From: Sumit Gupta <sumitg@nvidia.com>
To: <krzysztof.kozlowski@linaro.org>, <robh@kernel.org>,
<conor+dt@kernel.org>, <maz@kernel.org>, <mark.rutland@arm.com>,
<treding@nvidia.com>, <jonathanh@nvidia.com>
Cc: <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linux-tegra@vger.kernel.org>, <amhetre@nvidia.com>,
<bbasu@nvidia.com>, <sumitg@nvidia.com>
Subject: [Patch v2 0/2] memory: tegra: Skip restricted register access from Guest
Date: Tue, 2 Apr 2024 18:56:24 +0530 [thread overview]
Message-ID: <20240402132626.24693-1-sumitg@nvidia.com> (raw)
MC SID and Broadbast channel register access is restricted for Guest VM.
But the Tegra MC driver is considering both these regions as mandatory
and causes error on access. Change that to consider both the regions as
optional in SoC's from Tegra186 onwards. Then skip access to the
restricted registers from Guest if its region is not present in Guest DT
and hence not mapped.
Previously, the solution in [1] was not accepted. Now, handled the
problem with this alternate solution.
---
v1[1] -> v2:
- consider broadcast channel registers also as restricted along with sid.
- make sid and broadcast regions optional and access if present in dt.
- update the yaml file.
Sumit Gupta (2):
dt-bindings: make sid and broadcast reg optional
memory: tegra: make sid and broadcast regions optional
.../nvidia,tegra186-mc.yaml | 18 +++++++--------
drivers/memory/tegra/mc.c | 9 +++++++-
drivers/memory/tegra/mc.h | 18 +++++++--------
drivers/memory/tegra/tegra186.c | 22 ++++++++++---------
4 files changed, 38 insertions(+), 29 deletions(-)
[1] https://lore.kernel.org/lkml/20240206114852.8472-1-sumitg@nvidia.com/
--
2.17.1
next reply other threads:[~2024-04-02 13:26 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-02 13:26 Sumit Gupta [this message]
2024-04-02 13:26 ` [Patch v2 1/2] dt-bindings: make sid and broadcast reg optional Sumit Gupta
2024-04-02 14:40 ` Rob Herring
2024-04-02 19:15 ` Jon Hunter
2024-04-03 6:56 ` Krzysztof Kozlowski
2024-04-03 14:39 ` Sumit Gupta
2024-04-02 13:26 ` [Patch v2 2/2] memory: tegra: make sid and broadcast regions optional Sumit Gupta
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