ci: Enable CI on aarch64

.github/workflows/test.yml

@@ -36,8 +36,9 @@ jobs:
             """
             CPU architecture supported by CI.
             """
-            x86_64 = "x86_64"
+            aarch64 = "aarch64"
             s390x = "s390x"
+            x86_64 = "x86_64"
 
           def set_output(name, value):
             """Write an output variable to the GitHub output file."""
@@ -66,6 +67,8 @@ jobs:
           matrix = [
             {"kernel": "LATEST", "runs_on": [], "arch": Arch.x86_64.value, "toolchain": "gcc"},
             {"kernel": "LATEST", "runs_on": [], "arch": Arch.x86_64.value, "toolchain": "${{ needs.llvm-toolchain.outputs.llvm }}"},
+            {"kernel": "LATEST", "runs_on": [], "arch": Arch.aarch64.value, "toolchain": "gcc"},
+            {"kernel": "LATEST", "runs_on": [], "arch": Arch.aarch64.value, "toolchain": "${{ needs.llvm-toolchain.outputs.llvm }}"},
             {"kernel": "LATEST", "runs_on": [], "arch": Arch.s390x.value, "toolchain": "gcc"},
           ]
           self_hosted_repos = [
@@ -168,7 +171,7 @@ jobs:
           # zstd is installed by default in the runner images.
           tar -cf - \
             "${KBUILD_OUTPUT}"/.config \
-            "${KBUILD_OUTPUT}"/arch/*/boot/bzImage \
+            "${KBUILD_OUTPUT}"/$(KBUILD_OUTPUT="${KBUILD_OUTPUT}" make -s image_name) \
             "${KBUILD_OUTPUT}"/include/config/auto.conf \
             "${KBUILD_OUTPUT}"/include/generated/autoconf.h \
             "${KBUILD_OUTPUT}"/vmlinux \

ci/diffs/0001-x86-vdso-Conditionally-export-__vdso_sgx_enter_enclave.patch

@@ -0,0 +1,44 @@
+Recently, ld.lld moved from '--undefined-version' to
+'--no-undefined-version' as the default, which breaks building the vDSO
+when CONFIG_X86_SGX is not set:
+
+  ld.lld: error: version script assignment of 'LINUX_2.6' to symbol '__vdso_sgx_enter_enclave' failed: symbol not defined
+
+__vdso_sgx_enter_enclave is only included in the vDSO when
+CONFIG_X86_SGX is set. Only export it if it will be present in the final
+object, which clears up the error.
+
+Link: https://github.com/ClangBuiltLinux/linux/issues/1756
+Signed-off-by: Nathan Chancellor <[email protected]>
+---
+
+It would be nice if this could be picked up for an -rc release but I
+won't argue otherwise.
+
+Alternatively, we could add '--undefined-version' to the vDSO ldflags
+but this does not seem unreasonable to me.
+
+ arch/x86/entry/vdso/vdso.lds.S | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/arch/x86/entry/vdso/vdso.lds.S b/arch/x86/entry/vdso/vdso.lds.S
+index 4bf48462fca7..e8c60ae7a7c8 100644
+--- a/arch/x86/entry/vdso/vdso.lds.S
++++ b/arch/x86/entry/vdso/vdso.lds.S
+@@ -27,7 +27,9 @@ VERSION {
+ 		__vdso_time;
+ 		clock_getres;
+ 		__vdso_clock_getres;
++#ifdef CONFIG_X86_SGX
+ 		__vdso_sgx_enter_enclave;
++#endif
+ 	local: *;
+ 	};
+ }
+
+base-commit: f0c4d9fc9cc9462659728d168387191387e903cc
+
+-- 
+2.38.1
+
+

ci/vmtest/configs/DENYLIST.aarch64

@@ -0,0 +1,3 @@
+cgrp_local_storage                  # libbpf: prog 'update_cookie_tracing': failed to attach: ERROR: strerror_r(-524)=22
+usdt/multispec                      # usdt_300_bad_attach unexpected pointer: 0x558c63d8f0
+core_reloc_btfgen                   # run_core_reloc_tests:FAIL:run_btfgen unexpected error: 32512 (errno 22)