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Commit f4c3aff2 authored by Michael Neuling's avatar Michael Neuling Committed by Benjamin Herrenschmidt
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powerpc: Add additional state needed for transactional memory to thread struct 



Set of new archtected state for saving away on context switch.

Signed-off-by: default avatarMatt Evans <matt@ozlabs.org>
Signed-off-by: default avatarMichael Neuling <mikey@neuling.org>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 14c39a4c

arch/powerpc/include/asm/processor.h

+28 −0
Original line number Original line Diff line number Diff line
@@ -246,6 +246,34 @@ struct thread_struct { 
	unsigned long	spefscr;	/* SPE & eFP status */

	unsigned long	spefscr;	/* SPE & eFP status */

	int		used_spe;	/* set if process has used spe */

	int		used_spe;	/* set if process has used spe */

#endif /* CONFIG_SPE */

#endif /* CONFIG_SPE */

#ifdef CONFIG_PPC_TRANSACTIONAL_MEM

	u64		tm_tfhar;	/* Transaction fail handler addr */

	u64		tm_texasr;	/* Transaction exception & summary */

	u64		tm_tfiar;	/* Transaction fail instr address reg */

	unsigned long	tm_orig_msr;	/* Thread's MSR on ctx switch */

	struct pt_regs	ckpt_regs;	/* Checkpointed registers */



	/*

	 * Transactional FP and VSX 0-31 register set.

	 * NOTE: the sense of these is the opposite of the integer ckpt_regs!

	 *

	 * When a transaction is active/signalled/scheduled etc., *regs is the

	 * most recent set of/speculated GPRs with ckpt_regs being the older

	 * checkpointed regs to which we roll back if transaction aborts.

	 *

	 * However, fpr[] is the checkpointed 'base state' of FP regs, and

	 * transact_fpr[] is the new set of transactional values.

	 * VRs work the same way.

	 */

	double		transact_fpr[32][TS_FPRWIDTH];

	struct {

		unsigned int pad;

		unsigned int val;	/* Floating point status */

	} transact_fpscr;

	vector128	transact_vr[32] __attribute__((aligned(16)));

	vector128	transact_vscr __attribute__((aligned(16)));

	unsigned long	transact_vrsave;

#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */

#ifdef CONFIG_KVM_BOOK3S_32_HANDLER

#ifdef CONFIG_KVM_BOOK3S_32_HANDLER

	void*		kvm_shadow_vcpu; /* KVM internal data */

	void*		kvm_shadow_vcpu; /* KVM internal data */

#endif /* CONFIG_KVM_BOOK3S_32_HANDLER */

#endif /* CONFIG_KVM_BOOK3S_32_HANDLER */