powerpc/bpf: Fix broken uapi for BPF_PROG_TYPE_PERF_EVENT

sandip4n · mpe · commit a6460b03f945 · 2018-12-07T23:19:04.000+11:00
Now that there are different variants of pt_regs for userspace and kernel, the uapi for the BPF_PROG_TYPE_PERF_EVENT program type must be changed by exporting the user_pt_regs structure instead of the pt_regs structure that is in-kernel only. Fixes: 002af93 ("powerpc: Split user/kernel definitions of struct pt_regs") Signed-off-by: Sandipan Das <sandipan@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/include/asm/perf_event.h b/arch/powerpc/include/asm/perf_event.h
@@ -26,6 +26,8 @@
 #include <asm/ptrace.h>
 #include <asm/reg.h>
 
+#define perf_arch_bpf_user_pt_regs(regs) &regs->user_regs
+
 /*
  * Overload regs->result to specify whether we should use the MSR (result
  * is zero) or the SIAR (result is non zero).
diff --git a/arch/powerpc/include/uapi/asm/Kbuild b/arch/powerpc/include/uapi/asm/Kbuild
@@ -1,7 +1,6 @@
 # UAPI Header export list
 include include/uapi/asm-generic/Kbuild.asm
 
-generic-y += bpf_perf_event.h
 generic-y += param.h
 generic-y += poll.h
 generic-y += resource.h
diff --git a/arch/powerpc/include/uapi/asm/bpf_perf_event.h b/arch/powerpc/include/uapi/asm/bpf_perf_event.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#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__ */
