[PATCH] arm64: dts: exynos: Add reserved memory for pstore on E850-96

[PATCH] arm64: dts: exynos: Add reserved memory for pstore on E850-96

[Sam Protsenko]

Reserve a 2 MiB memory region to record kmsg dumps, console, ftrace and
userspace messages. The implemented memory split allows capturing and
reading corresponding ring buffers:
  * dmesg: 6 dumps, 128 KiB each
  * console: 128 KiB
  * ftrace: 128 KiB for each of 8 CPUs (1 MiB total)
  * userspace messages: 128 KiB

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
---
 arch/arm64/boot/dts/exynos/exynos850-e850-96.dts | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts b/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
index 8d733361ef82..d54c8fa55c09 100644
--- a/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
+++ b/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
@@ -59,6 +59,21 @@ memory@80000000 {
 		      <0x8 0x80000000 0x80000000>;
 	};
 
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <1>;
+		ranges;
+
+		ramoops@f0000000 {
+			compatible = "ramoops";
+			reg = <0x0 0xf0000000 0x200000>;
+			record-size = <0x20000>;
+			console-size = <0x20000>;
+			ftrace-size = <0x100000>;
+			pmsg-size = <0x20000>;
+		};
+	};
+
 	gpio-keys {
 		compatible = "gpio-keys";
 		pinctrl-names = "default";
-- 
2.39.2

Re: [PATCH] arm64: dts: exynos: Add reserved memory for pstore on E850-96

[Krzysztof Kozlowski]

On Sat, 07 Oct 2023 22:36:33 -0500, Sam Protsenko wrote:
> Reserve a 2 MiB memory region to record kmsg dumps, console, ftrace and
> userspace messages. The implemented memory split allows capturing and
> reading corresponding ring buffers:
>   * dmesg: 6 dumps, 128 KiB each
>   * console: 128 KiB
>   * ftrace: 128 KiB for each of 8 CPUs (1 MiB total)
>   * userspace messages: 128 KiB
> 
> [...]

Applied, thanks!

[1/1] arm64: dts: exynos: Add reserved memory for pstore on E850-96
      https://git.kernel.org/krzk/linux/c/23e4a49943624dd83199989c852565a3ff760fa7

Best regards,
-- 
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Re: [PATCH] arm64: dts: exynos: Add reserved memory for pstore on E850-96

[Krzysztof Kozlowski]

On 12/10/2023 22:02, Krzysztof Kozlowski wrote:
> 
> On Sat, 07 Oct 2023 22:36:33 -0500, Sam Protsenko wrote:
>> Reserve a 2 MiB memory region to record kmsg dumps, console, ftrace and
>> userspace messages. The implemented memory split allows capturing and
>> reading corresponding ring buffers:
>>   * dmesg: 6 dumps, 128 KiB each
>>   * console: 128 KiB
>>   * ftrace: 128 KiB for each of 8 CPUs (1 MiB total)
>>   * userspace messages: 128 KiB
>>
>> [...]
> 
> Applied, thanks!
> 
> [1/1] arm64: dts: exynos: Add reserved memory for pstore on E850-96
>       https://git.kernel.org/krzk/linux/c/23e4a49943624dd83199989c852565a3ff760fa7

Thanks, applied.
It is however very late in the cycle, so there is a chance this will
miss the merge window. If this happens, I will keep it for the next
cycle (no need for resending).

Best regards,
Krzysztof