diff options
| author | Bjorn Andersson <bjorn.andersson@linaro.org> | 2020-10-19 11:23:23 -0700 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-10-29 18:12:10 +0000 |
| commit | f9081b8ff5934b8d69c748d0200e844cadd2c667 (patch) | |
| tree | f0250279c0f22c7fd43c6ea7e470e717068a026a /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | 07a7f2caaa5a2619934491bab3c47b261c554fb0 (diff) | |
iommu/arm-smmu-qcom: Implement S2CR quirk
The firmware found in some Qualcomm platforms intercepts writes to S2CR
in order to replace bypass type streams with fault; and ignore S2CR
updates of type fault.
Detect this behavior and implement a custom write_s2cr function in order
to trick the firmware into supporting bypass streams by the means of
configuring the stream for translation using a reserved and disabled
context bank.
Also circumvent the problem of configuring faulting streams by
configuring the stream as bypass.
Cc: <stable@vger.kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Tested-by: Steev Klimaszewski <steev@kali.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20201019182323.3162386-4-bjorn.andersson@linaro.org
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions