[PATCH 1/2] KVM: arm64: Fail the idreg iterator if idregs aren't initialized

[Oliver Upton <oliver.upton@linux.dev>]

Return an error to userspace if the VM's ID register values haven't been
initialized in preparation for changing the debugfs file initialization
order.

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
---
 arch/arm64/kvm/sys_regs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 9a0b3a22a9d4..1ebc483c2b0c 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -3434,7 +3434,8 @@ static void *idregs_debug_start(struct seq_file *s, loff_t *pos)
 	mutex_lock(&kvm->arch.config_lock);
 
 	iter = &kvm->arch.idreg_debugfs_iter;
-	if (*iter == (u8)~0) {
+	if (test_bit(KVM_ARCH_FLAG_ID_REGS_INITIALIZED, &kvm->arch.flags) &&
+	    *iter == (u8)~0) {
 		*iter = *pos;
 		if (*iter >= KVM_ARM_ID_REG_NUM)
 			iter = NULL;
-- 
2.44.0.rc1.240.g4c46232300-goog