From: John Levon <[email protected]> We set VFIODevice::num_regions at initialization time, and do not otherwise refresh it. As it is valid in theory for a VFIO device to later increase the number of supported regions, rename the field to "num_initial_regions" to better reflect its semantics.
Signed-off-by: John Levon <[email protected]> Reviewed-by: Cédric Le Goater <[email protected]> Reviewed-by: Alex Williamson <[email protected]> Link: https://lore.kernel.org/qemu-devel/[email protected] Signed-off-by: Cédric Le Goater <[email protected]> --- include/hw/vfio/vfio-device.h | 2 +- hw/vfio-user/device.c | 2 +- hw/vfio/ccw.c | 4 ++-- hw/vfio/device.c | 12 ++++++------ hw/vfio/iommufd.c | 3 ++- hw/vfio/pci.c | 4 ++-- 6 files changed, 14 insertions(+), 13 deletions(-) diff --git a/include/hw/vfio/vfio-device.h b/include/hw/vfio/vfio-device.h index 7e9aed6d3cd424d718919a0b236d8acf1bc0deaf..0fe6c60ba2d65b0ef5de5ef0c75c43cfa8e89352 100644 --- a/include/hw/vfio/vfio-device.h +++ b/include/hw/vfio/vfio-device.h @@ -74,7 +74,7 @@ typedef struct VFIODevice { VFIODeviceOps *ops; VFIODeviceIOOps *io_ops; unsigned int num_irqs; - unsigned int num_regions; + unsigned int num_initial_regions; unsigned int flags; VFIOMigration *migration; Error *migration_blocker; diff --git a/hw/vfio-user/device.c b/hw/vfio-user/device.c index 0609a7dc25428c1e7efed1e7a4e85de91aace2d4..64ef35b3209429f7158d4ea79f095a5f16950d77 100644 --- a/hw/vfio-user/device.c +++ b/hw/vfio-user/device.c @@ -134,7 +134,7 @@ static int vfio_user_device_io_get_region_info(VFIODevice *vbasedev, VFIOUserFDs fds = { 0, 1, fd}; int ret; - if (info->index > vbasedev->num_regions) { + if (info->index > vbasedev->num_initial_regions) { return -EINVAL; } diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c index 9560b8d851b6b25e647476c51efe845ebff10410..4d9588e7aa1c0868fc2530d7e297676834d85259 100644 --- a/hw/vfio/ccw.c +++ b/hw/vfio/ccw.c @@ -484,9 +484,9 @@ static bool vfio_ccw_get_region(VFIOCCWDevice *vcdev, Error **errp) * We always expect at least the I/O region to be present. We also * may have a variable number of regions governed by capabilities. */ - if (vdev->num_regions < VFIO_CCW_CONFIG_REGION_INDEX + 1) { + if (vdev->num_initial_regions < VFIO_CCW_CONFIG_REGION_INDEX + 1) { error_setg(errp, "vfio: too few regions (%u), expected at least %u", - vdev->num_regions, VFIO_CCW_CONFIG_REGION_INDEX + 1); + vdev->num_initial_regions, VFIO_CCW_CONFIG_REGION_INDEX + 1); return false; } diff --git a/hw/vfio/device.c b/hw/vfio/device.c index 64f87503894791850b059b225762fd45d85ee16c..52079f4cf5bda7c1d9e6e3791a6c340a0e3f57ba 100644 --- a/hw/vfio/device.c +++ b/hw/vfio/device.c @@ -257,7 +257,7 @@ int vfio_device_get_region_info_type(VFIODevice *vbasedev, uint32_t type, { int i; - for (i = 0; i < vbasedev->num_regions; i++) { + for (i = 0; i < vbasedev->num_initial_regions; i++) { struct vfio_info_cap_header *hdr; struct vfio_region_info_cap_type *cap_type; @@ -466,7 +466,7 @@ void vfio_device_prepare(VFIODevice *vbasedev, VFIOContainer *bcontainer, int i; vbasedev->num_irqs = info->num_irqs; - vbasedev->num_regions = info->num_regions; + vbasedev->num_initial_regions = info->num_regions; vbasedev->flags = info->flags; vbasedev->reset_works = !!(info->flags & VFIO_DEVICE_FLAGS_RESET); @@ -476,10 +476,10 @@ void vfio_device_prepare(VFIODevice *vbasedev, VFIOContainer *bcontainer, QLIST_INSERT_HEAD(&vfio_device_list, vbasedev, global_next); vbasedev->reginfo = g_new0(struct vfio_region_info *, - vbasedev->num_regions); + vbasedev->num_initial_regions); if (vbasedev->use_region_fds) { - vbasedev->region_fds = g_new0(int, vbasedev->num_regions); - for (i = 0; i < vbasedev->num_regions; i++) { + vbasedev->region_fds = g_new0(int, vbasedev->num_initial_regions); + for (i = 0; i < vbasedev->num_initial_regions; i++) { vbasedev->region_fds[i] = -1; } } @@ -489,7 +489,7 @@ void vfio_device_unprepare(VFIODevice *vbasedev) { int i; - for (i = 0; i < vbasedev->num_regions; i++) { + for (i = 0; i < vbasedev->num_initial_regions; i++) { g_free(vbasedev->reginfo[i]); if (vbasedev->region_fds != NULL && vbasedev->region_fds[i] != -1) { close(vbasedev->region_fds[i]); diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c index fc9cd9d22ff2d6f126d3c0964d7033eee33ed9f2..bb5775aa711a668b7927865d19c3a27499ef49c8 100644 --- a/hw/vfio/iommufd.c +++ b/hw/vfio/iommufd.c @@ -650,7 +650,8 @@ found_container: vfio_iommufd_cpr_register_device(vbasedev); trace_iommufd_cdev_device_info(vbasedev->name, devfd, vbasedev->num_irqs, - vbasedev->num_regions, vbasedev->flags); + vbasedev->num_initial_regions, + vbasedev->flags); return true; err_listener_register: diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 06b06afc2b43d34d3a78ab874e3735eef91f529f..8b8bc5a42186d617ccfcc2307f62e19b53f46d50 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -2975,9 +2975,9 @@ bool vfio_pci_populate_device(VFIOPCIDevice *vdev, Error **errp) return false; } - if (vbasedev->num_regions < VFIO_PCI_CONFIG_REGION_INDEX + 1) { + if (vbasedev->num_initial_regions < VFIO_PCI_CONFIG_REGION_INDEX + 1) { error_setg(errp, "unexpected number of io regions %u", - vbasedev->num_regions); + vbasedev->num_initial_regions); return false; } -- 2.51.0
