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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* svm.h: SVM Architecture related definitions
* Copyright (c) 2005, AMD Corporation.
* Copyright (c) 2004, Intel Corporation.
*
*/
#ifndef __ASM_X86_HVM_SVM_H__
#define __ASM_X86_HVM_SVM_H__
/*
* PV context switch helpers. Prefetching the VMCB area itself has been shown
* to be useful for performance.
*
* Must only be used for NUL FS/GS, as the segment attributes/limits are not
* read from the GDT/LDT.
*/
void svm_load_segs_prefetch(void);
bool svm_load_segs(unsigned int ldt_ents, unsigned long ldt_base,
unsigned long fs_base, unsigned long gs_base,
unsigned long gs_shadow);
extern u32 svm_feature_flags;
#define SVM_FEATURE_NPT 0 /* Nested page table support */
#define SVM_FEATURE_LBRV 1 /* LBR virtualization support */
#define SVM_FEATURE_SVML 2 /* SVM locking MSR support */
#define SVM_FEATURE_NRIPS 3 /* Next RIP save on VMEXIT support */
#define SVM_FEATURE_TSCRATEMSR 4 /* TSC ratio MSR support */
#define SVM_FEATURE_VMCBCLEAN 5 /* VMCB clean bits support */
#define SVM_FEATURE_FLUSHBYASID 6 /* TLB flush by ASID support */
#define SVM_FEATURE_DECODEASSISTS 7 /* Decode assists support */
#define SVM_FEATURE_PAUSEFILTER 10 /* Pause intercept filter support */
#define SVM_FEATURE_PAUSETHRESH 12 /* Pause intercept filter support */
#define SVM_FEATURE_VLOADSAVE 15 /* virtual vmload/vmsave */
#define SVM_FEATURE_VGIF 16 /* Virtual GIF */
#define SVM_FEATURE_SSS 19 /* NPT Supervisor Shadow Stacks */
#define SVM_FEATURE_SPEC_CTRL 20 /* MSR_SPEC_CTRL virtualisation */
#define cpu_has_svm_feature(f) (svm_feature_flags & (1u << (f)))
#define cpu_has_svm_npt cpu_has_svm_feature(SVM_FEATURE_NPT)
#define cpu_has_svm_lbrv cpu_has_svm_feature(SVM_FEATURE_LBRV)
#define cpu_has_svm_svml cpu_has_svm_feature(SVM_FEATURE_SVML)
#define cpu_has_svm_nrips cpu_has_svm_feature(SVM_FEATURE_NRIPS)
#define cpu_has_svm_cleanbits cpu_has_svm_feature(SVM_FEATURE_VMCBCLEAN)
#define cpu_has_svm_flushbyasid cpu_has_svm_feature(SVM_FEATURE_FLUSHBYASID)
#define cpu_has_svm_decode cpu_has_svm_feature(SVM_FEATURE_DECODEASSISTS)
#define cpu_has_svm_vgif cpu_has_svm_feature(SVM_FEATURE_VGIF)
#define cpu_has_pause_filter cpu_has_svm_feature(SVM_FEATURE_PAUSEFILTER)
#define cpu_has_pause_thresh cpu_has_svm_feature(SVM_FEATURE_PAUSETHRESH)
#define cpu_has_tsc_ratio cpu_has_svm_feature(SVM_FEATURE_TSCRATEMSR)
#define cpu_has_svm_vloadsave cpu_has_svm_feature(SVM_FEATURE_VLOADSAVE)
#define cpu_has_svm_sss cpu_has_svm_feature(SVM_FEATURE_SSS)
#define cpu_has_svm_spec_ctrl cpu_has_svm_feature(SVM_FEATURE_SPEC_CTRL)
#endif /* __ASM_X86_HVM_SVM_H__ */
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