opensbi.git/lib/utils/fdt/fdt_domain.c, branch master

lib: utils: fdt_domain: add root-regions-inheritance policy

2026-05-18T12:50:50Z

Introduce root-regions-inheritance DT property to control copying of root domain memregions. Support 'all' and 'm-only' modes, always inheriting firmware and M-only regions; behavior matches m-only policy when property is absent. Signed-off-by: Yu-Chien Peter Lin Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20260516072906.1427203-1-peter.lin@sifive.com Signed-off-by: Anup Patel

lib: fdt_domain: Default boot-hart to coldboot HART for multi-domain boot

2026-05-11T04:41:06Z

When "boot-hart" is not specified, dom->boot_hartid was left as -1U, causing domain context switching to fail. Default it to the coldboot HART to enable SMP boot in multi-domain setups, consistent with how next-arg1 is handled. Also update its description in domain_support.md. Signed-off-by: Yu-Chien Peter Lin Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20260327054936.3462935-1-peter.lin@sifive.com Signed-off-by: Anup Patel

lib: utils:Check that hartid is valid

2025-02-12T03:54:09Z

It is possible that hartid may not be sequential and it should not be validated against SBI_HARTMASK_MAX_BITS. Instead we should check the index of the hartid, hart index, against SBI_HARTMASK_MAX_BITS. Signed-off-by: Raj Vishwanathan Reviewed-by: Anup Patel

lib: utils: Make the enforce permission bit configurable from DT

2025-02-11T12:26:48Z

The domain_support.md documentation states that the enforce permission bit (BIT[6]) could be set in the "regions" property of a domain instance DT node. However, this bit is masked in the current implementation. This patch unmasks the bit to make it configurable from DT. Signed-off-by: Chao Du Reviewed-by: Xiang W Reviewed-by: Anup Patel

lib: utils/fdt: Use sbi_domain_memregion_init() when parsing domains

2024-10-25T17:30:02Z

Use sbi_domain_memregion_init() at the time of parsing domains from FDT so that sbi_domain_memregion_init() is always used for setting up all memregions. Signed-off-by: Anup Patel Reviewed-by: Samuel Holland

lib: utils: fdt_domain: Make opensbi-domain optional in CPU node

2024-08-24T08:38:00Z

The domain_support.md documentation states that "the HART to domain instance assignment can be parsed from the device tree using *optional* DT property opensbi-domain in each CPU DT node". However, the current implementation does not treat this parameter as optional when determining which HARTs to assign to a freshly discovered domain from the device tree, causing an effect where every HART in the system must be explicitly assigned to a domain only if a domain is specified in the device tree. Instead, this patch simply ignores CPUs that do not specify a domain, and does not attempt to assign them into the recently discovered domain. Signed-off-by: Gregor Haas Reviewed-by: Anup Patel

lib: utils/fdt: Constify FDT parsing functions

2024-08-24T07:32:25Z

Distinguish between functions which modify the devicetree and those which only extract information from it. Other than the iterators in fdt_domain.c, this is a mechanical conversion. Signed-off-by: Samuel Holland Reviewed-by: Andrew Jones Reviewed-by: Anup Patel

lib: utils: fdt_domain: Use consistent device-tree address when next-arg1 is missing

2024-08-23T08:47:29Z

The diagram shown below illustrates the boot-flow involving OP-TEE OS initialization. (1)-----------+ | U-Boot SPL | +------------+ | v (2)-------------------------------------------------------------+ | OpenSBI (fw_dynamic) | | (4)------------------------+ | | | optee dispatcher driver | | +-----------------+-------^---------|-------+------------------+ M-mode | | | ---------+--[trusted domain]---+----.----+--[untrusted domain]------- S-mode | (coldboot domain) | | | v | | v (3)---------------------------+ |(5)----------------------------+ | OP-TEE OS | | | U-Boot | +----------------------------+ | +-----------------------------+ | | | v |(6)----------------------------+ | | Linux | | +-----------------------------+ As OP-TEE OS has device-tree node fixups that need to be passed through to the next boot stages, e.g. the reserved memory node: reserved-memory { #address-cells = <2>; #size-cells = <2>; ranges; optee_core@f1000000 { no-map; reg = <0x0 0xf1000000 // OP-TEE OS base address 0x0 0x01000000>; }; <...> }; Instead of using 0x0 as the default value, allow identical next-arg1 to be used by non-coldboot domain (i.e., untrusted domain) when the property is not provided. Also, update the description of next-arg1 property in the document. Signed-off-by: Yu Chien Peter Lin Reviewed-by: Alvin Chang Reviewed-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: utils/fdt: Use heap in FDT domain parsing

2023-06-05T10:29:35Z

Let's use heap allocation in FDT domain parsing instead of using a fixed size global array. Signed-off-by: Anup Patel Reviewed-by: Andrew Jones