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217 lines
5.8 KiB
217 lines
5.8 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_X86_MSHYPER_H |
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#define _ASM_X86_MSHYPER_H |
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#include <linux/types.h> |
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#include <linux/nmi.h> |
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#include <linux/msi.h> |
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#include <asm/io.h> |
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#include <asm/hyperv-tlfs.h> |
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#include <asm/nospec-branch.h> |
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#include <asm/paravirt.h> |
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#include <asm/mshyperv.h> |
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typedef int (*hyperv_fill_flush_list_func)( |
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struct hv_guest_mapping_flush_list *flush, |
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void *data); |
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static inline void hv_set_register(unsigned int reg, u64 value) |
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{ |
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wrmsrl(reg, value); |
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} |
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static inline u64 hv_get_register(unsigned int reg) |
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{ |
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u64 value; |
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rdmsrl(reg, value); |
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return value; |
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} |
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#define hv_get_raw_timer() rdtsc_ordered() |
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void hyperv_vector_handler(struct pt_regs *regs); |
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#if IS_ENABLED(CONFIG_HYPERV) |
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extern int hyperv_init_cpuhp; |
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extern void *hv_hypercall_pg; |
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extern void __percpu **hyperv_pcpu_input_arg; |
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extern void __percpu **hyperv_pcpu_output_arg; |
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extern u64 hv_current_partition_id; |
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int hv_call_deposit_pages(int node, u64 partition_id, u32 num_pages); |
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int hv_call_add_logical_proc(int node, u32 lp_index, u32 acpi_id); |
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int hv_call_create_vp(int node, u64 partition_id, u32 vp_index, u32 flags); |
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static inline u64 hv_do_hypercall(u64 control, void *input, void *output) |
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{ |
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u64 input_address = input ? virt_to_phys(input) : 0; |
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u64 output_address = output ? virt_to_phys(output) : 0; |
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u64 hv_status; |
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#ifdef CONFIG_X86_64 |
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if (!hv_hypercall_pg) |
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return U64_MAX; |
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__asm__ __volatile__("mov %4, %%r8\n" |
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CALL_NOSPEC |
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: "=a" (hv_status), ASM_CALL_CONSTRAINT, |
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"+c" (control), "+d" (input_address) |
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: "r" (output_address), |
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THUNK_TARGET(hv_hypercall_pg) |
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: "cc", "memory", "r8", "r9", "r10", "r11"); |
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#else |
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u32 input_address_hi = upper_32_bits(input_address); |
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u32 input_address_lo = lower_32_bits(input_address); |
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u32 output_address_hi = upper_32_bits(output_address); |
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u32 output_address_lo = lower_32_bits(output_address); |
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if (!hv_hypercall_pg) |
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return U64_MAX; |
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__asm__ __volatile__(CALL_NOSPEC |
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: "=A" (hv_status), |
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"+c" (input_address_lo), ASM_CALL_CONSTRAINT |
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: "A" (control), |
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"b" (input_address_hi), |
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"D"(output_address_hi), "S"(output_address_lo), |
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THUNK_TARGET(hv_hypercall_pg) |
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: "cc", "memory"); |
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#endif /* !x86_64 */ |
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return hv_status; |
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} |
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/* Fast hypercall with 8 bytes of input and no output */ |
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static inline u64 hv_do_fast_hypercall8(u16 code, u64 input1) |
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{ |
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u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT; |
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#ifdef CONFIG_X86_64 |
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{ |
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__asm__ __volatile__(CALL_NOSPEC |
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: "=a" (hv_status), ASM_CALL_CONSTRAINT, |
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"+c" (control), "+d" (input1) |
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: THUNK_TARGET(hv_hypercall_pg) |
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: "cc", "r8", "r9", "r10", "r11"); |
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} |
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#else |
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{ |
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u32 input1_hi = upper_32_bits(input1); |
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u32 input1_lo = lower_32_bits(input1); |
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__asm__ __volatile__ (CALL_NOSPEC |
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: "=A"(hv_status), |
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"+c"(input1_lo), |
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ASM_CALL_CONSTRAINT |
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: "A" (control), |
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"b" (input1_hi), |
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THUNK_TARGET(hv_hypercall_pg) |
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: "cc", "edi", "esi"); |
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} |
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#endif |
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return hv_status; |
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} |
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/* Fast hypercall with 16 bytes of input */ |
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static inline u64 hv_do_fast_hypercall16(u16 code, u64 input1, u64 input2) |
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{ |
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u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT; |
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#ifdef CONFIG_X86_64 |
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{ |
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__asm__ __volatile__("mov %4, %%r8\n" |
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CALL_NOSPEC |
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: "=a" (hv_status), ASM_CALL_CONSTRAINT, |
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"+c" (control), "+d" (input1) |
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: "r" (input2), |
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THUNK_TARGET(hv_hypercall_pg) |
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: "cc", "r8", "r9", "r10", "r11"); |
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} |
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#else |
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{ |
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u32 input1_hi = upper_32_bits(input1); |
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u32 input1_lo = lower_32_bits(input1); |
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u32 input2_hi = upper_32_bits(input2); |
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u32 input2_lo = lower_32_bits(input2); |
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__asm__ __volatile__ (CALL_NOSPEC |
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: "=A"(hv_status), |
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"+c"(input1_lo), ASM_CALL_CONSTRAINT |
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: "A" (control), "b" (input1_hi), |
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"D"(input2_hi), "S"(input2_lo), |
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THUNK_TARGET(hv_hypercall_pg) |
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: "cc"); |
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} |
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#endif |
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return hv_status; |
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} |
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extern struct hv_vp_assist_page **hv_vp_assist_page; |
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static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) |
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{ |
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if (!hv_vp_assist_page) |
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return NULL; |
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return hv_vp_assist_page[cpu]; |
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} |
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void __init hyperv_init(void); |
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void hyperv_setup_mmu_ops(void); |
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void set_hv_tscchange_cb(void (*cb)(void)); |
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void clear_hv_tscchange_cb(void); |
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void hyperv_stop_tsc_emulation(void); |
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int hyperv_flush_guest_mapping(u64 as); |
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int hyperv_flush_guest_mapping_range(u64 as, |
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hyperv_fill_flush_list_func fill_func, void *data); |
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int hyperv_fill_flush_guest_mapping_list( |
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struct hv_guest_mapping_flush_list *flush, |
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u64 start_gfn, u64 end_gfn); |
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extern bool hv_root_partition; |
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#ifdef CONFIG_X86_64 |
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void hv_apic_init(void); |
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void __init hv_init_spinlocks(void); |
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bool hv_vcpu_is_preempted(int vcpu); |
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#else |
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static inline void hv_apic_init(void) {} |
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#endif |
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static inline void hv_set_msi_entry_from_desc(union hv_msi_entry *msi_entry, |
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struct msi_desc *msi_desc) |
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{ |
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msi_entry->address.as_uint32 = msi_desc->msg.address_lo; |
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msi_entry->data.as_uint32 = msi_desc->msg.data; |
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} |
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struct irq_domain *hv_create_pci_msi_domain(void); |
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int hv_map_ioapic_interrupt(int ioapic_id, bool level, int vcpu, int vector, |
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struct hv_interrupt_entry *entry); |
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int hv_unmap_ioapic_interrupt(int ioapic_id, struct hv_interrupt_entry *entry); |
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#else /* CONFIG_HYPERV */ |
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static inline void hyperv_init(void) {} |
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static inline void hyperv_setup_mmu_ops(void) {} |
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static inline void set_hv_tscchange_cb(void (*cb)(void)) {} |
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static inline void clear_hv_tscchange_cb(void) {} |
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static inline void hyperv_stop_tsc_emulation(void) {}; |
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static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) |
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{ |
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return NULL; |
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} |
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static inline int hyperv_flush_guest_mapping(u64 as) { return -1; } |
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static inline int hyperv_flush_guest_mapping_range(u64 as, |
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hyperv_fill_flush_list_func fill_func, void *data) |
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{ |
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return -1; |
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} |
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#endif /* CONFIG_HYPERV */ |
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#include <asm-generic/mshyperv.h> |
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#endif
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