[PATCH v2 7/7] KVM: arm64: Set IL in fake ESR for pKVM memory sharing exit
From: Fuad Tabba
Date: Thu Jun 18 2026 - 08:19:49 EST
__pkvm_memshare_page_req() constructs a fake DABT ESR_EL2 to exit to
the host without setting IL. The ESR has ISV=0, so IL must be 1 per the
architecture. The host does not read IL on this path, but the
constructed syndrome should still be architecturally valid.
Set ESR_ELx_IL.
Fixes: 03313efed5e2 ("KVM: arm64: Implement the MEM_SHARE hypercall for protected VMs")
Signed-off-by: Fuad Tabba <tabba@xxxxxxxxxx>
---
arch/arm64/kvm/hyp/nvhe/pkvm.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/kvm/hyp/nvhe/pkvm.c b/arch/arm64/kvm/hyp/nvhe/pkvm.c
index eb1c10120f9f..c982a3a04c37 100644
--- a/arch/arm64/kvm/hyp/nvhe/pkvm.c
+++ b/arch/arm64/kvm/hyp/nvhe/pkvm.c
@@ -1054,7 +1054,8 @@ static u64 __pkvm_memshare_page_req(struct kvm_vcpu *vcpu, u64 ipa)
/* Fake up a data abort (level 3 translation fault on write) */
vcpu->arch.fault.esr_el2 = (ESR_ELx_EC_DABT_LOW << ESR_ELx_EC_SHIFT) |
- ESR_ELx_WNR | ESR_ELx_FSC_FAULT |
+ ESR_ELx_IL | ESR_ELx_WNR |
+ ESR_ELx_FSC_FAULT |
FIELD_PREP(ESR_ELx_FSC_LEVEL, 3);
/* Shuffle the IPA around into the HPFAR */
--
2.54.0.1189.g8c84645362-goog