selftests/bpf: Add a test for objects stuck in free_by_rcu_ttracegrafted

Delete all elements of BPF_F_NO_PREALLOC hash map in one batch. The first
free_bulk() starts RCU tasks trace GP and the rest of the elements are
freed while it's in flight. Wait for call_rcu_ttrace_in_progress to clear
in bpf_mem_cache of every cpu and check that free_by_rcu_ttrace and
waiting_for_gp_ttrace lists are empty.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20260930095920.601738-4-alexei.starovoitov@gmail.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>

1 files changed, 77 insertions, 0 deletions

diff --git a/drivers/vfio/pci/Kconfig b/drivers/vfio/pci/Kconfig
new file mode 100644
index 000000000..296bf01e1
--- /dev/null
+++ b/drivers/vfio/pci/Kconfig
@@ -0,0 +1,77 @@
+# SPDX-License-Identifier: GPL-2.0-only
+menu "VFIO support for PCI devices"
+	depends on PCI
+
+config VFIO_PCI_CORE
+	tristate
+	select VFIO_VIRQFD
+	select IRQ_BYPASS_MANAGER
+
+config VFIO_PCI_INTX
+	def_bool y if !S390
+	depends on VFIO_PCI_CORE
+
+config VFIO_PCI
+	tristate "Generic VFIO support for any PCI device"
+	select VFIO_PCI_CORE
+	help
+	  Support for the generic PCI VFIO bus driver which can connect any
+	  PCI device to the VFIO framework.
+
+	  If you don't know what to do here, say N.
+
+if VFIO_PCI
+config VFIO_PCI_VGA
+	bool "Generic VFIO PCI support for VGA devices"
+	depends on X86 && VGA_ARB
+	help
+	  Support for VGA extension to VFIO PCI.  This exposes an additional
+	  region on VGA devices for accessing legacy VGA addresses used by
+	  BIOS and generic video drivers.
+
+	  If you don't know what to do here, say N.
+
+config VFIO_PCI_IGD
+	bool "Generic VFIO PCI extensions for Intel graphics (GVT-d)"
+	depends on X86
+	default y
+	help
+	  Support for Intel IGD specific extensions to enable direct
+	  assignment to virtual machines.  This includes exposing an IGD
+	  specific firmware table and read-only copies of the host bridge
+	  and LPC bridge config space.
+
+	  To enable Intel IGD assignment through vfio-pci, say Y.
+endif
+
+config VFIO_PCI_ZDEV_KVM
+	bool "VFIO PCI extensions for s390x KVM passthrough"
+	depends on S390 && KVM
+	default y
+	help
+	  Support s390x-specific extensions to enable support for enhancements
+	  to KVM passthrough capabilities, such as interpretive execution of
+	  zPCI instructions.
+
+	  To enable s390x KVM vfio-pci extensions, say Y.
+
+config VFIO_PCI_DMABUF
+	def_bool y if VFIO_PCI_CORE && PCI_P2PDMA && DMA_SHARED_BUFFER
+
+source "drivers/vfio/pci/mlx5/Kconfig"
+
+source "drivers/vfio/pci/ism/Kconfig"
+
+source "drivers/vfio/pci/hisilicon/Kconfig"
+
+source "drivers/vfio/pci/pds/Kconfig"
+
+source "drivers/vfio/pci/virtio/Kconfig"
+
+source "drivers/vfio/pci/nvgrace-gpu/Kconfig"
+
+source "drivers/vfio/pci/qat/Kconfig"
+
+source "drivers/vfio/pci/xe/Kconfig"
+
+endmenu