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54820530c5
Some Power9 revisions can run in a mode where TM operates without suspended state. If we find ourself on a CPU that might be in this mode, we query OPAL to check, and if so we reenable TM in CPU features, and enable a new user feature to signal to userspace that we are in this mode. We do not enable the "normal" user feature, PPC_FEATURE2_HTM, but we do enable PPC_FEATURE2_HTM_NOSC because that indicates to userspace that the kernel will abort transactions on syscall entry, which is true regardless of the suspend mode. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
24 lines
706 B
C
24 lines
706 B
C
/*
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* Transactional memory support routines to reclaim and recheckpoint
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* transactional process state.
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*
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* Copyright 2012 Matt Evans & Michael Neuling, IBM Corporation.
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*/
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#include <uapi/asm/tm.h>
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#ifndef __ASSEMBLY__
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extern void tm_enable(void);
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extern void tm_reclaim(struct thread_struct *thread,
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unsigned long orig_msr, uint8_t cause);
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extern void tm_reclaim_current(uint8_t cause);
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extern void tm_recheckpoint(struct thread_struct *thread,
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unsigned long orig_msr);
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extern void tm_abort(uint8_t cause);
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extern void tm_save_sprs(struct thread_struct *thread);
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extern void tm_restore_sprs(struct thread_struct *thread);
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extern bool tm_suspend_disabled;
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#endif /* __ASSEMBLY__ */
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