opensbi.git/lib/utils/ipi, branch master

lib: utils/ipi: mswi: add MIPS P8700 compatible

2025-11-05T16:07:37Z

The MSWI present in the MIPS P8700 is compliant with the ACLINT specification, so add a dedicated compatible string for it. Signed-off-by: Benoît Monin Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20251027-p8700-aclint-v2-1-f10cbfb66e92@bootlin.com Signed-off-by: Anup Patel

lib: utils/ipi: Convert IPI drivers as early drivers

2025-09-16T04:26:31Z

The fdt_ipi_init() is already called from generic_early_init() so let's convert IPI drivers as early drivers. Signed-off-by: Anup Patel Reviewed-by: Samuel Holland Tested-by: Nick Hu Link: https://lore.kernel.org/r/20250904052410.546818-4-apatel@ventanamicro.com Signed-off-by: Anup Patel

lib: sbi: Introduce IPI device rating

2025-09-16T04:26:31Z

A platform can have multiple IPI devices (such as ACLINT MSWI, AIA IMSIC, etc). Currently, OpenSBI rely on platform calling the sbi_ipi_set_device() function in correct order and prefer the first avaiable IPI device which is fragile. Instead of the above, introduce IPI device rating and prefer the highest rated IPI device. This further allows extending the sbi_ipi_raw_clear() to clear all available IPI devices. Signed-off-by: Anup Patel Tested-by: Nick Hu Link: https://lore.kernel.org/r/20250904052410.546818-2-apatel@ventanamicro.com Signed-off-by: Anup Patel

lib: utils/ipi: Use fdt_driver for initialization

2024-11-28T12:12:05Z

The ipi driver subsystem does not need any extra data, so it can use `struct fdt_driver` directly. The generic fdt_ipi_init() performs a best-effort initialization of all matching DT nodes. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

treewide: Make carray arrays const and NULL-terminated

2024-11-28T11:39:17Z

This allows the compiler to generate significantly better code, because it does not have to maintain either the loop counter or loop limit. Plus there are half as many symbols to relocate. This also simplifies passing carray arrays to helper functions. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

platform: Drop IPI warm init and exit hooks

2024-11-11T12:51:04Z

Now that the SBI IPI core clears IPIs at warm boot in a generic way, none of the drivers or platforms use these hooks, and we can remove them. Platforms need only to initialize the driver once during cold init. If other hooks are needed in the future, they can be added to struct sbi_ipi_device. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

lib: sbi_ipi: Move initial IPI clear to sbi_ipi_init()

2024-11-11T12:48:35Z

sbi_ipi_init() expects the platform warm init function to clear IPIs on the local hart, but there is already a generic function to do this. After this change, none of the existing drivers need a warm init callback. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

lib: sbi_ipi: Make .ipi_clear always target the current hart

2024-11-11T12:47:15Z

All existing users of this operation target the current hart, and it seems unlikely that a future user will need to clear the pending IPI status of a remote hart. Simplify the logic by changing .ipi_clear (and its wrapper sbi_ipi_raw_clear()) to always operate on the current hart. This incidentally fixes a bug introduced in commit 78c667b6fc07 ("lib: sbi: Prefer hartindex over hartid in IPI framework"), which changed the .ipi_clear parameter from a hartid to a hart index, but failed to update the warm_init functions to match. Fixes: 78c667b6fc07 ("lib: sbi: Prefer hartindex over hartid in IPI framework") Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

lib: utils/ipi: Use sbi_domain_root_add_memrange() for ACLINT mswi

2024-10-25T17:29:54Z

The sbi_domain_root_add_memrange() should be preferred for creating multiple memregions over a range. Update ACLINT mswi driver to use sbi_domain_root_add_memrange() instead of explicitly registering memregions. Signed-off-by: Anup Patel Reviewed-by: Samuel Holland

lib: utils/ipi: Fix hartid wrongly used as hart index

2024-09-27T05:12:24Z

Since commit 78c667b6fc07 ("lib: sbi: Prefer hartindex over hartid in IPI framework"), The .ipi_clear callback functions take a hart index, not a hartid. However, these warm_init functions were never updated. Fixes: 78c667b6fc07 ("lib: sbi: Prefer hartindex over hartid in IPI framework") Signed-off-by: Samuel Holland Reviewed-by: Anup Patel