arm64: KVM: 32bit conditional execution emulation
As conditional instructions can trap on AArch32, add the thinest
possible emulation layer to keep 32bit guests happy.
Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h
index 20a1a39..eec0738 100644
--- a/arch/arm64/include/asm/kvm_emulate.h
+++ b/arch/arm64/include/asm/kvm_emulate.h
@@ -31,6 +31,9 @@
unsigned long *vcpu_reg32(const struct kvm_vcpu *vcpu, u8 reg_num);
unsigned long *vcpu_spsr32(const struct kvm_vcpu *vcpu);
+bool kvm_condition_valid32(const struct kvm_vcpu *vcpu);
+void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr);
+
void kvm_inject_undefined(struct kvm_vcpu *vcpu);
void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr);
void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr);
@@ -57,12 +60,18 @@
static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
{
- return true; /* No conditionals on arm64 */
+ if (vcpu_mode_is_32bit(vcpu))
+ return kvm_condition_valid32(vcpu);
+
+ return true;
}
static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
{
- *vcpu_pc(vcpu) += 4;
+ if (vcpu_mode_is_32bit(vcpu))
+ kvm_skip_instr32(vcpu, is_wide_instr);
+ else
+ *vcpu_pc(vcpu) += 4;
}
static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)