On Thu, 2018-04-05 at 17:56:30 UTC, Nicholas Piggin wrote:
> This crashes with a "Bad real address for load" attempting to load
> from the vmalloc region in realmode (faulting address is in DAR).
> Oops: Bad interrupt in KVM entry/exit code, sig: 6 [#1]
> LE SMP NR_CPUS=2048 NUMA PowerNV
> CPU: 53 PID: 6582 Comm: qemu-system-ppc Not tainted
> NIP: c0000000000155ac LR: c0000000000c2430 CTR: c000000000015580
> REGS: c000000fff76dd80 TRAP: 0200 Not tainted
> MSR: 9000000000201003 <SF,HV,ME,RI,LE> CR: 48082222 XER: 00000000
> CFAR: 0000000102900ef0 DAR: d00017fffd941a28 DSISR: 00000040 SOFTE: 3
> NIP [c0000000000155ac] perf_trace_tlbie+0x2c/0x1a0
> LR [c0000000000c2430] do_tlbies+0x230/0x2f0
> I suspect the reason is the per-cpu data is not in the linear chunk.
> This could be restored if that was able to be fixed, but for now,
> just remove the tracepoints.
> Fixes: 0428491cba ("powerpc/mm: Trace tlbie(l) instructions")
> Signed-off-by: Nicholas Piggin <npig...@gmail.com>
Applied to powerpc fixes, thanks.