mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
feba84c2c9
These non-nested msr and fast hypercall functions are present in x86, but they must be available in both architectures for the root partition driver code. While at it, remove the redundant 'extern' keywords from the hv_do_hypercall() variants in asm-generic/mshyperv.h. Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com> Reviewed-by: Stanislav Kinsburskii <skinsburskii@linux.microsoft.com> Reviewed-by: Roman Kisel <romank@linux.microsoft.com> Link: https://lore.kernel.org/r/1741980536-3865-4-git-send-email-nunodasneves@linux.microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <1741980536-3865-4-git-send-email-nunodasneves@linux.microsoft.com>
66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
/* 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 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) 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 <hyperv/hvhdk.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_msr(unsigned int reg, u64 value)
|
|
{
|
|
hv_set_vpreg(reg, value);
|
|
}
|
|
|
|
static inline u64 hv_get_msr(unsigned int reg)
|
|
{
|
|
return hv_get_vpreg(reg);
|
|
}
|
|
|
|
/*
|
|
* Nested is not supported on arm64
|
|
*/
|
|
static inline void hv_set_non_nested_msr(unsigned int reg, u64 value)
|
|
{
|
|
hv_set_msr(reg, value);
|
|
}
|
|
|
|
static inline u64 hv_get_non_nested_msr(unsigned int reg)
|
|
{
|
|
return hv_get_msr(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
|