From: Laurent Dufour <ldufour@linux.vnet.ibm.com>
To: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Cc: aneesh.kumar@linux.ibm.com, mpe@ellerman.id.au,
benh@kernel.crashing.org, paulus@samba.org, npiggin@gmail.com
Subject: [PATCH v2 2/3] powerpc/pseries/mm: factorize PTE slot computation
Date: Mon, 20 Aug 2018 16:29:35 +0200 [thread overview]
Message-ID: <1534775376-22480-3-git-send-email-ldufour@linux.vnet.ibm.com> (raw)
In-Reply-To: <1534775376-22480-1-git-send-email-ldufour@linux.vnet.ibm.com>
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>
---
arch/powerpc/platforms/pseries/lpar.c | 27 ++++++++++++++++++++-------
1 file changed, 20 insertions(+), 7 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
index d3992ced0782..ebc852e3607d 100644
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -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
--
2.7.4
next prev parent reply other threads:[~2018-08-20 14:29 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-20 14:29 [PATCH v2 0/3] powerpc/pseries: use H_BLOCK_REMOVE Laurent Dufour
2018-08-20 14:29 ` [PATCH v2 1/3] powerpc/pseries/mm: Introducing FW_FEATURE_BLOCK_REMOVE Laurent Dufour
2018-09-20 4:20 ` [v2,1/3] " Michael Ellerman
2018-08-20 14:29 ` Laurent Dufour [this message]
2018-08-20 14:29 ` [PATCH v2 3/3] powerpc/pseries/mm: call H_BLOCK_REMOVE Laurent Dufour
2018-09-10 13:38 ` [PATCH v2 0/3] powerpc/pseries: use H_BLOCK_REMOVE Laurent Dufour
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