Hi Bin
2018-04-06 10:30 GMT+02:00 Christian Gmeiner christian.gmeiner@gmail.com:
Hi Bin
2018-04-06 9:47 GMT+02:00 Bin Meng bmeng.cn@gmail.com:
Hi Christian,
On Fri, Apr 6, 2018 at 2:55 PM, Christian Gmeiner christian.gmeiner@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.
Okay.. yeah I need to configure speed: https://hastebin.com/toqihobali.cpp
So the end result is to get all BIOS tables standard conform and vx7 should be happy - I hope.