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powerpc: Use TIDR CPU feature to control TIDR allocation

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Switch the use of TIDR on it's CPU feature, rather than assuming it
is available based on architecture.

Signed-off-by: Alastair D'Silva <alastair@d-silva.org>
Reviewed-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Alastair D'Silva 2018-05-11 16:12:58 +10:00 committed by Michael Ellerman
parent 819844285e
commit 3449f191ca
1 changed files with 3 additions and 3 deletions
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6
arch/powerpc/kernel/process.c
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@ -1151,7 +1151,7 @@ static inline void restore_sprs(struct thread_struct *old_thread,
mtspr(SPRN_TAR, new_thread->tar);
}
if (cpu_has_feature(CPU_FTR_ARCH_300) &&
if (cpu_has_feature(CPU_FTR_P9_TIDR) &&
old_thread->tidr != new_thread->tidr)
mtspr(SPRN_TIDR, new_thread->tidr);
#endif
@ -1553,7 +1553,7 @@ void clear_thread_tidr(struct task_struct *t)
if (!t->thread.tidr)
return;
if (!cpu_has_feature(CPU_FTR_ARCH_300)) {
if (!cpu_has_feature(CPU_FTR_P9_TIDR)) {
WARN_ON_ONCE(1);
return;
}
@ -1576,7 +1576,7 @@ int set_thread_tidr(struct task_struct *t)
{
int rc;
if (!cpu_has_feature(CPU_FTR_ARCH_300))
if (!cpu_has_feature(CPU_FTR_P9_TIDR))
return -EINVAL;
if (t != current)