Re: [kvm-unit-tests PATCH 2/2] s390x: Fix is_pv check in run script

["Nicholas Piggin" <npiggin@gmail.com>]

On Mon Apr 8, 2024 at 9:36 PM AEST, Claudio Imbrenda wrote:
> On Sat,  6 Apr 2024 22:24:54 +1000
> Nicholas Piggin <npiggin@gmail.com> wrote:
>
> > Shellcheck reports "is_pv references arguments, but none are ever
> > passed." and suggests "use is_pv "$@" if function's $1 should mean
> > script's $1."
> > 
> > The is_pv test does not evaluate to true for .pv.bin file names, only
> > for _PV suffix test names. The arch_cmd_s390x() function appends
> > .pv.bin to the file name AND _PV to the test name, so this does not
> > affect run_tests.sh runs, but it might prevent PV tests from being
> > run directly with the s390x-run command.
> > 
> > Reported-by: shellcheck SC2119, SC2120
> > Reviewed-by: Andrew Jones <andrew.jones@linux.dev>
> > Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
>
> Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
> Fixes: bcedc5a2 ("s390x: run PV guests with confidential guest enabled")

Thanks.

> although tbh I would rewrite it to check a variable, something like:
>
> IS_PV=no
> [ "${1: -7}" = ".pv.bin" -o "${TESTNAME: -3}" = "_PV" ] && IS_PV=yes

I don't have a problem if you want to fix it a different way
instead. I don't have a good way to test at the moment and
this seemed the simplest fix. Shout out if you don't want it
going upstream as is.

Thanks,
Nick

>
> > ---
> >  s390x/run | 8 ++++----
> >  1 file changed, 4 insertions(+), 4 deletions(-)
> > 
> > diff --git a/s390x/run b/s390x/run
> > index e58fa4af9..34552c274 100755
> > --- a/s390x/run
> > +++ b/s390x/run
> > @@ -21,12 +21,12 @@ is_pv() {
> >  	return 1
> >  }
> >  
> > -if is_pv && [ "$ACCEL" = "tcg" ]; then
> > +if is_pv "$@" && [ "$ACCEL" = "tcg" ]; then
>
> if [ "$IS_PV" = "yes" -a "$ACCEL" = "tcg" ]; then
>
> etc...
>
> >  	echo "Protected Virtualization isn't supported under TCG"
> >  	exit 2
> >  fi
> >  
> > -if is_pv && [ "$MIGRATION" = "yes" ]; then
> > +if is_pv "$@" && [ "$MIGRATION" = "yes" ]; then
> >  	echo "Migration isn't supported under Protected Virtualization"
> >  	exit 2
> >  fi
> > @@ -34,12 +34,12 @@ fi
> >  M='-machine s390-ccw-virtio'
> >  M+=",accel=$ACCEL$ACCEL_PROPS"
> >  
> > -if is_pv; then
> > +if is_pv "$@"; then
> >  	M+=",confidential-guest-support=pv0"
> >  fi
> >  
> >  command="$qemu -nodefaults -nographic $M"
> > -if is_pv; then
> > +if is_pv "$@"; then
> >  	command+=" -object s390-pv-guest,id=pv0"
> >  fi
> >  command+=" -chardev stdio,id=con0 -device sclpconsole,chardev=con0"