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KVM: arm64: Fix meta-page unsharing in pKVM hyp tracing

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As the hyp_trace_buffer_unshare_hyp() function name suggests we should
unshare all the previously shared pages, otherwise we leak hyp-shared
pages which won't be reusable for hyp memory.

Fix the typo by calling __unshare_page() on the meta-page, ensuring all
previously shared pages are correctly unshared.

Fixes: 3aed038aac ("KVM: arm64: Add trace remote for the nVHE/pKVM hyp")
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
Link: https://patch.msgid.link/20260521124613.911067-2-vdonnefort@google.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Vincent Donnefort 2026-05-21 13:46:11 +01:00 committed by Marc Zyngier
parent 1750ad1388
commit 0f7abb6eaa
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/kvm/hyp_trace.c
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@ -189,7 +189,7 @@ static void hyp_trace_buffer_unshare_hyp(struct hyp_trace_buffer *trace_buffer,
if (cpu > last_cpu)
break;
__share_page(rb_desc->meta_va);
__unshare_page(rb_desc->meta_va);
for (p = 0; p < rb_desc->nr_page_va; p++)
__unshare_page(rb_desc->page_va[p]);
}