diff options
Diffstat (limited to 'include/asm-generic/mshyperv.h')
| -rw-r--r-- | include/asm-generic/mshyperv.h | 257 |
1 files changed, 228 insertions, 29 deletions
diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h index c57799684170..a729b77983fa 100644 --- a/include/asm-generic/mshyperv.h +++ b/include/asm-generic/mshyperv.h @@ -6,9 +6,8 @@ * independent. See arch/<arch>/include/asm/mshyperv.h for definitions * that are specific to architecture <arch>. * - * Definitions that are specified in the Hyper-V Top Level Functional - * Spec (TLFS) should not go in this file, but should instead go in - * hyperv-tlfs.h. + * 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. * @@ -21,39 +20,148 @@ #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 <asm/hyperv-tlfs.h> +#include <hyperv/hvhdk.h> + +#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; -extern u64 hv_do_hypercall(u64 control, void *inputaddr, void *outputaddr); -extern u64 hv_do_fast_hypercall8(u16 control, u64 input8); + 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 generate_guest_id(__u64 d_info1, __u64 kernel_version, - __u64 d_info2) +static inline u64 hv_generate_guest_id(u64 kernel_version) { - __u64 guest_id = 0; + u64 guest_id; - guest_id = (((__u64)HV_LINUX_VENDOR_ID) << 48); - guest_id |= (d_info1 << 48); + guest_id = (((u64)HV_LINUX_VENDOR_ID) << 48); guest_id |= (kernel_version << 16); - guest_id |= d_info2; return guest_id; } - /* Free the message slot and signal end-of-message if required */ static inline void vmbus_signal_eom(struct hv_message *msg, u32 old_msg_type) { @@ -85,21 +193,25 @@ static inline void vmbus_signal_eom(struct hv_message *msg, u32 old_msg_type) * possibly deliver another msg from the * hypervisor */ - hv_signal_eom(); + hv_set_msr(HV_MSR_EOM, 0); } } -int hv_setup_vmbus_irq(int irq, void (*handler)(void)); -void hv_remove_vmbus_irq(void); -void hv_enable_vmbus_irq(void); -void hv_disable_vmbus_irq(void); +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)); extern int vmbus_interrupt; +extern int vmbus_irq; #if IS_ENABLED(CONFIG_HYPERV) /* @@ -111,9 +223,19 @@ extern int vmbus_interrupt; 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 @@ -130,13 +252,15 @@ 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) +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; - /* valid_bank_mask can represent up to 64 banks */ - if (hv_max_vp_index / 64 >= 64) + /* 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; /* @@ -144,18 +268,20 @@ static inline int cpumask_to_vpset(struct hv_vpset *vpset, * structs are not cleared between calls, we risk flushing unneeded * vCPUs otherwise. */ - for (vcpu_bank = 0; vcpu_bank <= hv_max_vp_index / 64; vcpu_bank++) + 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 / 64; - vcpu_offset = vcpu % 64; + 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) @@ -165,20 +291,93 @@ static inline int cpumask_to_vpset(struct hv_vpset *vpset, 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); -void hyperv_report_panic_msg(phys_addr_t pa, size_t size); 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 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_HYPERV) -extern int hv_setup_stimer0_irq(int *irq, int *vector, void (*handler)(void)); -extern void hv_remove_stimer0_irq(int irq); +#if IS_ENABLED(CONFIG_MSHV_ROOT) +static inline bool hv_root_partition(void) +{ + return hv_curr_partition_type == HV_PARTITION_TYPE_ROOT; +} +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 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 */ + +#if IS_ENABLED(CONFIG_HYPERV_VTL_MODE) +u8 __init get_vtl(void); +#else +static inline u8 get_vtl(void) { return 0; } #endif #endif |