2023-10-08 03:36:49

by Sam Protsenko

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

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 <[email protected]>
---
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

2023-10-12 20:03:19

by Krzysztof Kozlowski

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

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 <[email protected]>

2023-10-12 20:03:43

by Krzysztof Kozlowski

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

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