KVM: arm64: Simplify handling of absent PMU system registers

Now that all PMU registers are gated behind a .visibility callback,
remove the other checks against an absent PMU.

Signed-off-by: Marc Zyngier <maz@kernel.org>

diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 45f4ae7..93f0a4a 100644 (file)
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -622,9 +622,8 @@ static void reset_pmcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r)
 static bool check_pmu_access_disabled(struct kvm_vcpu *vcpu, u64 flags)
 {
        u64 reg = __vcpu_sys_reg(vcpu, PMUSERENR_EL0);
-       bool enabled = kvm_vcpu_has_pmu(vcpu);
+       bool enabled = (reg & flags) || vcpu_mode_priv(vcpu);
 
-       enabled &= (reg & flags) || vcpu_mode_priv(vcpu);
        if (!enabled)
                kvm_inject_undefined(vcpu);
 
@@ -909,11 +908,6 @@ static bool access_pmswinc(struct kvm_vcpu *vcpu, struct sys_reg_params *p,
 static bool access_pmuserenr(struct kvm_vcpu *vcpu, struct sys_reg_params *p,
                             const struct sys_reg_desc *r)
 {
-       if (!kvm_vcpu_has_pmu(vcpu)) {
-               kvm_inject_undefined(vcpu);
-               return false;
-       }
-
        if (p->is_write) {
                if (!vcpu_mode_priv(vcpu)) {
                        kvm_inject_undefined(vcpu);