64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
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#ifndef UTSM_VMM_H
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#define UTSM_VMM_H
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#include <utsm/types.h>
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/* VMM 顶层 API：协调 VMX/EPT/VMCS/VMEXIT，启动 guest。
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*
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* Phase 1.1（当前）：vmm_init() 完成 VMX root 启用 + EPT 初始化，
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* vmm_self_test() 启动一个最小 guest（HLT 指令）验证 VMEXIT 路径。
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*
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* Phase 1.2+：vmm_launch_linux() 加载并启动 Linux 6.6 LTS guest。
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*/
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/* ===== Guest register save area =====
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*
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* VMCS does NOT save guest GPRs (RAX-R15) on VM-Exit. The assembly VM-Exit
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* handler (vmexit_asm.S) saves all 16 GPRs into this structure before
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* calling the C dispatcher, and restores them before vmresume.
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*
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* C handlers (e.g. hypercall.c) can read guest arguments from this structure
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* and write return values (e.g. g_guest_regs.rax = retval) which will be
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* loaded into the CPU before vmresume resumes the guest. */
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struct vmexit_guest_regs {
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u64 rax;
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u64 rbx;
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u64 rcx;
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u64 rdx;
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u64 rsi;
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u64 rdi;
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u64 rbp;
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u64 r8;
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u64 r9;
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u64 r10;
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u64 r11;
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u64 r12;
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u64 r13;
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u64 r14;
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u64 r15;
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};
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/* Global guest register save area (referenced by vmexit_asm.S).
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* Non-static: shared between vmm.c, vmexit.c, hypercall.c, and vmexit_asm.S. */
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extern volatile struct vmexit_guest_regs g_guest_regs;
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/* ===== VMM API ===== */
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/* 初始化 VMM：VMX root 模式 + EPT 表 + 分配 VMCS。
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* 返回 0 成功，负值失败。 */
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int vmm_init(void);
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/* 关闭 VMM：vmxoff。 */
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void vmm_shutdown(void);
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/* Phase 1.1 自检：启动最小 guest 验证 VMX 路径。
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* guest 代码为内嵌的 HLT 指令，预期触发 HLT VMEXIT。
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* 返回 0 成功。 */
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int vmm_self_test(void);
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/* VMM 状态查询 */
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int vmm_is_ready(void);
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u64 vmm_get_eptp(void);
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#endif
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