KVM: arm64: nv: Restart stage-1 walk if stage-2 desc update fails

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kvm_walk_nested_s2() returns -EAGAIN as an indication that an underlying
descriptor update fails due to a race. The expectation is that the
caller restart translation, yet walk_s1() actually synthesizes an abort.

Propagate the -EAGAIN return out of walk_s1(), relying on callers to
restart the translation fetch.

Fixes: e4c7dfac2f ("KVM: arm64: nv: Implement HW access flag management in stage-2 SW PTW")
Signed-off-by: Oliver Upton <oupton@kernel.org>
Link: https://patch.msgid.link/20260602235450.103057-6-oupton@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>

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Oliver Upton 2026-06-02 16:54:50 -07:00 • committed by Marc Zyngier

parent 699a2cc7f6

commit d8839941df

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arch/arm64/kvm/at.c

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