| 1 |
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| 2 |
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| 3 | |
| 4 | * Linux-specific definitions for managing interactions with Microsoft's
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| 5 | * Hyper-V hypervisor. The definitions in this file are specific to
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| 6 | * the ARM64 architecture. See include/asm-generic/mshyperv.h for
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| 7 | * definitions are that architecture independent.
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| 8 | *
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| 9 | * Definitions that are derived from Hyper-V code or headers should not go in
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| 10 | * this file, but should instead go in the relevant files in include/hyperv.
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| 11 | *
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| 12 | * Copyright (C) 2021, Microsoft, Inc.
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| 13 | *
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| 14 | * Author : Michael Kelley <[email protected]>
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| 15 |
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| 16 |
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| 17 | #ifndef _ASM_MSHYPERV_H
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| 18 | #define _ASM_MSHYPERV_H
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| 19 |
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| 20 | #include <linux/types.h>
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| 21 | #include <linux/arm-smccc.h>
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| 22 | #include <hyperv/hvhdk.h>
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| 23 |
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| 24 | |
| 25 | * Declare calls to get and set Hyper-V VP register values on ARM64, which
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| 26 | * requires a hypercall.
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| 27 |
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| 28 |
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| 29 | void hv_set_vpreg(u32 reg, u64 value);
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| 30 | u64 hv_get_vpreg(u32 reg);
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| 31 | void hv_get_vpreg_128(u32 reg, struct hv_get_vp_registers_output *result);
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| 32 |
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| 33 | static inline void hv_set_msr(unsigned int reg, u64 value)
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| 34 | {
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| 35 | hv_set_vpreg(reg, value);
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| 36 | }
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| 37 |
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| 38 | static inline u64 hv_get_msr(unsigned int reg)
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| 39 | {
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| 40 | return hv_get_vpreg(reg);
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| 41 | }
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| 42 |
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| 43 | |
| 44 | * Nested is not supported on arm64
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| 45 |
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| 46 | static inline void hv_set_non_nested_msr(unsigned int reg, u64 value)
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| 47 | {
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| 48 | hv_set_msr(reg, value);
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| 49 | }
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| 50 |
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| 51 | static inline u64 hv_get_non_nested_msr(unsigned int reg)
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| 52 | {
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| 53 | return hv_get_msr(reg);
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| 54 | }
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| 55 |
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| 56 |
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| 57 | #define HV_SMCCC_FUNC_NUMBER 1
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| 58 | #define HV_FUNC_ID ARM_SMCCC_CALL_VAL( \
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| 59 | ARM_SMCCC_STD_CALL, \
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| 60 | ARM_SMCCC_SMC_64, \
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| 61 | ARM_SMCCC_OWNER_VENDOR_HYP, \
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| 62 | HV_SMCCC_FUNC_NUMBER)
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| 63 |
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| 64 | #include <asm-generic/mshyperv.h>
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| 65 |
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| 66 | #endif
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