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Increase ACE OpenSBI hart stack size to 16 KiB #146

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Merged
wojciechozga merged 1 commit into from
Nov 5, 2026
Merged

Increase ACE OpenSBI hart stack size to 16 KiB #146

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9 changes: 8 additions & 1 deletion security-monitor/platform/generic/platform.c
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Original file line number Diff line number Diff line change
Expand Up @@ -380,6 +380,13 @@ const struct sbi_platform_operations platform_ops = {
.vendor_ext_provider = generic_vendor_ext_provider,
};

/*
* OpenSBI reserves 4 KiB of each hart stack region for scratch data.
* ACE requires additional stack space during security monitor initialization.
* A 16 KiB region provides 12 KiB of usable stack.
*/
#define ACE_OPENSBI_HART_STACK_SIZE (16 * 1024)

struct sbi_platform platform = {
.opensbi_version = OPENSBI_VERSION,
.platform_version =
Expand All @@ -389,7 +396,7 @@ struct sbi_platform platform = {
.features = SBI_PLATFORM_DEFAULT_FEATURES,
.hart_count = SBI_HARTMASK_MAX_BITS,
.hart_index2id = generic_hart_index2id,
.hart_stack_size = SBI_PLATFORM_DEFAULT_HART_STACK_SIZE,
.hart_stack_size = ACE_OPENSBI_HART_STACK_SIZE,
.heap_size = SBI_PLATFORM_DEFAULT_HEAP_SIZE(0),
.platform_ops_addr = (unsigned long)&platform_ops
};
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