KVM: PPC: Book3S PR: Add new kvmppc_copyto/from_vcpu_tm APIs

This patch adds 2 new APIs: kvmppc_copyto_vcpu_tm() and
kvmppc_copyfrom_vcpu_tm().  These 2 APIs will be used to copy from/to TM
data between VCPU_TM/VCPU area.

PR KVM will use these APIs for treclaim. or trechkpt. emulation.

Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>

1 files changed, 41 insertions, 0 deletions

diff --git a/arch/powerpc/kvm/book3s_emulate.c b/arch/powerpc/kvm/book3s_emulate.c
index 2eb457bc7b6e..f81a921e0865 100644
--- a/arch/powerpc/kvm/book3s_emulate.c
+++ b/arch/powerpc/kvm/book3s_emulate.c
@@ -87,6 +87,47 @@ static bool spr_allowed(struct kvm_vcpu *vcpu, enum priv_level level)
         return true;
 }
 
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+static inline void kvmppc_copyto_vcpu_tm(struct kvm_vcpu *vcpu)
+{
+        memcpy(&vcpu->arch.gpr_tm[0], &vcpu->arch.regs.gpr[0],
+                        sizeof(vcpu->arch.gpr_tm));
+        memcpy(&vcpu->arch.fp_tm, &vcpu->arch.fp,
+                        sizeof(struct thread_fp_state));
+        memcpy(&vcpu->arch.vr_tm, &vcpu->arch.vr,
+                        sizeof(struct thread_vr_state));
+        vcpu->arch.ppr_tm = vcpu->arch.ppr;
+        vcpu->arch.dscr_tm = vcpu->arch.dscr;
+        vcpu->arch.amr_tm = vcpu->arch.amr;
+        vcpu->arch.ctr_tm = vcpu->arch.regs.ctr;
+        vcpu->arch.tar_tm = vcpu->arch.tar;
+        vcpu->arch.lr_tm = vcpu->arch.regs.link;
+        vcpu->arch.cr_tm = vcpu->arch.cr;
+        vcpu->arch.xer_tm = vcpu->arch.regs.xer;
+        vcpu->arch.vrsave_tm = vcpu->arch.vrsave;
+}
+
+static inline void kvmppc_copyfrom_vcpu_tm(struct kvm_vcpu *vcpu)
+{
+        memcpy(&vcpu->arch.regs.gpr[0], &vcpu->arch.gpr_tm[0],
+                        sizeof(vcpu->arch.regs.gpr));
+        memcpy(&vcpu->arch.fp, &vcpu->arch.fp_tm,
+                        sizeof(struct thread_fp_state));
+        memcpy(&vcpu->arch.vr, &vcpu->arch.vr_tm,
+                        sizeof(struct thread_vr_state));
+        vcpu->arch.ppr = vcpu->arch.ppr_tm;
+        vcpu->arch.dscr = vcpu->arch.dscr_tm;
+        vcpu->arch.amr = vcpu->arch.amr_tm;
+        vcpu->arch.regs.ctr = vcpu->arch.ctr_tm;
+        vcpu->arch.tar = vcpu->arch.tar_tm;
+        vcpu->arch.regs.link = vcpu->arch.lr_tm;
+        vcpu->arch.cr = vcpu->arch.cr_tm;
+        vcpu->arch.regs.xer = vcpu->arch.xer_tm;
+        vcpu->arch.vrsave = vcpu->arch.vrsave_tm;
+}
+
+#endif
+
 int kvmppc_core_emulate_op_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
                               unsigned int inst, int *advance)
 {