/* 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/<arch>/include/asm/mshyperv.h for definitions * that are specific to architecture <arch>. * * 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 <mikelley@microsoft.com> */ #ifndef _ASM_GENERIC_MSHYPERV_H#define _ASM_GENERIC_MSHYPERV_H #include <linux/types.h>#include <linux/atomic.h>#include <linux/bitops.h>#include <acpi/acpi_numa.h>#include <linux/cpumask.h>#include <linux/nmi.h>#include <asm/ptrace.h>#include <hyperv/hvhdk.h> #define VTPM_BASE_ADDRESS 0xfed40000 enum hv_partition_type {	HV_PARTITION_TYPE_GUEST,	HV_PARTITION_TYPE_ROOT,	HV_PARTITION_TYPE_L1VH,}; 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;	bool msi_ext_dest_id;	bool confidential_vmbus_available;};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, varhead_size, and rep_start comply with Hyper-V hypercall * definition. */static inline u64 hv_do_rep_hypercall_ex(u16 code, u16 rep_count,					 u16 varhead_size, u16 rep_start,					 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;	control |= (u64)rep_start << HV_HYPERCALL_REP_START_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;} /* For the typical case where rep_start is 0 */static inline u64 hv_do_rep_hypercall(u16 code, u16 rep_count, u16 varhead_size,				      void *input, void *output){	return hv_do_rep_hypercall_ex(code, rep_count, varhead_size, 0,				      input, output);} /* 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_LINUX_VENDOR_ID) << 48);	guest_id |= (kernel_version << 16); 	return guest_id;} int hv_get_hypervisor_version(union hv_hypervisor_version_info *info); void hv_setup_vmbus_handler(void (*handler)(void));void hv_remove_vmbus_handler(void);void hv_setup_stimer0_handler(void (*handler)(void));void hv_remove_stimer0_handler(void); void hv_setup_kexec_handler(void (*handler)(void));void hv_remove_kexec_handler(void);void hv_setup_crash_handler(void (*handler)(struct pt_regs *regs));void hv_remove_crash_handler(void);void hv_setup_mshv_handler(void (*handler)(void)); #if IS_ENABLED(CONFIG_HYPERV)/* * Hypervisor's notion of virtual processor ID is different from * Linux' notion of CPU ID. This information can only be retrieved * in the context of the calling CPU. Setup a map for easy access * to this information. */extern u32 *hv_vp_index;extern u32 hv_max_vp_index; extern u64 (*hv_read_reference_counter)(void); /* Sentinel value for an uninitialized entry in hv_vp_index array */#define VP_INVAL	U32_MAX int __init hv_common_init(void);void __init hv_get_partition_id(void);void __init hv_common_free(void);void __init ms_hyperv_late_init(void);int hv_common_cpu_init(unsigned int cpu);int hv_common_cpu_die(unsigned int cpu);void hv_identify_partition_type(void); /** * hv_cpu_number_to_vp_number() - Map CPU to VP. * @cpu_number: CPU number in Linux terms * * This function returns the mapping between the Linux processor * number and the hypervisor's virtual processor number, useful * in making hypercalls and such that talk about specific * processors. * * Return: Virtual processor number in Hyper-V terms */static inline int hv_cpu_number_to_vp_number(int cpu_number){	return hv_vp_index[cpu_number];} static inline int __cpumask_to_vpset(struct hv_vpset *vpset,				    const struct cpumask *cpus,				    bool (*func)(int cpu)){	int cpu, vcpu, vcpu_bank, vcpu_offset, nr_bank = 1;	int max_vcpu_bank = hv_max_vp_index / HV_VCPUS_PER_SPARSE_BANK; 	/* vpset.valid_bank_mask can represent up to HV_MAX_SPARSE_VCPU_BANKS banks */	if (max_vcpu_bank >= HV_MAX_SPARSE_VCPU_BANKS)		return 0; 	/*	 * Clear all banks up to the maximum possible bank as hv_tlb_flush_ex	 * structs are not cleared between calls, we risk flushing unneeded	 * vCPUs otherwise.	 */	for (vcpu_bank = 0; vcpu_bank <= max_vcpu_bank; vcpu_bank++)		vpset->bank_contents[vcpu_bank] = 0; 	/*	 * Some banks may end up being empty but this is acceptable.	 */	for_each_cpu(cpu, cpus) {		if (func && func(cpu))			continue;		vcpu = hv_cpu_number_to_vp_number(cpu);		if (vcpu == VP_INVAL)			return -1;		vcpu_bank = vcpu / HV_VCPUS_PER_SPARSE_BANK;		vcpu_offset = vcpu % HV_VCPUS_PER_SPARSE_BANK;		__set_bit(vcpu_offset, (unsigned long *)			  &vpset->bank_contents[vcpu_bank]);		if (vcpu_bank >= nr_bank)			nr_bank = vcpu_bank + 1;	}	vpset->valid_bank_mask = GENMASK_ULL(nr_bank - 1, 0);	return nr_bank;} /* * Convert a Linux cpumask into a Hyper-V VPset. In the _skip variant, * 'func' is called for each CPU present in cpumask.  If 'func' returns * true, that CPU is skipped -- i.e., that CPU from cpumask is *not* * added to the Hyper-V VPset. If 'func' is NULL, no CPUs are * skipped. */static inline int cpumask_to_vpset(struct hv_vpset *vpset,				    const struct cpumask *cpus){	return __cpumask_to_vpset(vpset, cpus, NULL);} static inline int cpumask_to_vpset_skip(struct hv_vpset *vpset,				    const struct cpumask *cpus,				    bool (*func)(int cpu)){	return __cpumask_to_vpset(vpset, cpus, func);} #define _hv_status_fmt(fmt) "%s: Hyper-V status: %#x = %s: " fmt#define hv_status_printk(level, status, fmt, ...) \do { \	u64 __status = (status); \	pr_##level(_hv_status_fmt(fmt), __func__, hv_result(__status), \		   hv_result_to_string(__status), ##__VA_ARGS__); \} while (0)#define hv_status_err(status, fmt, ...) \	hv_status_printk(err, status, fmt, ##__VA_ARGS__)#define hv_status_debug(status, fmt, ...) \	hv_status_printk(debug, status, fmt, ##__VA_ARGS__) const char *hv_result_to_string(u64 hv_status);int hv_result_to_errno(u64 status);void hyperv_report_panic(struct pt_regs *regs, long err, bool in_die);bool hv_is_hyperv_initialized(void);bool hv_is_hibernation_supported(void);enum hv_isolation_type hv_get_isolation_type(void);bool hv_is_isolation_supported(void);bool hv_isolation_type_snp(void);u64 hv_ghcb_hypercall(u64 control, void *input, void *output, u32 input_size);u64 hv_tdx_hypercall(u64 control, u64 param1, u64 param2);void hv_enable_coco_interrupt(unsigned int cpu, unsigned int vector, bool set);void hv_para_set_sint_proxy(bool enable);u64 hv_para_get_synic_register(unsigned int reg);void hv_para_set_synic_register(unsigned int reg, u64 val);void hyperv_cleanup(void);bool hv_query_ext_cap(u64 cap_query);void hv_setup_dma_ops(struct device *dev, bool coherent);#else /* CONFIG_HYPERV */static inline void hv_identify_partition_type(void) {}static inline bool hv_is_hyperv_initialized(void) { return false; }static inline bool hv_is_hibernation_supported(void) { return false; }static inline void hyperv_cleanup(void) {}static inline void ms_hyperv_late_init(void) {}static inline bool hv_is_isolation_supported(void) { return false; }static inline enum hv_isolation_type hv_get_isolation_type(void){	return HV_ISOLATION_TYPE_NONE;}#endif /* CONFIG_HYPERV */ #if IS_ENABLED(CONFIG_MSHV_ROOT)static inline bool hv_root_partition(void){	return hv_curr_partition_type == HV_PARTITION_TYPE_ROOT;}static inline bool hv_l1vh_partition(void){	return hv_curr_partition_type == HV_PARTITION_TYPE_L1VH;}static inline bool hv_parent_partition(void){	return hv_root_partition() || hv_l1vh_partition();} bool hv_result_needs_memory(u64 status);int hv_deposit_memory_node(int node, u64 partition_id, u64 status);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); #else /* CONFIG_MSHV_ROOT */static inline bool hv_root_partition(void) { return false; }static inline bool hv_l1vh_partition(void) { return false; }static inline bool hv_parent_partition(void) { return false; }static inline bool hv_result_needs_memory(u64 status) { return false; }static inline int hv_deposit_memory_node(int node, u64 partition_id, u64 status){	return -EOPNOTSUPP;}static inline int hv_call_deposit_pages(int node, u64 partition_id, u32 num_pages){	return -EOPNOTSUPP;}static inline int hv_call_add_logical_proc(int node, u32 lp_index, u32 acpi_id){	return -EOPNOTSUPP;}static inline int hv_call_create_vp(int node, u64 partition_id, u32 vp_index, u32 flags){	return -EOPNOTSUPP;}#endif /* CONFIG_MSHV_ROOT */ static inline int hv_deposit_memory(u64 partition_id, u64 status){	return hv_deposit_memory_node(NUMA_NO_NODE, partition_id, status);} #if IS_ENABLED(CONFIG_HYPERV_VTL_MODE)u8 __init get_vtl(void);#elsestatic inline u8 get_vtl(void) { return 0; }#endif #endif