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KVM: arm64: Set ESR_ELx.IL for injected undefined exceptions at EL2

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inject_undef64() constructs an ESR with EC=0 (Unknown) but does not set
IL. The architecture mandates IL=1 for EC=0 unconditionally (ARM DDI
0487, ESR_ELx.IL description), so the injected syndrome is one that
conforming hardware cannot produce.

Set ESR_ELx_IL in the constructed syndrome.

Fixes: e5d40a5a97 ("KVM: arm64: pkvm: Add a generic synchronous exception injection primitive")
Reported-by: sashiko <sashiko@sashiko.dev>
Signed-off-by: Fuad Tabba <tabba@google.com>
Link: https://patch.msgid.link/20260618121643.4105064-2-tabba@google.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Fuad Tabba 2026-06-18 13:16:37 +01:00 committed by Marc Zyngier
parent 265b58aba5
commit daa71eca24
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/kvm/hyp/nvhe/sys_regs.c
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@ -279,7 +279,7 @@ static void inject_sync64(struct kvm_vcpu *vcpu, u64 esr)
*/
static void inject_undef64(struct kvm_vcpu *vcpu)
{
inject_sync64(vcpu, (ESR_ELx_EC_UNKNOWN << ESR_ELx_EC_SHIFT));
inject_sync64(vcpu, (ESR_ELx_EC_UNKNOWN << ESR_ELx_EC_SHIFT) | ESR_ELx_IL);
}
static u64 read_id_reg(const struct kvm_vcpu *vcpu,