[PATCH 16/28] KVM: arm64: Split NV-specific exit fixups from the non-NV handling

[Marc Zyngier]

In order to facilitate further changes, move the NV handling of
early fixups in its own helper. This also makes the code slightly
simpler to parse.

Signed-off-by: Marc Zyngier <maz at kernel.org>
---
 arch/arm64/kvm/hyp/vhe/switch.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/arch/arm64/kvm/hyp/vhe/switch.c b/arch/arm64/kvm/hyp/vhe/switch.c
index 361d3f8344dd8..8268779df4fa9 100644
--- a/arch/arm64/kvm/hyp/vhe/switch.c
+++ b/arch/arm64/kvm/hyp/vhe/switch.c
@@ -537,18 +537,15 @@ static const exit_handler_fn hyp_exit_handlers[] = {
 	[0x3F]				= kvm_hyp_handle_impdef,
 };
 
-static inline bool fixup_guest_exit(struct kvm_vcpu *vcpu, u64 *exit_code)
+static void fixup_nv_guest_exit(struct kvm_vcpu *vcpu)
 {
-	synchronize_vcpu_pstate(vcpu);
-
 	/*
 	 * If we were in HYP context on entry, adjust the PSTATE view
 	 * so that the usual helpers work correctly. This enforces our
 	 * invariant that the guest's HYP context status is preserved
 	 * across a run.
 	 */
-	if (vcpu_has_nv(vcpu) &&
-	    unlikely(host_data_test_flag(VCPU_IN_HYP_CONTEXT))) {
+	if (unlikely(host_data_test_flag(VCPU_IN_HYP_CONTEXT))) {
 		u64 mode = *vcpu_cpsr(vcpu) & (PSR_MODE_MASK | PSR_MODE32_BIT);
 
 		switch (mode) {
@@ -565,8 +562,15 @@ static inline bool fixup_guest_exit(struct kvm_vcpu *vcpu, u64 *exit_code)
 	}
 
 	/* Apply extreme paranoia! */
-	BUG_ON(vcpu_has_nv(vcpu) &&
-	       !!host_data_test_flag(VCPU_IN_HYP_CONTEXT) != is_hyp_ctxt(vcpu));
+	BUG_ON(!!host_data_test_flag(VCPU_IN_HYP_CONTEXT) != is_hyp_ctxt(vcpu));
+}
+
+static bool fixup_guest_exit(struct kvm_vcpu *vcpu, u64 *exit_code)
+{
+	synchronize_vcpu_pstate(vcpu);
+
+	if (vcpu_has_nv(vcpu))
+		fixup_nv_guest_exit(vcpu);
 
 	return __fixup_guest_exit(vcpu, exit_code, hyp_exit_handlers);
 }
-- 
2.47.3