From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3C53A289E06 for ; Fri, 27 Mar 2026 14:01:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774620061; cv=none; b=utrMUle0I87N7FMKaB00Fc0sXfnk7KdG3OiwRhCHmlodjW8TNXUYWpWYVB/Neg39GPkfxI8JmqA3QJz5gmhw13QTnsstixt7vQIBkMhd5TKNvnNQFIbll5ICaeO7PAzR4zOPZnNCq013Zzzip+TCiyRzBjBWUJagmKk8rPqZzRg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774620061; c=relaxed/simple; bh=QaZdw+cKvQLXGdg14aZy7asM3jAbDolMGcxEF/Z3CVE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=k+rQHa+k2yUaawH8I4dj+djAgFL8bX0OhiN5AZ+OI1Ai2Ij2wFjucDvp1q7OYzrqIsf7SAF496UIw6KV2jauQaIPDFV3IPlhO8G6wG3LU8RehOFYPRhW1/QMpyoIfuulwv5ls71aZGZOAc3rhjtdAZOhHnpCRP74siQ4w17B3nY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Ycz1wOij; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Ycz1wOij" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3481BC19423; Fri, 27 Mar 2026 14:00:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774620060; bh=QaZdw+cKvQLXGdg14aZy7asM3jAbDolMGcxEF/Z3CVE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ycz1wOijK9lypWq44ZhQ9nW3bypsyhNMcXmAI5YlT4qlcAQdrDVI7SS9wwUnApkGb w70OH21mudmIycY4muSteKOFiWaaDUAcKqckHo8c73d3Tq8ed7ciy6bWDqkFzDLScy m2vPPZesIsuM1KKbTU7gs8JqpobCkm2iIZzpdyZjUitAAB+S4Hk/0cHjXvcQkNVYpK zaQCicTkpJzWEC8yKYxksM5dsROxhgEblujUu/6Ffw1vg7oqG37cwzaakZXOb7rZc7 JH76+hOol4xN5JkK/VNSBDPcIxsu5xDzIdv4dPjKqHbfOz5h4hBpj344VJj0p1MRKV QLAwWKsWSHp2A== From: Will Deacon To: kvmarm@lists.linux.dev Cc: linux-arm-kernel@lists.infradead.org, Will Deacon , Marc Zyngier , Oliver Upton , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Quentin Perret , Fuad Tabba , Vincent Donnefort , Mostafa Saleh , Alexandru Elisei Subject: [PATCH v4 03/38] KVM: arm64: Move handle check into pkvm_pgtable_stage2_destroy_range() Date: Fri, 27 Mar 2026 14:00:02 +0000 Message-ID: <20260327140039.21228-4-will@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260327140039.21228-1-will@kernel.org> References: <20260327140039.21228-1-will@kernel.org> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit When pKVM is enabled, a VM has a 'handle' allocated by the hypervisor in kvm_arch_init_vm() and released later by kvm_arch_destroy_vm(). Consequently, the only time __pkvm_pgtable_stage2_unmap() can run into an uninitialised 'handle' is on the kvm_arch_init_vm() failure path, where we destroy the empty stage-2 page-table if we fail to allocate a handle. Move the handle check into pkvm_pgtable_stage2_destroy_range(), which will additionally handle protected VMs in subsequent patches. Reviewed-by: Fuad Tabba Tested-by: Fuad Tabba Tested-by: Mostafa Saleh Signed-off-by: Will Deacon --- arch/arm64/kvm/pkvm.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/arch/arm64/kvm/pkvm.c b/arch/arm64/kvm/pkvm.c index d7a0f69a9982..7797813f4dbe 100644 --- a/arch/arm64/kvm/pkvm.c +++ b/arch/arm64/kvm/pkvm.c @@ -329,9 +329,6 @@ static int __pkvm_pgtable_stage2_unmap(struct kvm_pgtable *pgt, u64 start, u64 e struct pkvm_mapping *mapping; int ret; - if (!handle) - return 0; - for_each_mapping_in_range_safe(pgt, start, end, mapping) { ret = kvm_call_hyp_nvhe(__pkvm_host_unshare_guest, handle, mapping->gfn, mapping->nr_pages); @@ -347,6 +344,12 @@ static int __pkvm_pgtable_stage2_unmap(struct kvm_pgtable *pgt, u64 start, u64 e void pkvm_pgtable_stage2_destroy_range(struct kvm_pgtable *pgt, u64 addr, u64 size) { + struct kvm *kvm = kvm_s2_mmu_to_kvm(pgt->mmu); + pkvm_handle_t handle = kvm->arch.pkvm.handle; + + if (!handle) + return; + __pkvm_pgtable_stage2_unmap(pgt, addr, addr + size); } -- 2.53.0.1018.g2bb0e51243-goog