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Thu, 10 Jul 2025 01:54:25 -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 v4 4/5] vfio/type1: introduce a new member has_rsvd for struct vfio_dma Date: Thu, 10 Jul 2025 16:53:54 +0800 Message-ID: <20250710085355.54208-5-lizhe.67@bytedance.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20250710085355.54208-1-lizhe.67@bytedance.com> References: <20250710085355.54208-1-lizhe.67@bytedance.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: BCF31C0005 X-Stat-Signature: pnuud5mimckgs1eyn7ahbz1ejseguhtf X-HE-Tag: 1752137666-729108 X-HE-Meta: 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 j1A/3bqG 1UEZehj0TjKQlki2agCHyYvgj9e9o1zD1dE2pClTjNLRBv8IwuuaO+vCbB244REt+XXQjMq02lEefdMw= 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. Signed-off-by: Li Zhe Reviewed-by: David Hildenbrand --- 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 cade7ac25eea..61455d725412 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