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| author |   Russell Currey <ruscur@russell.cc> | 2020-11-17 16:59:11 +1100 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2020-11-19 23:47:12 +1100 |
| commit | fcb48454c23c5679d1a2e252f127642e91b05cbe (patch) | |
| tree | dce94d41fdb52ee4373e3017840f673957ed8c73 /arch/powerpc/lib/feature-fixups.c | |
| parent | Linux 5.10-rc2 (diff) | |
| download | linux-dev-fcb48454c23c5679d1a2e252f127642e91b05cbe.tar.xz linux-dev-fcb48454c23c5679d1a2e252f127642e91b05cbe.zip | |
selftests/powerpc: rfi_flush: disable entry flush if present
We are about to add an entry flush. The rfi (exit) flush test measures
the number of L1D flushes over a syscall with the RFI flush enabled and
disabled. But if the entry flush is also enabled, the effect of enabling
and disabling the RFI flush is masked.
If there is a debugfs entry for the entry flush, disable it during the RFI
flush and restore it later.
Reported-by: Spoorthy S <spoorts2@in.ibm.com>
Signed-off-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/lib/feature-fixups.c')
0 files changed, 0 insertions, 0 deletions