On 2/22/24 12:59 AM, Verma, Vishal L wrote:
> On Thu, 2024-02-08 at 13:11 -0700, Dave Jiang wrote:
>> Add tests in cxl-qos-class.sh to verify qos_class are set with the fake
>> qos_class create by the kernel. Root decoders should have qos_class
>> attribute set. Memory devices should have ram_qos_class or pmem_qos_class
>> set depending on which partitions are valid.
>>
>> Signed-off-by: Dave Jiang <dave.ji...@intel.com>
>> ---
>> v7:
>> - Add create_region -Q testing (Vishal)
>> ---
>> test/common | 4 ++
>> test/cxl-qos-class.sh | 102 ++++++++++++++++++++++++++++++++++++++++++
>> test/meson.build | 2 +
>> 3 files changed, 108 insertions(+)
>> create mode 100755 test/cxl-qos-class.sh
>>
>> diff --git a/test/common b/test/common
>> index f1023ef20f7e..5694820c7adc 100644
>> --- a/test/common
>> +++ b/test/common
>> @@ -150,3 +150,7 @@ check_dmesg()
>> grep -q "Call Trace" <<< $log && err $1
>> true
>> }
>> +
>> +
>> +# CXL COMMON
>> +TEST_QOS_CLASS=42
>> diff --git a/test/cxl-qos-class.sh b/test/cxl-qos-class.sh
>> new file mode 100755
>> index 000000000000..145df6134685
>> --- /dev/null
>> +++ b/test/cxl-qos-class.sh
>> @@ -0,0 +1,102 @@
>> +#!/bin/bash
>> +# SPDX-License-Identifier: GPL-2.0
>> +# Copyright (C) 2024 Intel Corporation. All rights reserved.
>> +
>> +. $(dirname $0)/common
>> +
>> +rc=77
>> +
>> +set -ex
>> +
>> +trap 'err $LINENO' ERR
>> +
>> +check_prereq "jq"
>> +
>> +modprobe -r cxl_test
>> +modprobe cxl_test
>> +rc=1
>> +
>> +check_qos_decoders () {
>> + # check root decoders have expected fake qos_class
>> + # also make sure the number of root decoders equal to the number
>> + # with qos_class found
>> + json=$($CXL list -b cxl_test -D -d root)
>> + decoders=$(echo "$json" | jq length)
>> + count=0
>> + while read -r qos_class
>> + do
>> + ((qos_class == TEST_QOS_CLASS)) || err "$LINENO"
>> + count=$((count+1))
>> + done <<< "$(echo "$json" | jq -r '.[] | .qos_class')"
>> +
>> + ((count == decoders)) || err "$LINENO";
>> +}
>> +
>> +check_qos_memdevs () {
>> + # Check that memdevs that expose ram_qos_class or pmem_qos_class have
>> + # expected fake value programmed.
>> + json=$(cxl list -b cxl_test -M)
>> + readarray -t lines < <(jq ".[] | .ram_size, .pmem_size, .ram_qos_class,
>> .pmem_qos_class" <<<"$json")
>> + for (( i = 0; i < ${#lines[@]}; i += 4 ))
>> + do
>> + ram_size=${lines[i]}
>> + pmem_size=${lines[i+1]}
>> + ram_qos_class=${lines[i+2]}
>> + pmem_qos_class=${lines[i+3]}
>> +
>> + if [[ "$ram_size" != null ]]
>> + then
>> + ((ram_qos_class == TEST_QOS_CLASS)) || err "$LINENO"
>> + fi
>> + if [[ "$pmem_size" != null ]]
>> + then
>> + ((pmem_qos_class == TEST_QOS_CLASS)) || err "$LINENO"
>> + fi
>> + done
>> +}
>> +
>> +# Based on cxl-create-region.sh create_single()
>> +destroy_regions()
>> +{
>> + if [[ "$*" ]]; then
>> + $CXL destroy-region -f -b cxl_test "$@"
>> + else
>> + $CXL destroy-region -f -b cxl_test all
>> + fi
>> +}
>> +
>> +create_region_check_qos()
>> +{
>> + # the 5th cxl_test decoder is expected to target a single-port
>> + # host-bridge. Older cxl_test implementations may not define it,
>> + # so skip the test in that case.
>> + decoder=$($CXL list -b cxl_test -D -d root |
>> + jq -r ".[4] |
>> + select(.pmem_capable == true) |
>> + select(.nr_targets == 1) |
>> + .decoder")
>
> Instead of assuming the 5th decoder, can we select based on some
> property of the decoder or its parentage? This works, but it's a bit
> sensitive to future cxl_test topology changes that will easily and
> (more importantly) silently break this part of the test (since we skip
> but still pass).
I copied it straight from cxl-topology.sh. It can be any really. All cxl_test
setup should have qos_class. I would imagine cxl-topology.sh would also break
if there's some future change
>
>> +
>> + if [[ ! $decoder ]]; then
>> + echo "no single-port host-bridge decoder found, skipping"
>> + return
>> + fi
>
> I think there's some space/tab mixing going on here.
I'll fix.
>
>> +
>> + # Send create-region with -Q to enforce qos_class matching
>> + region=$($CXL create-region -Q -d "$decoder" | jq -r ".region")
>> + if [[ ! $region ]]; then
>> + echo "failed to create single-port host-bridge region"
>> + err "$LINENO"
>> + fi
>> +
>> + destroy_regions "$region"
>> +}
>> +
>> +check_qos_decoders
>> +
>> +check_qos_memdevs
>> +
>> +create_region_check_qos
>> +
>> +check_dmesg "$LINEO"
>> +
>> +modprobe -r cxl_test
>> diff --git a/test/meson.build b/test/meson.build
>> index 5eb35749a95b..4892df11119f 100644
>> --- a/test/meson.build
>> +++ b/test/meson.build
>> @@ -160,6 +160,7 @@ cxl_events = find_program('cxl-events.sh')
>> cxl_poison = find_program('cxl-poison.sh')
>> cxl_sanitize = find_program('cxl-sanitize.sh')
>> cxl_destroy_region = find_program('cxl-destroy-region.sh')
>> +cxl_qos_class = find_program('cxl-qos-class.sh')
>>
>> tests = [
>> [ 'libndctl', libndctl, 'ndctl' ],
>> @@ -192,6 +193,7 @@ tests = [
>> [ 'cxl-poison.sh', cxl_poison, 'cxl' ],
>> [ 'cxl-sanitize.sh', cxl_sanitize, 'cxl' ],
>> [ 'cxl-destroy-region.sh', cxl_destroy_region, 'cxl' ],
>> + [ 'cxl-qos-class.sh', cxl_qos_class, 'cxl' ],
>> ]
>>
>> if get_option('destructive').enabled()
>
