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x86: x86-64: add arch_float_en-/dis-able() functions

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This adds arch_float_enable() and arch_float_disable() to x86-64.
As x86-64 always has FP/SSE enabled, these operations are basically
no-ops. These are added just for the completeness of arch interface.

Fixes #38022

Signed-off-by: Daniel Leung <daniel.leung@intel.com>
This commit is contained in:
Daniel Leung 2021-08-31 10:46:01 -07:00 • committed by Christopher Friedt
commit d33017b458
1 changed files with 12 additions and 0 deletions
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12
arch/x86/core/intel64/thread.c
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@ -61,3 +61,15 @@ void arch_new_thread(struct k_thread *thread, k_thread_stack_t *stack,
thread->arch.flags = X86_THREAD_FLAG_ALL;
thread->switch_handle = thread;
}
int arch_float_disable(struct k_thread *thread)
{
/* x86-64 always has FP/SSE enabled so cannot be disabled */
return -ENOTSUP;
}
int arch_float_enable(struct k_thread *thread, unsigned int options)
{
/* x86-64 always has FP/SSE enabled so nothing to do here */
return 0;
}