On Wed, Aug 19, 2015 at 05:47:00PM +0200, Borislav Petkov wrote: > On Wed, Aug 19, 2015 at 10:55:46AM +0200, Jiri Olsa wrote: > > this is the perf breakpoint address: > > 000000000045b260 <test_function>: > > > > this is trace_printk output for NEW microcode 0x6000832: > > > > DEBUG EX > > perf-893 [003] d... 1358.053633: sync_regs: sync_regs eregs > > ffff88012ecc7f58, regs ffff8800c9f1bf58 > > perf-893 [003] d... 1358.053635: do_debug: do_debug-1 regs > > ffff8800c9f1bf58, eflags 217, rip 45b260 > > perf-893 [003] d.h. 1358.053641: do_debug: do_debug-2 eflags > > 10217, rip 45b260 > > perf-893 [003] d... 1358.053642: prepare_exit_to_usermode: > > prepare_exit_to_usermode1 regs ffff8800c9f1bf58, eflags 10217, rip 45b260 > > perf-893 [003] d... 1358.053643: prepare_exit_to_usermode: > > prepare_exit_to_usermode3 regs ffff8800c9f1bf58, eflags 10217, rip 45b260 > > Yikes! > > Something cleared EFLAGS.RF here. And the same thing doesn't happen with > the older ucode version. Are you sure nothing happens in-between > prepare_exit_to_usermode() and smp_irq_work_interrupt()?
if anything happens there, I dont see it ;-) I was told RHEL7 went off and on several times with AMD microcode, now it's the period we actually install it.. I'll poke around to see who made that decissions, he/she might know more ;-) jirka -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
