169 lines
3.6 KiB
C
169 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef ASM_KVM_SMM_H
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#define ASM_KVM_SMM_H
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#include <linux/build_bug.h>
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#ifdef CONFIG_KVM_SMM
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/*
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* 32 bit KVM's emulated SMM layout. Based on Intel P6 layout
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* (https://www.sandpile.org/x86/smm.htm).
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*/
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struct kvm_smm_seg_state_32 {
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u32 flags;
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u32 limit;
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u32 base;
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} __packed;
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struct kvm_smram_state_32 {
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u32 reserved1[62];
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u32 smbase;
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u32 smm_revision;
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u16 io_inst_restart;
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u16 auto_hlt_restart;
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u32 io_restart_rdi;
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u32 io_restart_rcx;
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u32 io_restart_rsi;
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u32 io_restart_rip;
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u32 cr4;
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/* A20M#, CPL, shutdown and other reserved/undocumented fields */
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u16 reserved2;
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u8 int_shadow; /* KVM extension */
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u8 reserved3[17];
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struct kvm_smm_seg_state_32 ds;
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struct kvm_smm_seg_state_32 fs;
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struct kvm_smm_seg_state_32 gs;
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struct kvm_smm_seg_state_32 idtr; /* IDTR has only base and limit */
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struct kvm_smm_seg_state_32 tr;
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u32 reserved;
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struct kvm_smm_seg_state_32 gdtr; /* GDTR has only base and limit */
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struct kvm_smm_seg_state_32 ldtr;
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struct kvm_smm_seg_state_32 es;
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struct kvm_smm_seg_state_32 cs;
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struct kvm_smm_seg_state_32 ss;
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u32 es_sel;
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u32 cs_sel;
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u32 ss_sel;
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u32 ds_sel;
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u32 fs_sel;
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u32 gs_sel;
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u32 ldtr_sel;
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u32 tr_sel;
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u32 dr7;
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u32 dr6;
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u32 gprs[8]; /* GPRS in the "natural" X86 order (EAX/ECX/EDX.../EDI) */
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u32 eip;
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u32 eflags;
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u32 cr3;
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u32 cr0;
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} __packed;
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/* 64 bit KVM's emulated SMM layout. Based on AMD64 layout */
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struct kvm_smm_seg_state_64 {
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u16 selector;
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u16 attributes;
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u32 limit;
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u64 base;
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};
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struct kvm_smram_state_64 {
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struct kvm_smm_seg_state_64 es;
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struct kvm_smm_seg_state_64 cs;
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struct kvm_smm_seg_state_64 ss;
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struct kvm_smm_seg_state_64 ds;
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struct kvm_smm_seg_state_64 fs;
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struct kvm_smm_seg_state_64 gs;
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struct kvm_smm_seg_state_64 gdtr; /* GDTR has only base and limit*/
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struct kvm_smm_seg_state_64 ldtr;
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struct kvm_smm_seg_state_64 idtr; /* IDTR has only base and limit*/
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struct kvm_smm_seg_state_64 tr;
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/* I/O restart and auto halt restart are not implemented by KVM */
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u64 io_restart_rip;
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u64 io_restart_rcx;
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u64 io_restart_rsi;
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u64 io_restart_rdi;
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u32 io_restart_dword;
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u32 reserved1;
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u8 io_inst_restart;
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u8 auto_hlt_restart;
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u8 amd_nmi_mask; /* Documented in AMD BKDG as NMI mask, not used by KVM */
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u8 int_shadow;
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u32 reserved2;
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u64 efer;
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/*
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* Two fields below are implemented on AMD only, to store
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* SVM guest vmcb address if the #SMI was received while in the guest mode.
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*/
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u64 svm_guest_flag;
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u64 svm_guest_vmcb_gpa;
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u64 svm_guest_virtual_int; /* unknown purpose, not implemented */
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u32 reserved3[3];
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u32 smm_revison;
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u32 smbase;
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u32 reserved4[5];
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/* ssp and svm_* fields below are not implemented by KVM */
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u64 ssp;
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u64 svm_guest_pat;
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u64 svm_host_efer;
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u64 svm_host_cr4;
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u64 svm_host_cr3;
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u64 svm_host_cr0;
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u64 cr4;
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u64 cr3;
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u64 cr0;
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u64 dr7;
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u64 dr6;
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u64 rflags;
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u64 rip;
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u64 gprs[16]; /* GPRS in a reversed "natural" X86 order (R15/R14/../RCX/RAX.) */
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};
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union kvm_smram {
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struct kvm_smram_state_64 smram64;
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struct kvm_smram_state_32 smram32;
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u8 bytes[512];
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};
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static inline int kvm_inject_smi(struct kvm_vcpu *vcpu)
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{
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kvm_make_request(KVM_REQ_SMI, vcpu);
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return 0;
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}
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static inline bool is_smm(struct kvm_vcpu *vcpu)
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{
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return vcpu->arch.hflags & HF_SMM_MASK;
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}
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void kvm_smm_changed(struct kvm_vcpu *vcpu, bool in_smm);
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void enter_smm(struct kvm_vcpu *vcpu);
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int emulator_leave_smm(struct x86_emulate_ctxt *ctxt);
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void process_smi(struct kvm_vcpu *vcpu);
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#else
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static inline int kvm_inject_smi(struct kvm_vcpu *vcpu) { return -ENOTTY; }
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static inline bool is_smm(struct kvm_vcpu *vcpu) { return false; }
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/*
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* emulator_leave_smm is used as a function pointer, so the
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* stub is defined in x86.c.
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*/
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#endif
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#endif
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