From: Mahesh Salgaonkar <mah...@linux.vnet.ibm.com> radix__flush_tlb_all() is called only in kexec path in real mode and any tracepoints at this stage will make kexec to fail if enabled.
To verify enable tlbie trace before kexec. $ echo 1 > /sys/kernel/debug/tracing/events/powerpc/tlbie/enable == kexec into new kernel and kexec fails. Fix this by not calling trace_tlbie from radix__flush_tlb_all(). Fixes: 0428491cba92 ("powerpc/mm: Trace tlbie(l) instructions") Signed-off-by: Mahesh Salgaonkar <mah...@linux.vnet.ibm.com> --- arch/powerpc/mm/tlb-radix.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/powerpc/mm/tlb-radix.c b/arch/powerpc/mm/tlb-radix.c index 884f4b7..913a2b8 100644 --- a/arch/powerpc/mm/tlb-radix.c +++ b/arch/powerpc/mm/tlb-radix.c @@ -600,14 +600,12 @@ void radix__flush_tlb_all(void) */ asm volatile(PPC_TLBIE_5(%0, %4, %3, %2, %1) : : "r"(rb), "i"(r), "i"(1), "i"(ric), "r"(rs) : "memory"); - trace_tlbie(0, 0, rb, rs, ric, prs, r); /* * now flush host entires by passing PRS = 0 and LPID == 0 */ asm volatile(PPC_TLBIE_5(%0, %4, %3, %2, %1) : : "r"(rb), "i"(r), "i"(prs), "i"(ric), "r"(0) : "memory"); asm volatile("eieio; tlbsync; ptesync": : :"memory"); - trace_tlbie(0, 0, rb, 0, ric, prs, r); } void radix__flush_tlb_pte_p9_dd1(unsigned long old_pte, struct mm_struct *mm,