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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Linux-specific definitions for managing interactions with Microsoft's
* Hyper-V hypervisor. The definitions in this file are specific to
* the ARM64 architecture. See include/asm-generic/mshyperv.h for
* definitions are that architecture independent.
*
* 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.
*
* Copyright (C) 2021, Microsoft, Inc.
*
* Author : Michael Kelley <mikelley@microsoft.com>
*/
#ifndef _ASM_MSHYPERV_H
#define _ASM_MSHYPERV_H
#include <linux/types.h>
#include <linux/arm-smccc.h>
#include <asm/hyperv-tlfs.h>
/*
* Declare calls to get and set Hyper-V VP register values on ARM64, which
* requires a hypercall.
*/
void hv_set_vpreg(u32 reg, u64 value);
u64 hv_get_vpreg(u32 reg);
void hv_get_vpreg_128(u32 reg, struct hv_get_vp_registers_output *result);
static inline void hv_set_register(unsigned int reg, u64 value)
{
hv_set_vpreg(reg, value);
}
static inline u64 hv_get_register(unsigned int reg)
{
return hv_get_vpreg(reg);
}
/* SMCCC hypercall parameters */
#define HV_SMCCC_FUNC_NUMBER 1
#define HV_FUNC_ID ARM_SMCCC_CALL_VAL( \
ARM_SMCCC_STD_CALL, \
ARM_SMCCC_SMC_64, \
ARM_SMCCC_OWNER_VENDOR_HYP, \
HV_SMCCC_FUNC_NUMBER)
#include <asm-generic/mshyperv.h>
#endif