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, 46 insertions, 0 deletions

diff --git a/drivers/remoteproc/pru_rproc.h b/drivers/remoteproc/pru_rproc.h
new file mode 100644
index 000000000..8ee9c3171
--- /dev/null
+++ b/drivers/remoteproc/pru_rproc.h
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
+/*
+ * PRUSS Remote Processor specific types
+ *
+ * Copyright (C) 2014-2020 Texas Instruments Incorporated - https://www.ti.com/
+ *	Suman Anna <s-anna@ti.com>
+ */
+
+#ifndef _PRU_RPROC_H_
+#define _PRU_RPROC_H_
+
+/**
+ * struct pruss_int_map - PRU system events _to_ channel and host mapping
+ * @event: number of the system event
+ * @chnl: channel number assigned to a given @event
+ * @host: host number assigned to a given @chnl
+ *
+ * PRU system events are mapped to channels, and these channels are mapped
+ * to host interrupts. Events can be mapped to channels in a one-to-one or
+ * many-to-one ratio (multiple events per channel), and channels can be
+ * mapped to host interrupts in a one-to-one or many-to-one ratio (multiple
+ * channels per interrupt).
+ */
+struct pruss_int_map {
+	u8 event;
+	u8 chnl;
+	u8 host;
+};
+
+/**
+ * struct pru_irq_rsc - PRU firmware section header for IRQ data
+ * @type: resource type
+ * @num_evts: number of described events
+ * @pru_intc_map: PRU interrupt routing description
+ *
+ * The PRU firmware blob can contain optional .pru_irq_map ELF section, which
+ * provides the PRUSS interrupt mapping description. The pru_irq_rsc struct
+ * describes resource entry format.
+ */
+struct pru_irq_rsc {
+	u8 type;
+	u8 num_evts;
+	struct pruss_int_map pru_intc_map[];
+} __packed;
+
+#endif	/* _PRU_RPROC_H_ */