ARM: KVM: abstract IL decoding away

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>

4 files changed, 9 insertions, 4 deletions

diff --git a/arch/arm/include/asm/kvm_emulate.h b/arch/arm/include/asm/kvm_emulate.h
index e4a4fc2f9156..a9b853f35aed 100644
--- a/arch/arm/include/asm/kvm_emulate.h
+++ b/arch/arm/include/asm/kvm_emulate.h
@@ -136,4 +136,10 @@ static inline int kvm_vcpu_dabt_get_as(struct kvm_vcpu *vcpu)
         }
 }
 
+/* This one is not specific to Data Abort */
+static inline bool kvm_vcpu_trap_il_is32bit(struct kvm_vcpu *vcpu)
+{
+        return kvm_vcpu_get_hsr(vcpu) & HSR_IL;
+}
+
 #endif /* __ARM_KVM_EMULATE_H__ */
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index 6626c7e62371..31616336255c 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -624,8 +624,7 @@ static int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
                  * that fail their condition code check"
                  */
                 if (!kvm_condition_valid(vcpu)) {
-                        bool is_wide = kvm_vcpu_get_hsr(vcpu) & HSR_IL;
-                        kvm_skip_instr(vcpu, is_wide);
+                        kvm_skip_instr(vcpu, kvm_vcpu_trap_il_is32bit(vcpu));
                         return 1;
                 }
 
diff --git a/arch/arm/kvm/coproc.c b/arch/arm/kvm/coproc.c
index b30591615da4..94eee8befc83 100644
--- a/arch/arm/kvm/coproc.c
+++ b/arch/arm/kvm/coproc.c
@@ -293,7 +293,7 @@ static int emulate_cp15(struct kvm_vcpu *vcpu,
 
                 if (likely(r->access(vcpu, params, r))) {
                         /* Skip instruction, since it was emulated */
-                        kvm_skip_instr(vcpu, (kvm_vcpu_get_hsr(vcpu) >> 25) & 1);
+                        kvm_skip_instr(vcpu, kvm_vcpu_trap_il_is32bit(vcpu));
                         return 1;
                 }
                 /* If access function fails, it should complain. */
diff --git a/arch/arm/kvm/mmio.c b/arch/arm/kvm/mmio.c
index 0b8f49985b70..02ca76555bd4 100644
--- a/arch/arm/kvm/mmio.c
+++ b/arch/arm/kvm/mmio.c
@@ -101,7 +101,7 @@ static int decode_hsr(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
          * The MMIO instruction is emulated and should not be re-executed
          * in the guest.
          */
-        kvm_skip_instr(vcpu, (kvm_vcpu_get_hsr(vcpu) >> 25) & 1);
+        kvm_skip_instr(vcpu, kvm_vcpu_trap_il_is32bit(vcpu));
         return 0;
 }