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lib: sbi_domain: Introduce domain intialization order

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Currently, the domain initialization order is implied by the order
in which domains are populated by sbi_platform_domains_init() from
sbi_domain_finalize(). This is not documented anywhere and forces
unecessary ordering between domain DT nodes.

To address the above, introduce per-domain 32-bit integer to represent
intialization order (aka "init_order") where domain with a lower
initialization order will be booted first and two domains must not
have same initialization order. For DT based domain creation, new
"init-order" DT property can be used in domain DT node to specify
the initialization order. The ROOT domain is assumed to have lowest
initialization order (aka 0xffffffff).

Signed-off-by: Anup Patel <anup.patel@oss.qualcomm.com>
Reviewed-by: Pawandeep Oza <pawandeep.oza@oss.qualcomm.com>
Tested-by: Pawandeep Oza <pawandeep.oza@oss.qualcomm.com>
Reviewed-by: Yu-Chien Peter Lin <peter.lin@sifive.com>
Link: https://lore.kernel.org/r/20260905131748.922920-4-anup.patel@oss.qualcomm.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Anup Patel
2026-09-16 09:21:21 +05:30
committed by Anup Patel
parent 71faf5a307
commit 55b6b73435
5 changed files with 41 additions and 15 deletions
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lib/utils/fdt/fdt_domain.c
+8
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@@ -330,6 +330,14 @@ static int __fdt_parse_domain(const void *fdt, int domain_offset, void *opaque)
sizeof(dom->name));
dom->name[sizeof(dom->name) - 1] = '\0';
/* Read initalization order */
val = fdt_getprop(fdt, domain_offset, "init-order", &len);
len = len / sizeof(u32);
if (val && len)
dom->init_order = fdt32_to_cpu(val[0]);
else
dom->init_order = (u32)domain_offset;
/* Setup possible HARTs mask */
SBI_HARTMASK_INIT(mask);
dom->possible_harts = mask;