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Add selftests for /dev/papr-vpd, exercising the common expected use cases: * Retrieve all VPD by passing an empty location code. * Retrieve the "system VPD" by passing a location code derived from DT root node properties, as done by the vpdupdate command. The tests also verify that certain intended properties of the driver hold: * Passing an unterminated location code to PAPR_VPD_CREATE_HANDLE gets EINVAL. * Passing a NULL location code pointer to PAPR_VPD_CREATE_HANDLE gets EFAULT. * Closing the device node without first issuing a PAPR_VPD_CREATE_HANDLE command to it succeeds. * Releasing a handle without first consuming any data from it succeeds. * Re-reading the contents of a handle returns the same data as the first time. Some minimal validation of the returned data is performed. The tests are skipped on systems where the papr-vpd driver does not initialize, making this useful only on PowerVM LPARs at this point. Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20231212-papr-sys_rtas-vs-lockdown-v6-12-e9eafd0c8c6c@linux.ibm.com
2 lines
10 B
Plaintext
2 lines
10 B
Plaintext
/papr_vpd
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