On Fri, Aug 22, 2025 at 03:58:48PM +0200, Ben Hutchings wrote: > The UAPI <asm/bpf_perf_event.h> header is required to define the type > alias bpf_user_pt_regs_t. The generic version includes > <linux/ptrace.h> and defines it as an alias for struct pt_regs. > > For these 3 architectures, struct pt_regs is not defined in the UAPI. > They need to override the generic version with an architecture- > specific definition of bpf_user_pt_regs_t. > > References: https://autobuild.buildroot.org/results/bf2/bf21079facd21d684e8656e7ac44b4218a8fcb9d/build-end.log > Fixes: c895f6f703ad ("bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type") > Signed-off-by: Ben Hutchings <ben.hutchings@xxxxxxx> > --- > I understand that perf_events is not yet supported on nios2 and > openrisc, so this isn't obviously useful. However, libbpf has generic > handling for BPF_PROG_TYPE_PERF_EVENT that includes > <linux/bpf_perf_event.h> and it now fails to build on openrisc. Understood. > I verified that: > - This fixes building libbpf with Buildroot for openrisc > - This makes "#include <linux/bpf_perf_event.h>" work on xtensa > > I wasn't able to test nios2 at all. > > Ben. > > arch/nios2/include/uapi/asm/bpf_perf_event.h | 9 +++++++++ > arch/openrisc/include/uapi/asm/bpf_perf_event.h | 9 +++++++++ > arch/xtensa/include/uapi/asm/bpf_perf_event.h | 9 +++++++++ > 3 files changed, 27 insertions(+) > create mode 100644 arch/nios2/include/uapi/asm/bpf_perf_event.h > create mode 100644 arch/openrisc/include/uapi/asm/bpf_perf_event.h > create mode 100644 arch/xtensa/include/uapi/asm/bpf_perf_event.h > > diff --git a/arch/nios2/include/uapi/asm/bpf_perf_event.h b/arch/nios2/include/uapi/asm/bpf_perf_event.h > new file mode 100644 > index 000000000000..5e1e648aeec4 > --- /dev/null > +++ b/arch/nios2/include/uapi/asm/bpf_perf_event.h > @@ -0,0 +1,9 @@ > +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ > +#ifndef _UAPI__ASM_BPF_PERF_EVENT_H__ > +#define _UAPI__ASM_BPF_PERF_EVENT_H__ > + > +#include <asm/ptrace.h> > + > +typedef struct user_pt_regs bpf_user_pt_regs_t; > + > +#endif /* _UAPI__ASM_BPF_PERF_EVENT_H__ */ > diff --git a/arch/openrisc/include/uapi/asm/bpf_perf_event.h b/arch/openrisc/include/uapi/asm/bpf_perf_event.h > new file mode 100644 > index 000000000000..6cb1c2823288 > --- /dev/null > +++ b/arch/openrisc/include/uapi/asm/bpf_perf_event.h > @@ -0,0 +1,9 @@ > +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ > +#ifndef _UAPI__ASM_BPF_PERF_EVENT_H__ > +#define _UAPI__ASM_BPF_PERF_EVENT_H__ > + > +#include <asm/ptrace.h> > + > +typedef struct user_regs_struct bpf_user_pt_regs_t; > + > +#endif /* _UAPI__ASM_BPF_PERF_EVENT_H__ */ This bit, Acked-by: Stafford Horne <shorne@xxxxxxxxx> Who do you plan on having take this patch for upstream? Will you? -Stafford > diff --git a/arch/xtensa/include/uapi/asm/bpf_perf_event.h b/arch/xtensa/include/uapi/asm/bpf_perf_event.h > new file mode 100644 > index 000000000000..5e1e648aeec4 > --- /dev/null > +++ b/arch/xtensa/include/uapi/asm/bpf_perf_event.h > @@ -0,0 +1,9 @@ > +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ > +#ifndef _UAPI__ASM_BPF_PERF_EVENT_H__ > +#define _UAPI__ASM_BPF_PERF_EVENT_H__ > + > +#include <asm/ptrace.h> > + > +typedef struct user_pt_regs bpf_user_pt_regs_t; > + > +#endif /* _UAPI__ASM_BPF_PERF_EVENT_H__ */ > -- > 2.39.5 > >
