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| author | Oriol Catalan <oriol.catalan@openchip.com> | 2026-06-16 19:09:33 +0530 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2026-06-16 19:21:11 +0530 |
| commit | d936372eab7f2cdd93d21f67d2381914589d9dd9 (patch) | |
| tree | ee818a76eb447770eca1bf249370fed1e43011bf | |
| parent | 56c39d1f08cb7aa1132e115b7850715c63212d57 (diff) | |
| download | opensbi-d936372eab7f2cdd93d21f67d2381914589d9dd9.tar.gz opensbi-d936372eab7f2cdd93d21f67d2381914589d9dd9.zip | |
lib: sbi: Make per-HART stack size configurable via Kconfig
The per-HART stack size for exception/interrupt handling is currently
hardcoded to 8192 bytes in SBI_PLATFORM_DEFAULT_HART_STACK_SIZE. This
may not be sufficient for platforms with deeper call stacks (e.g. those
enabling additional SBI extensions) or may be wasteful for minimal
platforms.
Introduce a HART_STACK_SIZE Kconfig option in lib/sbi/Kconfig with a
valid range of 8192 to 1048576 bytes and a default of 8192 bytes to
preserve existing behavior. The SBI_PLATFORM_DEFAULT_HART_STACK_SIZE
macro now resolves to CONFIG_HART_STACK_SIZE, allowing all platforms
to benefit from a single configuration knob without any source changes.
Signed-off-by: Oriol Catalan <oriol.catalan@openchip.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/VI0P192MB3062735A6194BB6DA72083499E002@VI0P192MB3062.EURP192.PROD.OUTLOOK.COM
Signed-off-by: Anup Patel <anup@brainfault.org>
| -rw-r--r-- | include/sbi/sbi_platform.h | 2 | ||||
| -rw-r--r-- | lib/sbi/Kconfig | 5 |
2 files changed, 6 insertions, 1 deletions
diff --git a/include/sbi/sbi_platform.h b/include/sbi/sbi_platform.h index 5cbc1bc3..1e9a23c1 100644 --- a/include/sbi/sbi_platform.h +++ b/include/sbi/sbi_platform.h @@ -164,7 +164,7 @@ struct sbi_platform_operations { }; /** Platform default per-HART stack size for exception/interrupt handling */ -#define SBI_PLATFORM_DEFAULT_HART_STACK_SIZE 8192 +#define SBI_PLATFORM_DEFAULT_HART_STACK_SIZE CONFIG_DEFAULT_HART_STACK_SIZE /** Platform default heap size */ #define SBI_PLATFORM_DEFAULT_HEAP_SIZE(__num_hart) \ diff --git a/lib/sbi/Kconfig b/lib/sbi/Kconfig index 89245a25..e76aecca 100644 --- a/lib/sbi/Kconfig +++ b/lib/sbi/Kconfig @@ -2,6 +2,11 @@ menu "Generic SBI Support" +config DEFAULT_HART_STACK_SIZE + int "Default per-HART stack size (bytes)" + range 8192 1048576 + default 8192 + config CONSOLE_EARLY_BUFFER_SIZE int "Early console buffer size (bytes)" default 256 |