Merge branch 'riscv-bpf-prepare-for-upcoming-daily-ci'

Pu Lehui says:

====================
riscv, bpf: Prepare for upcoming daily CI

From: Pu Lehui <pulehui@huawei.com>

For some time, bpf selftests on riscv64 have suffered from several
silent breakages and test failures. These mainly stemmed from changes
such as riscv ftrace atomic patching [0], qemu pmu behavior changes, and
environment mismatches. While some issues have already been addressed in
previous patches [1-3] and some are in progress [4], the remaining ones
are handled in this series.

To catch regressions promptly and close this long-standing riscv bpf CI
gap, the riscv-bpf-daily project [5] is introduced here. With the
assistance of LLMs, putting together this automated workflow was fairly
straightforward. The pipeline pulls the latest bpf-next branch daily,
executes both test_progs and test_verifier, and automatically creates
github issues with brief failure descriptions and sends notifications
when failures occur. It has been running smoothly for over a week and
has already proven its value by catching some real jit bugs.

To pave the way for riscv-bpf-daily, this patchset addresses the
remaining fixes, test adaptations, and environment dependencies.

[0] https://lore.kernel.org/all/20250407180838.42877-5-andybnac@gmail.com/
[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2820d227ad4e
[2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f2aaa6215910
[3] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c7e617552938
[4] https://lore.kernel.org/bpf/20260722140015.1982158-1-varunrmallya@gmail.com
[5] https://github.com/pulehui/riscv-bpf-daily

v3:
- Update comment in vmtest.sh about qemu.

v2: https://lore.kernel.org/bpf/20260930064607.1908864-1-pulehui@huaweicloud.com
- Change test value in setget_sockopt to avoid quantization error.
- Drop path modify in d_path testcase as will mount /dev/shm in rootfs.

v1: https://lore.kernel.org/bpf/20260929083924.1851840-1-pulehui@huaweicloud.com
====================

Link: https://patch.msgid.link/20260930083522.1914145-1-pulehui@huaweicloud.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

arch/riscv/net/bpf_jit_comp64.c

@@ -913,7 +913,8 @@ int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type old_t,
 	return ret;
 }
 
-static void store_args(int nr_arg_slots, int args_off, struct rv_jit_context *ctx)
+static void store_args(int nr_arg_slots, int args_off, int stack_args_off,
+		       struct rv_jit_context *ctx)
 {
 	int i;
 
@@ -921,8 +922,8 @@ static void store_args(int nr_arg_slots, int args_off, struct rv_jit_context *ct
 		if (i < RV_MAX_REG_ARGS) {
 			emit_sd(RV_REG_FP, -args_off, RV_REG_A0 + i, ctx);
 		} else {
-			/* skip slots for T0 and FP of traced function */
-			emit_ld(RV_REG_T1, 16 + (i - RV_MAX_REG_ARGS) * 8, RV_REG_FP, ctx);
+			emit_ld(RV_REG_T1, stack_args_off +
+				(i - RV_MAX_REG_ARGS) * 8, RV_REG_FP, ctx);
 			emit_sd(RV_REG_FP, -args_off, RV_REG_T1, ctx);
 		}
 		args_off -= 8;
@@ -1217,7 +1218,12 @@ static int __arch_prepare_bpf_trampoline(struct bpf_tramp_image *im,
 	func_meta = nr_arg_slots;
 	emit_store_stack_imm64(RV_REG_T1, -func_meta_off, func_meta, ctx);
 
-	store_args(nr_arg_slots, args_off, ctx);
+	/*
+	 * A direct struct_ops call has its first stack argument at the incoming
+	 * SP, which the trampoline keeps as FP. The fentry path pushes the
+	 * parent frame first, so its incoming stack arguments start at FP + 16.
+	 */
+	store_args(nr_arg_slots, args_off, is_struct_ops ? 0 : 16, ctx);
 
 	if (bpf_fsession_cnt(tnodes)) {
 		/* clear all session cookies' value */

tools/testing/selftests/bpf/DENYLIST.riscv64

@@ -1,2 +1,3 @@
 # riscv64 deny list for BPF CI and local vmtest
 exceptions					# JIT does not support exceptions
+probe_user					# kprobe hit in trap

tools/testing/selftests/bpf/progs/setget_sockopt.c

@@ -61,8 +61,8 @@ static const struct sockopt_test sol_tcp_tests[] = {
 	{ .opt = TCP_NOTSENT_LOWAT, .new = 1314, .expected = 1314, },
 	{ .opt = TCP_BPF_SOCK_OPS_CB_FLAGS, .new = BPF_SOCK_OPS_ALL_CB_FLAGS,
 	  .expected = BPF_SOCK_OPS_ALL_CB_FLAGS, },
-	{ .opt = TCP_BPF_DELACK_MAX, .new = 30000, .expected = 30000, },
-	{ .opt = TCP_BPF_RTO_MIN, .new = 30000, .expected = 30000, },
+	{ .opt = TCP_BPF_DELACK_MAX, .new = 40000, .expected = 40000, },
+	{ .opt = TCP_BPF_RTO_MIN, .new = 40000, .expected = 40000, },
 	{ .opt = TCP_RTO_MAX_MS, .new = 2000, .expected = 2000, },
 	{ .opt = 0, },
 };

tools/testing/selftests/bpf/vmtest.sh

@@ -35,11 +35,11 @@ aarch64)
 	ARCH="arm64"
 	;;
 riscv64)
-	# required qemu version v7.2.0+
+	# required qemu version v8.2.0+
 	QEMU_BINARY=qemu-system-riscv64
 	QEMU_CONSOLE="ttyS0,115200"
 	HOST_FLAGS=(-M virt -cpu host -enable-kvm -smp 8)
-	CROSS_FLAGS=(-M virt -cpu rv64,sscofpmf=true -smp 8)
+	CROSS_FLAGS=(-M virt -cpu max,sscofpmf=false -smp 8)
 	BZIMAGE="arch/riscv/boot/Image"
 	ARCH="riscv"
 	;;
@@ -65,7 +65,7 @@ OUTPUT_DIR="$HOME/.bpf_selftests"
 KCONFIG_REL_PATHS=("tools/testing/selftests/bpf/config"
 	"tools/testing/selftests/bpf/config.vm"
 	"tools/testing/selftests/bpf/config.${PLATFORM}")
-INDEX_URL="https://raw.githubusercontent.com/libbpf/ci/master/INDEX"
+INDEX_URL="https://raw.githubusercontent.com/libbpf/ci/main/INDEX"
 NUM_COMPILE_JOBS="$(nproc)"
 LOG_FILE_BASE="$(date +"bpf_selftests.%Y-%m-%d_%H-%M-%S")"
 LOG_FILE="${LOG_FILE_BASE}.log"