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Mon, 3 Mar 2025 13:30:54 +0000 Received: from EX19MTAUWC002.ant.amazon.com (10.250.64.143) by EX19D020UWC002.ant.amazon.com (10.13.138.147) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1544.14; Mon, 3 Mar 2025 13:30:54 +0000 Received: from email-imr-corp-prod-iad-all-1b-8410187a.us-east-1.amazon.com (10.25.36.210) by mail-relay.amazon.com (10.250.64.149) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1544.14 via Frontend Transport; Mon, 3 Mar 2025 13:30:54 +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-all-1b-8410187a.us-east-1.amazon.com (Postfix) with ESMTPS id 77107406A9; Mon, 3 Mar 2025 13:30:52 +0000 (UTC) From: Nikita Kalyazin To: , , CC: , , , , , , , , , , , , , , , , Subject: [RFC PATCH 3/5] mm: userfaultfd: allow to register userfaultfd for guest_memfd Date: Mon, 3 Mar 2025 13:30:09 +0000 Message-ID: <20250303133011.44095-4-kalyazin@amazon.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250303133011.44095-1-kalyazin@amazon.com> References: <20250303133011.44095-1-kalyazin@amazon.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 862CA18002B X-Rspam-User: X-Stat-Signature: e1negzdzoxfu17af8i9acsjpqtp1d5xe X-HE-Tag: 1741008657-346788 X-HE-Meta: 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 Rm0aZuYH 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Signed-off-by: Nikita Kalyazin --- include/linux/userfaultfd_k.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/linux/userfaultfd_k.h b/include/linux/userfaultfd_k.h index 75342022d144..440d38903359 100644 --- a/include/linux/userfaultfd_k.h +++ b/include/linux/userfaultfd_k.h @@ -20,6 +20,10 @@ #include #include +#ifdef CONFIG_KVM_PRIVATE_MEM +bool kvm_gmem_vma_is_gmem(struct vm_area_struct *vma); +#endif + /* The set of all possible UFFD-related VM flags. */ #define __VM_UFFD_FLAGS (VM_UFFD_MISSING | VM_UFFD_WP | VM_UFFD_MINOR) @@ -242,6 +246,11 @@ static inline bool vma_can_userfault(struct vm_area_struct *vma, return false; #endif +#ifdef CONFIG_KVM_PRIVATE_MEM + if (kvm_gmem_vma_is_gmem(vma)) + return true; +#endif + /* By default, allow any of anon|shmem|hugetlb */ return vma_is_anonymous(vma) || is_vm_hugetlb_page(vma) || vma_is_shmem(vma); -- 2.47.1