KVM: PPC: Convert SRR0 and SRR1 to shared page

The SRR0 and SRR1 registers contain cached values of the PC and MSR
respectively. They get written to by the hypervisor when an interrupt
occurs or directly by the kernel. They are also used to tell the rfi(d)
instruction where to jump to.

Because it only gets touched on defined events that, it's very simple to
share with the guest. Hypervisor and guest both have full r/w access.

This patch converts all users of the current field to the shared page.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index 4d46f8b13cc..afa0dd4a27f 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -162,8 +162,8 @@ void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
 
 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
 {
-        vcpu->arch.srr0 = kvmppc_get_pc(vcpu);
-        vcpu->arch.srr1 = vcpu->arch.shared->msr | flags;
+        vcpu->arch.shared->srr0 = kvmppc_get_pc(vcpu);
+        vcpu->arch.shared->srr1 = vcpu->arch.shared->msr | flags;
         kvmppc_set_pc(vcpu, to_book3s(vcpu)->hior + vec);
         vcpu->arch.mmu.reset_msr(vcpu);
 }
@@ -1059,8 +1059,8 @@ int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
         regs->lr = kvmppc_get_lr(vcpu);
         regs->xer = kvmppc_get_xer(vcpu);
         regs->msr = vcpu->arch.shared->msr;
-        regs->srr0 = vcpu->arch.srr0;
-        regs->srr1 = vcpu->arch.srr1;
+        regs->srr0 = vcpu->arch.shared->srr0;
+        regs->srr1 = vcpu->arch.shared->srr1;
         regs->pid = vcpu->arch.pid;
         regs->sprg0 = vcpu->arch.sprg0;
         regs->sprg1 = vcpu->arch.sprg1;
@@ -1086,8 +1086,8 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
         kvmppc_set_lr(vcpu, regs->lr);
         kvmppc_set_xer(vcpu, regs->xer);
         kvmppc_set_msr(vcpu, regs->msr);
-        vcpu->arch.srr0 = regs->srr0;
-        vcpu->arch.srr1 = regs->srr1;
+        vcpu->arch.shared->srr0 = regs->srr0;
+        vcpu->arch.shared->srr1 = regs->srr1;
         vcpu->arch.sprg0 = regs->sprg0;
         vcpu->arch.sprg1 = regs->sprg1;
         vcpu->arch.sprg2 = regs->sprg2;