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Sun, 06 Jul 2025 23:50:29 -0700 (PDT) From: lizhe.67@bytedance.com To: alex.williamson@redhat.com, akpm@linux-foundation.org, david@redhat.com, jgg@ziepe.ca, peterx@redhat.com Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lizhe.67@bytedance.com Subject: [PATCH v3 4/5] vfio/type1: introduce a new member has_rsvd for struct vfio_dma Date: Mon, 7 Jul 2025 14:49:49 +0800 Message-ID: <20250707064950.72048-5-lizhe.67@bytedance.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20250707064950.72048-1-lizhe.67@bytedance.com> References: <20250707064950.72048-1-lizhe.67@bytedance.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Queue-Id: 8EF2240007 X-Rspamd-Server: rspam09 X-Stat-Signature: 3qa8b5cu7w4giamzpx7smi9hrnc6je67 X-HE-Tag: 1751871030-594241 X-HE-Meta: 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 sUqa8fTZ oxzbq5e491/JZGkTD9PwoU6K8+FmFl9mW7uBdCemfEJ5YImNwEDNDK5cTosLU4oMX+O3k1r4eOvegXCB8oFmLUP7JSCM57Gx9zMQ6+uzue4/jtMMpjZ37+OxqkQ== 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: From: Li Zhe Introduce a new member has_rsvd for struct vfio_dma. This member is used to indicate whether there are any reserved or invalid pfns in the region represented by this vfio_dma. If it is true, it indicates that there is at least one pfn in this region that is either reserved or invalid. Reviewed-by: David Hildenbrand Signed-off-by: Li Zhe --- drivers/vfio/vfio_iommu_type1.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index b770eb1c4e07..13c5667d431c 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -92,6 +92,7 @@ struct vfio_dma { bool iommu_mapped; bool lock_cap; /* capable(CAP_IPC_LOCK) */ bool vaddr_invalid; + bool has_rsvd; /* has 1 or more rsvd pfns */ struct task_struct *task; struct rb_root pfn_list; /* Ex-user pinned pfn list */ unsigned long *bitmap; @@ -774,6 +775,7 @@ static long vfio_pin_pages_remote(struct vfio_dma *dma, unsigned long vaddr, } out: + dma->has_rsvd |= rsvd; ret = vfio_lock_acct(dma, lock_acct, false); unpin_out: -- 2.20.1