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-rw-r--r--arch/powerpc/mm/Makefile1
-rw-r--r--arch/powerpc/mm/fsl_booke_mmu.c43
-rw-r--r--arch/powerpc/mm/gup.c12
-rw-r--r--arch/powerpc/mm/hash_utils_64.c9
-rw-r--r--arch/powerpc/mm/hugetlbpage-book3e.c121
-rw-r--r--arch/powerpc/mm/hugetlbpage.c400
-rw-r--r--arch/powerpc/mm/init_32.c9
-rw-r--r--arch/powerpc/mm/mem.c8
-rw-r--r--arch/powerpc/mm/mmu_context_hash64.c12
-rw-r--r--arch/powerpc/mm/mmu_context_nohash.c5
-rw-r--r--arch/powerpc/mm/mmu_decl.h2
-rw-r--r--arch/powerpc/mm/numa.c20
-rw-r--r--arch/powerpc/mm/pgtable.c3
-rw-r--r--arch/powerpc/mm/tlb_low_64e.S24
-rw-r--r--arch/powerpc/mm/tlb_nohash.c67
15 files changed, 619 insertions, 117 deletions
diff --git a/arch/powerpc/mm/Makefile b/arch/powerpc/mm/Makefile
index bdca46e08382..991ee813d2a8 100644
--- a/arch/powerpc/mm/Makefile
+++ b/arch/powerpc/mm/Makefile
@@ -29,6 +29,7 @@ obj-$(CONFIG_PPC_MM_SLICES) += slice.o
ifeq ($(CONFIG_HUGETLB_PAGE),y)
obj-y += hugetlbpage.o
obj-$(CONFIG_PPC_STD_MMU_64) += hugetlbpage-hash64.o
+obj-$(CONFIG_PPC_BOOK3E_MMU) += hugetlbpage-book3e.o
endif
obj-$(CONFIG_PPC_SUBPAGE_PROT) += subpage-prot.o
obj-$(CONFIG_NOT_COHERENT_CACHE) += dma-noncoherent.o
diff --git a/arch/powerpc/mm/fsl_booke_mmu.c b/arch/powerpc/mm/fsl_booke_mmu.c
index f7802c8bba0a..66a6fd38e9cd 100644
--- a/arch/powerpc/mm/fsl_booke_mmu.c
+++ b/arch/powerpc/mm/fsl_booke_mmu.c
@@ -101,17 +101,17 @@ unsigned long p_mapped_by_tlbcam(phys_addr_t pa)
/*
* Set up a variable-size TLB entry (tlbcam). The parameters are not checked;
- * in particular size must be a power of 4 between 4k and 256M (or 1G, for cpus
- * that support extended page sizes). Note that while some cpus support a
- * page size of 4G, we don't allow its use here.
+ * in particular size must be a power of 4 between 4k and the max supported by
+ * an implementation; max may further be limited by what can be represented in
+ * an unsigned long (for example, 32-bit implementations cannot support a 4GB
+ * size).
*/
static void settlbcam(int index, unsigned long virt, phys_addr_t phys,
unsigned long size, unsigned long flags, unsigned int pid)
{
- unsigned int tsize, lz;
+ unsigned int tsize;
- asm (PPC_CNTLZL "%0,%1" : "=r" (lz) : "r" (size));
- tsize = 21 - lz;
+ tsize = __ilog2(size) - 10;
#ifdef CONFIG_SMP
if ((flags & _PAGE_NO_CACHE) == 0)
@@ -146,29 +146,36 @@ static void settlbcam(int index, unsigned long virt, phys_addr_t phys,
loadcam_entry(index);
}
+unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
+ phys_addr_t phys)
+{
+ unsigned int camsize = __ilog2(ram) & ~1U;
+ unsigned int align = __ffs(virt | phys) & ~1U;
+ unsigned long max_cam = (mfspr(SPRN_TLB1CFG) >> 16) & 0xf;
+
+ /* Convert (4^max) kB to (2^max) bytes */
+ max_cam = max_cam * 2 + 10;
+
+ if (camsize > align)
+ camsize = align;
+ if (camsize > max_cam)
+ camsize = max_cam;
+
+ return 1UL << camsize;
+}
+
unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx)
{
int i;
unsigned long virt = PAGE_OFFSET;
phys_addr_t phys = memstart_addr;
unsigned long amount_mapped = 0;
- unsigned long max_cam = (mfspr(SPRN_TLB1CFG) >> 16) & 0xf;
-
- /* Convert (4^max) kB to (2^max) bytes */
- max_cam = max_cam * 2 + 10;
/* Calculate CAM values */
for (i = 0; ram && i < max_cam_idx; i++) {
- unsigned int camsize = __ilog2(ram) & ~1U;
- unsigned int align = __ffs(virt | phys) & ~1U;
unsigned long cam_sz;
- if (camsize > align)
- camsize = align;
- if (camsize > max_cam)
- camsize = max_cam;
-
- cam_sz = 1UL << camsize;
+ cam_sz = calc_cam_sz(ram, virt, phys);
settlbcam(i, virt, phys, cam_sz, PAGE_KERNEL_X, 0);
ram -= cam_sz;
diff --git a/arch/powerpc/mm/gup.c b/arch/powerpc/mm/gup.c
index fec13200868f..d7efdbf640c7 100644
--- a/arch/powerpc/mm/gup.c
+++ b/arch/powerpc/mm/gup.c
@@ -16,16 +16,6 @@
#ifdef __HAVE_ARCH_PTE_SPECIAL
-static inline void get_huge_page_tail(struct page *page)
-{
- /*
- * __split_huge_page_refcount() cannot run
- * from under us.
- */
- VM_BUG_ON(atomic_read(&page->_count) < 0);
- atomic_inc(&page->_count);
-}
-
/*
* The performance critical leaf functions are made noinline otherwise gcc
* inlines everything into a single function which results in too much
@@ -57,8 +47,6 @@ static noinline int gup_pte_range(pmd_t pmd, unsigned long addr,
put_page(page);
return 0;
}
- if (PageTail(page))
- get_huge_page_tail(page);
pages[*nr] = page;
(*nr)++;
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index 8352db050192..2d282186cb45 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -106,9 +106,6 @@ int mmu_kernel_ssize = MMU_SEGSIZE_256M;
int mmu_highuser_ssize = MMU_SEGSIZE_256M;
u16 mmu_slb_size = 64;
EXPORT_SYMBOL_GPL(mmu_slb_size);
-#ifdef CONFIG_HUGETLB_PAGE
-unsigned int HPAGE_SHIFT;
-#endif
#ifdef CONFIG_PPC_64K_PAGES
int mmu_ci_restrictions;
#endif
@@ -535,11 +532,11 @@ static unsigned long __init htab_get_table_size(void)
}
#ifdef CONFIG_MEMORY_HOTPLUG
-void create_section_mapping(unsigned long start, unsigned long end)
+int create_section_mapping(unsigned long start, unsigned long end)
{
- BUG_ON(htab_bolt_mapping(start, end, __pa(start),
+ return htab_bolt_mapping(start, end, __pa(start),
pgprot_val(PAGE_KERNEL), mmu_linear_psize,
- mmu_kernel_ssize));
+ mmu_kernel_ssize);
}
int remove_section_mapping(unsigned long start, unsigned long end)
diff --git a/arch/powerpc/mm/hugetlbpage-book3e.c b/arch/powerpc/mm/hugetlbpage-book3e.c
new file mode 100644
index 000000000000..343ad0b87261
--- /dev/null
+++ b/arch/powerpc/mm/hugetlbpage-book3e.c
@@ -0,0 +1,121 @@
+/*
+ * PPC Huge TLB Page Support for Book3E MMU
+ *
+ * Copyright (C) 2009 David Gibson, IBM Corporation.
+ * Copyright (C) 2011 Becky Bruce, Freescale Semiconductor
+ *
+ */
+#include <linux/mm.h>
+#include <linux/hugetlb.h>
+
+static inline int mmu_get_tsize(int psize)
+{
+ return mmu_psize_defs[psize].enc;
+}
+
+static inline int book3e_tlb_exists(unsigned long ea, unsigned long pid)
+{
+ int found = 0;
+
+ mtspr(SPRN_MAS6, pid << 16);
+ if (mmu_has_feature(MMU_FTR_USE_TLBRSRV)) {
+ asm volatile(
+ "li %0,0\n"
+ "tlbsx. 0,%1\n"
+ "bne 1f\n"
+ "li %0,1\n"
+ "1:\n"
+ : "=&r"(found) : "r"(ea));
+ } else {
+ asm volatile(
+ "tlbsx 0,%1\n"
+ "mfspr %0,0x271\n"
+ "srwi %0,%0,31\n"
+ : "=&r"(found) : "r"(ea));
+ }
+
+ return found;
+}
+
+void book3e_hugetlb_preload(struct mm_struct *mm, unsigned long ea, pte_t pte)
+{
+ unsigned long mas1, mas2;
+ u64 mas7_3;
+ unsigned long psize, tsize, shift;
+ unsigned long flags;
+
+#ifdef CONFIG_PPC_FSL_BOOK3E
+ int index, lz, ncams;
+ struct vm_area_struct *vma;
+#endif
+
+ if (unlikely(is_kernel_addr(ea)))
+ return;
+
+#ifdef CONFIG_PPC_MM_SLICES
+ psize = mmu_get_tsize(get_slice_psize(mm, ea));
+ tsize = mmu_get_psize(psize);
+ shift = mmu_psize_defs[psize].shift;
+#else
+ vma = find_vma(mm, ea);
+ psize = vma_mmu_pagesize(vma); /* returns actual size in bytes */
+ asm (PPC_CNTLZL "%0,%1" : "=r" (lz) : "r" (psize));
+ shift = 31 - lz;
+ tsize = 21 - lz;
+#endif
+
+ /*
+ * We can't be interrupted while we're setting up the MAS
+ * regusters or after we've confirmed that no tlb exists.
+ */
+ local_irq_save(flags);
+
+ if (unlikely(book3e_tlb_exists(ea, mm->context.id))) {
+ local_irq_restore(flags);
+ return;
+ }
+
+#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);
+ 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;
+ mas7_3 = (u64)pte_pfn(pte) << PAGE_SHIFT;
+ mas7_3 |= (pte_val(pte) >> PTE_BAP_SHIFT) & MAS3_BAP_MASK;
+ if (!pte_dirty(pte))
+ mas7_3 &= ~(MAS3_SW|MAS3_UW);
+
+ mtspr(SPRN_MAS1, mas1);
+ mtspr(SPRN_MAS2, mas2);
+
+ if (mmu_has_feature(MMU_FTR_USE_PAIRED_MAS)) {
+ mtspr(SPRN_MAS7_MAS3, mas7_3);
+ } else {
+ mtspr(SPRN_MAS7, upper_32_bits(mas7_3));
+ mtspr(SPRN_MAS3, lower_32_bits(mas7_3));
+ }
+
+ asm volatile ("tlbwe");
+
+ local_irq_restore(flags);
+}
+
+void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
+{
+ struct hstate *hstate = hstate_file(vma->vm_file);
+ unsigned long tsize = huge_page_shift(hstate) - 10;
+
+ __flush_tlb_page(vma ? vma->vm_mm : NULL, vmaddr, tsize, 0);
+
+}
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c
index 0b9a5c1901b9..5964371303ac 100644
--- a/arch/powerpc/mm/hugetlbpage.c
+++ b/arch/powerpc/mm/hugetlbpage.c
@@ -1,7 +1,8 @@
/*
- * PPC64 (POWER4) Huge TLB Page Support for Kernel.
+ * PPC Huge TLB Page Support for Kernel.
*
* Copyright (C) 2003 David Gibson, IBM Corporation.
+ * Copyright (C) 2011 Becky Bruce, Freescale Semiconductor
*
* Based on the IA-32 version:
* Copyright (C) 2002, Rohit Seth <rohit.seth@intel.com>
@@ -11,24 +12,39 @@
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/hugetlb.h>
+#include <linux/of_fdt.h>
+#include <linux/memblock.h>
+#include <linux/bootmem.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/tlb.h>
+#include <asm/setup.h>
#define PAGE_SHIFT_64K 16
#define PAGE_SHIFT_16M 24
#define PAGE_SHIFT_16G 34
-#define MAX_NUMBER_GPAGES 1024
+unsigned int HPAGE_SHIFT;
-/* Tracks the 16G pages after the device tree is scanned and before the
- * huge_boot_pages list is ready. */
-static unsigned long gpage_freearray[MAX_NUMBER_GPAGES];
+/*
+ * Tracks gpages after the device tree is scanned and before the
+ * huge_boot_pages list is ready. On 64-bit implementations, this is
+ * just used to track 16G pages and so is a single array. 32-bit
+ * implementations may have more than one gpage size due to limitations
+ * of the memory allocators, so we need multiple arrays
+ */
+#ifdef CONFIG_PPC64
+#define MAX_NUMBER_GPAGES 1024
+static u64 gpage_freearray[MAX_NUMBER_GPAGES];
static unsigned nr_gpages;
-
-/* Flag to mark huge PD pointers. This means pmd_bad() and pud_bad()
- * will choke on pointers to hugepte tables, which is handy for
- * catching screwups early. */
+#else
+#define MAX_NUMBER_GPAGES 128
+struct psize_gpages {
+ u64 gpage_list[MAX_NUMBER_GPAGES];
+ unsigned int nr_gpages;
+};
+static struct psize_gpages gpage_freearray[MMU_PAGE_COUNT];
+#endif
static inline int shift_to_mmu_psize(unsigned int shift)
{
@@ -49,25 +65,6 @@ static inline unsigned int mmu_psize_to_shift(unsigned int mmu_psize)
#define hugepd_none(hpd) ((hpd).pd == 0)
-static inline pte_t *hugepd_page(hugepd_t hpd)
-{
- BUG_ON(!hugepd_ok(hpd));
- return (pte_t *)((hpd.pd & ~HUGEPD_SHIFT_MASK) | 0xc000000000000000);
-}
-
-static inline unsigned int hugepd_shift(hugepd_t hpd)
-{
- return hpd.pd & HUGEPD_SHIFT_MASK;
-}
-
-static inline pte_t *hugepte_offset(hugepd_t *hpdp, unsigned long addr, unsigned pdshift)
-{
- unsigned long idx = (addr & ((1UL << pdshift) - 1)) >> hugepd_shift(*hpdp);
- pte_t *dir = hugepd_page(*hpdp);
-
- return dir + idx;
-}
-
pte_t *find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea, unsigned *shift)
{
pgd_t *pg;
@@ -93,7 +90,7 @@ pte_t *find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea, unsigned *shift
if (is_hugepd(pm))
hpdp = (hugepd_t *)pm;
else if (!pmd_none(*pm)) {
- return pte_offset_map(pm, ea);
+ return pte_offset_kernel(pm, ea);
}
}
}
@@ -114,8 +111,18 @@ pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
static int __hugepte_alloc(struct mm_struct *mm, hugepd_t *hpdp,
unsigned long address, unsigned pdshift, unsigned pshift)
{
- pte_t *new = kmem_cache_zalloc(PGT_CACHE(pdshift - pshift),
- GFP_KERNEL|__GFP_REPEAT);
+ struct kmem_cache *cachep;
+ pte_t *new;
+
+#ifdef CONFIG_PPC64
+ cachep = PGT_CACHE(pdshift - pshift);
+#else
+ int i;
+ int num_hugepd = 1 << (pshift - pdshift);
+ cachep = hugepte_cache;
+#endif
+
+ new = kmem_cache_zalloc(cachep, GFP_KERNEL|__GFP_REPEAT);
BUG_ON(pshift > HUGEPD_SHIFT_MASK);
BUG_ON((unsigned long)new & HUGEPD_SHIFT_MASK);
@@ -124,10 +131,31 @@ static int __hugepte_alloc(struct mm_struct *mm, hugepd_t *hpdp,
return -ENOMEM;
spin_lock(&mm->page_table_lock);
+#ifdef CONFIG_PPC64
if (!hugepd_none(*hpdp))
- kmem_cache_free(PGT_CACHE(pdshift - pshift), new);
+ kmem_cache_free(cachep, new);
else
- hpdp->pd = ((unsigned long)new & ~0x8000000000000000) | pshift;
+ hpdp->pd = ((unsigned long)new & ~PD_HUGE) | pshift;
+#else
+ /*
+ * We have multiple higher-level entries that point to the same
+ * actual pte location. Fill in each as we go and backtrack on error.
+ * We need all of these so the DTLB pgtable walk code can find the
+ * right higher-level entry without knowing if it's a hugepage or not.
+ */
+ for (i = 0; i < num_hugepd; i++, hpdp++) {
+ if (unlikely(!hugepd_none(*hpdp)))
+ break;
+ else
+ hpdp->pd = ((unsigned long)new & ~PD_HUGE) | pshift;
+ }
+ /* If we bailed from the for loop early, an error occurred, clean up */
+ if (i < num_hugepd) {
+ for (i = i - 1 ; i >= 0; i--, hpdp--)
+ hpdp->pd = 0;
+ kmem_cache_free(cachep, new);
+ }
+#endif
spin_unlock(&mm->page_table_lock);
return 0;
}
@@ -169,11 +197,132 @@ pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long sz
return hugepte_offset(hpdp, addr, pdshift);
}
+#ifdef CONFIG_PPC32
+/* Build list of addresses of gigantic pages. This function is used in early
+ * boot before the buddy or bootmem allocator is setup.
+ */
+void add_gpage(u64 addr, u64 page_size, unsigned long number_of_pages)
+{
+ unsigned int idx = shift_to_mmu_psize(__ffs(page_size));
+ int i;
+
+ if (addr == 0)
+ return;
+
+ gpage_freearray[idx].nr_gpages = number_of_pages;
+
+ for (i = 0; i < number_of_pages; i++) {
+ gpage_freearray[idx].gpage_list[i] = addr;
+ addr += page_size;
+ }
+}
+
+/*
+ * Moves the gigantic page addresses from the temporary list to the
+ * huge_boot_pages list.
+ */
+int alloc_bootmem_huge_page(struct hstate *hstate)
+{
+ struct huge_bootmem_page *m;
+ int idx = shift_to_mmu_psize(hstate->order + PAGE_SHIFT);
+ int nr_gpages = gpage_freearray[idx].nr_gpages;
+
+ if (nr_gpages == 0)
+ return 0;
+
+#ifdef CONFIG_HIGHMEM
+ /*
+ * If gpages can be in highmem we can't use the trick of storing the
+ * data structure in the page; allocate space for this
+ */
+ m = alloc_bootmem(sizeof(struct huge_bootmem_page));
+ m->phys = gpage_freearray[idx].gpage_list[--nr_gpages];
+#else
+ m = phys_to_virt(gpage_freearray[idx].gpage_list[--nr_gpages]);
+#endif
+
+ list_add(&m->list, &huge_boot_pages);
+ gpage_freearray[idx].nr_gpages = nr_gpages;
+ gpage_freearray[idx].gpage_list[nr_gpages] = 0;
+ m->hstate = hstate;
+
+ return 1;
+}
+/*
+ * Scan the command line hugepagesz= options for gigantic pages; store those in
+ * a list that we use to allocate the memory once all options are parsed.
+ */
+
+unsigned long gpage_npages[MMU_PAGE_COUNT];
+
+static int __init do_gpage_early_setup(char *param, char *val)
+{
+ static phys_addr_t size;
+ unsigned long npages;
+
+ /*
+ * The hugepagesz and hugepages cmdline options are interleaved. We
+ * use the size variable to keep track of whether or not this was done
+ * properly and skip over instances where it is incorrect. Other
+ * command-line parsing code will issue warnings, so we don't need to.
+ *
+ */
+ if ((strcmp(param, "default_hugepagesz") == 0) ||
+ (strcmp(param, "hugepagesz") == 0)) {
+ size = memparse(val, NULL);
+ } else if (strcmp(param, "hugepages") == 0) {
+ if (size != 0) {
+ if (sscanf(val, "%lu", &npages) <= 0)
+ npages = 0;
+ gpage_npages[shift_to_mmu_psize(__ffs(size))] = npages;
+ size = 0;
+ }
+ }
+ return 0;
+}
+
+
+/*
+ * This function allocates physical space for pages that are larger than the
+ * buddy allocator can handle. We want to allocate these in highmem because
+ * the amount of lowmem is limited. This means that this function MUST be
+ * called before lowmem_end_addr is set up in MMU_init() in order for the lmb
+ * allocate to grab highmem.
+ */
+void __init reserve_hugetlb_gpages(void)
+{
+ static __initdata char cmdline[COMMAND_LINE_SIZE];
+ phys_addr_t size, base;
+ int i;
+
+ strlcpy(cmdline, boot_command_line, COMMAND_LINE_SIZE);
+ parse_args("hugetlb gpages", cmdline, NULL, 0, &do_gpage_early_setup);
+
+ /*
+ * Walk gpage list in reverse, allocating larger page sizes first.
+ * Skip over unsupported sizes, or sizes that have 0 gpages allocated.
+ * When we reach the point in the list where pages are no longer
+ * considered gpages, we're done.
+ */
+ for (i = MMU_PAGE_COUNT-1; i >= 0; i--) {
+ if (mmu_psize_defs[i].shift == 0 || gpage_npages[i] == 0)
+ continue;
+ else if (mmu_psize_to_shift(i) < (MAX_ORDER + PAGE_SHIFT))
+ break;
+
+ size = (phys_addr_t)(1ULL << mmu_psize_to_shift(i));
+ base = memblock_alloc_base(size * gpage_npages[i], size,
+ MEMBLOCK_ALLOC_ANYWHERE);
+ add_gpage(base, size, gpage_npages[i]);
+ }
+}
+
+#else /* PPC64 */
+
/* Build list of addresses of gigantic pages. This function is used in early
* boot before the buddy or bootmem allocator is setup.
*/
-void add_gpage(unsigned long addr, unsigned long page_size,
- unsigned long number_of_pages)
+void add_gpage(u64 addr, u64 page_size, unsigned long number_of_pages)
{
if (!addr)
return;
@@ -199,19 +348,79 @@ int alloc_bootmem_huge_page(struct hstate *hstate)
m->hstate = hstate;
return 1;
}
+#endif
int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
{
return 0;
}
+#ifdef CONFIG_PPC32
+#define HUGEPD_FREELIST_SIZE \
+ ((PAGE_SIZE - sizeof(struct hugepd_freelist)) / sizeof(pte_t))
+
+struct hugepd_freelist {
+ struct rcu_head rcu;
+ unsigned int index;
+ void *ptes[0];
+};
+
+static DEFINE_PER_CPU(struct hugepd_freelist *, hugepd_freelist_cur);
+
+static void hugepd_free_rcu_callback(struct rcu_head *head)
+{
+ struct hugepd_freelist *batch =
+ container_of(head, struct hugepd_freelist, rcu);
+ unsigned int i;
+
+ for (i = 0; i < batch->index; i++)
+ kmem_cache_free(hugepte_cache, batch->ptes[i]);
+
+ free_page((unsigned long)batch);
+}
+
+static void hugepd_free(struct mmu_gather *tlb, void *hugepte)
+{
+ struct hugepd_freelist **batchp;
+
+ batchp = &__get_cpu_var(hugepd_freelist_cur);
+
+ if (atomic_read(&tlb->mm->mm_users) < 2 ||
+ cpumask_equal(mm_cpumask(tlb->mm),
+ cpumask_of(smp_processor_id()))) {
+ kmem_cache_free(hugepte_cache, hugepte);
+ return;
+ }
+
+ if (*batchp == NULL) {
+ *batchp = (struct hugepd_freelist *)__get_free_page(GFP_ATOMIC);
+ (*batchp)->index = 0;
+ }
+
+ (*batchp)->ptes[(*batchp)->index++] = hugepte;
+ if ((*batchp)->index == HUGEPD_FREELIST_SIZE) {
+ call_rcu_sched(&(*batchp)->rcu, hugepd_free_rcu_callback);
+ *batchp = NULL;
+ }
+}
+#endif
+
static void free_hugepd_range(struct mmu_gather *tlb, hugepd_t *hpdp, int pdshift,
unsigned long start, unsigned long end,
unsigned long floor, unsigned long ceiling)
{
pte_t *hugepte = hugepd_page(*hpdp);
- unsigned shift = hugepd_shift(*hpdp);
+ int i;
+
unsigned long pdmask = ~((1UL << pdshift) - 1);
+ unsigned int num_hugepd = 1;
+
+#ifdef CONFIG_PPC64
+ unsigned int shift = hugepd_shift(*hpdp);
+#else
+ /* Note: On 32-bit the hpdp may be the first of several */
+ num_hugepd = (1 << (hugepd_shift(*hpdp) - pdshift));
+#endif
start &= pdmask;
if (start < floor)
@@ -224,9 +433,15 @@ static void free_hugepd_range(struct mmu_gather *tlb, hugepd_t *hpdp, int pdshif
if (end - 1 > ceiling - 1)
return;
- hpdp->pd = 0;
+ for (i = 0; i < num_hugepd; i++, hpdp++)
+ hpdp->pd = 0;
+
tlb->need_flush = 1;
+#ifdef CONFIG_PPC64
pgtable_free_tlb(tlb, hugepte, pdshift - shift);
+#else
+ hugepd_free(tlb, hugepte);
+#endif
}
static void hugetlb_free_pmd_range(struct mmu_gather *tlb, pud_t *pud,
@@ -331,18 +546,27 @@ void hugetlb_free_pgd_range(struct mmu_gather *tlb,
* too.
*/
- pgd = pgd_offset(tlb->mm, addr);
do {
next = pgd_addr_end(addr, end);
+ pgd = pgd_offset(tlb->mm, addr);
if (!is_hugepd(pgd)) {
if (pgd_none_or_clear_bad(pgd))
continue;
hugetlb_free_pud_range(tlb, pgd, addr, next, floor, ceiling);
} else {
+#ifdef CONFIG_PPC32
+ /*
+ * Increment next by the size of the huge mapping since
+ * on 32-bit there may be more than one entry at the pgd
+ * level for a single hugepage, but all of them point to
+ * the same kmem cache that holds the hugepte.
+ */
+ next = addr + (1 << hugepd_shift(*(hugepd_t *)pgd));
+#endif
free_hugepd_range(tlb, (hugepd_t *)pgd, PGDIR_SHIFT,
addr, next, floor, ceiling);
}
- } while (pgd++, addr = next, addr != end);
+ } while (addr = next, addr != end);
}
struct page *
@@ -390,7 +614,7 @@ static noinline int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long add
{
unsigned long mask;
unsigned long pte_end;
- struct page *head, *page;
+ struct page *head, *page, *tail;
pte_t pte;
int refs;
@@ -413,6 +637,7 @@ static noinline int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long add
head = pte_page(pte);
page = head + ((addr & (sz-1)) >> PAGE_SHIFT);
+ tail = page;
do {
VM_BUG_ON(compound_head(page) != head);
pages[*nr] = page;
@@ -428,10 +653,20 @@ static noinline int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long add
if (unlikely(pte_val(pte) != pte_val(*ptep))) {
/* Could be optimized better */
- while (*nr) {
- put_page(page);
- (*nr)--;
- }
+ *nr -= refs;
+ while (refs--)
+ put_page(head);
+ return 0;
+ }
+
+ /*
+ * Any tail page need their mapcount reference taken before we
+ * return.
+ */
+ while (refs--) {
+ if (PageTail(tail))
+ get_huge_page_tail(tail);
+ tail++;
}
return 1;
@@ -466,17 +701,35 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
unsigned long len, unsigned long pgoff,
unsigned long flags)
{
+#ifdef CONFIG_PPC_MM_SLICES
struct hstate *hstate = hstate_file(file);
int mmu_psize = shift_to_mmu_psize(huge_page_shift(hstate));
return slice_get_unmapped_area(addr, len, flags, mmu_psize, 1, 0);
+#else
+ return get_unmapped_area(file, addr, len, pgoff, flags);
+#endif
}
unsigned long vma_mmu_pagesize(struct vm_area_struct *vma)
{
+#ifdef CONFIG_PPC_MM_SLICES
unsigned int psize = get_slice_psize(vma->vm_mm, vma->vm_start);
return 1UL << mmu_psize_to_shift(psize);
+#else
+ if (!is_vm_hugetlb_page(vma))
+ return PAGE_SIZE;
+
+ return huge_page_size(hstate_vma(vma));
+#endif
+}
+
+static inline bool is_power_of_4(unsigned long x)
+{
+ if (is_power_of_2(x))
+ return (__ilog2(x) % 2) ? false : true;
+ return false;
}
static int __init add_huge_page_size(unsigned long long size)
@@ -486,9 +739,14 @@ static int __init add_huge_page_size(unsigned long long size)
/* Check that it is a page size supported by the hardware and
* that it fits within pagetable and slice limits. */
+#ifdef CONFIG_PPC_FSL_BOOK3E
+ if ((size < PAGE_SIZE) || !is_power_of_4(size))
+ return -EINVAL;
+#else
if (!is_power_of_2(size)
|| (shift > SLICE_HIGH_SHIFT) || (shift <= PAGE_SHIFT))
return -EINVAL;
+#endif
if ((mmu_psize = shift_to_mmu_psize(shift)) < 0)
return -EINVAL;
@@ -525,6 +783,46 @@ static int __init hugepage_setup_sz(char *str)
}
__setup("hugepagesz=", hugepage_setup_sz);
+#ifdef CONFIG_FSL_BOOKE
+struct kmem_cache *hugepte_cache;
+static int __init hugetlbpage_init(void)
+{
+ int psize;
+
+ for (psize = 0; psize < MMU_PAGE_COUNT; ++psize) {
+ unsigned shift;
+
+ if (!mmu_psize_defs[psize].shift)
+ continue;
+
+ shift = mmu_psize_to_shift(psize);
+
+ /* Don't treat normal page sizes as huge... */
+ if (shift != PAGE_SHIFT)
+ if (add_huge_page_size(1ULL << shift) < 0)
+ continue;
+ }
+
+ /*
+ * Create a kmem cache for hugeptes. The bottom bits in the pte have
+ * size information encoded in them, so align them to allow this
+ */
+ hugepte_cache = kmem_cache_create("hugepte-cache", sizeof(pte_t),
+ HUGEPD_SHIFT_MASK + 1, 0, NULL);
+ if (hugepte_cache == NULL)
+ panic("%s: Unable to create kmem cache for hugeptes\n",
+ __func__);
+
+ /* Default hpage size = 4M */
+ if (mmu_psize_defs[MMU_PAGE_4M].shift)
+ HPAGE_SHIFT = mmu_psize_defs[MMU_PAGE_4M].shift;
+ else
+ panic("%s: Unable to set default huge page size\n", __func__);
+
+
+ return 0;
+}
+#else
static int __init hugetlbpage_init(void)
{
int psize;
@@ -567,15 +865,23 @@ static int __init hugetlbpage_init(void)
return 0;
}
-
+#endif
module_init(hugetlbpage_init);
void flush_dcache_icache_hugepage(struct page *page)
{
int i;
+ void *start;
BUG_ON(!PageCompound(page));
- for (i = 0; i < (1UL << compound_order(page)); i++)
- __flush_dcache_icache(page_address(page+i));
+ for (i = 0; i < (1UL << compound_order(page)); i++) {
+ if (!PageHighMem(page)) {
+ __flush_dcache_icache(page_address(page+i));
+ } else {
+ start = kmap_atomic(page+i, KM_PPC_SYNC_ICACHE);
+ __flush_dcache_icache(start);
+ kunmap_atomic(start, KM_PPC_SYNC_ICACHE);
+ }
+ }
}
diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c
index c77fef56dad6..161cefde5c15 100644
--- a/arch/powerpc/mm/init_32.c
+++ b/arch/powerpc/mm/init_32.c
@@ -32,6 +32,8 @@
#include <linux/pagemap.h>
#include <linux/memblock.h>
#include <linux/gfp.h>
+#include <linux/slab.h>
+#include <linux/hugetlb.h>
#include <asm/pgalloc.h>
#include <asm/prom.h>
@@ -44,6 +46,7 @@
#include <asm/tlb.h>
#include <asm/sections.h>
#include <asm/system.h>
+#include <asm/hugetlb.h>
#include "mmu_decl.h"
@@ -123,6 +126,12 @@ void __init MMU_init(void)
/* parse args from command line */
MMU_setup();
+ /*
+ * Reserve gigantic pages for hugetlb. This MUST occur before
+ * lowmem_end_addr is initialized below.
+ */
+ reserve_hugetlb_gpages();
+
if (memblock.memory.cnt > 1) {
#ifndef CONFIG_WII
memblock.memory.cnt = 1;
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 507963ee9aa4..16da595ff402 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -123,7 +123,8 @@ int arch_add_memory(int nid, u64 start, u64 size)
pgdata = NODE_DATA(nid);
start = (unsigned long)__va(start);
- create_section_mapping(start, start + size);
+ if (create_section_mapping(start, start + size))
+ return -EINVAL;
/* this should work for most non-highmem platforms */
zone = pgdata->node_zones;
@@ -548,4 +549,9 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
return;
hash_preload(vma->vm_mm, address, access, trap);
#endif /* CONFIG_PPC_STD_MMU */
+#if (defined(CONFIG_PPC_BOOK3E_64) || defined(CONFIG_PPC_FSL_BOOK3E)) \
+ && defined(CONFIG_HUGETLB_PAGE)
+ if (is_vm_hugetlb_page(vma))
+ book3e_hugetlb_preload(vma->vm_mm, address, *ptep);
+#endif
}
diff --git a/arch/powerpc/mm/mmu_context_hash64.c b/arch/powerpc/mm/mmu_context_hash64.c
index f599f91255ce..ca988a3d5fb2 100644
--- a/arch/powerpc/mm/mmu_context_hash64.c
+++ b/arch/powerpc/mm/mmu_context_hash64.c
@@ -136,8 +136,8 @@ int use_cop(unsigned long acop, struct mm_struct *mm)
if (!mm || !acop)
return -EINVAL;
- /* We need to make sure mm_users doesn't change */
- down_read(&mm->mmap_sem);
+ /* The page_table_lock ensures mm_users won't change under us */
+ spin_lock(&mm->page_table_lock);
spin_lock(mm->context.cop_lockp);
if (mm->context.cop_pid == COP_PID_NONE) {
@@ -164,7 +164,7 @@ int use_cop(unsigned long acop, struct mm_struct *mm)
out:
spin_unlock(mm->context.cop_lockp);
- up_read(&mm->mmap_sem);
+ spin_unlock(&mm->page_table_lock);
return ret;
}
@@ -185,8 +185,8 @@ void drop_cop(unsigned long acop, struct mm_struct *mm)
if (WARN_ON_ONCE(!mm))
return;
- /* We need to make sure mm_users doesn't change */
- down_read(&mm->mmap_sem);
+ /* The page_table_lock ensures mm_users won't change under us */
+ spin_lock(&mm->page_table_lock);
spin_lock(mm->context.cop_lockp);
mm->context.acop &= ~acop;
@@ -213,7 +213,7 @@ void drop_cop(unsigned long acop, struct mm_struct *mm)
}
spin_unlock(mm->context.cop_lockp);
- up_read(&mm->mmap_sem);
+ spin_unlock(&mm->page_table_lock);
}
EXPORT_SYMBOL_GPL(drop_cop);
diff --git a/arch/powerpc/mm/mmu_context_nohash.c b/arch/powerpc/mm/mmu_context_nohash.c
index 336807de550e..5b63bd3da4a9 100644
--- a/arch/powerpc/mm/mmu_context_nohash.c
+++ b/arch/powerpc/mm/mmu_context_nohash.c
@@ -292,6 +292,11 @@ int init_new_context(struct task_struct *t, struct mm_struct *mm)
mm->context.id = MMU_NO_CONTEXT;
mm->context.active = 0;
+#ifdef CONFIG_PPC_MM_SLICES
+ if (slice_mm_new_context(mm))
+ slice_set_user_psize(mm, mmu_virtual_psize);
+#endif
+
return 0;
}
diff --git a/arch/powerpc/mm/mmu_decl.h b/arch/powerpc/mm/mmu_decl.h
index dd0a2589591d..83eb5d5f53d5 100644
--- a/arch/powerpc/mm/mmu_decl.h
+++ b/arch/powerpc/mm/mmu_decl.h
@@ -142,6 +142,8 @@ extern unsigned long mmu_mapin_ram(unsigned long top);
#elif defined(CONFIG_PPC_FSL_BOOK3E)
extern unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx);
+extern unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
+ phys_addr_t phys);
#ifdef CONFIG_PPC32
extern void MMU_init_hw(void);
extern unsigned long mmu_mapin_ram(unsigned long top);
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 1a7c44d8d669..c7dd4dec4df8 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -709,8 +709,7 @@ static void __init parse_drconf_memory(struct device_node *memory)
static int __init parse_numa_properties(void)
{
- struct device_node *cpu = NULL;
- struct device_node *memory = NULL;
+ struct device_node *memory;
int default_nid = 0;
unsigned long i;
@@ -732,6 +731,7 @@ static int __init parse_numa_properties(void)
* each node to be onlined must have NODE_DATA etc backing it.
*/
for_each_present_cpu(i) {
+ struct device_node *cpu;
int nid;
cpu = of_get_cpu_node(i, NULL);
@@ -750,8 +750,8 @@ static int __init parse_numa_properties(void)
}
get_n_mem_cells(&n_mem_addr_cells, &n_mem_size_cells);
- memory = NULL;
- while ((memory = of_find_node_by_type(memory, "memory")) != NULL) {
+
+ for_each_node_by_type(memory, "memory") {
unsigned long start;
unsigned long size;
int nid;
@@ -800,8 +800,9 @@ new_range:
}
/*
- * Now do the same thing for each MEMBLOCK listed in the ibm,dynamic-memory
- * property in the ibm,dynamic-reconfiguration-memory node.
+ * Now do the same thing for each MEMBLOCK listed in the
+ * ibm,dynamic-memory property in the
+ * ibm,dynamic-reconfiguration-memory node.
*/
memory = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory");
if (memory)
@@ -1187,10 +1188,10 @@ static int hot_add_drconf_scn_to_nid(struct device_node *memory,
*/
int hot_add_node_scn_to_nid(unsigned long scn_addr)
{
- struct device_node *memory = NULL;
+ struct device_node *memory;
int nid = -1;
- while ((memory = of_find_node_by_type(memory, "memory")) != NULL) {
+ for_each_node_by_type(memory, "memory") {
unsigned long start, size;
int ranges;
const unsigned int *memcell_buf;
@@ -1214,11 +1215,12 @@ int hot_add_node_scn_to_nid(unsigned long scn_addr)
break;
}
- of_node_put(memory);
if (nid >= 0)
break;
}
+ of_node_put(memory);
+
return nid;
}
diff --git a/arch/powerpc/mm/pgtable.c b/arch/powerpc/mm/pgtable.c
index af40c8768a78..214130a4edc6 100644
--- a/arch/powerpc/mm/pgtable.c
+++ b/arch/powerpc/mm/pgtable.c
@@ -27,6 +27,7 @@
#include <linux/init.h>
#include <linux/percpu.h>
#include <linux/hardirq.h>
+#include <linux/hugetlb.h>
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
#include <asm/tlb.h>
@@ -212,7 +213,7 @@ int ptep_set_access_flags(struct vm_area_struct *vma, unsigned long address,
entry = set_access_flags_filter(entry, vma, dirty);
changed = !pte_same(*(ptep), entry);
if (changed) {
- if (!(vma->vm_flags & VM_HUGETLB))
+ if (!is_vm_hugetlb_page(vma))
assert_pte_locked(vma->vm_mm, address);
__ptep_set_access_flags(ptep, entry);
flush_tlb_page_nohash(vma, address);
diff --git a/arch/powerpc/mm/tlb_low_64e.S b/arch/powerpc/mm/tlb_low_64e.S
index 4ebb34bc01d6..dc4a5f385e41 100644
--- a/arch/powerpc/mm/tlb_low_64e.S
+++ b/arch/powerpc/mm/tlb_low_64e.S
@@ -553,24 +553,24 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_USE_TLBRSRV)
rldicl r11,r16,64-VPTE_PGD_SHIFT,64-PGD_INDEX_SIZE-3
clrrdi r10,r11,3
ldx r15,r10,r15
- cmpldi cr0,r15,0
- beq virt_page_table_tlb_miss_fault
+ cmpdi cr0,r15,0
+ bge virt_page_table_tlb_miss_fault
#ifndef CONFIG_PPC_64K_PAGES
/* Get to PUD entry */
rldicl r11,r16,64-VPTE_PUD_SHIFT,64-PUD_INDEX_SIZE-3
clrrdi r10,r11,3
ldx r15,r10,r15
- cmpldi cr0,r15,0
- beq virt_page_table_tlb_miss_fault
+ cmpdi cr0,r15,0
+ bge virt_page_table_tlb_miss_fault
#endif /* CONFIG_PPC_64K_PAGES */
/* Get to PMD entry */
rldicl r11,r16,64-VPTE_PMD_SHIFT,64-PMD_INDEX_SIZE-3
clrrdi r10,r11,3
ldx r15,r10,r15
- cmpldi cr0,r15,0
- beq virt_page_table_tlb_miss_fault
+ cmpdi cr0,r15,0
+ bge virt_page_table_tlb_miss_fault
/* Ok, we're all right, we can now create a kernel translation for
* a 4K or 64K page from r16 -> r15.
@@ -802,24 +802,24 @@ htw_tlb_miss:
rldicl r11,r16,64-(PGDIR_SHIFT-3),64-PGD_INDEX_SIZE-3
clrrdi r10,r11,3
ldx r15,r10,r15
- cmpldi cr0,r15,0
- beq htw_tlb_miss_fault
+ cmpdi cr0,r15,0
+ bge htw_tlb_miss_fault
#ifndef CONFIG_PPC_64K_PAGES
/* Get to PUD entry */
rldicl r11,r16,64-(PUD_SHIFT-3),64-PUD_INDEX_SIZE-3
clrrdi r10,r11,3
ldx r15,r10,r15
- cmpldi cr0,r15,0
- beq htw_tlb_miss_fault
+ cmpdi cr0,r15,0
+ bge htw_tlb_miss_fault
#endif /* CONFIG_PPC_64K_PAGES */
/* Get to PMD entry */
rldicl r11,r16,64-(PMD_SHIFT-3),64-PMD_INDEX_SIZE-3
clrrdi r10,r11,3
ldx r15,r10,r15
- cmpldi cr0,r15,0
- beq htw_tlb_miss_fault
+ cmpdi cr0,r15,0
+ bge htw_tlb_miss_fault
/* Ok, we're all right, we can now create an indirect entry for
* a 1M or 256M page.
diff --git a/arch/powerpc/mm/tlb_nohash.c b/arch/powerpc/mm/tlb_nohash.c
index 0ff8ab5702a9..4e13d6f9023e 100644
--- a/arch/powerpc/mm/tlb_nohash.c
+++ b/arch/powerpc/mm/tlb_nohash.c
@@ -37,14 +37,49 @@
#include <linux/spinlock.h>
#include <linux/memblock.h>
#include <linux/of_fdt.h>
+#include <linux/hugetlb.h>
#include <asm/tlbflush.h>
#include <asm/tlb.h>
#include <asm/code-patching.h>
+#include <asm/hugetlb.h>
#include "mmu_decl.h"
-#ifdef CONFIG_PPC_BOOK3E
+/*
+ * This struct lists the sw-supported page sizes. The hardawre MMU may support
+ * other sizes not listed here. The .ind field is only used on MMUs that have
+ * indirect page table entries.
+ */
+#ifdef CONFIG_PPC_BOOK3E_MMU
+#ifdef CONFIG_FSL_BOOKE
+struct mmu_psize_def mmu_psize_defs[MMU_PAGE_COUNT] = {
+ [MMU_PAGE_4K] = {
+ .shift = 12,
+ .enc = BOOK3E_PAGESZ_4K,
+ },
+ [MMU_PAGE_4M] = {
+ .shift = 22,
+ .enc = BOOK3E_PAGESZ_4M,
+ },
+ [MMU_PAGE_16M] = {
+ .shift = 24,
+ .enc = BOOK3E_PAGESZ_16M,
+ },
+ [MMU_PAGE_64M] = {
+ .shift = 26,
+ .enc = BOOK3E_PAGESZ_64M,
+ },
+ [MMU_PAGE_256M] = {
+ .shift = 28,
+ .enc = BOOK3E_PAGESZ_256M,
+ },
+ [MMU_PAGE_1G] = {
+ .shift = 30,
+ .enc = BOOK3E_PAGESZ_1GB,
+ },
+};
+#else
struct mmu_psize_def mmu_psize_defs[MMU_PAGE_COUNT] = {
[MMU_PAGE_4K] = {
.shift = 12,
@@ -78,6 +113,8 @@ struct mmu_psize_def mmu_psize_defs[MMU_PAGE_COUNT] = {
.enc = BOOK3E_PAGESZ_1GB,
},
};
+#endif /* CONFIG_FSL_BOOKE */
+
static inline int mmu_get_tsize(int psize)
{
return mmu_psize_defs[psize].enc;
@@ -88,7 +125,7 @@ static inline int mmu_get_tsize(int psize)
/* This isn't used on !Book3E for now */
return 0;
}
-#endif
+#endif /* CONFIG_PPC_BOOK3E_MMU */
/* The variables below are currently only used on 64-bit Book3E
* though this will probably be made common with other nohash
@@ -267,6 +304,11 @@ void __flush_tlb_page(struct mm_struct *mm, unsigned long vmaddr,
void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
{
+#ifdef CONFIG_HUGETLB_PAGE
+ if (is_vm_hugetlb_page(vma))
+ flush_hugetlb_page(vma, vmaddr);
+#endif
+
__flush_tlb_page(vma ? vma->vm_mm : NULL, vmaddr,
mmu_get_tsize(mmu_virtual_psize), 0);
}
@@ -601,13 +643,28 @@ void __cpuinit early_init_mmu_secondary(void)
void setup_initial_memory_limit(phys_addr_t first_memblock_base,
phys_addr_t first_memblock_size)
{
- /* On Embedded 64-bit, we adjust the RMA size to match
+ /* On non-FSL Embedded 64-bit, we adjust the RMA size to match
* the bolted TLB entry. We know for now that only 1G
* entries are supported though that may eventually
- * change. We crop it to the size of the first MEMBLOCK to
+ * change.
+ *
+ * on FSL Embedded 64-bit, we adjust the RMA size to match the
+ * first bolted TLB entry size. We still limit max to 1G even if
+ * the TLB could cover more. This is due to what the early init
+ * code is setup to do.
+ *
+ * We crop it to the size of the first MEMBLOCK to
* avoid going over total available memory just in case...
*/
- ppc64_rma_size = min_t(u64, first_memblock_size, 0x40000000);
+#ifdef CONFIG_PPC_FSL_BOOK3E
+ if (mmu_has_feature(MMU_FTR_TYPE_FSL_E)) {
+ unsigned long linear_sz;
+ linear_sz = calc_cam_sz(first_memblock_size, PAGE_OFFSET,
+ first_memblock_base);
+ ppc64_rma_size = min_t(u64, linear_sz, 0x40000000);
+ } else
+#endif
+ ppc64_rma_size = min_t(u64, first_memblock_size, 0x40000000);
/* Finally limit subsequent allocations */
memblock_set_current_limit(first_memblock_base + ppc64_rma_size);
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-09 18:52:50 +0000