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[v2,2/4] KVM: arm64: Don't WARN from __pkvm_host_share_guest()

Message ID 20250225015327.3708420-3-qperret@google.com (mailing list archive)
State New
Headers show
Series Selftest for pKVM ownership transitions | expand

Commit Message

Quentin Perret Feb. 25, 2025, 1:53 a.m. UTC 
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 fix the error code.

Signed-off-by: Quentin Perret <qperret@google.com>
---
 arch/arm64/kvm/hyp/nvhe/mem_protect.c | 1 -
 1 file changed, 1 deletion(-)
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Patch

diff --git a/arch/arm64/kvm/hyp/nvhe/mem_protect.c b/arch/arm64/kvm/hyp/nvhe/mem_protect.c
index 19c3c631708c..ae39abc7e604 100644
--- a/arch/arm64/kvm/hyp/nvhe/mem_protect.c
+++ b/arch/arm64/kvm/hyp/nvhe/mem_protect.c
@@ -912,7 +912,6 @@  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;