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: Matt Evans <matt@ozlabs.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 28 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
index 42ac53cebacd..fc41ab3aa114 100644
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@@ -246,6 +246,34 @@ struct thread_struct {
         unsigned long   spefscr;        /* SPE & eFP status */
         int             used_spe;       /* set if process has used 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
         void*           kvm_shadow_vcpu; /* KVM internal data */
 #endif /* CONFIG_KVM_BOOK3S_32_HANDLER */