diff options
| author | Athira Rajeev <atrajeev@linux.vnet.ibm.com> | 2021-05-25 09:51:43 -0400 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-06-17 00:09:11 +1000 |
| commit | d81090ed44c0d15abf2b07663d5f0b9e5ba51525 (patch) | |
| tree | 8119f2165e397588cb71d9ee6de697b3f79febb2 /arch/powerpc/kernel/stacktrace.c | |
| parent | 45677c9aebe926192e59475b35a1ff35ff2d4217 (diff) | |
selftests/powerpc: EBB selftest for MMCR0 control for PMU SPRs in ISA v3.1
With the MMCR0 control bit (PMCCEXT) in ISA v3.1, read access to
group B registers is restricted when MMCR0 PMCC=0b00. In other
platforms (like power9), the older behaviour works where group B
PMU SPRs are readable.
Patch creates a selftest which verifies that the test takes a
SIGILL when attempting to read PMU registers via helper function
"dump_ebb_state" for ISA v3.1.
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Tested-by: Nageswara R Sastry <rnsastry@linux.ibm.com <mailto:rnsastry@linux.ibm.com>>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1621950703-1532-3-git-send-email-atrajeev@linux.vnet.ibm.com
Diffstat (limited to 'arch/powerpc/kernel/stacktrace.c')
0 files changed, 0 insertions, 0 deletions