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Wed, 2 Apr 2025 16:08:02 +0000 Received: from email-imr-corp-prod-iad-1box-1a-9bbde7a3.us-east-1.amazon.com (10.25.36.214) by mail-relay.amazon.com (10.250.64.204) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1544.14 via Frontend Transport; Wed, 2 Apr 2025 16:08:02 +0000 Received: from dev-dsk-kalyazin-1a-a12e27e2.eu-west-1.amazon.com (dev-dsk-kalyazin-1a-a12e27e2.eu-west-1.amazon.com [172.19.103.116]) by email-imr-corp-prod-iad-1box-1a-9bbde7a3.us-east-1.amazon.com (Postfix) with ESMTPS id 84EFE42240; Wed, 2 Apr 2025 16:08:00 +0000 (UTC) From: Nikita Kalyazin To: , , CC: , , , , , , , , , , , , , , , , Subject: [PATCH v2 3/5] mm: userfaultfd: allow to register continue for guest_memfd Date: Wed, 2 Apr 2025 16:07:19 +0000 Message-ID: <20250402160721.97596-4-kalyazin@amazon.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250402160721.97596-1-kalyazin@amazon.com> References: <20250402160721.97596-1-kalyazin@amazon.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Signed-off-by: Nikita Kalyazin --- include/linux/userfaultfd_k.h | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/include/linux/userfaultfd_k.h b/include/linux/userfaultfd_k.h index 75342022d144..bc184edfbb85 100644 --- a/include/linux/userfaultfd_k.h +++ b/include/linux/userfaultfd_k.h @@ -212,6 +212,10 @@ static inline bool userfaultfd_armed(struct vm_area_st= ruct *vma) return vma->vm_flags & __VM_UFFD_FLAGS; } =20 +#ifdef CONFIG_KVM_PRIVATE_MEM +bool kvm_gmem_vma_is_gmem(struct vm_area_struct *vma); +#endif + static inline bool vma_can_userfault(struct vm_area_struct *vma, unsigned long vm_flags, bool wp_async) @@ -222,7 +226,11 @@ static inline bool vma_can_userfault(struct vm_area_st= ruct *vma, return false; =20 if ((vm_flags & VM_UFFD_MINOR) && - (!is_vm_hugetlb_page(vma) && !vma_is_shmem(vma))) + (!is_vm_hugetlb_page(vma) && !vma_is_shmem(vma)) +#ifdef CONFIG_KVM_PRIVATE_MEM + && !kvm_gmem_vma_is_gmem(vma) +#endif + ) return false; =20 /* @@ -244,6 +252,9 @@ static inline bool vma_can_userfault(struct vm_area_str= uct *vma, =20 /* By default, allow any of anon|shmem|hugetlb */ return vma_is_anonymous(vma) || is_vm_hugetlb_page(vma) || +#ifdef CONFIG_KVM_PRIVATE_MEM + kvm_gmem_vma_is_gmem(vma) || +#endif vma_is_shmem(vma); } =20 --=20 2.47.1