The current check_ext function reads the instruction and then does
the checking. Let's split the reading out so we can reuse it for
different functions.
Signed-off-by: Alexander Graf <agraf@xxxxxxx>
---
arch/powerpc/kvm/book3s.c | 24 ++++++++++++++++--------
1 files changed, 16 insertions(+), 8 deletions(-)
diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index 9e0bc47..400ae0a 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -650,26 +650,34 @@ void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr)
kvmppc_recalc_shadow_msr(vcpu);
}
-static int kvmppc_check_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr)
+static int kvmppc_read_inst(struct kvm_vcpu *vcpu)
{
ulong srr0 = vcpu->arch.pc;
int ret;
- /* Need to do paired single emulation? */
- if (!(vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE))
- return EMULATE_DONE;
-
- /* Read out the instruction */
ret = kvmppc_ld(vcpu, &srr0, sizeof(u32), &vcpu->arch.last_inst, false);
if (ret == -ENOENT) {
vcpu->arch.msr = kvmppc_set_field(vcpu->arch.msr, 33, 33, 1);
vcpu->arch.msr = kvmppc_set_field(vcpu->arch.msr, 34, 36, 0);
vcpu->arch.msr = kvmppc_set_field(vcpu->arch.msr, 42, 47, 0);
kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
- } else if(ret == EMULATE_DONE) {
+ return EMULATE_AGAIN;
+ }
+
+ return EMULATE_DONE;
+}
+
+static int kvmppc_check_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr)
+{
+
+ /* Need to do paired single emulation? */
+ if (!(vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE))
+ return EMULATE_DONE;
+
+ /* Read out the instruction */
+ if (kvmppc_read_inst(vcpu) == EMULATE_DONE)
/* Need to emulate */
return EMULATE_FAIL;
- }
return EMULATE_AGAIN;
}
--
1.6.0.2
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