On Thu, Jun 11, 2015 at 04:19:04PM +0200, Borislav Petkov wrote: > On Thu, Jun 11, 2015 at 10:14:10PM +0800, Huang Rui wrote: > > On AMD Carrizo processors (Family 15h, Model 60h-6fh), there is a new > > feature called MWAITT (Mwait with a timer) as an extension of > > Monitor/Mwait. > > > > MWAITT, another name is MWAITX (MWAIT with extensions), has a configurable > > timer that causes MWAITX to exit on expiration. > > > > Compared with MONITOR/MWAIT, there are minor differences in opcode and > > input parameters. > > > > MWAITX ECX[1]: enable timer if set > > MWAITX EBX[31:0]: max wait time expressed in SW P0 clocks > > > > MWAIT MWAITX > > opcode 0f 01 c9 | 0f 01 fb > > ECX[0] value of RFLAGS.IF seen by instruction > > ECX[1] unused/#GP if set | enable timer if set > > ECX[31:2] unused/#GP if set > > EAX unused (reserve for hint) > > EBX[31:0] unused | max wait time (loops) > > > > MONITOR MONITORX > > opcode 0f 01 c8 | 0f 01 fa > > EAX (logical) address to monitor > > ECX #GP if not zero > > > > The software P0 frequency is the same as the TSC frequency. > > > > Max timeout = EBX/(TSC frequency) > > As suggested last time, please put the description of MWAITX over > __mwaitx() in the code as comments below. See below. >
Apology to miss that. Will do it at once. Thanks, Rui -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
