Sign Up
Log In
Log In
or
Sign Up
Places
All Projects
Status Monitor
Collapse sidebar
openSUSE:Step:15-SP2
qemu
vfio-Find-DMA-available-capability.patch
Overview
Repositories
Revisions
Requests
Users
Attributes
Meta
File vfio-Find-DMA-available-capability.patch of Package qemu
From: Matthew Rosato <mjrosato@linux.ibm.com> Date: Mon, 26 Oct 2020 11:34:33 -0400 Subject: vfio: Find DMA available capability Git-commit: 7486a62845b1e12011dd99973e4739f69d57cd38 References: bsc#1179719 The underlying host may be limiting the number of outstanding DMA requests for type 1 IOMMU. Add helper functions to check for the DMA available capability and retrieve the current number of DMA mappings allowed. Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> [aw: vfio_get_info_dma_avail moved inside CONFIG_LINUX] Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Liang Yan <lyan@suse.com> --- hw/vfio/common.c | 31 +++++++++++++++++++++++++++++++ include/hw/vfio/vfio-common.h | 2 ++ 2 files changed, 33 insertions(+) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 77d62d2dcdf67516c3e5b42e7def..23efdfadebd0db3c8b7bf03e9b07 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -850,6 +850,37 @@ vfio_get_region_info_cap(struct vfio_region_info *info, uint16_t id) return vfio_get_cap((void *)info, info->cap_offset, id); } +static struct vfio_info_cap_header * +vfio_get_iommu_type1_info_cap(struct vfio_iommu_type1_info *info, uint16_t id) +{ + if (!(info->flags & VFIO_IOMMU_INFO_CAPS)) { + return NULL; + } + + return vfio_get_cap((void *)info, info->cap_offset, id); +} + +bool vfio_get_info_dma_avail(struct vfio_iommu_type1_info *info, + unsigned int *avail) +{ + struct vfio_info_cap_header *hdr; + struct vfio_iommu_type1_info_dma_avail *cap; + + /* If the capability cannot be found, assume no DMA limiting */ + hdr = vfio_get_iommu_type1_info_cap(info, + VFIO_IOMMU_TYPE1_INFO_DMA_AVAIL); + if (hdr == NULL) { + return false; + } + + if (avail != NULL) { + cap = (void *) hdr; + *avail = cap->avail; + } + + return true; +} + static int vfio_setup_region_sparse_mmaps(VFIORegion *region, struct vfio_region_info *info) { diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index fd564209ac710afb15325a452b8f..aa6cbe4a99890a229aa7a1e0c39c 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -191,6 +191,8 @@ int vfio_get_dev_region_info(VFIODevice *vbasedev, uint32_t type, bool vfio_has_region_cap(VFIODevice *vbasedev, int region, uint16_t cap_type); struct vfio_info_cap_header * vfio_get_region_info_cap(struct vfio_region_info *info, uint16_t id); +bool vfio_get_info_dma_avail(struct vfio_iommu_type1_info *info, + unsigned int *avail); #endif extern const MemoryListener vfio_prereg_listener;
Locations
Projects
Search
Status Monitor
Help
OpenBuildService.org
Documentation
API Documentation
Code of Conduct
Contact
Support
@OBShq
Terms
openSUSE Build Service is sponsored by
The Open Build Service is an
openSUSE project
.
Sign Up
Log In
Places
Places
All Projects
Status Monitor