Re: [PATCH 15/20] ARM/hw_breakpoint: Convert to hotplug state machine

[Linus Walleij]

On Mon, Jan 2, 2017 at 3:15 PM, Linus Walleij <linus.walleij@xxxxxxxxxx> wrote:

> Something hits a brick wall when initializing the hardware breakpoints.

Should be noted that since I'm not using the breakpoints, the dirtyfix is to put

return 0;

in the first line of arch_hw_breakpoint_init() in
arch/arm/kernel/hw_breakpoint.c

I suspect that is not an accepable solution ...

It hangs at PC is at write_wb_reg+0x20c/0x330
Which is c03101dc, and looks like this in objdump -d:

c031020c:       ee001eba        mcr     14, 0, r1, cr0, cr10, {5}
c0310210:       eaffffb3        b       c03100e4 <write_wb_reg+0x114>
c0310214:       ee001eb9        mcr     14, 0, r1, cr0, cr9, {5}
c0310218:       eaffffb1        b       c03100e4 <write_wb_reg+0x114>
c031021c:       ee001eb8        mcr     14, 0, r1, cr0, cr8, {5}
c0310220:       eaffffaf        b       c03100e4 <write_wb_reg+0x114>
c0310224:       ee001eb7        mcr     14, 0, r1, cr0, cr7, {5}
c0310228:       eaffffad        b       c03100e4 <write_wb_reg+0x114>
c031022c:       ee001eb6        mcr     14, 0, r1, cr0, cr6, {5}
c0310230:       eaffffab        b       c03100e4 <write_wb_reg+0x114>
c0310234:       ee001eb5        mcr     14, 0, r1, cr0, cr5, {5}
c0310238:       eaffffa9        b       c03100e4 <write_wb_reg+0x114>

No idea if this helps.

Yours,
Linus Walleij