From: Amit Pundir amit.pundir@linaro.org

mainline inclusion from mainline-v6.6-rc1 commit 110e70fccce4f22b53986ae797d665ffb1950aa6 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I95ATF CVE: CVE-2023-52561

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...

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[ Upstream commit 110e70fccce4f22b53986ae797d665ffb1950aa6 ]

Adding a reserved memory region for the framebuffer memory (the splash memory region set up by the bootloader).

It fixes a kernel panic (arm-smmu: Unhandled context fault at this particular memory region) reported on DB845c running v5.10.y.

Cc: stable@vger.kernel.org # v5.10+ Reviewed-by: Caleb Connolly caleb.connolly@linaro.org Signed-off-by: Amit Pundir amit.pundir@linaro.org Acked-by: Krzysztof Kozlowski krzysztof.kozlowski@linaro.org Link: https://lore.kernel.org/r/20230726132719.2117369-2-amit.pundir@linaro.org Signed-off-by: Bjorn Andersson andersson@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Guo Mengqi guomengqi3@huawei.com --- arch/arm64/boot/dts/qcom/sdm845-db845c.dts | 9 +++++++++ 1 file changed, 9 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-db845c.dts b/arch/arm64/boot/dts/qcom/sdm845-db845c.dts index 1e889ca932e4..67cd869de352 100644 --- a/arch/arm64/boot/dts/qcom/sdm845-db845c.dts +++ b/arch/arm64/boot/dts/qcom/sdm845-db845c.dts @@ -85,6 +85,14 @@ }; };

+ reserved-memory { + /* Cont splash region set up by the bootloader */ + cont_splash_mem: framebuffer@9d400000 { + reg = <0x0 0x9d400000 0x0 0x2400000>; + no-map; + }; + }; + lt9611_1v8: lt9611-vdd18-regulator { compatible = "regulator-fixed"; regulator-name = "LT9611_1V8"; @@ -482,6 +490,7 @@ };

&mdss { + memory-region = <&cont_splash_mem>; status = "okay"; };