[PW_SID:1145857] [bpf-next] riscv, bpf: Fix missing sign-ext for signed 1-byte and 2-byte kfunc args - #2467
[PW_SID:1145857] [bpf-next] riscv, bpf: Fix missing sign-ext for signed 1-byte and 2-byte kfunc args#2467linux-riscv-bot wants to merge 2 commits into
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On RV64, the ABI requires sign-extension for signed 1-byte and 2-byte kfunc args. However, the RV64 JIT currently does not perform sign-extension for such kfunc args. Before commit 7ce090a ("bpf: Infer zext_dst based on static register liveness analysis"), state pruning could potentially omit zero-extension of 32-bit subregisters, which inadvertently masked the above issue by making the args appear as if they had been properly sign-extended. After that commit, the problem is exposed, causing the kfunc_call/kfunc_call_test4 selftest to fail. Fix this by extending the existing sign-extension logic to handle signed 1-byte and 2-byte kfunc args as well. Fixes: 443574b ("riscv, bpf: Fix kfunc parameters incompatibility between bpf and riscv abi") Signed-off-by: Pu Lehui <pulehui@huawei.com> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>
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Patch 1: "[bpf-next] riscv, bpf: Fix missing sign-ext for signed 1-byte and 2-byte kfunc args" |
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Patch 1: "[bpf-next] riscv, bpf: Fix missing sign-ext for signed 1-byte and 2-byte kfunc args" |
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Patch 1: "[bpf-next] riscv, bpf: Fix missing sign-ext for signed 1-byte and 2-byte kfunc args" |
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Patch 1: "[bpf-next] riscv, bpf: Fix missing sign-ext for signed 1-byte and 2-byte kfunc args" |
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Patch 1: "[bpf-next] riscv, bpf: Fix missing sign-ext for signed 1-byte and 2-byte kfunc args" |
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Patch 1: "[bpf-next] riscv, bpf: Fix missing sign-ext for signed 1-byte and 2-byte kfunc args" |
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Patch 1: "[bpf-next] riscv, bpf: Fix missing sign-ext for signed 1-byte and 2-byte kfunc args" |
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Patch 1: "[bpf-next] riscv, bpf: Fix missing sign-ext for signed 1-byte and 2-byte kfunc args" |
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Patch 1: "[bpf-next] riscv, bpf: Fix missing sign-ext for signed 1-byte and 2-byte kfunc args" |
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Patch 1: "[bpf-next] riscv, bpf: Fix missing sign-ext for signed 1-byte and 2-byte kfunc args" |
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Patch 1: "[bpf-next] riscv, bpf: Fix missing sign-ext for signed 1-byte and 2-byte kfunc args" |
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Patch 1: "[bpf-next] riscv, bpf: Fix missing sign-ext for signed 1-byte and 2-byte kfunc args" |
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PR for series 1145857 applied to workflow__riscv__fixes
Name: [bpf-next] riscv, bpf: Fix missing sign-ext for signed 1-byte and 2-byte kfunc args
URL: https://patchwork.kernel.org/project/linux-riscv/list/?series=1145857
Version: 1