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riscv: implements arch_thread_priv_stack_space_get

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This implements arch_thread_priv_stack_space_get() so this can
be used to figure out how much privileged stack space is used.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>
This commit is contained in:
Daniel Leung 2024-07-31 12:57:24 -07:00 committed by Anas Nashif
parent bb313355f3
commit 0962114f2b
2 changed files with 13 additions and 0 deletions
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1
arch/Kconfig
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@ -121,6 +121,7 @@ config RISCV
select SCHED_IPI_SUPPORTED if SMP
select ARCH_HAS_DIRECTED_IPIS
select BARRIER_OPERATIONS_BUILTIN
select ARCH_HAS_THREAD_PRIV_STACK_SPACE_GET if USERSPACE
imply XIP
help
RISCV architecture

12
arch/riscv/core/thread.c
View file

@ -195,6 +195,18 @@ FUNC_NORETURN void arch_user_mode_enter(k_thread_entry_t user_entry,
CODE_UNREACHABLE;
}
int arch_thread_priv_stack_space_get(const struct k_thread *thread, size_t *stack_size,
size_t *unused_ptr)
{
if ((thread->base.user_options & K_USER) != K_USER) {
return -EINVAL;
}
*stack_size = Z_STACK_PTR_ALIGN(K_KERNEL_STACK_RESERVED + CONFIG_PRIVILEGED_STACK_SIZE);
return z_stack_space_get((void *)thread->arch.priv_stack_start, *stack_size, unused_ptr);
}
#endif /* CONFIG_USERSPACE */
#ifndef CONFIG_MULTITHREADING