diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2017-07-19 14:49:04 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-08-02 13:11:05 +1000 |
| commit | 5ce5fe14ed0302315061cf97ce67accd1b25b938 (patch) | |
| tree | b013eec43d27f4d26eaf3973fa8ee25bfa1d72df /arch/powerpc/mm/tlb-radix.c | |
| parent | 75f327c6b75715f3a090daeb33e05003aaffb010 (diff) | |
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>
Diffstat (limited to 'arch/powerpc/mm/tlb-radix.c')
| -rw-r--r-- | arch/powerpc/mm/tlb-radix.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/arch/powerpc/mm/tlb-radix.c b/arch/powerpc/mm/tlb-radix.c index 744e0164ecf5..2f2967a2db93 100644 --- a/arch/powerpc/mm/tlb-radix.c +++ b/arch/powerpc/mm/tlb-radix.c @@ -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"); |