[PATCH 05/11] KVM: arm64: Let GICv3 save/restore honor visibility attribute

[Marc Zyngier]

The GICv3 save/restore code never needed any visibility attribute,
but that's about to change. Make vgic_v3_has_cpu_sysregs_attr()
check the visibility in case a register is hidden.

Signed-off-by: Marc Zyngier <maz at kernel.org>
---
 arch/arm64/kvm/vgic-sys-reg-v3.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/kvm/vgic-sys-reg-v3.c b/arch/arm64/kvm/vgic-sys-reg-v3.c
index 5eacb4b3250a1..6f40225c4a3ff 100644
--- a/arch/arm64/kvm/vgic-sys-reg-v3.c
+++ b/arch/arm64/kvm/vgic-sys-reg-v3.c
@@ -341,8 +341,12 @@ static u64 attr_to_id(u64 attr)
 
 int vgic_v3_has_cpu_sysregs_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr)
 {
-	if (get_reg_by_id(attr_to_id(attr->attr), gic_v3_icc_reg_descs,
-			  ARRAY_SIZE(gic_v3_icc_reg_descs)))
+	const struct sys_reg_desc *r;
+
+	r = get_reg_by_id(attr_to_id(attr->attr), gic_v3_icc_reg_descs,
+			  ARRAY_SIZE(gic_v3_icc_reg_descs));
+
+	if (r && !sysreg_hidden(vcpu, r))
 		return 0;
 
 	return -ENXIO;
-- 
2.39.2