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powerpc/pseries/mm: factorize PTE slot computation

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This part of code will be called also when dealing with H_BLOCK_REMOVE.

Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Laurent Dufour 2018-08-20 16:29:35 +02:00 committed by Michael Ellerman
parent 5600fbe340
commit 0effa488dc
1 changed files with 20 additions and 7 deletions
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27
arch/powerpc/platforms/pseries/lpar.c
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@ -546,6 +546,24 @@ static int pSeries_lpar_hpte_removebolted(unsigned long ea,
return 0;
}
static inline unsigned long compute_slot(real_pte_t pte,
unsigned long vpn,
unsigned long index,
unsigned long shift,
int ssize)
{
unsigned long slot, hash, hidx;
hash = hpt_hash(vpn, shift, ssize);
hidx = __rpte_to_hidx(pte, index);
if (hidx & _PTEIDX_SECONDARY)
hash = ~hash;
slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
slot += hidx & _PTEIDX_GROUP_IX;
return slot;
}
/*
* Take a spinlock around flushes to avoid bouncing the hypervisor tlbie
* lock.
@ -558,7 +576,7 @@ static void pSeries_lpar_flush_hash_range(unsigned long number, int local)
struct ppc64_tlb_batch *batch = this_cpu_ptr(&ppc64_tlb_batch);
int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE);
unsigned long param[PLPAR_HCALL9_BUFSIZE];
unsigned long hash, index, shift, hidx, slot;
unsigned long index, shift, slot;
real_pte_t pte;
int psize, ssize;
@ -572,12 +590,7 @@ static void pSeries_lpar_flush_hash_range(unsigned long number, int local)
vpn = batch->vpn[i];
pte = batch->pte[i];
pte_iterate_hashed_subpages(pte, psize, vpn, index, shift) {
hash = hpt_hash(vpn, shift, ssize);
hidx = __rpte_to_hidx(pte, index);
if (hidx & _PTEIDX_SECONDARY)
hash = ~hash;
slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
slot += hidx & _PTEIDX_GROUP_IX;
slot = compute_slot(pte, vpn, index, shift, ssize);
if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) {
/*
* lpar doesn't use the passed actual page size