[RFC,0/6] ARC: merge HAPS-HS with nSIM-HS configs
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Message ID 20191018121545.8907-1-Eugeniy.Paltsev@synopsys.com
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  • ARC: merge HAPS-HS with nSIM-HS configs
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Eugeniy Paltsev Oct. 18, 2019, 12:15 p.m. UTC
Starting from nSIM 2019.06 is possible to use DW UART
instead of ARC UART. That allows us to merge
"nsim_hs" with "haps_hs" and "nsim_hs_smp" with "haps_hs_smp"
mith some minor changes.

We eliminate nsim_hs_defconfig and nsim_hs_smp_defconfig
and leave haps_hs_defconfig and haps_hs_smp_defconfig
which can be used on HAPS / nSIM / ZEBU / QEMU platforms
without additionall changes in Linux kernel.

Eugeniy Paltsev (6):
  ARC: regenerate nSIM and HAPS defconfigs
  ARC: HAPS: cleanup defconfigs from unused IO-related options
  ARC: HAPS: use same UART configuration everywhere
  ARC: HAPS: add HIGHMEM memory zone to DTS
  ARC: HAPS: cleanup defconfigs from unused ETH drivers
  ARC: merge HAPS-HS with nSIM-HS configs

 arch/arc/boot/dts/haps_hs.dts          | 15 +++---
 arch/arc/boot/dts/haps_hs_idu.dts      |  1 -
 arch/arc/boot/dts/nsim_hs.dts          | 67 --------------------------
 arch/arc/boot/dts/nsim_hs_idu.dts      | 65 -------------------------
 arch/arc/configs/haps_hs_defconfig     | 30 +++---------
 arch/arc/configs/haps_hs_smp_defconfig | 32 +++---------
 arch/arc/configs/nsim_hs_defconfig     | 60 -----------------------
 arch/arc/configs/nsim_hs_smp_defconfig | 58 ----------------------
 arch/arc/plat-sim/platform.c           |  1 -
 9 files changed, 22 insertions(+), 307 deletions(-)
 delete mode 100644 arch/arc/boot/dts/nsim_hs.dts
 delete mode 100644 arch/arc/boot/dts/nsim_hs_idu.dts
 delete mode 100644 arch/arc/configs/nsim_hs_defconfig
 delete mode 100644 arch/arc/configs/nsim_hs_smp_defconfig

Comments

Vineet Gupta Oct. 18, 2019, 6:48 p.m. UTC | #1
On 10/18/19 5:15 AM, Eugeniy Paltsev wrote:
> Starting from nSIM 2019.06 is possible to use DW UART
> instead of ARC UART. That allows us to merge
> "nsim_hs" with "haps_hs" and "nsim_hs_smp" with "haps_hs_smp"
> mith some minor changes.
> 
> We eliminate nsim_hs_defconfig and nsim_hs_smp_defconfig
> and leave haps_hs_defconfig and haps_hs_smp_defconfig
> which can be used on HAPS / nSIM / ZEBU / QEMU platforms
> without additionall changes in Linux kernel.

Thx for doing this, I was planning to do this myself.

But remember that doing this will disturb existing nsim setups
- Our internal linux/gnu regression jobs one of which tracks my for-curr and will
  fail immediately
- uClibc-ng maintainer who also seems to use nsim AFAIK for regression runs

So we need to notify parties involves (and it would be best that we align this to
a kernel release which anyways will be next one.

Also go thru the github wiki pages and wherever applicable please add the config
info for nsim (keep the old settings there for reference as well)

Thx,
-Vineet
Eugeniy Paltsev Oct. 22, 2019, 6:18 p.m. UTC | #2
Btw, about nSIM regression runs:
We are using UP configuration for all nSIM runs and I propose to use pseudo-SMP  configuration (SMP configuration with only one CPU online) instead as our main target are SMP systems.

So -
run our verification jobs on both UP and pseudo-SMP nSIM
run uClibc-ng regression on pseudo-SMP only

 Any objections / thoughts?
---
 Eugeniy Paltsev
Vineet Gupta Oct. 22, 2019, 6:24 p.m. UTC | #3
Ok but this if off topic and not directly related to patches - or am I missing something.

Indeed if we run UP only for nsim we should add pseudo SMP and also a true SMP.

For uClibc-ng regression, it doesn't matter what they use and not for us to decide anyways - we just need to tell them (or point to wiki etc) that starting with 5.x kernel,any nsim uart config needs to change of they are using the defconfigs.

-Vineet