opensbi.git/include/sbi/sbi_init.h, branch master

lib: sbi: Revert entry_count before doing hsm stop in hsm wait loop

2025-06-16T04:10:28Z

Using hsm stop in hsm wait loop causes secondary harts to be stuck forever in OpenSBI on RISC-V platforms where HSM hart hotplug is available and all harts come-up at the same time during system power-on. For example, lets say we have two harts A and B on a RISC-V platform with HSM hart hotplug which come-up at the same time during system power-on. The hart A enters OpenSBI before hart B hence it becomes the primary (or cold-boot) hart whereas hart B becomes the secondary (or warm-boot) hart. The hart A follows the OpenSBI cold-boot path and registers hsm device before hart B enters OpenSBI. The hart B eventually enters OpenSBI and follows the OpenSBI warm-boot path so it will increment it's own entry_count before entering hsm wait loop where it sees hsm device and stops itself. Later as part of the Linux boot-up sequence, hart A issues SBI HSM start call to bring-up hart B but OpenSBI sees entry_count != init_count for hart B in sbi_hsm_hart_start() hence hsm_device_hart_start() is not called for hart B resulting in hart B stuck forever in OpenSBI. To fix the above issue, revert entry_count before doing hsm stop in hsm wait loop. Fixes: d844deadec94 ("lib: sbi: Use hsm stop for hsm wait") Signed-off-by: Anup Patel Reviewed-by: Nick Hu Link: https://lore.kernel.org/r/20250527124821.2113467-1-apatel@ventanamicro.com Signed-off-by: Anup Patel

lib: sbi: Update sbi_{entry,init}_count() to take a hart index

2024-09-26T10:59:27Z

All callers already have the hartindex available, so this removes a hartid to hartindex conversion. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

lib: sbi: Introduce sbi_entry_count() function

2023-04-06T13:18:15Z

We introduce sbi_entry_count() function which counts the number of times a HART enters OpenSBI via cold-boot or warm-boot path. Signed-off-by: Anup Patel

lib: Add sbi_init_count() API

2020-01-07T06:41:48Z

We add sbi_init_count() API which provides number of times a given HART completed init sequence (warmboot/coldboot). This will be very useful in debugging. With upcoming SBI HSM extension, it will also help in implementing one-time init code for each HART. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: Add initial sbi_exit() API

2020-01-07T06:40:35Z

This patch adds initial implementation of sbi_exit() API which can be used to perform OpenSBI exit sequence for current HART. The sbi_exit() implementation will be further extended by subsequent patches. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

all: Update copyright header in all files

2019-01-24T08:37:47Z

This patch updates copyright header in all files as follows: 1. Makes "SPDX-License-Identifier: BSD-2-Clause" as first line 2. Change copyright year to 2019 for Western Digital Signed-off-by: Anup Patel

lib: Add documentation for sbi_init() API

2019-01-16T05:55:25Z

This patch adds doxygen style documentation for sbi_init() API. Signed-off-by: Anup Patel

Initial commit.

2018-12-11T13:54:06Z

Signed-off-by: Anup Patel