Hi Bin 2018-04-06 9:47 GMT+02:00 Bin Meng <bmeng...@gmail.com>: > Hi Christian, > > On Fri, Apr 6, 2018 at 2:55 PM, Christian Gmeiner > <christian.gmei...@gmail.com> wrote: >> Hi >> >> I tried my luck on the u-boot irc channel but nobody cared so I am >> asking this here again. >> Does cpu_get_count(..) return the number of physical CPUs or the >> number of logical CPUs? >> >> I am currently preparing a patch set which adds >> arch/x86/cpu/queensbay/cpu.c and there I need >> to specify a struct cpu_ops with a function called get_count(). But >> what must I return (physical vs. logical CPU count)? >> > > It's logical CPUs, say you have one physical CPU, each with > dual-threads, so get_count() returns 2. >
Good to know. I am looking into an issue where vxworks 7 intel gen is not able to detect the correct amount of physical and logical CPUs (on a blob UEFI-Bios). I compared the new platform with an older queensbay based one the there are some discrepancies. As vx7 makes use of a handful of BIOS tables I thought I start at the root (get_count()) and move up. So as a result of this that means that the MP table has one "Processor Entry" per logical CPU - or? I tired to get that information for the spec but failed. > But Intel CrownBay already supports SMP in U-Boot. What patch are you > working on? I am out of office today and do not have access to my wip git rep :( But I needed to set some speed frequency registers.. but can tell you more on Monday. -- greets -- Christian Gmeiner, MSc https://christian-gmeiner.info _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
