From: Yan Zhao <yan.y.zhao@intel.com>
To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: alex.williamson@redhat.com, cohuck@redhat.com,
zhenyuw@linux.intel.com, zhi.a.wang@intel.com,
kevin.tian@intel.com, shaopeng.he@intel.com, yi.l.liu@intel.com,
xin.zeng@intel.com, hang.yuan@intel.com,
Yan Zhao <yan.y.zhao@intel.com>
Subject: [RFC PATCH v4 05/10] vfio/pci: export vfio_pci_get_barmap
Date: Sun, 17 May 2020 22:50:16 -0400 [thread overview]
Message-ID: <20200518025016.14317-1-yan.y.zhao@intel.com> (raw)
In-Reply-To: <20200518024202.13996-1-yan.y.zhao@intel.com>
This allows vendor driver to read/write to bars directly which is useful
in security checking condition.
Cc: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Yan Zhao <yan.y.zhao@intel.com>
---
drivers/vfio/pci/vfio_pci_rdwr.c | 10 ++++++++++
include/linux/vfio.h | 1 +
2 files changed, 11 insertions(+)
diff --git a/drivers/vfio/pci/vfio_pci_rdwr.c b/drivers/vfio/pci/vfio_pci_rdwr.c
index a87992892a9f..e4085311ab28 100644
--- a/drivers/vfio/pci/vfio_pci_rdwr.c
+++ b/drivers/vfio/pci/vfio_pci_rdwr.c
@@ -153,6 +153,16 @@ static int vfio_pci_setup_barmap(struct vfio_pci_device *vdev, int bar)
return 0;
}
+void __iomem *vfio_pci_get_barmap(void *device_data, int bar)
+{
+ int ret;
+ struct vfio_pci_device *vdev = device_data;
+
+ ret = vfio_pci_setup_barmap(vdev, bar);
+ return ret ? ERR_PTR(ret) : vdev->barmap[bar];
+}
+EXPORT_SYMBOL_GPL(vfio_pci_get_barmap);
+
ssize_t vfio_pci_bar_rw(struct vfio_pci_device *vdev, char __user *buf,
size_t count, loff_t *ppos, bool iswrite)
{
diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index 6310c53f9d36..0c786fec4602 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -234,6 +234,7 @@ extern void *vfio_pci_vendor_data(void *device_data);
extern int vfio_pci_set_vendor_regions(void *device_data,
int num_vendor_regions);
extern int vfio_pci_set_vendor_irqs(void *device_data, int num_vendor_irqs);
+extern void __iomem *vfio_pci_get_barmap(void *device_data, int bar);
struct vfio_pci_vendor_driver_ops {
char *name;
--
2.17.1
next prev parent reply other threads:[~2020-05-18 3:00 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-18 2:42 [RFC PATCH v4 00/10] Introduce vendor ops in vfio-pci Yan Zhao
2020-05-18 2:43 ` [RFC PATCH v4 01/10] vfio/pci: register/unregister vfio_pci_vendor_driver_ops Yan Zhao
2020-05-18 2:45 ` [RFC PATCH v4 02/10] vfio/pci: macros to generate module_init and module_exit for vendor modules Yan Zhao
2020-06-04 15:01 ` Cornelia Huck
2020-06-05 2:05 ` Yan Zhao
2020-05-18 2:49 ` [RFC PATCH v4 03/10] vfio/pci: export vendor_data, irq_type, num_regions, pdev and functions in vfio_pci_ops Yan Zhao
2020-05-18 2:49 ` [RFC PATCH v4 04/10] vfio/pci: let vfio_pci know number of vendor regions and vendor irqs Yan Zhao
2020-06-04 15:25 ` Cornelia Huck
2020-06-05 2:15 ` Yan Zhao
2020-06-11 12:31 ` David Edmondson
2020-06-11 23:09 ` Yan Zhao
2020-05-18 2:50 ` Yan Zhao [this message]
2020-05-18 2:50 ` [RFC PATCH v4 06/10] vfio: Define device specific irq type capability Yan Zhao
2020-05-18 2:52 ` [RFC PATCH v4 07/10] vfio/pci: introduce a new irq type VFIO_IRQ_TYPE_REMAP_BAR_REGION Yan Zhao
2020-05-18 2:56 ` [QEMU RFC PATCH v4] hw/vfio/pci: remap bar region irq Yan Zhao
2020-05-29 21:45 ` [RFC PATCH v4 07/10] vfio/pci: introduce a new irq type VFIO_IRQ_TYPE_REMAP_BAR_REGION Alex Williamson
2020-06-01 6:57 ` Yan Zhao
2020-06-01 16:43 ` Alex Williamson
2020-06-02 8:28 ` Yan Zhao
2020-06-02 19:34 ` Alex Williamson
2020-06-03 1:40 ` Yan Zhao
2020-06-03 23:04 ` Alex Williamson
2020-06-04 2:42 ` Yan Zhao
2020-06-04 4:10 ` Alex Williamson
2020-06-05 0:26 ` He, Shaopeng
2020-06-05 17:54 ` Alex Williamson
2020-06-05 2:02 ` Yan Zhao
2020-06-05 16:13 ` Alex Williamson
2020-06-10 5:23 ` Yan Zhao
2020-06-19 22:55 ` Alex Williamson
2020-06-22 3:34 ` Yan Zhao
2020-05-18 2:53 ` [RFC PATCH v4 08/10] i40e/vf_migration: VF live migration - pass-through VF first Yan Zhao
2020-06-10 8:59 ` Xiang Zheng
2020-06-11 0:23 ` Yan Zhao
2020-06-11 2:27 ` Xiang Zheng
2020-06-11 23:10 ` Yan Zhao
2020-05-18 2:54 ` [RFC PATCH v4 09/10] i40e/vf_migration: register a migration vendor region Yan Zhao
2020-05-18 2:54 ` [RFC PATCH v4 10/10] i40e/vf_migration: vendor defined irq_type to support dynamic bar map Yan Zhao
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