opensbi.git/lib/sbi/sbi_system.c, branch master

lib: sbi: Add system_resume callback for restoring the system

2025-10-28T05:58:09Z

The last core who performs the system suspend is responsible for restoring the system after waking up. Add the system_resume callback for restoring the system from suspend. Suggested-by: Anup Patel Signed-off-by: Nick Hu Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20251020-cache-upstream-v7-11-69a132447d8a@sifive.com Signed-off-by: Anup Patel

lib: sbi: factorize previous mode computation

2024-10-25T18:23:18Z

Previous privilege mode retrieval from mstatus is done at different places, factorize it rather than copy/pasting it again. Signed-off-by: Clément Léger Reviewed-by: Samuel Holland

lib: sbi: Update __sbi_hsm_hart_get_state() to take a hart index

2024-09-26T06:00:04Z

This removes some hartindex conversions in sbi_system_suspend(), but is mostly intended to support refactoring sbi_hsm_hart_interruptible_mask() to work exclusively with struct sbi_hartmask. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

lib: sbi: Simplify halt broadcast logic

2024-09-26T05:46:53Z

Use the IPI .update callback to exclude the local hart. This allows reusing the normal logic for broadcasting an IPI to all active harts. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

sbi: sbi_domain_context: Add spinlock for updating domain assigned_harts

2024-05-07T14:41:30Z

Add spinlock protection to avoid race condition on assigned_harts during domain context switching. Also, rename/add variables for accessing the corresponding domain of target/current context. Signed-off-by: Alvin Chang Reviewed-by: Yu Chien Peter Lin Reviewed-by: Anup Patel

lib: sbi: Fix shift bug in sbi_system_reset

2023-12-26T15:58:34Z

There is a problem with judging whether the current hart belongs to hmask. If cur_hartid minus hbase is greater than BITS_PER_LONG, the previous hmask will also have a bit cleared incorrectly, which will cause some harts to lose ipi. Signed-off-by: Xiang W Reviewed-by: Anup Patel

include: sbi: Remove sbi_hartmask_for_each_hart() macro

2023-09-24T06:18:21Z

The sbi_hartmask_for_each_hart() macro is slow and has only one user so let us completely remove the sbi_hartmask_for_each_hart() macro. Signed-off-by: Anup Patel

lib: sbi: Extend sbi_hartmask to support both hartid and hartindex

2023-09-24T06:09:32Z

Currently, the sbi_hartmask is indexed by hartid which puts a limit on hartid to be less than SBI_HARTMASK_MAX_BITS. We extend the sbi_hartmask implementation to use hartindex and support updating sbi_hartmask using hartid. This removes the limit on hartid and existing code works largely unmodified. Signed-off-by: Xiang W Signed-off-by: Anup Patel

lib: sbi: Update system suspend to spec

2023-07-31T06:15:11Z

commit 68e66106120f ("SUSP: Add SBI_ERR_DENIED") of the SBI spec adds a new error code, SBI_ERR_DENIED, which is returned when entry criteria has not be meant. Update the system suspend implementation to return this error when it has detected that not all harts are in the STOPPED state. Signed-off-by: Andrew Jones Reviewed-by: Anup Patel

lib: sbi: Align system suspend errors with spec

2023-06-04T09:48:40Z

The spec says sbi_system_suspend() will return SBI_ERR_INVALID_PARAM when "sleep_type is reserved or is platform-specific and unimplemented" and SBI_ERR_NOT_SUPPORTED when sleep_type "is not reserved and is implemented, but the platform does not support it due to one or more missing dependencies." Ensure SBI_ERR_INVALID_PARAM is returned for reserved sleep types and that the system suspend driver can choose which of the two error types to return itself by returning an error from its check function rather than a boolean. Signed-off-by: Andrew Jones Reviewed-by: Anup Patel