linux-kernel - [PATCH V2 1/7] vhost-vdpa: count pinned memory

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1720790333-456232-2-git-send-email-steven.sistare@oracle.com>
Date: Fri, 12 Jul 2024 06:18:47 -0700
From: Steve Sistare <steven.sistare@...cle.com>
To: virtualization@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Cc: "Michael S. Tsirkin" <mst@...hat.com>, Jason Wang <jasowang@...hat.com>,
        Si-Wei Liu <si-wei.liu@...cle.com>,
        Eugenio Perez Martin <eperezma@...hat.com>,
        Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
        Dragos Tatulea <dtatulea@...dia.com>,
        Steve Sistare <steven.sistare@...cle.com>
Subject: [PATCH V2 1/7] vhost-vdpa: count pinned memory

Remember the count of pinned memory for the device.

Signed-off-by: Steve Sistare <steven.sistare@...cle.com>
---
 drivers/vhost/vdpa.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 63a53680a85c..963f3704bc39 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -60,6 +60,7 @@ struct vhost_vdpa {
 	struct vdpa_iova_range range;
 	u32 batch_asid;
 	bool suspended;
+	long pinned_vm;
 };
 
 static DEFINE_IDA(vhost_vdpa_ida);
@@ -926,6 +927,7 @@ static void vhost_vdpa_pa_unmap(struct vhost_vdpa *v, struct vhost_iotlb *iotlb,
 			unpin_user_page(page);
 		}
 		atomic64_sub(PFN_DOWN(map->size), &dev->mm->pinned_vm);
+		v->pinned_vm -= PFN_DOWN(map->size);
 		vhost_vdpa_general_unmap(v, map, asid);
 		vhost_iotlb_map_free(iotlb, map);
 	}
@@ -1009,9 +1011,10 @@ static int vhost_vdpa_map(struct vhost_vdpa *v, struct vhost_iotlb *iotlb,
 		return r;
 	}
 
-	if (!vdpa->use_va)
+	if (!vdpa->use_va) {
 		atomic64_add(PFN_DOWN(size), &dev->mm->pinned_vm);
-
+		v->pinned_vm += PFN_DOWN(size);
+	}
 	return 0;
 }
 
-- 
2.39.3