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/* SPDX-License-Identifier: GPL-2.0-only */ /* * X86 specific ACPICA environments and implementation * * Copyright (C) 2014, Intel Corporation * Author: Lv Zheng */ #ifndef _ASM_X86_ACENV_H #define _ASM_X86_ACENV_H #include /* Asm macros */ /* * ACPI_FLUSH_CPU_CACHE() flushes caches on entering sleep states. * It is required to prevent data loss. * * While running inside virtual machine, the kernel can bypass cache flushing. * Changing sleep state in a virtual machine doesn't affect the host system * sleep state and cannot lead to data loss. */ #define ACPI_FLUSH_CPU_CACHE() \ do { \ if (!cpu_feature_enabled(X86_FEATURE_HYPERVISOR)) \ wbinvd(); \ } while (0) int __acpi_acquire_global_lock(unsigned int *lock); int __acpi_release_global_lock(unsigned int *lock); #define ACPI_ACQUIRE_GLOBAL_LOCK(facs, Acq) \ ((Acq) = __acpi_acquire_global_lock(&facs->global_lock)) #define ACPI_RELEASE_GLOBAL_LOCK(facs, Acq) \ ((Acq) = __acpi_release_global_lock(&facs->global_lock)) /* * Math helper asm macros */ #define ACPI_