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>

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Fuad Tabba 2026-06-18 13:16:37 +01:00 • committed by Marc Zyngier

parent 265b58aba5

commit daa71eca24

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arch/arm64/kvm/hyp/nvhe/sys_regs.c

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