Re: [PATCH v3 1/3] selftests: kvm: s390: Add uc_map_unmap VM test case

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On Mon Sep 16, 2024 at 8:33 AM CEST, Janosch Frank wrote:
> On 9/16/24 8:25 AM, Christoph Schlameuss wrote:
> > On Fri Sep 13, 2024 at 6:48 PM CEST, Claudio Imbrenda wrote:
> >> On Fri, 13 Sep 2024 13:52:46 +0200
> >> Christoph Schlameuss <schlameuss@xxxxxxxxxxxxx> wrote:
> >>
> >>> Add a test case verifying basic running and interaction of ucontrol VMs.
> >>> Fill the segment and page tables for allocated memory and map memory on
> >>> first access.
> >>>
> >>> * uc_map_unmap
> >>>    Store and load data to mapped and unmapped memory and use pic segment
> >>>    translation handling to map memory on access.
> >>>
> >>> Signed-off-by: Christoph Schlameuss <schlameuss@xxxxxxxxxxxxx>
> >>> ---
> >>>   .../selftests/kvm/s390x/ucontrol_test.c       | 145 +++++++++++++++++-
> >>>   1 file changed, 144 insertions(+), 1 deletion(-)
> >>>
> >>> diff --git a/tools/testing/selftests/kvm/s390x/ucontrol_test.c b/tools/testing/selftests/kvm/s390x/ucontrol_test.c
> >>> index 030c59010fe1..084cea02c2fa 100644
> >>> --- a/tools/testing/selftests/kvm/s390x/ucontrol_test.c
> >>> +++ b/tools/testing/selftests/kvm/s390x/ucontrol_test.c
> >>
> >> [...]
> >>
> >>> base_gpa + self->code_gpa;
> >>> @@ -222,6 +244,60 @@ TEST(uc_cap_hpage)
> >>>   	close(kvm_fd);
> >>>   }
> >>>   
> >>> +/* calculate host virtual addr from guest physical addr */
> >>> +static void *gpa2hva(FIXTURE_DATA(uc_kvm) * self, u64 gpa)
> >>
> >> why the space? I would have expected *self
> >>
> > 
> > That is how checkpatch.pl --strict prefers it.
> > 
> > Output from checkpatch without the space:
> > 
> > CHECK: spaces preferred around that '*' (ctx:WxV)
> > #19: FILE: tools/testing/selftests/kvm/s390x/ucontrol_test.c:278:
> > +static void *gpa2hva(FIXTURE_DATA(uc_kvm) *self, u64 gpa)
>
> I'd guess checkpatch thinks this is a multiplication and that's why it 
> complains here. It's checking against the wrong rule.

I see. I did experiment a bit. There is no obvious way to get rid of the CHECK
notices from checkpatch.pl. But I will correct the whitespaces for the function
calls.





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