[PATCH 3/3] KVM: arm64: nv: Inject a SEA if failed to read the descriptor

[Zenghui Yu]

From: "Zenghui Yu (Huawei)" <zenghui.yu at linux.dev>

Failure to read the descriptor (because it is outside of a memslot) should
result in a SEA being injected in the guest.

Suggested-by: Marc Zyngier <maz at kernel.org>
Link: https://lore.kernel.org/r/86ms1m9lp3.wl-maz@kernel.org
Signed-off-by: Zenghui Yu (Huawei) <zenghui.yu at linux.dev>
---
 arch/arm64/kvm/nested.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/kvm/nested.c b/arch/arm64/kvm/nested.c
index a957542ae3c2..79e6091b738f 100644
--- a/arch/arm64/kvm/nested.c
+++ b/arch/arm64/kvm/nested.c
@@ -296,8 +296,10 @@ static int walk_nested_s2_pgd(struct kvm_vcpu *vcpu, phys_addr_t ipa,
 
 		paddr = base_addr | index;
 		ret = read_guest_s2_desc(vcpu, paddr, &desc, wi);
-		if (ret < 0)
+		if (ret < 0) {
+			out->esr = ESR_ELx_FSC_SEA_TTW(level);
 			return ret;
+		}
 
 		new_desc = desc;
 
-- 
2.53.0