kernel-test: denylist and adjustments for GCC BPF

.github/workflows/kernel-test.yml

@@ -60,23 +60,15 @@ jobs:
         # zstd is installed by default in the runner images.
         run: zstd -d -T0  vmlinux-${{ inputs.arch }}-${{ inputs.toolchain_full }}.tar.zst --stdout | tar -xf -
 
-      - name: Prepare ALLOW/DENYLIST
+      - name: Prepare to run selftests
         env:
+          ARCH: ${{ inputs.arch }}
+          DEPLOYMENT: ${{ env.DEPLOYMENT }}
+          KERNEL_TEST: ${{ inputs.test }}
           SELFTESTS_BPF: ${{ github.workspace }}/selftests/bpf
           VMTEST_CONFIGS: ${{ github.workspace }}/ci/vmtest/configs
-        run: |
-          cat "${SELFTESTS_BPF}/ALLOWLIST"          \
-              "${SELFTESTS_BPF}/ALLOWLIST.${ARCH}"  \
-              "${VMTEST_CONFIGS}/ALLOWLIST"         \
-              "${VMTEST_CONFIGS}/ALLOWLIST.${ARCH}" \
-            2> /dev/null > "${ALLOWLIST_FILE}" || true
-
-          cat "${SELFTESTS_BPF}/DENYLIST" \
-              "${SELFTESTS_BPF}/DENYLIST.${ARCH}" \
-              "${VMTEST_CONFIGS}/DENYLIST" \
-              "${VMTEST_CONFIGS}/DENYLIST.${ARCH}" \
-              "${VMTEST_CONFIGS}/DENYLIST.${DEPLOYMENT}" \
-            2> /dev/null > "${DENYLIST_FILE}" || true
+        shell: bash
+        run: ${{ github.workspace }}/ci/vmtest/prepare-selftests-run.sh
 
       - name: Run selftests
         uses: ./run-vmtest

build-bpf-gcc/build-and-install.sh

@@ -24,7 +24,7 @@ if [ ! -f  "${INSTALLDIR}/${BINUTILS_BASENAME}.built" ]; then
   cd ${BINUTILS_BASENAME};
    mkdir build-bpf;
    cd build-bpf && ../configure --target=bpf-unknown-none --prefix=$INSTALLDIR && make -j $(nproc) && make install && touch ${INSTALLDIR}/${BINUTILS_BASENAME}.built;
-   ) >> $LOGFILE 2>&1 || { echo -e "\nerror: building $BINUTILS_TARBALL"; exit 1; }
+   ) 2>&1 | tee -a $LOGFILE || { echo -e "\nerror: building $BINUTILS_TARBALL"; exit 1; }
   echo done
 fi
 
@@ -35,7 +35,7 @@ if [ ! -f  "${INSTALLDIR}/${GCC_BASENAME}.built" ]; then
    ./contrib/download_prerequisites
    mkdir build-bpf;
    cd build-bpf && ../configure --target=bpf-unknown-none --prefix=$INSTALLDIR && make -j $(nproc) && make install && touch ${INSTALLDIR}/${GCC_BASENAME}.built;
-   ) >> $LOGFILE 2>&1 || { echo -e "\nerror: building $GCC_TARBALL"; exit 1; }
+   ) 2>&1 | tee -a $LOGFILE || { echo -e "\nerror: building $GCC_TARBALL"; exit 1; }
   echo done
 fi
 

ci/diffs/0599-selftests-bpf-GCC-BPF-build.patch

@@ -0,0 +1,40 @@
+From 1cbbffc89dc42c353031067a49cdc3b912b07321 Mon Sep 17 00:00:00 2001
+From: Ihor Solodrai <[email protected]>
+Date: Tue, 31 Dec 2024 16:24:43 -0800
+Subject: [PATCH] selftests/bpf: GCC BPF build
+
+---
+ tools/testing/selftests/bpf/Makefile | 10 +++++++++-
+ 1 file changed, 9 insertions(+), 1 deletion(-)
+
+diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
+index 75016962f795..c4f4003a8c2e 100644
+--- a/tools/testing/selftests/bpf/Makefile
++++ b/tools/testing/selftests/bpf/Makefile
+@@ -102,6 +102,14 @@ progs/btf_dump_test_case_packing.c-bpf_gcc-CFLAGS := -Wno-error
+ progs/btf_dump_test_case_padding.c-bpf_gcc-CFLAGS := -Wno-error
+ progs/btf_dump_test_case_syntax.c-bpf_gcc-CFLAGS := -Wno-error
+
++
++progs/test_cls_redirect.c-CFLAGS := -nostdinc
++progs/test_cls_redirect_dynptr.c-CFLAGS := -nostdinc
++progs/test_cls_redirect_subprogs.c-CFLAGS := -nostdinc
++
++progs/verifier_bpf_fastcall.c-CFLAGS := -Wno-error
++progs/verifier_search_pruning.c-CFLAGS := -Wno-error
++
+ # The following tests do type-punning, via the __imm_insn macro, from
+ # `struct bpf_insn' to long and then uses the value.  This triggers an
+ # "is used uninitialized" warning in GCC due to strict-aliasing
+@@ -502,7 +510,7 @@ endef
+ # Build BPF object using GCC
+ define GCC_BPF_BUILD_RULE
+ 	$(call msg,GCC-BPF,$4,$2)
+-	$(Q)$(BPF_GCC) $3 -DBPF_NO_PRESERVE_ACCESS_INDEX -Wno-attributes -O2 -c $1 -o $2
++	$(Q)$(BPF_GCC) $3 -DBPF_NO_PRESERVE_ACCESS_INDEX -Wno-attributes -O2 -std=gnu17 -c $1 -o $2
+ endef
+
+ SKEL_BLACKLIST := btf__% test_pinning_invalid.c test_sk_assign.c
+-- 
+2.47.1
+