| Message ID | 1686155407-20054-2-git-send-email-quic_ekangupt@quicinc.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Privileged process support on remote subsystem | expand |
On 07/06/2023 18:30, Ekansh Gupta wrote: > Add "qcom,fastrpc-gids" property to the list of optional properties. > This property contains the list of privileged group IDs which is > used to offload process to remote subsystem with increased privileges. Why or when anyone would use this property? > > Signed-off-by: Ekansh Gupta <quic_ekangupt@quicinc.com> > --- > Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml b/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml > index 1ab9588..2a2124f 100644 > --- a/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml > +++ b/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml > @@ -57,6 +57,11 @@ properties: > Virtual machine IDs for remote processor. > $ref: "/schemas/types.yaml#/definitions/uint32-array" > > + qcom,fastrpc-gids: > + description: > + Group IDs for fastrpc. You just pasted here property name. It does not help me to understand what's this. Explain in description. > + $ref: "/schemas/types.yaml#/definitions/uint32-array" Drop quotes. missing min/maxItems. > + > "#address-cells": > const: 1 > > @@ -120,6 +125,7 @@ examples: > qcom,glink-channels = "fastrpcglink-apps-dsp"; > label = "sdsp"; > qcom,non-secure-domain; > + qcom,fastrpc-gids = <2908> Eh, what does 2908 stands for? Why not 3012 or 1842? How anyone can figure this out? Best regards, Krzysztof
On 6/7/2023 10:51 PM, Rob Herring wrote: > > On Wed, 07 Jun 2023 22:00:06 +0530, Ekansh Gupta wrote: >> Add "qcom,fastrpc-gids" property to the list of optional properties. >> This property contains the list of privileged group IDs which is >> used to offload process to remote subsystem with increased privileges. >> >> Signed-off-by: Ekansh Gupta <quic_ekangupt@quicinc.com> >> --- >> Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml | 6 ++++++ >> 1 file changed, 6 insertions(+) >> > > My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check' > on your patch (DT_CHECKER_FLAGS is new in v5.13): > > yamllint warnings/errors: > > dtschema/dtc warnings/errors: > Error: Documentation/devicetree/bindings/misc/qcom,fastrpc.example.dts:36.17-18 syntax error > FATAL ERROR: Unable to parse input tree > make[1]: *** [scripts/Makefile.lib:419: Documentation/devicetree/bindings/misc/qcom,fastrpc.example.dtb] Error 1 > make[1]: *** Waiting for unfinished jobs.... > make: *** [Makefile:1512: dt_binding_check] Error 2 > > doc reference errors (make refcheckdocs): > > See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/1686155407-20054-2-git-send-email-quic_ekangupt@quicinc.com > > The base for the series is generally the latest rc1. A different dependency > should be noted in *this* patch. > > If you already ran 'make dt_binding_check' and didn't see the above > error(s), then make sure 'yamllint' is installed and dt-schema is up to > date: > > pip3 install dtschema --upgrade > > Please check and re-submit after running the above command yourself. Note > that DT_SCHEMA_FILES can be set to your schema file to speed up checking > your schema. However, it must be unset to test all examples with your schema. > Thanks for helping with this information. I'll check and re-submit the patch.
On 6/8/2023 12:14 AM, Krzysztof Kozlowski wrote: > On 07/06/2023 18:30, Ekansh Gupta wrote: >> Add "qcom,fastrpc-gids" property to the list of optional properties. >> This property contains the list of privileged group IDs which is >> used to offload process to remote subsystem with increased privileges. > > Why or when anyone would use this property? > This property can be used for the use cases which requires prioritized access to remote subsystem resources. >> >> Signed-off-by: Ekansh Gupta <quic_ekangupt@quicinc.com> >> --- >> Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml | 6 ++++++ >> 1 file changed, 6 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml b/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml >> index 1ab9588..2a2124f 100644 >> --- a/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml >> +++ b/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml >> @@ -57,6 +57,11 @@ properties: >> Virtual machine IDs for remote processor. >> $ref: "/schemas/types.yaml#/definitions/uint32-array" >> >> + qcom,fastrpc-gids: >> + description: >> + Group IDs for fastrpc. > > You just pasted here property name. It does not help me to understand > what's this. Explain in description. > I'll add more details here when I re-submit the patch. >> + $ref: "/schemas/types.yaml#/definitions/uint32-array" > > Drop quotes. > > missing min/maxItems. > I'll update this in v2. Thanks for reviewing. >> + >> "#address-cells": >> const: 1 >> >> @@ -120,6 +125,7 @@ examples: >> qcom,glink-channels = "fastrpcglink-apps-dsp"; >> label = "sdsp"; >> qcom,non-secure-domain; >> + qcom,fastrpc-gids = <2908> > > Eh, what does 2908 stands for? Why not 3012 or 1842? How anyone can > figure this out? > There is no hard restriction for this value to be 2908, it can be anything. Just that the process which needs a privileged offload to any remote subsystem should have the same gid which is defined here, whether it is 2908 or anything else. The intention of having 2908 in example is because this is used in Android world where any process running with 2908 gid can offload as privileged process to remote subsystem. Ref: https://review.lineageos.org/c/LineageOS/android_device_motorola_sm7250-common/+/305612/4/config.fs But, it can be set to anything just that the process also needs to adapt to this gid. Thanks, Ekansh > Best regards, > Krzysztof >
On 08/06/2023 12:36, Ekansh Gupta wrote: > > > On 6/8/2023 12:14 AM, Krzysztof Kozlowski wrote: >> On 07/06/2023 18:30, Ekansh Gupta wrote: >>> Add "qcom,fastrpc-gids" property to the list of optional properties. >>> This property contains the list of privileged group IDs which is >>> used to offload process to remote subsystem with increased privileges. >> >> Why or when anyone would use this property? >> > This property can be used for the use cases which requires prioritized > access to remote subsystem resources. This does not help me much yet.... Which systems or boards need prioritized access? >>> >>> Signed-off-by: Ekansh Gupta <quic_ekangupt@quicinc.com> >>> --- >>> Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml | 6 ++++++ >>> 1 file changed, 6 insertions(+) >>> >>> diff --git a/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml b/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml >>> index 1ab9588..2a2124f 100644 >>> --- a/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml >>> +++ b/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml >>> @@ -57,6 +57,11 @@ properties: >>> Virtual machine IDs for remote processor. >>> $ref: "/schemas/types.yaml#/definitions/uint32-array" >>> >>> + qcom,fastrpc-gids: >>> + description: >>> + Group IDs for fastrpc. >> >> You just pasted here property name. It does not help me to understand >> what's this. Explain in description. >> > I'll add more details here when I re-submit the patch. >>> + $ref: "/schemas/types.yaml#/definitions/uint32-array" >> >> Drop quotes. >> >> missing min/maxItems. >> > I'll update this in v2. Thanks for reviewing. >>> + >>> "#address-cells": >>> const: 1 >>> >>> @@ -120,6 +125,7 @@ examples: >>> qcom,glink-channels = "fastrpcglink-apps-dsp"; >>> label = "sdsp"; >>> qcom,non-secure-domain; >>> + qcom,fastrpc-gids = <2908> >> >> Eh, what does 2908 stands for? Why not 3012 or 1842? How anyone can >> figure this out? >> > There is no hard restriction for this value to be 2908, it can be > anything. Just that the process which needs a privileged offload to any > remote subsystem should have the same gid which is defined here, whether > it is 2908 or anything else. > > The intention of having 2908 in example is because this is used in > Android world where any process running with 2908 gid can offload as > privileged process to remote subsystem. > Ref: > https://review.lineageos.org/c/LineageOS/android_device_motorola_sm7250-common/+/305612/4/config.fs > > But, it can be set to anything just that the process also needs to adapt > to this gid. So this is process ID? Group ID? GID? Why would you ever encode group IDs, which change in every installation, or process IDs, which change every boot, in DTS common for all devices? This is not a DT property. Best regards, Krzysztof
diff --git a/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml b/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml index 1ab9588..2a2124f 100644 --- a/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml +++ b/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml @@ -57,6 +57,11 @@ properties: Virtual machine IDs for remote processor. $ref: "/schemas/types.yaml#/definitions/uint32-array" + qcom,fastrpc-gids: + description: + Group IDs for fastrpc. + $ref: "/schemas/types.yaml#/definitions/uint32-array" + "#address-cells": const: 1 @@ -120,6 +125,7 @@ examples: qcom,glink-channels = "fastrpcglink-apps-dsp"; label = "sdsp"; qcom,non-secure-domain; + qcom,fastrpc-gids = <2908> #address-cells = <1>; #size-cells = <0>;
Add "qcom,fastrpc-gids" property to the list of optional properties. This property contains the list of privileged group IDs which is used to offload process to remote subsystem with increased privileges. Signed-off-by: Ekansh Gupta <quic_ekangupt@quicinc.com> --- Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml | 6 ++++++ 1 file changed, 6 insertions(+)