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KVM: arm64: Don't WARN from __pkvm_host_share_guest()

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We currently WARN() if the host attempts to share a page that is not in
an acceptable state with a guest. This isn't strictly necessary and
makes testing much harder, so drop the WARN and make sure to propage the
error code instead.

Signed-off-by: Quentin Perret <qperret@google.com>
Link: https://lore.kernel.org/r/20250416160900.3078417-3-qperret@google.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Quentin Perret
2025-04-16 16:08:58 +00:00
committed by Marc Zyngier
parent 74b13d5816
commit 845f126732
1 changed files with 0 additions and 1 deletions
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1
arch/arm64/kvm/hyp/nvhe/mem_protect.c
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@@ -919,7 +919,6 @@ int __pkvm_host_share_guest(u64 pfn, u64 gfn, struct pkvm_hyp_vcpu *vcpu,
if (page->host_share_guest_count)
break;
/* Only host to np-guest multi-sharing is tolerated */
WARN_ON(1);
fallthrough;
default:
ret = -EPERM;