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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


  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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