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fork: fpregs: return error code.

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Change-Id: I6ff150a39cd8952adad9b21d0c9f8514126ef957
This commit is contained in:
TOIDA,Suguru
2019-08-20 12:15:45 +09:00
committed by Masamichi Takagi
parent de0e07f29e
commit 58f4593478
5 changed files with 56 additions and 30 deletions
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38
arch/arm64/kernel/cpu.c
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@ -1,4 +1,4 @@
/* cpu.c COPYRIGHT FUJITSU LIMITED 2015-2018 */
/* cpu.c COPYRIGHT FUJITSU LIMITED 2015-2019 */
#include <ihk/cpu.h>
#include <ihk/mm.h>
#include <types.h>
@ -1240,7 +1240,6 @@ err:
}
static int check_and_allocate_fp_regs(struct thread *thread);
void save_fp_regs(struct thread *thread);
void arch_clone_thread(struct thread *othread, unsigned long pc,
unsigned long sp, struct thread *nthread)
@ -1481,8 +1480,7 @@ check_and_allocate_fp_regs(struct thread *thread)
if (!thread->fp_regs) {
kprintf("error: allocating fp_regs pages\n");
result = 1;
panic("panic: error allocating fp_regs pages");
result = -ENOMEM;
goto out;
}
@ -1491,37 +1489,51 @@ check_and_allocate_fp_regs(struct thread *thread)
#ifdef CONFIG_ARM64_SVE
if (likely(elf_hwcap & HWCAP_SVE)) {
sve_alloc(thread);
result = sve_alloc(thread);
}
#endif /* CONFIG_ARM64_SVE */
out:
if (result) {
release_fp_regs(thread);
}
return result;
}
/*@
@ requires \valid(thread);
@*/
void
int
save_fp_regs(struct thread *thread)
{
int ret = 0;
if (thread == &cpu_local_var(idle)) {
return;
goto out;
}
if (likely(elf_hwcap & (HWCAP_FP | HWCAP_ASIMD))) {
if (check_and_allocate_fp_regs(thread) != 0) {
// alloc error.
return;
ret = check_and_allocate_fp_regs(thread);
if (ret) {
goto out;
}
thread_fpsimd_save(thread);
}
out:
return ret;
}
void copy_fp_regs(struct thread *from, struct thread *to)
int copy_fp_regs(struct thread *from, struct thread *to)
{
if ((from->fp_regs != NULL) && (check_and_allocate_fp_regs(to) == 0)) {
memcpy(to->fp_regs, from->fp_regs, sizeof(fp_regs_struct));
int ret = 0;
if (from->fp_regs != NULL) {
ret = check_and_allocate_fp_regs(to);
if (!ret) {
memcpy(to->fp_regs,
from->fp_regs,
sizeof(fp_regs_struct));
}
}
return ret;
}
void clear_fp_regs(void)