On Thu, Apr 17, 2025 at 06:06:14PM -0300, Gustavo Romero wrote:
> Hi Igor and Michael,
> 
> On 4/10/25 13:22, Gustavo Romero wrote:
> > Hi Igor,
> > 
> > On 4/10/25 03:50, Igor Mammedov wrote:
> > > On Wed, 9 Apr 2025 12:49:36 -0300
> > > Gustavo Romero <gustavo.rom...@linaro.org> wrote:
> > > 
> > > > Hi Igor,
> > > > 
> > > > On 4/9/25 11:05, Igor Mammedov wrote:
> > > > > On Fri, 4 Apr 2025 00:01:22 -0300
> > > > > Gustavo Romero <gustavo.rom...@linaro.org> wrote:
> > > > > > Hi Phil,
> > > > > > 
> > > > > > On 4/3/25 17:40, Philippe Mathieu-Daudé wrote:
> > > > > > > We are going to fix the test_acpi_aarch64_virt_tcg_its_off()
> > > > > > > test. In preparation, copy the ACPI tables which will be
> > > > > > > altered as 'its_off' variants, and whitelist them.
> > > > > > > 
> > > > > > > Reviewed-by: Gustavo Romero <gustavo.rom...@linaro.org>
> > > > > > > Signed-off-by: Philippe Mathieu-Daudé <phi...@linaro.org>
> > > > > > > ---
> > > > > > >     tests/qtest/bios-tables-test-allowed-diff.h |   3 +++
> > > > > > >     tests/qtest/bios-tables-test.c              |   1 +
> > > > > > >     tests/data/acpi/aarch64/virt/APIC.its_off   | Bin 0 -> 184 
> > > > > > > bytes
> > > > > > >     tests/data/acpi/aarch64/virt/FACP.its_off   | Bin 0 -> 276 
> > > > > > > bytes
> > > > > > >     tests/data/acpi/aarch64/virt/IORT.its_off   | Bin 0 -> 236 
> > > > > > > bytes
> > > > > > >     5 files changed, 4 insertions(+)
> > > > > > >     create mode 100644 tests/data/acpi/aarch64/virt/APIC.its_off
> > > > > > >     create mode 100644 tests/data/acpi/aarch64/virt/FACP.its_off
> > > > > > >     create mode 100644 tests/data/acpi/aarch64/virt/IORT.its_off
> > > > > > > 
> > > > > > > diff --git a/tests/qtest/bios-tables-test-allowed-diff.h 
> > > > > > > b/tests/qtest/bios-tables-test-allowed-diff.h
> > > > > > > index dfb8523c8bf..3421dd5adf3 100644
> > > > > > > --- a/tests/qtest/bios-tables-test-allowed-diff.h
> > > > > > > +++ b/tests/qtest/bios-tables-test-allowed-diff.h
> > > > > > > @@ -1 +1,4 @@
> > > > > > >     /* List of comma-separated changed AML files to ignore */
> > > > > > > +"tests/data/acpi/aarch64/virt/APIC.its_off",
> > > > > > > +"tests/data/acpi/aarch64/virt/FACP.its_off",
> > > > > > > +"tests/data/acpi/aarch64/virt/IORT.its_off",
> > > > > > 
> > > > > > I think your first approach is the correct one: you add the blobs
> > > > > > when adding the new test, so they would go into patch 5/9 in this 
> > > > > > series,
> > > > > > making the test pass without adding anything to 
> > > > > > bios-tables-test-allowed-diff.h.
> > > > > > Then in this patch only add the APIC.its_off table to the 
> > > > > > bios-tables-test-allowed-diff.h
> > > > > > since that's the table that changes when the fix is in place, as 
> > > > > > you did in:
> > > > > 
> > > > > if APIC.its_off is the only one that's changing, but FACP/IORT blobs 
> > > > > are the same
> > > > > as suffix-less blobs, one can omit copying FACP/IORT as test harness 
> > > > > will fallback
> > > > > to suffix-less blob if the one with suffix isn't found.
> > > > 
> > > > OK. Just clarifying and for the records, this is not the case for this 
> > > > series
> > > > 
> > > > 
> > > > > if blobs are different from defaults then create empty blobs and 
> > > > > whitelist them in the same patch
> > > > > then do your changes and then update blobs & wipeout withe list.
> > > > 
> > > > Thanks for confirming it. That's what I suggested to Phil in my first 
> > > > review and what
> > > > I understood from the prescription in bios-tables-test.c.
> > > > 
> > > > However, on second thoughts, for this particular series, isn't it 
> > > > better to have the following commit sequence instead:
> > > > 
> > > > 1) Add the new test and the new blobs that make the test pass, i.e. 
> > > > APIC.suffix, FACP.suffix, and IORT.suffix (they are different than the 
> > > > default suffix-less blobs)
> > > 
> > > blobs should be a separate commit (that way it's easier for maintainer to 
> > > rebase them,
> > > if they clash during merge with some other change.
> > 
> > I see. What is a bit confusing here is that the series consists in
> > one blob addition act (for the new test) and one blob update/removal act 
> > (after the fix).
> > 
> > 
> > > > 2) Whitelist only the APIC.suffix since that's the table that will 
> > > > change with the fix
> > > > 3) Add the fix (which changes the APIC table so a new APIC.suffix blob 
> > > > is needed and also stops generating the IORT table, so no more 
> > > > IORT.suffix blob is necessary)
> > > > 4) Finally, update only the APIC.suffix blob and remove the IORT.suffix 
> > > > blob and wipe out the whitelist
> > > > 
> > > > This way:
> > > > 
> > > > A) It's clear that only ACPI blob changed with the fix, because there 
> > > > is no addition of a FACP.suffix blob in 4) (it remains the same)
> > > > B) It's clear that the IORT table is removed with the fix and is not 
> > > > relevant anymore for the test
> > > 
> > > I'd just mention it in commit log so  that later no one would wonder why 
> > > we are adding and then removing tables
> > > 
> > > As for the rest of suggestions, it looks fine to me.
> > 
> > Well, 2) won't make sense anymore since APIC.suffix would be already in the
> > whitelist in the previous patch that added the empty blobs. Since there 
> > won't
> > be a commit that adds _only_ the APIC.suffix to the whitelist, in 
> > preparation
> > for the fix, this info is "lost" in the series, even tho it's possible to
> > mention in the commit message.
> > 
> > Hence, what I think is not ideal from a maintainer's/reviewer's perspective,
> > is that in one commit all the blobs are updated/removed at once, which is
> > confusing because the fix did not touch the FACP table (for instance) and
> > this table is updated with APIC and with the removal of IORT, altogether,
> > in the last commit.
> > 
> > So, for this series, which adds new blobs and _also_ updates and removes 
> > some
> > of them, how about the following organization:
> > 
> > - Patch 1     : Add the new test, add the empty blobs *.suffix files, 
> > whitelist such a blobs
> > - Patch 2     : Update the blobs in Patch 1 with the ones that make the new 
> > test pass and remove them from the whitelist
> > 
> > - Patch 3     : Add the APIC.suffix blob to the whitelist (the table that 
> > changes due to the fix)
> > - Patch 4 - n : Fix(es)
> > - Patch (n+1) : Update the APIC.suffix blob, remove IORT.suffix blob, and 
> > remove the APIC.suffix blob from the whitelist
> >                * Add the APIC diff to the commit log
> >                * Mention in the commit log that IORT.suffix is removed 
> > because IORT table is no long generated after the fix
> > 
> > This way: a) no commit fails the test and b) blobs are 
> > added/updated/removed in separate commits
> > 
> > What do you think?
> 
> I’d really appreciate it if you could confirm whether this organization makes 
> sense.
> 
> 
> Cheers,
> Gustavo

looks ok. Igor?


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