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linux/arch/riscv
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Björn Töpel 7112cd26e6 riscv, bpf: Track both a0 (RISC-V ABI) and a5 (BPF) return values 
The RISC-V BPF uses a5 for BPF return values, which are zero-extended,
whereas the RISC-V ABI uses a0 which is sign-extended. In other words,
a5 and a0 can differ, and are used in different context.

The BPF trampoline are used for both BPF programs, and regular kernel
functions.

Make sure that the RISC-V BPF trampoline saves, and restores both a0
and a5.

Fixes: 49b5e77ae3 ("riscv, bpf: Add bpf trampoline support for RV64")
Signed-off-by: Björn Töpel <bjorn@rivosinc.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20231004120706.52848-3-bjorn@kernel.org
2023-10-09 15:21:25 +02:00
..
boot riscv: dts: starfive: visionfive 2: Fix uart0 pins sort order 2023-09-13 14:24:56 +01:00
configs Kbuild updates for v6.6 2023-09-05 11:01:47 -07:00
errata Merge patch series "Add non-coherent DMA support for AX45MP" 2023-09-08 11:24:34 -07:00
include mm: hugetlb: add huge page size param to set_huge_pte_at() 2023-09-29 17:20:47 -07:00
kernel riscv: kexec: Align the kexeced kernel entry 2023-09-12 13:58:39 -07:00
kvm RISC-V: KVM: Fix riscv_vcpu_get_isa_ext_single() for missing extensions 2023-09-21 15:04:01 +05:30
lib riscv: uaccess: Return the number of bytes effectively not copied 2023-08-16 07:30:06 -07:00
mm mm: hugetlb: add huge page size param to set_huge_pte_at() 2023-09-29 17:20:47 -07:00
net riscv, bpf: Track both a0 (RISC-V ABI) and a5 (BPF) return values 2023-10-09 15:21:25 +02:00
purgatory riscv/purgatory: Disable CFI 2023-08-23 14:16:40 -07:00
tools
Kbuild kexec: rename ARCH_HAS_KEXEC_PURGATORY 2023-08-18 10:18:54 -07:00
Kconfig riscv: Kconfig: Select DMA_DIRECT_REMAP only if MMU is enabled 2023-09-08 11:25:26 -07:00
Kconfig.debug
Kconfig.errata riscv: Kconfig.errata: Add dependency for RISCV_SBI in ERRATA_ANDES config 2023-09-08 11:25:28 -07:00
Kconfig.socs RISC-V: make ARCH_THEAD preclude XIP_KERNEL 2023-07-05 22:21:23 +02:00
Makefile riscv: Require FRAME_POINTER for some configurations 2023-08-23 09:07:26 -07:00
Makefile.postlink