/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_X86_MSHYPER_H #define _ASM_X86_MSHYPER_H #include #include #include #include #include #include #include #include /* * Hyper-V always provides a single IO-APIC at this MMIO address. * Ideally, the value should be looked up in ACPI tables, but it * is needed for mapping the IO-APIC early in boot on Confidential * VMs, before ACPI functions can be used. */ #define HV_IOAPIC_BASE_ADDRESS 0xfec00000 #define HV_VTL_NORMAL 0x0 #define HV_VTL_SECURE 0x1 #define HV_VTL_MGMT 0x2 union hv_ghcb; DECLARE_STATIC_KEY_FALSE(isolation_type_snp); DECLARE_STATIC_KEY_FALSE(isolation_type_tdx); typedef int (*hyperv_fill_flush_list_func)( struct hv_guest_mapping_flush_list *flush, void *data); void hyperv_vector_handler(struct pt_regs *regs); static inline unsigned char hv_get_nmi_reason(void) { return 0; } #if IS_ENABLED(CONFIG_HYPERV) extern bool hyperv_paravisor_present; extern void *hv_hypercall_pg; extern u64 hv_current_partition_id; extern union hv_ghcb * __percpu *hv_ghcb_pg; bool hv_isolation_type_snp(void); bool hv_isolation_type_tdx(void); u64 hv_tdx_hypercall(u64 control, u64 param1, u64 param2); /* * DEFAULT INIT GPAT and SEGMENT LIMIT value in struct VMSA * to start AP in enlightened SEV guest. */ #define HV_AP_INIT_GPAT_DEFAULT 0x0007040600070406ULL #define HV_AP_SEGMENT_LIMIT 0xffffffff int hv_call_deposit_pages(int node, u64 partition_id, u32 num_pages); int hv_call_add_logical_proc(int node, u32 lp_index, u32 acpi_id); int hv_call_create_vp(int node, u64 partition_id, u32 vp_index, u32 flags); /* * If the hypercall involves no input or output parameters, the hypervisor * ignores the corresponding GPA pointer. */ static inline u64 hv_do_hypercall(u64 control, void *input, void *output) { u64 input_address = input ? virt_to_phys(input) : 0; u64 output_address = output ? virt_to_phys(output) : 0; u64 hv_status; #ifdef CONFIG_X86_64 if (hv_isolation_type_tdx() && !hyperv_paravisor_present) return hv_tdx_hypercall(control, input_address, output_address); if (hv_isolation_type_snp() && !hyperv_paravisor_present) { __asm__ __volatile__("mov %4, %%r8\n" "vmmcall" : "=a" (hv_status), ASM_CALL_CONSTRAINT, "+c" (control), "+d" (input_address) : "r" (output_address) : "cc", "memory", "r8", "r9", "r10", "r11"); return hv_status; } if (!hv_hypercall_pg) return U64_MAX; __asm__ __volatile__("mov %4, %%r8\n" CALL_NOSPEC : "=a" (hv_status), ASM_CALL_CONSTRAINT, "+c" (control), "+d" (input_address) : "r" (output_address), THUNK_TARGET(hv_hypercall_pg) : "cc", "memory", "r8", "r9", "r10", "r11"); #else u32 input_address_hi = upper_32_bits(input_address); u32 input_address_lo = lower_32_bits(input_address); u32 output_address_hi = upper_32_bits(output_address); u32 output_address_lo = lower_32_bits(output_address); if (!hv_hypercall_pg) return U64_MAX; __asm__ __volatile__(CALL_NOSPEC : "=A" (hv_status), "+c" (input_address_lo), ASM_CALL_CONSTRAINT : "A" (control), "b" (input_address_hi), "D"(output_address_hi), "S"(output_address_lo), THUNK_TARGET(hv_hypercall_pg) : "cc", "memory"); #endif /* !x86_64 */ return hv_status; } /* Hypercall to the L0 hypervisor */ static inline u64 hv_do_nested_hypercall(u64 control, void *input, void *output) { return hv_do_hypercall(control | HV_HYPERCALL_NESTED, input, output); } /* Fast hypercall with 8 bytes of input and no output */ static inline u64 _hv_do_fast_hypercall8(u64 control, u64 input1) { u64 hv_status; #ifdef CONFIG_X86_64 if (hv_isolation_type_tdx() && !hyperv_paravisor_present) return hv_tdx_hypercall(control, input1, 0); if (hv_isolation_type_snp() && !hyperv_paravisor_present) { __asm__ __volatile__( "vmmcall" : "=a" (hv_status), ASM_CALL_CONSTRAINT, "+c" (control), "+d" (input1) :: "cc", "r8", "r9", "r10", "r11"); } else { __asm__ __volatile__(CALL_NOSPEC : "=a" (hv_status), ASM_CALL_CONSTRAINT, "+c" (control), "+d" (input1) : THUNK_TARGET(hv_hypercall_pg) : "cc", "r8", "r9", "r10", "r11"); } #else { u32 input1_hi = upper_32_bits(input1); u32 input1_lo = lower_32_bits(input1); __asm__ __volatile__ (CALL_NOSPEC : "=A"(hv_status), "+c"(input1_lo), ASM_CALL_CONSTRAINT : "A" (control), "b" (input1_hi), THUNK_TARGET(hv_hypercall_pg) : "cc", "edi", "esi"); } #endif return hv_status; } static inline u64 hv_do_fast_hypercall8(u16 code, u64 input1) { u64 control = (u64)code | HV_HYPERCALL_FAST_BIT; return _hv_do_fast_hypercall8(control, input1); } static inline u64 hv_do_fast_nested_hypercall8(u16 code, u64 input1) { u64 control = (u64)code | HV_HYPERCALL_FAST_BIT | HV_HYPERCALL_NESTED; return _hv_do_fast_hypercall8(control, input1); } /* Fast hypercall with 16 bytes of input */ static inline u64 _hv_do_fast_hypercall16(u64 control, u64 input1, u64 input2) { u64 hv_status; #ifdef CONFIG_X86_64 if (hv_isolation_type_tdx() && !hyperv_paravisor_present) return hv_tdx_hypercall(control, input1, input2); if (hv_isolation_type_snp() && !hyperv_paravisor_present) { __asm__ __volatile__("mov %4, %%r8\n" "vmmcall" : "=a" (hv_status), ASM_CALL_CONSTRAINT, "+c" (control), "+d" (input1) : "r" (input2) : "cc", "r8", "r9", "r10", "r11"); } else { __asm__ __volatile__("mov %4, %%r8\n" CALL_NOSPEC : "=a" (hv_status), ASM_CALL_CONSTRAINT, "+c" (control), "+d" (input1) : "r" (input2), THUNK_TARGET(hv_hypercall_pg) : "cc", "r8", "r9", "r10", "r11"); } #else { u32 input1_hi = upper_32_bits(input1); u32 input1_lo = lower_32_bits(input1); u32 input2_hi = upper_32_bits(input2); u32 input2_lo = lower_32_bits(input2); __asm__ __volatile__ (CALL_NOSPEC : "=A"(hv_status), "+c"(input1_lo), ASM_CALL_CONSTRAINT : "A" (control), "b" (input1_hi), "D"(input2_hi), "S"(input2_lo), THUNK_TARGET(hv_hypercall_pg) : "cc"); } #endif return hv_status; } static inline u64 hv_do_fast_hypercall16(u16 code, u64 input1, u64 input2) { u64 control = (u64)code | HV_HYPERCALL_FAST_BIT; return _hv_do_fast_hypercall16(control, input1, input2); } static inline u64 hv_do_fast_nested_hypercall16(u16 code, u64 input1, u64 input2) { u64 control = (u64)code | HV_HYPERCALL_FAST_BIT | HV_HYPERCALL_NESTED; return _hv_do_fast_hypercall16(control, input1, input2); } extern struct hv_vp_assist_page **hv_vp_assist_page; static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) { if (!hv_vp_assist_page) return NULL; return hv_vp_assist_page[cpu]; } void __init hyperv_init(void); void hyperv_setup_mmu_ops(void); void set_hv_tscchange_cb(void (*cb)(void)); void clear_hv_tscchange_cb(void); void hyperv_stop_tsc_emulation(void); int hyperv_flush_guest_mapping(u64 as); int hyperv_flush_guest_mapping_range(u64 as, hyperv_fill_flush_list_func fill_func, void *data); int hyperv_fill_flush_guest_mapping_list( struct hv_guest_mapping_flush_list *flush, u64 start_gfn, u64 end_gfn); #ifdef CONFIG_X86_64 void hv_apic_init(void); void __init hv_init_spinlocks(void); bool hv_vcpu_is_preempted(int vcpu); #else static inline void hv_apic_init(void) {} #endif struct irq_domain *hv_create_pci_msi_domain(void); int hv_map_ioapic_interrupt(int ioapic_id, bool level, int vcpu, int vector, struct hv_interrupt_entry *entry); int hv_unmap_ioapic_interrupt(int ioapic_id, struct hv_interrupt_entry *entry); #ifdef CONFIG_AMD_MEM_ENCRYPT bool hv_ghcb_negotiate_protocol(void); void __noreturn hv_ghcb_terminate(unsigned int set, unsigned int reason); int hv_snp_boot_ap(int cpu, unsigned long start_ip); #else static inline bool hv_ghcb_negotiate_protocol(void) { return false; } static inline void hv_ghcb_terminate(unsigned int set, unsigned int reason) {} static inline int hv_snp_boot_ap(int cpu, unsigned long start_ip) { return 0; } #endif #if defined(CONFIG_AMD_MEM_ENCRYPT) || defined(CONFIG_INTEL_TDX_GUEST) void hv_vtom_init(void); void hv_ivm_msr_write(u64 msr, u64 value); void hv_ivm_msr_read(u64 msr, u64 *value); #else static inline void hv_vtom_init(void) {} static inline void hv_ivm_msr_write(u64 msr, u64 value) {} static inline void hv_ivm_msr_read(u64 msr, u64 *value) {} #endif static inline bool hv_is_synic_reg(unsigned int reg) { return (reg >= HV_REGISTER_SCONTROL) && (reg <= HV_REGISTER_SINT15); } static inline bool hv_is_sint_reg(unsigned int reg) { return (reg >= HV_REGISTER_SINT0) && (reg <= HV_REGISTER_SINT15); } u64 hv_get_register(unsigned int reg); void hv_set_register(unsigned int reg, u64 value); u64 hv_get_non_nested_register(unsigned int reg); void hv_set_non_nested_register(unsigned int reg, u64 value); static __always_inline u64 hv_raw_get_register(unsigned int reg) { return __rdmsr(reg); } #else /* CONFIG_HYPERV */ static inline void hyperv_init(void) {} static inline void hyperv_setup_mmu_ops(void) {} static inline void set_hv_tscchange_cb(void (*cb)(void)) {} static inline void clear_hv_tscchange_cb(void) {} static inline void hyperv_stop_tsc_emulation(void) {}; static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) { return NULL; } static inline int hyperv_flush_guest_mapping(u64 as) { return -1; } static inline int hyperv_flush_guest_mapping_range(u64 as, hyperv_fill_flush_list_func fill_func, void *data) { return -1; } static inline void hv_set_register(unsigned int reg, u64 value) { } static inline u64 hv_get_register(unsigned int reg) { return 0; } static inline void hv_set_non_nested_register(unsigned int reg, u64 value) { } static inline u64 hv_get_non_nested_register(unsigned int reg) { return 0; } #endif /* CONFIG_HYPERV */ #ifdef CONFIG_HYPERV_VTL_MODE void __init hv_vtl_init_platform(void); int __init hv_vtl_early_init(void); #else static inline void __init hv_vtl_init_platform(void) {} static inline int __init hv_vtl_early_init(void) { return 0; } #endif #include #endif