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/* SPDX-License-Identifier: GPL-2.0 */
/* x86-specific clocksource additions */
#ifndef _ASM_X86_CLOCKSOURCE_H
#define _ASM_X86_CLOCKSOURCE_H
#define VCLOCK_NONE 0 /* No vDSO clock available. */
#define VCLOCK_TSC 1 /* vDSO should use vread_tsc. */
#define VCLOCK_PVCLOCK 2 /* vDSO should use vread_pvclock. */
#define VCLOCK_HVCLOCK 3 /* vDSO should use vread_hvclock. */
#define VCLOCK_MAX 3
struct arch_clocksource_data {
int vclock_mode;
};
extern unsigned int vclocks_used;
static inline bool vclock_was_used(int vclock)
{
return READ_ONCE(vclocks_used) & (1U << vclock);
}
static inline void vclocks_set_used(unsigned int which)
{
WRITE_ONCE(vclocks_used, READ_ONCE(vclocks_used) | (1 << which));
}
#endif /* _ASM_X86_CLOCKSOURCE_H */
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