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arm/lib: Specify the FVP environment variables explicitly

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It is sometimes useful to be able to configure the behavior of FVPs
using environment variables, e.g. for licensing or plugins.

Add a new FVP option: FVP_ENV_PASSTHROUGH, which allows the Bitbake
variables to be passed to the environment to be specified explicitly (in
a similar way to BB_ENV_PASSTHROUGH). This ensures that:

 * FVPs launched via runfvp have a reproducable environment
 * FVPs launched via testimage (which run from an isolated Bitbake task)
   can receive environment variables

Change the self-tests to use cwd instead of PATH to find the mock FVPs,
as the PATH environment variable is no longer passed through.

Issue-Id: SCM-4964
Signed-off-by: Peter Hoyes <Peter.Hoyes@arm.com>
Change-Id: Idf6ac6d41fda4cd5f950bc383c2fc1fa1acdf4e3
Signed-off-by: Jon Mason <jon.mason@arm.com>
This commit is contained in:
Peter Hoyes
2022-09-13 13:08:50 +01:00
committed by Jon Mason
parent 7c3e597b4c
commit 820a55d348
8 changed files with 28 additions and 7 deletions
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8
documentation/runfvp.md
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@@ -116,6 +116,14 @@ Arbitrary extra arguments that are passed directly to the FVP. For example:
FVP_EXTRA_ARGS = "--simlimit 60"
```
### `FVP_ENV_PASSTHROUGH`
The FVP is launched with an isolated set of environment variables. Add the name of a Bitbake variable to this list to pass it through to the FVP environment. For example:
```
FVP_ENV_PASSTHROUGH = "ARMLMD_LICENSE_FILE FM_TRACE_PLUGINS"
```
[AEM]: https://developer.arm.com/tools-and-software/simulation-models/fixed-virtual-platforms/arm-ecosystem-models
[FVP]: https://developer.arm.com/tools-and-software/simulation-models/fixed-virtual-platforms