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powerpc/mm/radix: Improve _tlbiel_pid to be usable for PWC flushes 

The PWC flush only needs a single set call, just like the
full (RIC=2) flush.

This will allow us to get rid of the dedicated _tlbiel_pwc()

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
hifive-unleashed-5.1
Benjamin Herrenschmidt 2017-07-19 14:49:04 +10:00 committed by Michael Ellerman
parent 75f327c6b7
commit 5ce5fe14ed
1 changed files with 7 additions and 4 deletions
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11
arch/powerpc/mm/tlb-radix.c
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@ -54,12 +54,15 @@ static inline void _tlbiel_pid(unsigned long pid, unsigned long ric)
*/
__tlbiel_pid(pid, 0, ric);
if (ric == RIC_FLUSH_ALL)
/* For the remaining sets, just flush the TLB */
ric = RIC_FLUSH_TLB;
/* For PWC, only one flush is needed */
if (ric == RIC_FLUSH_PWC) {
asm volatile("ptesync": : :"memory");
return;
}
/* For the remaining sets, just flush the TLB */
for (set = 1; set < POWER9_TLB_SETS_RADIX ; set++)
__tlbiel_pid(pid, set, ric);
__tlbiel_pid(pid, set, RIC_FLUSH_TLB);
asm volatile("ptesync": : :"memory");
asm volatile(PPC_INVALIDATE_ERAT "; isync" : : :"memory");