opensbi.git/lib/sbi/Kconfig, branch master

lib: sbi: Make per-HART stack size configurable via Kconfig

2026-06-16T13:51:11Z

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 Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/VI0P192MB3062735A6194BB6DA72083499E002@VI0P192MB3062.EURP192.PROD.OUTLOOK.COM Signed-off-by: Anup Patel

lib: sbi: Apply budget restriction when polling Zkr CSR state transition

2026-06-12T13:29:16Z

Zkr architecture doesn't define a time limit on state transitions which results in hanging on unresponsive or event-driven platforms. To prevent this, we need to limit polling iterations and fall back in case the budget is over, and stack guard keeps its initial value. The budget is configurable with CONFIG_ZKR_POLL_BUDGET, defaulting to 1000 iterations. Successful reads do not consume a try. Signed-off-by: Evgeny Voevodin Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20260519225014.244672-1-evvoevod@tenstorrent.com Signed-off-by: Anup Patel

lib: sbi: Implement SBI MPXY extension

2024-12-06T03:56:52Z

Implement the SBI MPXY extension which provides an SBI interface to the supervisor software for send messages via MPXY framework. Signed-off-by: Rahul Pathak Co-developed-by: Anup Patel Signed-off-by: Anup Patel

lib: sbi: Introduce an early console buffer for caching early prints

2024-07-24T06:48:41Z

The console device is registered by platform only in early_init() callback so any prints before this point will be lost. Introduce an early console buffer for caching prints before platform early_init(). For crashes before platform early_init(), users can simply dump the contents of the console_early_buffer[] string using a debugger. The relative address of the console_early_buffer[] string can be found using following two commands: CONSOLE_EARLY_FIFO_ADDR=`${CROSS_COMPILE}objdump -D \ build/platform/generic/firmware/fw_dynamic.elf | \ grep ":" | awk '{print $1}'` ${CROSS_COMPILE}objdump -R build/platform/generic/firmware/fw_dynamic.elf | \ grep $CONSOLE_EARLY_FIFO_ADDR | awk '{print $3}' Signed-off-by: Anup Patel Reviewed-By: Himanshu Chauhan

lib: sbi: implement SBI FWFT extension

2024-06-19T12:45:28Z

The SBI FWFT extension defines a set of function that can be called to control the configuration of some platform features (misaligned trap delegation, etc). This patch implements sbi_fwft_set() and sbi_fwft_get() as defined in the specification [1]. Link: https://lists.riscv.org/g/tech-prs/message/924 [1] Signed-off-by: Clément Léger Reviewed-by: Anup Patel

lib: sbi: Implement SBI SSE extension

2024-04-05T10:19:02Z

The SBI SSE extension defines a set of function that can be called to register and handle supervisor sofwtare events. This patch implements all of the functionality defined in the specification. Signed-off-by: Clément Léger Reviewed-by: Himanshu Chauhan Reviewed-by: Anup Patel

lib: Add SBIUnit testing macros and functions

2024-03-10T04:35:28Z

This patch introduces all of the SBIUnit macros and functions which can be used during the test development process. Also, it defines the 'run_all_tests' function, which is being called during the 'init_coldboot' right after printing the boot hart information. Also, add the CONFIG_SBIUNIT Kconfig entry in order to be able to turn the tests on and off. When the CONFIG_SBIUNIT is disabled, the tests and all related code is excluded completely on the compilation stage. Signed-off-by: Ivan Orlov Reviewed-by: Andrew Jones

lib: sbi: Implement SBI debug trigger extension

2024-01-10T05:25:50Z

This patch adds functions to register ecalls for debug triggers and handler to handle the debug trigger function IDs. Signed-off-by: Himanshu Chauhan Reviewed-by: Anup Patel

lib: sbi: Implement SBI CPPC extension

2023-04-07T04:06:01Z

Implement SBI CPPC extension. This extension is only available when OpenSBI platform provides a CPPC device to generic library. Signed-off-by: Sunil V L Reviewed-by: Andrew Jones Reviewed-by: Anup Patel

lib: sbi: Add system suspend skeleton

2023-02-27T14:13:52Z

Add the SUSP extension probe and ecall support, but for now the system suspend function is just a stub. Signed-off-by: Andrew Jones Reviewed-by: Anup Patel