1 $ˆÆÅ „Y}ïÄa–Ým_J*j"T†À½q ©‹FÿÃ,†/* SPDX-License-Identifier: GPL-2.0 */ /* * Linux-specific definitions for managing interactions with Microsoft's * Hyper-V hypervisor. The definitions in this file are architecture * independent. See arch//include/asm/mshyperv.h for definitions * that are specific to architecture . * * Definitions that are derived from Hyper-V code or headers should not go in * this file, but should instead go in the relevant files in include/hyperv. * * Copyright (C) 2019, Microsoft, Inc. * * Author : Michael Kelley */ #ifndef _ASM_GENERIC_MSHYPERV_H #define _ASM_GENERIC_MSHYPERV_H #include #include #include #include #include #include #include #include #define VTPM_BASE_ADDRESS 0xfed40000 enum hv_partition_type { HV_PARTITION_TYPE_GUEST, HV_PARTITION_TYPE_ROOT, }; struct ms_hyperv_info { u32 features; u32 priv_high; u32 ext_features; u32 misc_features; u32 hints; u32 nested_features; u32 max_vp_index; u32 max_lp_index; u8 vtl; union { u32 isolation_config_a; struct { u32 paravisor_present : 1; u32 reserved_a1 : 31; }; }; union { u32 isolation_config_b; struct { u32 cvm_type : 4; u32 reserved_b1 : 1; u32 shared_gpa_boundary_active : 1; u32 shared_gpa_boundary_bits : 6; u32 reserved_b2 : 20; }; }; u64 shared_gpa_boundary; }; extern struct ms_hyperv_info ms_hyperv; extern bool hv_nested; extern u64 hv_current_partition_id; extern enum hv_partition_type hv_curr_partition_type; extern void * __percpu *hyperv_pcpu_input_arg; extern void * __percpu *hyperv_pcpu_output_arg; u64 hv_do_hypercall(u64 control, void *inputaddr, void *outputaddr); u64 hv_do_fast_hypercall8(u16 control, u64 input8); u64 hv_do_fast_hypercall16(u16 control, u64 input1, u64 input2); bool hv_isolation_type_snp(void); bool hv_isolation_type_tdx(void); /* * On architectures where Hyper-V doesn't support AEOI (e.g., ARM64), * it doesn't provide a recommendation flag and AEOI must be disabled. */ static inline bool hv_recommend_using_aeoi(void) { #ifdef HV_DEPRECATING_AEOI_RECOMMENDED return !(ms_hyperv.hints & HV_DEPRECATING_AEOI_RECOMMENDED); #else return false; #endif } static inline struct hv_proximity_domain_info hv_numa_node_to_pxm_info(int node) { struct hv_proximity_domain_info pxm_info = {}; if (node != NUMA_NO_NODE) { pxm_info.domain_id = node_to_pxm(node); pxm_info.flags.proximity_info_valid = 1; pxm_info.flags.proximity_preferred = 1; } return pxm_info; } /* Helper functions that provide a consistent pattern for checking Hyper-V hypercall status. */ static inline int hv_result(u64 status) { return status & HV_HYPERCALL_RESULT_MASK; } static inline bool hv_result_success(u64 status) { return hv_result(status) == HV_STATUS_SUCCESS; } static inline unsigned int hv_repcomp(u64 status) { /* Bits [43:32] of status have 'Reps completed' data. */ return (status & HV_HYPERCALL_REP_COMP_MASK) >> HV_HYPERCALL_REP_COMP_OFFSET; } /* * Rep hypercalls. Callers of this functions are supposed to ensure that * rep_count and varhead_size comply with Hyper-V hypercall definition. */ static inline u64 hv_do_rep_hypercall(u16 code, u16 rep_count, u16 varhead_size, void *input, void *output) { u64 control = code; u64 status; u16 rep_comp; control |= (u64)varhead_size << HV_HYPERCALL_VARHEAD_OFFSET; control |= (u64)rep_count << HV_HYPERCALL_REP_COMP_OFFSET; do { status = hv_do_hypercall(control, input, output); if (!hv_result_success(status)) return status; rep_comp = hv_repcomp(status); control &= ~HV_HYPERCALL_REP_START_MASK; control |= (u64)rep_comp << HV_HYPERCALL_REP_START_OFFSET; touch_nmi_watchdog(); } while (rep_comp < rep_count); return status; } /* Generate the guest OS identifier as described in the Hyper-V TLFS */ static inline u64 hv_generate_guest_id(u64 kernel_version) { u64 guest_id; guest_id = (((u64)HV_