCS_FIELD_WIDTH_U32: |
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*(u32 *)p = field_value; |
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break; |
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case VMCS_FIELD_WIDTH_U64: |
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*(u64 *)p = field_value; |
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break; |
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case VMCS_FIELD_WIDTH_NATURAL_WIDTH: |
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*(natural_width *)p = field_value; |
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break; |
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default: |
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WARN_ON_ONCE(1); |
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break; |
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} |
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} |
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#endif /* __KVM_X86_VMX_VMCS12_H */
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