| Message ID | 51a8060493e1220886dcd468fad9a2b603607297.1639490264.git.robin.murphy@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | arm64: PMU updates | expand |
On 14/12/2021 14:16, Robin Murphy wrote: > DSU-110 is the newest and shiniest for Armv9. Its programmer's model is > largely identical to the previous generation of DSUs, so we can treat it > as compatible, but it does have a a handful of extra IMP-DEF PMU events > to call its own. Thanks to the new notion of core complexes, the maximum > number of supported CPUs goes up as well. > > Signed-off-by: Robin Murphy <robin.murphy@arm.com> > --- > > v2: Also make it complete and valid > > Documentation/devicetree/bindings/perf/arm,dsu-pmu.yaml | 8 ++++++-- > 1 file changed, 6 insertions(+), 2 deletions(-) > > diff --git a/Documentation/devicetree/bindings/perf/arm,dsu-pmu.yaml b/Documentation/devicetree/bindings/perf/arm,dsu-pmu.yaml > index 09ddeb6a3ccc..7f31bcecedb5 100644 > --- a/Documentation/devicetree/bindings/perf/arm,dsu-pmu.yaml > +++ b/Documentation/devicetree/bindings/perf/arm,dsu-pmu.yaml > @@ -21,7 +21,11 @@ description: > > properties: > compatible: > - const: arm,dsu-pmu > + oneOf: > + - const: arm,dsu-pmu > + - items: > + - const: arm,dsu-110-pmu > + - const: arm,dsu-pmu Couldn't this be : compatible: oneOf: - const: arm,dsu-110-pmu - const: arm,dsu-pmu Otherwise, looks good to me. Suzuki
On 2021-12-14 14:42, Suzuki K Poulose wrote: > On 14/12/2021 14:16, Robin Murphy wrote: >> DSU-110 is the newest and shiniest for Armv9. Its programmer's model is >> largely identical to the previous generation of DSUs, so we can treat it >> as compatible, but it does have a a handful of extra IMP-DEF PMU events >> to call its own. Thanks to the new notion of core complexes, the maximum >> number of supported CPUs goes up as well. >> >> Signed-off-by: Robin Murphy <robin.murphy@arm.com> >> --- >> >> v2: Also make it complete and valid >> >> Documentation/devicetree/bindings/perf/arm,dsu-pmu.yaml | 8 ++++++-- >> 1 file changed, 6 insertions(+), 2 deletions(-) >> >> diff --git a/Documentation/devicetree/bindings/perf/arm,dsu-pmu.yaml >> b/Documentation/devicetree/bindings/perf/arm,dsu-pmu.yaml >> index 09ddeb6a3ccc..7f31bcecedb5 100644 >> --- a/Documentation/devicetree/bindings/perf/arm,dsu-pmu.yaml >> +++ b/Documentation/devicetree/bindings/perf/arm,dsu-pmu.yaml >> @@ -21,7 +21,11 @@ description: >> properties: >> compatible: >> - const: arm,dsu-pmu >> + oneOf: >> + - const: arm,dsu-pmu >> + - items: >> + - const: arm,dsu-110-pmu >> + - const: arm,dsu-pmu > > Couldn't this be : > > compatible: > oneOf: > - const: arm,dsu-110-pmu > - const: arm,dsu-pmu > > Otherwise, looks good to me. My intent here was for the new case to use both strings and thus still permit a less-specific match to the original one (hence why there's no change to the actual driver included here). It's a true "compatible" in the sense that you can run the thing with the existing driver as if it's a 1st-gen DSU and get the expected results - at least that's the conclusion I drew from a side-by-side comparison of the TRMs, and the folks testing FPGAs haven't complained since I told them to try it months ago :) Thanks, Robin.
On 14/12/2021 14:59, Robin Murphy wrote: > On 2021-12-14 14:42, Suzuki K Poulose wrote: >> On 14/12/2021 14:16, Robin Murphy wrote: >>> DSU-110 is the newest and shiniest for Armv9. Its programmer's model is >>> largely identical to the previous generation of DSUs, so we can treat it >>> as compatible, but it does have a a handful of extra IMP-DEF PMU events >>> to call its own. Thanks to the new notion of core complexes, the maximum >>> number of supported CPUs goes up as well. >>> >>> Signed-off-by: Robin Murphy <robin.murphy@arm.com> >>> --- >>> >>> v2: Also make it complete and valid >>> >>> Documentation/devicetree/bindings/perf/arm,dsu-pmu.yaml | 8 ++++++-- >>> 1 file changed, 6 insertions(+), 2 deletions(-) >>> >>> diff --git a/Documentation/devicetree/bindings/perf/arm,dsu-pmu.yaml >>> b/Documentation/devicetree/bindings/perf/arm,dsu-pmu.yaml >>> index 09ddeb6a3ccc..7f31bcecedb5 100644 >>> --- a/Documentation/devicetree/bindings/perf/arm,dsu-pmu.yaml >>> +++ b/Documentation/devicetree/bindings/perf/arm,dsu-pmu.yaml >>> @@ -21,7 +21,11 @@ description: >>> properties: >>> compatible: >>> - const: arm,dsu-pmu >>> + oneOf: >>> + - const: arm,dsu-pmu >>> + - items: >>> + - const: arm,dsu-110-pmu >>> + - const: arm,dsu-pmu >> >> Couldn't this be : >> >> compatible: >> oneOf: >> - const: arm,dsu-110-pmu >> - const: arm,dsu-pmu >> >> Otherwise, looks good to me. > > My intent here was for the new case to use both strings and thus still > permit a less-specific match to the original one (hence why there's no > change to the actual driver included here). It's a true "compatible" in > the sense that you can run the thing with the existing driver as if it's > a 1st-gen DSU and get the expected results - at least that's the > conclusion I drew from a side-by-side comparison of the TRMs, and the > folks testing FPGAs haven't complained since I told them to try it > months ago :) Ah, right. I should have guessed it from the lack of update to the driver. Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
On Tue, 14 Dec 2021 14:16:17 +0000, Robin Murphy wrote: > DSU-110 is the newest and shiniest for Armv9. Its programmer's model is > largely identical to the previous generation of DSUs, so we can treat it > as compatible, but it does have a a handful of extra IMP-DEF PMU events > to call its own. Thanks to the new notion of core complexes, the maximum > number of supported CPUs goes up as well. > > Signed-off-by: Robin Murphy <robin.murphy@arm.com> > --- > > v2: Also make it complete and valid > > Documentation/devicetree/bindings/perf/arm,dsu-pmu.yaml | 8 ++++++-- > 1 file changed, 6 insertions(+), 2 deletions(-) > Applied, thanks!
diff --git a/Documentation/devicetree/bindings/perf/arm,dsu-pmu.yaml b/Documentation/devicetree/bindings/perf/arm,dsu-pmu.yaml index 09ddeb6a3ccc..7f31bcecedb5 100644 --- a/Documentation/devicetree/bindings/perf/arm,dsu-pmu.yaml +++ b/Documentation/devicetree/bindings/perf/arm,dsu-pmu.yaml @@ -21,7 +21,11 @@ description: properties: compatible: - const: arm,dsu-pmu + oneOf: + - const: arm,dsu-pmu + - items: + - const: arm,dsu-110-pmu + - const: arm,dsu-pmu interrupts: items: @@ -30,7 +34,7 @@ properties: cpus: $ref: /schemas/types.yaml#/definitions/phandle-array minItems: 1 - maxItems: 8 + maxItems: 12 description: List of phandles for the CPUs connected to this DSU instance. required:
DSU-110 is the newest and shiniest for Armv9. Its programmer's model is largely identical to the previous generation of DSUs, so we can treat it as compatible, but it does have a a handful of extra IMP-DEF PMU events to call its own. Thanks to the new notion of core complexes, the maximum number of supported CPUs goes up as well. Signed-off-by: Robin Murphy <robin.murphy@arm.com> --- v2: Also make it complete and valid Documentation/devicetree/bindings/perf/arm,dsu-pmu.yaml | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)