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[Qemu-devel] [PATCH v5 09/11] spapr vfio: add vfio_container_spapr_get_i
From: |
Alexey Kardashevskiy |
Subject: |
[Qemu-devel] [PATCH v5 09/11] spapr vfio: add vfio_container_spapr_get_info() |
Date: |
Wed, 12 Mar 2014 16:52:28 +1100 |
As sPAPR platform supports DMA windows on a PCI bus, the information
about their location and size should be passed into the guest via
the device tree.
The patch adds a helper to read this info from the container fd.
Signed-off-by: Alexey Kardashevskiy <address@hidden>
---
Changes:
v6:
* added dup() to protect group_fd from accidental disposal
v5:
* reworked to reflect change in vfio_get_group() from one
of previous patches change
v4:
* fixed possible leaks on error paths
---
hw/misc/vfio.c | 36 ++++++++++++++++++++++++++++++++++++
include/hw/misc/vfio.h | 11 +++++++++++
2 files changed, 47 insertions(+)
create mode 100644 include/hw/misc/vfio.h
diff --git a/hw/misc/vfio.c b/hw/misc/vfio.c
index 4f6f5da..6dee090 100644
--- a/hw/misc/vfio.c
+++ b/hw/misc/vfio.c
@@ -39,6 +39,7 @@
#include "qemu/range.h"
#include "sysemu/kvm.h"
#include "sysemu/sysemu.h"
+#include "hw/misc/vfio.h"
/* #define DEBUG_VFIO */
#ifdef DEBUG_VFIO
@@ -4163,3 +4164,38 @@ static void register_vfio_pci_dev_type(void)
}
type_init(register_vfio_pci_dev_type)
+
+int vfio_container_spapr_get_info(AddressSpace *as, uint64_t liobn,
+ int32_t groupid,
+ struct vfio_iommu_spapr_tce_info *info)
+{
+ VFIOGroup *group;
+ VFIOContainer *container;
+ int ret, fd;
+
+ group = vfio_get_group(groupid, as);
+ if (!group) {
+ return -1;
+ }
+ container = group->container;
+ if (!group->container) {
+ goto put_group_exit;
+ }
+ fd = container->fd;
+ if (!ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_IOMMU)) {
+ goto put_group_exit;
+ }
+ ret = ioctl(fd, VFIO_IOMMU_SPAPR_TCE_GET_INFO, info);
+ if (ret) {
+ error_report("vfio: failed to get iommu info for container: %s",
+ strerror(errno));
+ goto put_group_exit;
+ }
+
+ return 0;
+
+put_group_exit:
+ vfio_put_group(group);
+
+ return -1;
+}
diff --git a/include/hw/misc/vfio.h b/include/hw/misc/vfio.h
new file mode 100644
index 0000000..ec59989
--- /dev/null
+++ b/include/hw/misc/vfio.h
@@ -0,0 +1,11 @@
+#ifndef VFIO_API_H
+#define VFIO_API_H
+
+#include "qemu/typedefs.h"
+#include <linux/vfio.h>
+
+extern int vfio_container_spapr_get_info(AddressSpace *as, uint64_t liobn,
+ int32_t groupid,
+ struct vfio_iommu_spapr_tce_info
*info);
+
+#endif
--
1.8.4.rc4
- Re: [Qemu-devel] [PATCH v5 01/11] memory: Sanity check that no listeners remain on a destroyed AddressSpace, (continued)
[Qemu-devel] [PATCH v5 05/11] vfio: Introduce VFIO address spaces, Alexey Kardashevskiy, 2014/03/12
[Qemu-devel] [PATCH v5 03/11] vfio: Fix 128 bit handling, Alexey Kardashevskiy, 2014/03/12
[Qemu-devel] [PATCH v5 04/11] vfio: rework to have error paths, Alexey Kardashevskiy, 2014/03/12
[Qemu-devel] [PATCH v5 09/11] spapr vfio: add vfio_container_spapr_get_info(),
Alexey Kardashevskiy <=
[Qemu-devel] [PATCH v5 07/11] vfio: Add guest side IOMMU support, Alexey Kardashevskiy, 2014/03/12
Re: [Qemu-devel] [PATCH v5 07/11] vfio: Add guest side IOMMU support, Alexey Kardashevskiy, 2014/03/21
Re: [Qemu-devel] [PATCH v5 07/11] vfio: Add guest side IOMMU support, Alex Williamson, 2014/03/21
Re: [Qemu-devel] [PATCH v5 07/11] vfio: Add guest side IOMMU support, Paolo Bonzini, 2014/03/21
Re: [Qemu-devel] [PATCH v5 07/11] vfio: Add guest side IOMMU support, Alexey Kardashevskiy, 2014/03/28
Re: [Qemu-devel] [PATCH v5 07/11] vfio: Add guest side IOMMU support, Alex Williamson, 2014/03/31