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powerpc/fsl-book3e-64: Use paca for hugetlb TLB1 entry selection

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This keeps usage coordinated for hugetlb and indirect entries, which
should make entry selection more predictable and probably improve overall
performance when mixing the two.

Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Scott Wood 2013-10-11 19:22:39 -05:00
parent 28efc35fe6
commit bbead78c06
1 changed files with 41 additions and 10 deletions
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51
arch/powerpc/mm/hugetlbpage-book3e.c
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@ -8,6 +8,44 @@
#include <linux/mm.h>
#include <linux/hugetlb.h>
#ifdef CONFIG_PPC_FSL_BOOK3E
#ifdef CONFIG_PPC64
static inline int tlb1_next(void)
{
struct paca_struct *paca = get_paca();
struct tlb_core_data *tcd;
int this, next;
tcd = paca->tcd_ptr;
this = tcd->esel_next;
next = this + 1;
if (next >= tcd->esel_max)
next = tcd->esel_first;
tcd->esel_next = next;
return this;
}
#else
static inline int tlb1_next(void)
{
int index, ncams;
ncams = mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY;
index = __get_cpu_var(next_tlbcam_idx);
/* Just round-robin the entries and wrap when we hit the end */
if (unlikely(index == ncams - 1))
__get_cpu_var(next_tlbcam_idx) = tlbcam_index;
else
__get_cpu_var(next_tlbcam_idx)++;
return index;
}
#endif /* !PPC64 */
#endif /* FSL */
static inline int mmu_get_tsize(int psize)
{
return mmu_psize_defs[psize].enc;
@ -47,7 +85,7 @@ void book3e_hugetlb_preload(struct vm_area_struct *vma, unsigned long ea,
struct mm_struct *mm;
#ifdef CONFIG_PPC_FSL_BOOK3E
int index, ncams;
int index;
#endif
if (unlikely(is_kernel_addr(ea)))
@ -77,18 +115,11 @@ void book3e_hugetlb_preload(struct vm_area_struct *vma, unsigned long ea,
}
#ifdef CONFIG_PPC_FSL_BOOK3E
ncams = mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY;
/* We have to use the CAM(TLB1) on FSL parts for hugepages */
index = __get_cpu_var(next_tlbcam_idx);
index = tlb1_next();
mtspr(SPRN_MAS0, MAS0_ESEL(index) | MAS0_TLBSEL(1));
/* Just round-robin the entries and wrap when we hit the end */
if (unlikely(index == ncams - 1))
__get_cpu_var(next_tlbcam_idx) = tlbcam_index;
else
__get_cpu_var(next_tlbcam_idx)++;
#endif
mas1 = MAS1_VALID | MAS1_TID(mm->context.id) | MAS1_TSIZE(tsize);
mas2 = ea & ~((1UL << shift) - 1);
mas2 |= (pte_val(pte) >> PTE_WIMGE_SHIFT) & MAS2_WIMGE_MASK;