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-rw-r--r--arch/powerpc/mm/40x_mmu.c2
-rw-r--r--arch/powerpc/mm/44x_mmu.c2
-rw-r--r--arch/powerpc/mm/Makefile5
-rw-r--r--arch/powerpc/mm/fault.c8
-rw-r--r--arch/powerpc/mm/fsl_booke_mmu.c132
-rw-r--r--arch/powerpc/mm/gup.c149
-rw-r--r--arch/powerpc/mm/hash_utils_64.c46
-rw-r--r--arch/powerpc/mm/hugetlbpage-hash64.c139
-rw-r--r--arch/powerpc/mm/hugetlbpage.c792
-rw-r--r--arch/powerpc/mm/init_32.c9
-rw-r--r--arch/powerpc/mm/init_64.c76
-rw-r--r--arch/powerpc/mm/mem.c17
-rw-r--r--arch/powerpc/mm/mmu_context_hash64.c26
-rw-r--r--arch/powerpc/mm/mmu_decl.h28
-rw-r--r--arch/powerpc/mm/pgtable.c25
-rw-r--r--arch/powerpc/mm/pgtable_32.c36
-rw-r--r--arch/powerpc/mm/ppc_mmu_32.c4
-rw-r--r--arch/powerpc/mm/subpage-prot.c15
-rw-r--r--arch/powerpc/mm/tlb_hash64.c8
19 files changed, 738 insertions, 781 deletions
diff --git a/arch/powerpc/mm/40x_mmu.c b/arch/powerpc/mm/40x_mmu.c
index f5e7b9ce63d..08dfa8e6d86 100644
--- a/arch/powerpc/mm/40x_mmu.c
+++ b/arch/powerpc/mm/40x_mmu.c
@@ -91,7 +91,7 @@ void __init MMU_init_hw(void)
#define LARGE_PAGE_SIZE_16M (1<<24)
#define LARGE_PAGE_SIZE_4M (1<<22)
-unsigned long __init mmu_mapin_ram(void)
+unsigned long __init mmu_mapin_ram(unsigned long top)
{
unsigned long v, s, mapped;
phys_addr_t p;
diff --git a/arch/powerpc/mm/44x_mmu.c b/arch/powerpc/mm/44x_mmu.c
index 98052ac9658..3986264b099 100644
--- a/arch/powerpc/mm/44x_mmu.c
+++ b/arch/powerpc/mm/44x_mmu.c
@@ -88,7 +88,7 @@ void __init MMU_init_hw(void)
flush_instruction_cache();
}
-unsigned long __init mmu_mapin_ram(void)
+unsigned long __init mmu_mapin_ram(unsigned long top)
{
unsigned long addr;
diff --git a/arch/powerpc/mm/Makefile b/arch/powerpc/mm/Makefile
index 6fb8fc8d2fe..ce68708bbad 100644
--- a/arch/powerpc/mm/Makefile
+++ b/arch/powerpc/mm/Makefile
@@ -28,7 +28,10 @@ obj-$(CONFIG_44x) += 44x_mmu.o
obj-$(CONFIG_FSL_BOOKE) += fsl_booke_mmu.o
obj-$(CONFIG_NEED_MULTIPLE_NODES) += numa.o
obj-$(CONFIG_PPC_MM_SLICES) += slice.o
-obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
+ifeq ($(CONFIG_HUGETLB_PAGE),y)
+obj-y += hugetlbpage.o
+obj-$(CONFIG_PPC_STD_MMU_64) += hugetlbpage-hash64.o
+endif
obj-$(CONFIG_PPC_SUBPAGE_PROT) += subpage-prot.o
obj-$(CONFIG_NOT_COHERENT_CACHE) += dma-noncoherent.o
obj-$(CONFIG_HIGHMEM) += highmem.o
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index e7dae82c128..26fb6b990b0 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -40,7 +40,7 @@
#include <asm/uaccess.h>
#include <asm/tlbflush.h>
#include <asm/siginfo.h>
-
+#include <mm/mmu_decl.h>
#ifdef CONFIG_KPROBES
static inline int notify_page_fault(struct pt_regs *regs)
@@ -246,6 +246,12 @@ good_area:
goto bad_area;
#endif /* CONFIG_6xx */
#if defined(CONFIG_8xx)
+ /* 8xx sometimes need to load a invalid/non-present TLBs.
+ * These must be invalidated separately as linux mm don't.
+ */
+ if (error_code & 0x40000000) /* no translation? */
+ _tlbil_va(address, 0, 0, 0);
+
/* The MPC8xx seems to always set 0x80000000, which is
* "undefined". Of those that can be set, this is the only
* one which seems bad.
diff --git a/arch/powerpc/mm/fsl_booke_mmu.c b/arch/powerpc/mm/fsl_booke_mmu.c
index dc93e95b256..c5394728bf2 100644
--- a/arch/powerpc/mm/fsl_booke_mmu.c
+++ b/arch/powerpc/mm/fsl_booke_mmu.c
@@ -54,26 +54,35 @@
#include "mmu_decl.h"
-extern void loadcam_entry(unsigned int index);
unsigned int tlbcam_index;
-static unsigned long cam[CONFIG_LOWMEM_CAM_NUM];
-#define NUM_TLBCAMS (16)
+#define NUM_TLBCAMS (64)
#if defined(CONFIG_LOWMEM_CAM_NUM_BOOL) && (CONFIG_LOWMEM_CAM_NUM >= NUM_TLBCAMS)
#error "LOWMEM_CAM_NUM must be less than NUM_TLBCAMS"
#endif
-struct tlbcam TLBCAM[NUM_TLBCAMS];
+struct tlbcam {
+ u32 MAS0;
+ u32 MAS1;
+ unsigned long MAS2;
+ u32 MAS3;
+ u32 MAS7;
+} TLBCAM[NUM_TLBCAMS];
struct tlbcamrange {
- unsigned long start;
+ unsigned long start;
unsigned long limit;
phys_addr_t phys;
} tlbcam_addrs[NUM_TLBCAMS];
extern unsigned int tlbcam_index;
+unsigned long tlbcam_sz(int idx)
+{
+ return tlbcam_addrs[idx].limit - tlbcam_addrs[idx].start + 1;
+}
+
/*
* Return PA for this VA if it is mapped by a CAM, or 0
*/
@@ -94,23 +103,36 @@ unsigned long p_mapped_by_tlbcam(phys_addr_t pa)
int b;
for (b = 0; b < tlbcam_index; ++b)
if (pa >= tlbcam_addrs[b].phys
- && pa < (tlbcam_addrs[b].limit-tlbcam_addrs[b].start)
+ && pa < (tlbcam_addrs[b].limit-tlbcam_addrs[b].start)
+tlbcam_addrs[b].phys)
return tlbcam_addrs[b].start+(pa-tlbcam_addrs[b].phys);
return 0;
}
+void loadcam_entry(int idx)
+{
+ mtspr(SPRN_MAS0, TLBCAM[idx].MAS0);
+ mtspr(SPRN_MAS1, TLBCAM[idx].MAS1);
+ mtspr(SPRN_MAS2, TLBCAM[idx].MAS2);
+ mtspr(SPRN_MAS3, TLBCAM[idx].MAS3);
+
+ if (cur_cpu_spec->cpu_features & MMU_FTR_BIG_PHYS)
+ mtspr(SPRN_MAS7, TLBCAM[idx].MAS7);
+
+ asm volatile("isync;tlbwe;isync" : : : "memory");
+}
+
/*
* Set up one of the I/D BAT (block address translation) register pairs.
* The parameters are not checked; in particular size must be a power
* of 4 between 4k and 256M.
*/
-void settlbcam(int index, unsigned long virt, phys_addr_t phys,
- unsigned int size, int flags, unsigned int pid)
+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;
- asm ("cntlzw %0,%1" : "=r" (lz) : "r" (size));
+ asm (PPC_CNTLZL "%0,%1" : "=r" (lz) : "r" (size));
tsize = 21 - lz;
#ifdef CONFIG_SMP
@@ -128,8 +150,10 @@ void settlbcam(int index, unsigned long virt, phys_addr_t phys,
TLBCAM[index].MAS2 |= (flags & _PAGE_GUARDED) ? MAS2_G : 0;
TLBCAM[index].MAS2 |= (flags & _PAGE_ENDIAN) ? MAS2_E : 0;
- TLBCAM[index].MAS3 = (phys & PAGE_MASK) | MAS3_SX | MAS3_SR;
+ TLBCAM[index].MAS3 = (phys & MAS3_RPN) | MAS3_SX | MAS3_SR;
TLBCAM[index].MAS3 |= ((flags & _PAGE_RW) ? MAS3_SW : 0);
+ if (cur_cpu_spec->cpu_features & MMU_FTR_BIG_PHYS)
+ TLBCAM[index].MAS7 = (u64)phys >> 32;
#ifndef CONFIG_KGDB /* want user access for breakpoints */
if (flags & _PAGE_USER) {
@@ -148,27 +172,44 @@ void settlbcam(int index, unsigned long virt, phys_addr_t phys,
loadcam_entry(index);
}
-void invalidate_tlbcam_entry(int index)
-{
- TLBCAM[index].MAS0 = MAS0_TLBSEL(1) | MAS0_ESEL(index);
- TLBCAM[index].MAS1 = ~MAS1_VALID;
-
- loadcam_entry(index);
-}
-
-unsigned long __init mmu_mapin_ram(void)
+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;
- while (tlbcam_index < ARRAY_SIZE(cam) && cam[tlbcam_index]) {
- settlbcam(tlbcam_index, virt, phys, cam[tlbcam_index], PAGE_KERNEL_X, 0);
- virt += cam[tlbcam_index];
- phys += cam[tlbcam_index];
- tlbcam_index++;
+ /* 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;
+ settlbcam(i, virt, phys, cam_sz, PAGE_KERNEL_X, 0);
+
+ ram -= cam_sz;
+ amount_mapped += cam_sz;
+ virt += cam_sz;
+ phys += cam_sz;
}
+ tlbcam_index = i;
- return virt - PAGE_OFFSET;
+ return amount_mapped;
+}
+
+unsigned long __init mmu_mapin_ram(unsigned long top)
+{
+ return tlbcam_addrs[tlbcam_index - 1].limit - PAGE_OFFSET + 1;
}
/*
@@ -179,46 +220,21 @@ void __init MMU_init_hw(void)
flush_instruction_cache();
}
-void __init
-adjust_total_lowmem(void)
+void __init adjust_total_lowmem(void)
{
- phys_addr_t ram;
- unsigned int max_cam = (mfspr(SPRN_TLB1CFG) >> 16) & 0xff;
- char buf[ARRAY_SIZE(cam) * 5 + 1], *p = buf;
+ unsigned long ram;
int i;
- unsigned long virt = PAGE_OFFSET & 0xffffffffUL;
- unsigned long phys = memstart_addr & 0xffffffffUL;
-
- /* Convert (4^max) kB to (2^max) bytes */
- max_cam = max_cam * 2 + 10;
/* adjust lowmem size to __max_low_memory */
ram = min((phys_addr_t)__max_low_memory, (phys_addr_t)total_lowmem);
- /* Calculate CAM values */
- __max_low_memory = 0;
- for (i = 0; ram && i < ARRAY_SIZE(cam); i++) {
- unsigned int camsize = __ilog2(ram) & ~1U;
- unsigned int align = __ffs(virt | phys) & ~1U;
-
- if (camsize > align)
- camsize = align;
- if (camsize > max_cam)
- camsize = max_cam;
-
- cam[i] = 1UL << camsize;
- ram -= cam[i];
- __max_low_memory += cam[i];
- virt += cam[i];
- phys += cam[i];
+ __max_low_memory = map_mem_in_cams(ram, CONFIG_LOWMEM_CAM_NUM);
- p += sprintf(p, "%lu/", cam[i] >> 20);
- }
- for (; i < ARRAY_SIZE(cam); i++)
- p += sprintf(p, "0/");
- p[-1] = '\0';
-
- pr_info("Memory CAM mapping: %s Mb, residual: %dMb\n", buf,
+ pr_info("Memory CAM mapping: ");
+ for (i = 0; i < tlbcam_index - 1; i++)
+ pr_cont("%lu/", tlbcam_sz(i) >> 20);
+ pr_cont("%lu Mb, residual: %dMb\n", tlbcam_sz(tlbcam_index - 1) >> 20,
(unsigned int)((total_lowmem - __max_low_memory) >> 20));
+
__initial_memory_limit_addr = memstart_addr + __max_low_memory;
}
diff --git a/arch/powerpc/mm/gup.c b/arch/powerpc/mm/gup.c
index bc122a120bf..d7efdbf640c 100644
--- a/arch/powerpc/mm/gup.c
+++ b/arch/powerpc/mm/gup.c
@@ -55,57 +55,6 @@ static noinline int gup_pte_range(pmd_t pmd, unsigned long addr,
return 1;
}
-#ifdef CONFIG_HUGETLB_PAGE
-static noinline int gup_huge_pte(pte_t *ptep, struct hstate *hstate,
- unsigned long *addr, unsigned long end,
- int write, struct page **pages, int *nr)
-{
- unsigned long mask;
- unsigned long pte_end;
- struct page *head, *page;
- pte_t pte;
- int refs;
-
- pte_end = (*addr + huge_page_size(hstate)) & huge_page_mask(hstate);
- if (pte_end < end)
- end = pte_end;
-
- pte = *ptep;
- mask = _PAGE_PRESENT|_PAGE_USER;
- if (write)
- mask |= _PAGE_RW;
- if ((pte_val(pte) & mask) != mask)
- return 0;
- /* hugepages are never "special" */
- VM_BUG_ON(!pfn_valid(pte_pfn(pte)));
-
- refs = 0;
- head = pte_page(pte);
- page = head + ((*addr & ~huge_page_mask(hstate)) >> PAGE_SHIFT);
- do {
- VM_BUG_ON(compound_head(page) != head);
- pages[*nr] = page;
- (*nr)++;
- page++;
- refs++;
- } while (*addr += PAGE_SIZE, *addr != end);
-
- if (!page_cache_add_speculative(head, refs)) {
- *nr -= refs;
- return 0;
- }
- if (unlikely(pte_val(pte) != pte_val(*ptep))) {
- /* Could be optimized better */
- while (*nr) {
- put_page(page);
- (*nr)--;
- }
- }
-
- return 1;
-}
-#endif /* CONFIG_HUGETLB_PAGE */
-
static int gup_pmd_range(pud_t pud, unsigned long addr, unsigned long end,
int write, struct page **pages, int *nr)
{
@@ -119,7 +68,11 @@ static int gup_pmd_range(pud_t pud, unsigned long addr, unsigned long end,
next = pmd_addr_end(addr, end);
if (pmd_none(pmd))
return 0;
- if (!gup_pte_range(pmd, addr, next, write, pages, nr))
+ if (is_hugepd(pmdp)) {
+ if (!gup_hugepd((hugepd_t *)pmdp, PMD_SHIFT,
+ addr, next, write, pages, nr))
+ return 0;
+ } else if (!gup_pte_range(pmd, addr, next, write, pages, nr))
return 0;
} while (pmdp++, addr = next, addr != end);
@@ -139,7 +92,11 @@ static int gup_pud_range(pgd_t pgd, unsigned long addr, unsigned long end,
next = pud_addr_end(addr, end);
if (pud_none(pud))
return 0;
- if (!gup_pmd_range(pud, addr, next, write, pages, nr))
+ if (is_hugepd(pudp)) {
+ if (!gup_hugepd((hugepd_t *)pudp, PUD_SHIFT,
+ addr, next, write, pages, nr))
+ return 0;
+ } else if (!gup_pmd_range(pud, addr, next, write, pages, nr))
return 0;
} while (pudp++, addr = next, addr != end);
@@ -154,10 +111,6 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write,
unsigned long next;
pgd_t *pgdp;
int nr = 0;
-#ifdef CONFIG_PPC64
- unsigned int shift;
- int psize;
-#endif
pr_devel("%s(%lx,%x,%s)\n", __func__, start, nr_pages, write ? "write" : "read");
@@ -172,25 +125,6 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write,
pr_devel(" aligned: %lx .. %lx\n", start, end);
-#ifdef CONFIG_HUGETLB_PAGE
- /* We bail out on slice boundary crossing when hugetlb is
- * enabled in order to not have to deal with two different
- * page table formats
- */
- if (addr < SLICE_LOW_TOP) {
- if (end > SLICE_LOW_TOP)
- goto slow_irqon;
-
- if (unlikely(GET_LOW_SLICE_INDEX(addr) !=
- GET_LOW_SLICE_INDEX(end - 1)))
- goto slow_irqon;
- } else {
- if (unlikely(GET_HIGH_SLICE_INDEX(addr) !=
- GET_HIGH_SLICE_INDEX(end - 1)))
- goto slow_irqon;
- }
-#endif /* CONFIG_HUGETLB_PAGE */
-
/*
* XXX: batch / limit 'nr', to avoid large irq off latency
* needs some instrumenting to determine the common sizes used by
@@ -210,54 +144,23 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write,
*/
local_irq_disable();
-#ifdef CONFIG_PPC64
- /* Those bits are related to hugetlbfs implementation and only exist
- * on 64-bit for now
- */
- psize = get_slice_psize(mm, addr);
- shift = mmu_psize_defs[psize].shift;
-#endif /* CONFIG_PPC64 */
-
-#ifdef CONFIG_HUGETLB_PAGE
- if (unlikely(mmu_huge_psizes[psize])) {
- pte_t *ptep;
- unsigned long a = addr;
- unsigned long sz = ((1UL) << shift);
- struct hstate *hstate = size_to_hstate(sz);
-
- BUG_ON(!hstate);
- /*
- * XXX: could be optimized to avoid hstate
- * lookup entirely (just use shift)
- */
-
- do {
- VM_BUG_ON(shift != mmu_psize_defs[get_slice_psize(mm, a)].shift);
- ptep = huge_pte_offset(mm, a);
- pr_devel(" %016lx: huge ptep %p\n", a, ptep);
- if (!ptep || !gup_huge_pte(ptep, hstate, &a, end, write, pages,
- &nr))
- goto slow;
- } while (a != end);
- } else
-#endif /* CONFIG_HUGETLB_PAGE */
- {
- pgdp = pgd_offset(mm, addr);
- do {
- pgd_t pgd = *pgdp;
-
-#ifdef CONFIG_PPC64
- VM_BUG_ON(shift != mmu_psize_defs[get_slice_psize(mm, addr)].shift);
-#endif
- pr_devel(" %016lx: normal pgd %p\n", addr,
- (void *)pgd_val(pgd));
- next = pgd_addr_end(addr, end);
- if (pgd_none(pgd))
- goto slow;
- if (!gup_pud_range(pgd, addr, next, write, pages, &nr))
+ pgdp = pgd_offset(mm, addr);
+ do {
+ pgd_t pgd = *pgdp;
+
+ pr_devel(" %016lx: normal pgd %p\n", addr,
+ (void *)pgd_val(pgd));
+ next = pgd_addr_end(addr, end);
+ if (pgd_none(pgd))
+ goto slow;
+ if (is_hugepd(pgdp)) {
+ if (!gup_hugepd((hugepd_t *)pgdp, PGDIR_SHIFT,
+ addr, next, write, pages, &nr))
goto slow;
- } while (pgdp++, addr = next, addr != end);
- }
+ } else if (!gup_pud_range(pgd, addr, next, write, pages, &nr))
+ goto slow;
+ } while (pgdp++, addr = next, addr != end);
+
local_irq_enable();
VM_BUG_ON(nr != (end - start) >> PAGE_SHIFT);
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index 1ade7eb6ae0..50f867d657d 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -92,6 +92,7 @@ struct mmu_psize_def mmu_psize_defs[MMU_PAGE_COUNT];
struct hash_pte *htab_address;
unsigned long htab_size_bytes;
unsigned long htab_hash_mask;
+EXPORT_SYMBOL_GPL(htab_hash_mask);
int mmu_linear_psize = MMU_PAGE_4K;
int mmu_virtual_psize = MMU_PAGE_4K;
int mmu_vmalloc_psize = MMU_PAGE_4K;
@@ -102,6 +103,7 @@ int mmu_io_psize = MMU_PAGE_4K;
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
@@ -481,16 +483,6 @@ static void __init htab_init_page_sizes(void)
#ifdef CONFIG_HUGETLB_PAGE
/* Reserve 16G huge page memory sections for huge pages */
of_scan_flat_dt(htab_dt_scan_hugepage_blocks, NULL);
-
-/* Set default large page size. Currently, we pick 16M or 1M depending
- * on what is available
- */
- if (mmu_psize_defs[MMU_PAGE_16M].shift)
- HPAGE_SHIFT = mmu_psize_defs[MMU_PAGE_16M].shift;
- /* With 4k/4level pagetables, we can't (for now) cope with a
- * huge page size < PMD_SIZE */
- else if (mmu_psize_defs[MMU_PAGE_1M].shift)
- HPAGE_SHIFT = mmu_psize_defs[MMU_PAGE_1M].shift;
#endif /* CONFIG_HUGETLB_PAGE */
}
@@ -785,7 +777,7 @@ unsigned int hash_page_do_lazy_icache(unsigned int pp, pte_t pte, int trap)
/* page is dirty */
if (!test_bit(PG_arch_1, &page->flags) && !PageReserved(page)) {
if (trap == 0x400) {
- __flush_dcache_icache(page_address(page));
+ flush_dcache_icache_page(page);
set_bit(PG_arch_1, &page->flags);
} else
pp |= HPTE_R_N;
@@ -843,9 +835,9 @@ void demote_segment_4k(struct mm_struct *mm, unsigned long addr)
* Result is 0: full permissions, _PAGE_RW: read-only,
* _PAGE_USER or _PAGE_USER|_PAGE_RW: no access.
*/
-static int subpage_protection(pgd_t *pgdir, unsigned long ea)
+static int subpage_protection(struct mm_struct *mm, unsigned long ea)
{
- struct subpage_prot_table *spt = pgd_subpage_prot(pgdir);
+ struct subpage_prot_table *spt = &mm->context.spt;
u32 spp = 0;
u32 **sbpm, *sbpp;
@@ -873,7 +865,7 @@ static int subpage_protection(pgd_t *pgdir, unsigned long ea)
}
#else /* CONFIG_PPC_SUBPAGE_PROT */
-static inline int subpage_protection(pgd_t *pgdir, unsigned long ea)
+static inline int subpage_protection(struct mm_struct *mm, unsigned long ea)
{
return 0;
}
@@ -891,6 +883,7 @@ int hash_page(unsigned long ea, unsigned long access, unsigned long trap)
unsigned long vsid;
struct mm_struct *mm;
pte_t *ptep;
+ unsigned hugeshift;
const struct cpumask *tmp;
int rc, user_region = 0, local = 0;
int psize, ssize;
@@ -943,30 +936,31 @@ int hash_page(unsigned long ea, unsigned long access, unsigned long trap)
if (user_region && cpumask_equal(mm_cpumask(mm), tmp))
local = 1;
-#ifdef CONFIG_HUGETLB_PAGE
- /* Handle hugepage regions */
- if (HPAGE_SHIFT && mmu_huge_psizes[psize]) {
- DBG_LOW(" -> huge page !\n");
- return hash_huge_page(mm, access, ea, vsid, local, trap);
- }
-#endif /* CONFIG_HUGETLB_PAGE */
-
#ifndef CONFIG_PPC_64K_PAGES
- /* If we use 4K pages and our psize is not 4K, then we are hitting
- * a special driver mapping, we need to align the address before
- * we fetch the PTE
+ /* If we use 4K pages and our psize is not 4K, then we might
+ * be hitting a special driver mapping, and need to align the
+ * address before we fetch the PTE.
+ *
+ * It could also be a hugepage mapping, in which case this is
+ * not necessary, but it's not harmful, either.
*/
if (psize != MMU_PAGE_4K)
ea &= ~((1ul << mmu_psize_defs[psize].shift) - 1);
#endif /* CONFIG_PPC_64K_PAGES */
/* Get PTE and page size from page tables */
- ptep = find_linux_pte(pgdir, ea);
+ ptep = find_linux_pte_or_hugepte(pgdir, ea, &hugeshift);
if (ptep == NULL || !pte_present(*ptep)) {
DBG_LOW(" no PTE !\n");
return 1;
}
+#ifdef CONFIG_HUGETLB_PAGE
+ if (hugeshift)
+ return __hash_page_huge(ea, access, vsid, ptep, trap, local,
+ ssize, hugeshift, psize);
+#endif /* CONFIG_HUGETLB_PAGE */
+
#ifndef CONFIG_PPC_64K_PAGES
DBG_LOW(" i-pte: %016lx\n", pte_val(*ptep));
#else
diff --git a/arch/powerpc/mm/hugetlbpage-hash64.c b/arch/powerpc/mm/hugetlbpage-hash64.c
new file mode 100644
index 00000000000..199539882f9
--- /dev/null
+++ b/arch/powerpc/mm/hugetlbpage-hash64.c
@@ -0,0 +1,139 @@
+/*
+ * PPC64 Huge TLB Page Support for hash based MMUs (POWER4 and later)
+ *
+ * Copyright (C) 2003 David Gibson, IBM Corporation.
+ *
+ * Based on the IA-32 version:
+ * Copyright (C) 2002, Rohit Seth <rohit.seth@intel.com>
+ */
+
+#include <linux/mm.h>
+#include <linux/hugetlb.h>
+#include <asm/pgtable.h>
+#include <asm/pgalloc.h>
+#include <asm/cacheflush.h>
+#include <asm/machdep.h>
+
+int __hash_page_huge(unsigned long ea, unsigned long access, unsigned long vsid,
+ pte_t *ptep, unsigned long trap, int local, int ssize,
+ unsigned int shift, unsigned int mmu_psize)
+{
+ unsigned long old_pte, new_pte;
+ unsigned long va, rflags, pa, sz;
+ long slot;
+ int err = 1;
+
+ BUG_ON(shift != mmu_psize_defs[mmu_psize].shift);
+
+ /* Search the Linux page table for a match with va */
+ va = hpt_va(ea, vsid, ssize);
+
+ /*
+ * Check the user's access rights to the page. If access should be
+ * prevented then send the problem up to do_page_fault.
+ */
+ if (unlikely(access & ~pte_val(*ptep)))
+ goto out;
+ /*
+ * At this point, we have a pte (old_pte) which can be used to build
+ * or update an HPTE. There are 2 cases:
+ *
+ * 1. There is a valid (present) pte with no associated HPTE (this is
+ * the most common case)
+ * 2. There is a valid (present) pte with an associated HPTE. The
+ * current values of the pp bits in the HPTE prevent access
+ * because we are doing software DIRTY bit management and the
+ * page is currently not DIRTY.
+ */
+
+
+ do {
+ old_pte = pte_val(*ptep);
+ if (old_pte & _PAGE_BUSY)
+ goto out;
+ new_pte = old_pte | _PAGE_BUSY | _PAGE_ACCESSED;
+ } while(old_pte != __cmpxchg_u64((unsigned long *)ptep,
+ old_pte, new_pte));
+
+ rflags = 0x2 | (!(new_pte & _PAGE_RW));
+ /* _PAGE_EXEC -> HW_NO_EXEC since it's inverted */
+ rflags |= ((new_pte & _PAGE_EXEC) ? 0 : HPTE_R_N);
+ sz = ((1UL) << shift);
+ if (!cpu_has_feature(CPU_FTR_COHERENT_ICACHE))
+ /* No CPU has hugepages but lacks no execute, so we
+ * don't need to worry about that case */
+ rflags = hash_page_do_lazy_icache(rflags, __pte(old_pte), trap);
+
+ /* Check if pte already has an hpte (case 2) */
+ if (unlikely(old_pte & _PAGE_HASHPTE)) {
+ /* There MIGHT be an HPTE for this pte */
+ unsigned long hash, slot;
+
+ hash = hpt_hash(va, shift, ssize);
+ if (old_pte & _PAGE_F_SECOND)
+ hash = ~hash;
+ slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
+ slot += (old_pte & _PAGE_F_GIX) >> 12;
+
+ if (ppc_md.hpte_updatepp(slot, rflags, va, mmu_psize,
+ ssize, local) == -1)
+ old_pte &= ~_PAGE_HPTEFLAGS;
+ }
+
+ if (likely(!(old_pte & _PAGE_HASHPTE))) {
+ unsigned long hash = hpt_hash(va, shift, ssize);
+ unsigned long hpte_group;
+
+ pa = pte_pfn(__pte(old_pte)) << PAGE_SHIFT;
+
+repeat:
+ hpte_group = ((hash & htab_hash_mask) *
+ HPTES_PER_GROUP) & ~0x7UL;
+
+ /* clear HPTE slot informations in new PTE */
+#ifdef CONFIG_PPC_64K_PAGES
+ new_pte = (new_pte & ~_PAGE_HPTEFLAGS) | _PAGE_HPTE_SUB0;
+#else
+ new_pte = (new_pte & ~_PAGE_HPTEFLAGS) | _PAGE_HASHPTE;
+#endif
+ /* Add in WIMG bits */
+ rflags |= (new_pte & (_PAGE_WRITETHRU | _PAGE_NO_CACHE |
+ _PAGE_COHERENT | _PAGE_GUARDED));
+
+ /* Insert into the hash table, primary slot */
+ slot = ppc_md.hpte_insert(hpte_group, va, pa, rflags, 0,
+ mmu_psize, ssize);
+
+ /* Primary is full, try the secondary */
+ if (unlikely(slot == -1)) {
+ hpte_group = ((~hash & htab_hash_mask) *
+ HPTES_PER_GROUP) & ~0x7UL;
+ slot = ppc_md.hpte_insert(hpte_group, va, pa, rflags,
+ HPTE_V_SECONDARY,
+ mmu_psize, ssize);
+ if (slot == -1) {
+ if (mftb() & 0x1)
+ hpte_group = ((hash & htab_hash_mask) *
+ HPTES_PER_GROUP)&~0x7UL;
+
+ ppc_md.hpte_remove(hpte_group);
+ goto repeat;
+ }
+ }
+
+ if (unlikely(slot == -2))
+ panic("hash_huge_page: pte_insert failed\n");
+
+ new_pte |= (slot << 12) & (_PAGE_F_SECOND | _PAGE_F_GIX);
+ }
+
+ /*
+ * No need to use ldarx/stdcx here
+ */
+ *ptep = __pte(new_pte & ~_PAGE_BUSY);
+
+ err = 0;
+
+ out:
+ return err;
+}
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c
index 90df6ffe3a4..123f7070238 100644
--- a/arch/powerpc/mm/hugetlbpage.c
+++ b/arch/powerpc/mm/hugetlbpage.c
@@ -7,29 +7,17 @@
* Copyright (C) 2002, Rohit Seth <rohit.seth@intel.com>
*/
-#include <linux/init.h>
-#include <linux/fs.h>
#include <linux/mm.h>
+#include <linux/io.h>
#include <linux/hugetlb.h>
-#include <linux/pagemap.h>
-#include <linux/slab.h>
-#include <linux/err.h>
-#include <linux/sysctl.h>
-#include <asm/mman.h>
+#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/tlb.h>
-#include <asm/tlbflush.h>
-#include <asm/mmu_context.h>
-#include <asm/machdep.h>
-#include <asm/cputable.h>
-#include <asm/spu.h>
#define PAGE_SHIFT_64K 16
#define PAGE_SHIFT_16M 24
#define PAGE_SHIFT_16G 34
-#define NUM_LOW_AREAS (0x100000000UL >> SID_SHIFT)
-#define NUM_HIGH_AREAS (PGTABLE_RANGE >> HTLB_AREA_SHIFT)
#define MAX_NUMBER_GPAGES 1024
/* Tracks the 16G pages after the device tree is scanned and before the
@@ -37,53 +25,17 @@
static unsigned long gpage_freearray[MAX_NUMBER_GPAGES];
static unsigned nr_gpages;
-/* Array of valid huge page sizes - non-zero value(hugepte_shift) is
- * stored for the huge page sizes that are valid.
- */
-unsigned int mmu_huge_psizes[MMU_PAGE_COUNT] = { }; /* initialize all to 0 */
-
-#define hugepte_shift mmu_huge_psizes
-#define PTRS_PER_HUGEPTE(psize) (1 << hugepte_shift[psize])
-#define HUGEPTE_TABLE_SIZE(psize) (sizeof(pte_t) << hugepte_shift[psize])
-
-#define HUGEPD_SHIFT(psize) (mmu_psize_to_shift(psize) \
- + hugepte_shift[psize])
-#define HUGEPD_SIZE(psize) (1UL << HUGEPD_SHIFT(psize))
-#define HUGEPD_MASK(psize) (~(HUGEPD_SIZE(psize)-1))
-
-/* Subtract one from array size because we don't need a cache for 4K since
- * is not a huge page size */
-#define HUGE_PGTABLE_INDEX(psize) (HUGEPTE_CACHE_NUM + psize - 1)
-#define HUGEPTE_CACHE_NAME(psize) (huge_pgtable_cache_name[psize])
-
-static const char *huge_pgtable_cache_name[MMU_PAGE_COUNT] = {
- [MMU_PAGE_64K] = "hugepte_cache_64K",
- [MMU_PAGE_1M] = "hugepte_cache_1M",
- [MMU_PAGE_16M] = "hugepte_cache_16M",
- [MMU_PAGE_16G] = "hugepte_cache_16G",
-};
-
/* 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. */
-#define HUGEPD_OK 0x1
-
-typedef struct { unsigned long pd; } hugepd_t;
-
-#define hugepd_none(hpd) ((hpd).pd == 0)
static inline int shift_to_mmu_psize(unsigned int shift)
{
- switch (shift) {
-#ifndef CONFIG_PPC_64K_PAGES
- case PAGE_SHIFT_64K:
- return MMU_PAGE_64K;
-#endif
- case PAGE_SHIFT_16M:
- return MMU_PAGE_16M;
- case PAGE_SHIFT_16G:
- return MMU_PAGE_16G;
- }
+ int psize;
+
+ for (psize = 0; psize < MMU_PAGE_COUNT; ++psize)
+ if (mmu_psize_defs[psize].shift == shift)
+ return psize;
return -1;
}
@@ -94,71 +46,126 @@ static inline unsigned int mmu_psize_to_shift(unsigned int mmu_psize)
BUG();
}
+#define hugepd_none(hpd) ((hpd).pd == 0)
+
static inline pte_t *hugepd_page(hugepd_t hpd)
{
- BUG_ON(!(hpd.pd & HUGEPD_OK));
- return (pte_t *)(hpd.pd & ~HUGEPD_OK);
+ 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,
- struct hstate *hstate)
+static inline pte_t *hugepte_offset(hugepd_t *hpdp, unsigned long addr, unsigned pdshift)
{
- unsigned int shift = huge_page_shift(hstate);
- int psize = shift_to_mmu_psize(shift);
- unsigned long idx = ((addr >> shift) & (PTRS_PER_HUGEPTE(psize)-1));
+ 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;
+ pud_t *pu;
+ pmd_t *pm;
+ hugepd_t *hpdp = NULL;
+ unsigned pdshift = PGDIR_SHIFT;
+
+ if (shift)
+ *shift = 0;
+
+ pg = pgdir + pgd_index(ea);
+ if (is_hugepd(pg)) {
+ hpdp = (hugepd_t *)pg;
+ } else if (!pgd_none(*pg)) {
+ pdshift = PUD_SHIFT;
+ pu = pud_offset(pg, ea);
+ if (is_hugepd(pu))
+ hpdp = (hugepd_t *)pu;
+ else if (!pud_none(*pu)) {
+ pdshift = PMD_SHIFT;
+ pm = pmd_offset(pu, ea);
+ if (is_hugepd(pm))
+ hpdp = (hugepd_t *)pm;
+ else if (!pmd_none(*pm)) {
+ return pte_offset_map(pm, ea);
+ }
+ }
+ }
+
+ if (!hpdp)
+ return NULL;
+
+ if (shift)
+ *shift = hugepd_shift(*hpdp);
+ return hugepte_offset(hpdp, ea, pdshift);
+}
+
+pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
+{
+ return find_linux_pte_or_hugepte(mm->pgd, addr, NULL);
+}
+
static int __hugepte_alloc(struct mm_struct *mm, hugepd_t *hpdp,
- unsigned long address, unsigned int psize)
+ unsigned long address, unsigned pdshift, unsigned pshift)
{
- pte_t *new = kmem_cache_zalloc(pgtable_cache[HUGE_PGTABLE_INDEX(psize)],
- GFP_KERNEL|__GFP_REPEAT);
+ pte_t *new = kmem_cache_zalloc(PGT_CACHE(pdshift - pshift),
+ GFP_KERNEL|__GFP_REPEAT);
+
+ BUG_ON(pshift > HUGEPD_SHIFT_MASK);
+ BUG_ON((unsigned long)new & HUGEPD_SHIFT_MASK);
if (! new)
return -ENOMEM;
spin_lock(&mm->page_table_lock);
if (!hugepd_none(*hpdp))
- kmem_cache_free(pgtable_cache[HUGE_PGTABLE_INDEX(psize)], new);
+ kmem_cache_free(PGT_CACHE(pdshift - pshift), new);
else
- hpdp->pd = (unsigned long)new | HUGEPD_OK;
+ hpdp->pd = ((unsigned long)new & ~0x8000000000000000) | pshift;
spin_unlock(&mm->page_table_lock);
return 0;
}
-
-static pud_t *hpud_offset(pgd_t *pgd, unsigned long addr, struct hstate *hstate)
-{
- if (huge_page_shift(hstate) < PUD_SHIFT)
- return pud_offset(pgd, addr);
- else
- return (pud_t *) pgd;
-}
-static pud_t *hpud_alloc(struct mm_struct *mm, pgd_t *pgd, unsigned long addr,
- struct hstate *hstate)
+pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long sz)
{
- if (huge_page_shift(hstate) < PUD_SHIFT)
- return pud_alloc(mm, pgd, addr);
- else
- return (pud_t *) pgd;
-}
-static pmd_t *hpmd_offset(pud_t *pud, unsigned long addr, struct hstate *hstate)
-{
- if (huge_page_shift(hstate) < PMD_SHIFT)
- return pmd_offset(pud, addr);
- else
- return (pmd_t *) pud;
-}
-static pmd_t *hpmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long addr,
- struct hstate *hstate)
-{
- if (huge_page_shift(hstate) < PMD_SHIFT)
- return pmd_alloc(mm, pud, addr);
- else
- return (pmd_t *) pud;
+ pgd_t *pg;
+ pud_t *pu;
+ pmd_t *pm;
+ hugepd_t *hpdp = NULL;
+ unsigned pshift = __ffs(sz);
+ unsigned pdshift = PGDIR_SHIFT;
+
+ addr &= ~(sz-1);
+
+ pg = pgd_offset(mm, addr);
+ if (pshift >= PUD_SHIFT) {
+ hpdp = (hugepd_t *)pg;
+ } else {
+ pdshift = PUD_SHIFT;
+ pu = pud_alloc(mm, pg, addr);
+ if (pshift >= PMD_SHIFT) {
+ hpdp = (hugepd_t *)pu;
+ } else {
+ pdshift = PMD_SHIFT;
+ pm = pmd_alloc(mm, pu, addr);
+ hpdp = (hugepd_t *)pm;
+ }
+ }
+
+ if (!hpdp)
+ return NULL;
+
+ BUG_ON(!hugepd_none(*hpdp) && !hugepd_ok(*hpdp));
+
+ if (hugepd_none(*hpdp) && __hugepte_alloc(mm, hpdp, addr, pdshift, pshift))
+ return NULL;
+
+ return hugepte_offset(hpdp, addr, pdshift);
}
/* Build list of addresses of gigantic pages. This function is used in early
@@ -192,94 +199,38 @@ int alloc_bootmem_huge_page(struct hstate *hstate)
return 1;
}
-
-/* Modelled after find_linux_pte() */
-pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
-{
- pgd_t *pg;
- pud_t *pu;
- pmd_t *pm;
-
- unsigned int psize;
- unsigned int shift;
- unsigned long sz;
- struct hstate *hstate;
- psize = get_slice_psize(mm, addr);
- shift = mmu_psize_to_shift(psize);
- sz = ((1UL) << shift);
- hstate = size_to_hstate(sz);
-
- addr &= hstate->mask;
-
- pg = pgd_offset(mm, addr);
- if (!pgd_none(*pg)) {
- pu = hpud_offset(pg, addr, hstate);
- if (!pud_none(*pu)) {
- pm = hpmd_offset(pu, addr, hstate);
- if (!pmd_none(*pm))
- return hugepte_offset((hugepd_t *)pm, addr,
- hstate);
- }
- }
-
- return NULL;
-}
-
-pte_t *huge_pte_alloc(struct mm_struct *mm,
- unsigned long addr, unsigned long sz)
-{
- pgd_t *pg;
- pud_t *pu;
- pmd_t *pm;
- hugepd_t *hpdp = NULL;
- struct hstate *hstate;
- unsigned int psize;
- hstate = size_to_hstate(sz);
-
- psize = get_slice_psize(mm, addr);
- BUG_ON(!mmu_huge_psizes[psize]);
-
- addr &= hstate->mask;
-
- pg = pgd_offset(mm, addr);
- pu = hpud_alloc(mm, pg, addr, hstate);
-
- if (pu) {
- pm = hpmd_alloc(mm, pu, addr, hstate);
- if (pm)
- hpdp = (hugepd_t *)pm;
- }
-
- if (! hpdp)
- return NULL;
-
- if (hugepd_none(*hpdp) && __hugepte_alloc(mm, hpdp, addr, psize))
- return NULL;
-
- return hugepte_offset(hpdp, addr, hstate);
-}
-
int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
{
return 0;
}
-static void free_hugepte_range(struct mmu_gather *tlb, hugepd_t *hpdp,
- unsigned int psize)
+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);
+ unsigned long pdmask = ~((1UL << pdshift) - 1);
+
+ start &= pdmask;
+ if (start < floor)
+ return;
+ if (ceiling) {
+ ceiling &= pdmask;
+ if (! ceiling)
+ return;
+ }
+ if (end - 1 > ceiling - 1)
+ return;
hpdp->pd = 0;
tlb->need_flush = 1;
- pgtable_free_tlb(tlb, pgtable_free_cache(hugepte,
- HUGEPTE_CACHE_NUM+psize-1,
- PGF_CACHENUM_MASK));
+ pgtable_free_tlb(tlb, hugepte, pdshift - shift);
}
static void hugetlb_free_pmd_range(struct mmu_gather *tlb, pud_t *pud,
unsigned long addr, unsigned long end,
- unsigned long floor, unsigned long ceiling,
- unsigned int psize)
+ unsigned long floor, unsigned long ceiling)
{
pmd_t *pmd;
unsigned long next;
@@ -291,7 +242,8 @@ static void hugetlb_free_pmd_range(struct mmu_gather *tlb, pud_t *pud,
next = pmd_addr_end(addr, end);
if (pmd_none(*pmd))
continue;
- free_hugepte_range(tlb, (hugepd_t *)pmd, psize);
+ free_hugepd_range(tlb, (hugepd_t *)pmd, PMD_SHIFT,
+ addr, next, floor, ceiling);
} while (pmd++, addr = next, addr != end);
start &= PUD_MASK;
@@ -317,23 +269,19 @@ static void hugetlb_free_pud_range(struct mmu_gather *tlb, pgd_t *pgd,
pud_t *pud;
unsigned long next;
unsigned long start;
- unsigned int shift;
- unsigned int psize = get_slice_psize(tlb->mm, addr);
- shift = mmu_psize_to_shift(psize);
start = addr;
pud = pud_offset(pgd, addr);
do {
next = pud_addr_end(addr, end);
- if (shift < PMD_SHIFT) {
+ if (!is_hugepd(pud)) {
if (pud_none_or_clear_bad(pud))
continue;
hugetlb_free_pmd_range(tlb, pud, addr, next, floor,
- ceiling, psize);
+ ceiling);
} else {
- if (pud_none(*pud))
- continue;
- free_hugepte_range(tlb, (hugepd_t *)pud, psize);
+ free_hugepd_range(tlb, (hugepd_t *)pud, PUD_SHIFT,
+ addr, next, floor, ceiling);
}
} while (pud++, addr = next, addr != end);
@@ -364,121 +312,56 @@ void hugetlb_free_pgd_range(struct mmu_gather *tlb,
{
pgd_t *pgd;
unsigned long next;
- unsigned long start;
/*
- * Comments below take from the normal free_pgd_range(). They
- * apply here too. The tests against HUGEPD_MASK below are
- * essential, because we *don't* test for this at the bottom
- * level. Without them we'll attempt to free a hugepte table
- * when we unmap just part of it, even if there are other
- * active mappings using it.
- *
- * The next few lines have given us lots of grief...
- *
- * Why are we testing HUGEPD* at this top level? Because
- * often there will be no work to do at all, and we'd prefer
- * not to go all the way down to the bottom just to discover
- * that.
- *
- * Why all these "- 1"s? Because 0 represents both the bottom
- * of the address space and the top of it (using -1 for the
- * top wouldn't help much: the masks would do the wrong thing).
- * The rule is that addr 0 and floor 0 refer to the bottom of
- * the address space, but end 0 and ceiling 0 refer to the top
- * Comparisons need to use "end - 1" and "ceiling - 1" (though
- * that end 0 case should be mythical).
+ * Because there are a number of different possible pagetable
+ * layouts for hugepage ranges, we limit knowledge of how
+ * things should be laid out to the allocation path
+ * (huge_pte_alloc(), above). Everything else works out the
+ * structure as it goes from information in the hugepd
+ * pointers. That means that we can't here use the
+ * optimization used in the normal page free_pgd_range(), of
+ * checking whether we're actually covering a large enough
+ * range to have to do anything at the top level of the walk
+ * instead of at the bottom.
*
- * Wherever addr is brought up or ceiling brought down, we
- * must be careful to reject "the opposite 0" before it
- * confuses the subsequent tests. But what about where end is
- * brought down by HUGEPD_SIZE below? no, end can't go down to
- * 0 there.
- *
- * Whereas we round start (addr) and ceiling down, by different
- * masks at different levels, in order to test whether a table
- * now has no other vmas using it, so can be freed, we don't
- * bother to round floor or end up - the tests don't need that.
+ * To make sense of this, you should probably go read the big
+ * block comment at the top of the normal free_pgd_range(),
+ * too.
*/
- unsigned int psize = get_slice_psize(tlb->mm, addr);
-
- addr &= HUGEPD_MASK(psize);
- if (addr < floor) {
- addr += HUGEPD_SIZE(psize);
- if (!addr)
- return;
- }
- if (ceiling) {
- ceiling &= HUGEPD_MASK(psize);
- if (!ceiling)
- return;
- }
- if (end - 1 > ceiling - 1)
- end -= HUGEPD_SIZE(psize);
- if (addr > end - 1)
- return;
- start = addr;
pgd = pgd_offset(tlb->mm, addr);
do {
- psize = get_slice_psize(tlb->mm, addr);
- BUG_ON(!mmu_huge_psizes[psize]);
next = pgd_addr_end(addr, end);
- if (mmu_psize_to_shift(psize) < PUD_SHIFT) {
+ if (!is_hugepd(pgd)) {
if (pgd_none_or_clear_bad(pgd))
continue;
hugetlb_free_pud_range(tlb, pgd, addr, next, floor, ceiling);
} else {
- if (pgd_none(*pgd))
- continue;
- free_hugepte_range(tlb, (hugepd_t *)pgd, psize);
+ free_hugepd_range(tlb, (hugepd_t *)pgd, PGDIR_SHIFT,
+ addr, next, floor, ceiling);
}
} while (pgd++, addr = next, addr != end);
}
-void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep, pte_t pte)
-{
- if (pte_present(*ptep)) {
- /* We open-code pte_clear because we need to pass the right
- * argument to hpte_need_flush (huge / !huge). Might not be
- * necessary anymore if we make hpte_need_flush() get the
- * page size from the slices
- */
- unsigned int psize = get_slice_psize(mm, addr);
- unsigned int shift = mmu_psize_to_shift(psize);
- unsigned long sz = ((1UL) << shift);
- struct hstate *hstate = size_to_hstate(sz);
- pte_update(mm, addr & hstate->mask, ptep, ~0UL, 1);
- }
- *ptep = __pte(pte_val(pte) & ~_PAGE_HPTEFLAGS);
-}
-
-pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep)
-{
- unsigned long old = pte_update(mm, addr, ptep, ~0UL, 1);
- return __pte(old);
-}
-
struct page *
follow_huge_addr(struct mm_struct *mm, unsigned long address, int write)
{
pte_t *ptep;
struct page *page;
- unsigned int mmu_psize = get_slice_psize(mm, address);
+ unsigned shift;
+ unsigned long mask;
+
+ ptep = find_linux_pte_or_hugepte(mm->pgd, address, &shift);
/* Verify it is a huge page else bail. */
- if (!mmu_huge_psizes[mmu_psize])
+ if (!ptep || !shift)
return ERR_PTR(-EINVAL);
- ptep = huge_pte_offset(mm, address);
+ mask = (1UL << shift) - 1;
page = pte_page(*ptep);
- if (page) {
- unsigned int shift = mmu_psize_to_shift(mmu_psize);
- unsigned long sz = ((1UL) << shift);
- page += (address % sz) / PAGE_SIZE;
- }
+ if (page)
+ page += (address & mask) / PAGE_SIZE;
return page;
}
@@ -501,6 +384,82 @@ follow_huge_pmd(struct mm_struct *mm, unsigned long address,
return NULL;
}
+static noinline int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr,
+ unsigned long end, int write, struct page **pages, int *nr)
+{
+ unsigned long mask;
+ unsigned long pte_end;
+ struct page *head, *page;
+ pte_t pte;
+ int refs;
+
+ pte_end = (addr + sz) & ~(sz-1);
+ if (pte_end < end)
+ end = pte_end;
+
+ pte = *ptep;
+ mask = _PAGE_PRESENT | _PAGE_USER;
+ if (write)
+ mask |= _PAGE_RW;
+
+ if ((pte_val(pte) & mask) != mask)
+ return 0;
+
+ /* hugepages are never "special" */
+ VM_BUG_ON(!pfn_valid(pte_pfn(pte)));
+
+ refs = 0;
+ head = pte_page(pte);
+
+ page = head + ((addr & (sz-1)) >> PAGE_SHIFT);
+ do {
+ VM_BUG_ON(compound_head(page) != head);
+ pages[*nr] = page;
+ (*nr)++;
+ page++;
+ refs++;
+ } while (addr += PAGE_SIZE, addr != end);
+
+ if (!page_cache_add_speculative(head, refs)) {
+ *nr -= refs;
+ return 0;
+ }
+
+ if (unlikely(pte_val(pte) != pte_val(*ptep))) {
+ /* Could be optimized better */
+ while (*nr) {
+ put_page(page);
+ (*nr)--;
+ }
+ }
+
+ return 1;
+}
+
+static unsigned long hugepte_addr_end(unsigned long addr, unsigned long end,
+ unsigned long sz)
+{
+ unsigned long __boundary = (addr + sz) & ~(sz-1);
+ return (__boundary - 1 < end - 1) ? __boundary : end;
+}
+
+int gup_hugepd(hugepd_t *hugepd, unsigned pdshift,
+ unsigned long addr, unsigned long end,
+ int write, struct page **pages, int *nr)
+{
+ pte_t *ptep;
+ unsigned long sz = 1UL << hugepd_shift(*hugepd);
+ unsigned long next;
+
+ ptep = hugepte_offset(hugepd, addr, pdshift);
+ do {
+ next = hugepte_addr_end(addr, end, sz);
+ if (!gup_hugepte(ptep, sz, addr, end, write, pages, nr))
+ return 0;
+ } while (ptep++, addr = next, addr != end);
+
+ return 1;
+}
unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
unsigned long len, unsigned long pgoff,
@@ -509,8 +468,6 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
struct hstate *hstate = hstate_file(file);
int mmu_psize = shift_to_mmu_psize(huge_page_shift(hstate));
- if (!mmu_huge_psizes[mmu_psize])
- return -EINVAL;
return slice_get_unmapped_area(addr, len, flags, mmu_psize, 1, 0);
}
@@ -521,229 +478,46 @@ unsigned long vma_mmu_pagesize(struct vm_area_struct *vma)
return 1UL << mmu_psize_to_shift(psize);
}
-/*
- * Called by asm hashtable.S for doing lazy icache flush
- */
-static unsigned int hash_huge_page_do_lazy_icache(unsigned long rflags,
- pte_t pte, int trap, unsigned long sz)
+static int __init add_huge_page_size(unsigned long long size)
{
- struct page *page;
- int i;
-
- if (!pfn_valid(pte_pfn(pte)))
- return rflags;
-
- page = pte_page(pte);
-
- /* page is dirty */
- if (!test_bit(PG_arch_1, &page->flags) && !PageReserved(page)) {
- if (trap == 0x400) {
- for (i = 0; i < (sz / PAGE_SIZE); i++)
- __flush_dcache_icache(page_address(page+i));
- set_bit(PG_arch_1, &page->flags);
- } else {
- rflags |= HPTE_R_N;
- }
- }
- return rflags;
-}
+ int shift = __ffs(size);
+ int mmu_psize;
-int hash_huge_page(struct mm_struct *mm, unsigned long access,
- unsigned long ea, unsigned long vsid, int local,
- unsigned long trap)
-{
- pte_t *ptep;
- unsigned long old_pte, new_pte;
- unsigned long va, rflags, pa, sz;
- long slot;
- int err = 1;
- int ssize = user_segment_size(ea);
- unsigned int mmu_psize;
- int shift;
- mmu_psize = get_slice_psize(mm, ea);
-
- if (!mmu_huge_psizes[mmu_psize])
- goto out;
- ptep = huge_pte_offset(mm, ea);
-
- /* Search the Linux page table for a match with va */
- va = hpt_va(ea, vsid, ssize);
+ /* Check that it is a page size supported by the hardware and
+ * that it fits within pagetable and slice limits. */
+ if (!is_power_of_2(size)
+ || (shift > SLICE_HIGH_SHIFT) || (shift <= PAGE_SHIFT))
+ return -EINVAL;
- /*
- * If no pte found or not present, send the problem up to
- * do_page_fault
- */
- if (unlikely(!ptep || pte_none(*ptep)))
- goto out;
+ if ((mmu_psize = shift_to_mmu_psize(shift)) < 0)
+ return -EINVAL;
- /*
- * Check the user's access rights to the page. If access should be
- * prevented then send the problem up to do_page_fault.
+#ifdef CONFIG_SPU_FS_64K_LS
+ /* Disable support for 64K huge pages when 64K SPU local store
+ * support is enabled as the current implementation conflicts.
*/
- if (unlikely(access & ~pte_val(*ptep)))
- goto out;
- /*
- * At this point, we have a pte (old_pte) which can be used to build
- * or update an HPTE. There are 2 cases:
- *
- * 1. There is a valid (present) pte with no associated HPTE (this is
- * the most common case)
- * 2. There is a valid (present) pte with an associated HPTE. The
- * current values of the pp bits in the HPTE prevent access
- * because we are doing software DIRTY bit management and the
- * page is currently not DIRTY.
- */
-
-
- do {
- old_pte = pte_val(*ptep);
- if (old_pte & _PAGE_BUSY)
- goto out;
- new_pte = old_pte | _PAGE_BUSY | _PAGE_ACCESSED;
- } while(old_pte != __cmpxchg_u64((unsigned long *)ptep,
- old_pte, new_pte));
-
- rflags = 0x2 | (!(new_pte & _PAGE_RW));
- /* _PAGE_EXEC -> HW_NO_EXEC since it's inverted */
- rflags |= ((new_pte & _PAGE_EXEC) ? 0 : HPTE_R_N);
- shift = mmu_psize_to_shift(mmu_psize);
- sz = ((1UL) << shift);
- if (!cpu_has_feature(CPU_FTR_COHERENT_ICACHE))
- /* No CPU has hugepages but lacks no execute, so we
- * don't need to worry about that case */
- rflags = hash_huge_page_do_lazy_icache(rflags, __pte(old_pte),
- trap, sz);
-
- /* Check if pte already has an hpte (case 2) */
- if (unlikely(old_pte & _PAGE_HASHPTE)) {
- /* There MIGHT be an HPTE for this pte */
- unsigned long hash, slot;
-
- hash = hpt_hash(va, shift, ssize);
- if (old_pte & _PAGE_F_SECOND)
- hash = ~hash;
- slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
- slot += (old_pte & _PAGE_F_GIX) >> 12;
-
- if (ppc_md.hpte_updatepp(slot, rflags, va, mmu_psize,
- ssize, local) == -1)
- old_pte &= ~_PAGE_HPTEFLAGS;
- }
-
- if (likely(!(old_pte & _PAGE_HASHPTE))) {
- unsigned long hash = hpt_hash(va, shift, ssize);
- unsigned long hpte_group;
-
- pa = pte_pfn(__pte(old_pte)) << PAGE_SHIFT;
-
-repeat:
- hpte_group = ((hash & htab_hash_mask) *
- HPTES_PER_GROUP) & ~0x7UL;
-
- /* clear HPTE slot informations in new PTE */
-#ifdef CONFIG_PPC_64K_PAGES
- new_pte = (new_pte & ~_PAGE_HPTEFLAGS) | _PAGE_HPTE_SUB0;
-#else
- new_pte = (new_pte & ~_PAGE_HPTEFLAGS) | _PAGE_HASHPTE;
-#endif
- /* Add in WIMG bits */
- rflags |= (new_pte & (_PAGE_WRITETHRU | _PAGE_NO_CACHE |
- _PAGE_COHERENT | _PAGE_GUARDED));
-
- /* Insert into the hash table, primary slot */
- slot = ppc_md.hpte_insert(hpte_group, va, pa, rflags, 0,
- mmu_psize, ssize);
-
- /* Primary is full, try the secondary */
- if (unlikely(slot == -1)) {
- hpte_group = ((~hash & htab_hash_mask) *
- HPTES_PER_GROUP) & ~0x7UL;
- slot = ppc_md.hpte_insert(hpte_group, va, pa, rflags,
- HPTE_V_SECONDARY,
- mmu_psize, ssize);
- if (slot == -1) {
- if (mftb() & 0x1)
- hpte_group = ((hash & htab_hash_mask) *
- HPTES_PER_GROUP)&~0x7UL;
-
- ppc_md.hpte_remove(hpte_group);
- goto repeat;
- }
- }
-
- if (unlikely(slot == -2))
- panic("hash_huge_page: pte_insert failed\n");
-
- new_pte |= (slot << 12) & (_PAGE_F_SECOND | _PAGE_F_GIX);
- }
+ if (shift == PAGE_SHIFT_64K)
+ return -EINVAL;
+#endif /* CONFIG_SPU_FS_64K_LS */
- /*
- * No need to use ldarx/stdcx here
- */
- *ptep = __pte(new_pte & ~_PAGE_BUSY);
+ BUG_ON(mmu_psize_defs[mmu_psize].shift != shift);
- err = 0;
+ /* Return if huge page size has already been setup */
+ if (size_to_hstate(size))
+ return 0;
- out:
- return err;
-}
+ hugetlb_add_hstate(shift - PAGE_SHIFT);
-static void __init set_huge_psize(int psize)
-{
- /* Check that it is a page size supported by the hardware and
- * that it fits within pagetable limits. */
- if (mmu_psize_defs[psize].shift &&
- mmu_psize_defs[psize].shift < SID_SHIFT_1T &&
- (mmu_psize_defs[psize].shift > MIN_HUGEPTE_SHIFT ||
- mmu_psize_defs[psize].shift == PAGE_SHIFT_64K ||
- mmu_psize_defs[psize].shift == PAGE_SHIFT_16G)) {
- /* Return if huge page size has already been setup or is the
- * same as the base page size. */
- if (mmu_huge_psizes[psize] ||
- mmu_psize_defs[psize].shift == PAGE_SHIFT)
- return;
- if (WARN_ON(HUGEPTE_CACHE_NAME(psize) == NULL))
- return;
- hugetlb_add_hstate(mmu_psize_defs[psize].shift - PAGE_SHIFT);
-
- switch (mmu_psize_defs[psize].shift) {
- case PAGE_SHIFT_64K:
- /* We only allow 64k hpages with 4k base page,
- * which was checked above, and always put them
- * at the PMD */
- hugepte_shift[psize] = PMD_SHIFT;
- break;
- case PAGE_SHIFT_16M:
- /* 16M pages can be at two different levels
- * of pagestables based on base page size */
- if (PAGE_SHIFT == PAGE_SHIFT_64K)
- hugepte_shift[psize] = PMD_SHIFT;
- else /* 4k base page */
- hugepte_shift[psize] = PUD_SHIFT;
- break;
- case PAGE_SHIFT_16G:
- /* 16G pages are always at PGD level */
- hugepte_shift[psize] = PGDIR_SHIFT;
- break;
- }
- hugepte_shift[psize] -= mmu_psize_defs[psize].shift;
- } else
- hugepte_shift[psize] = 0;
+ return 0;
}
static int __init hugepage_setup_sz(char *str)
{
unsigned long long size;
- int mmu_psize;
- int shift;
size = memparse(str, &str);
- shift = __ffs(size);
- mmu_psize = shift_to_mmu_psize(shift);
- if (mmu_psize >= 0 && mmu_psize_defs[mmu_psize].shift)
- set_huge_psize(mmu_psize);
- else
+ if (add_huge_page_size(size) != 0)
printk(KERN_WARNING "Invalid huge page size specified(%llu)\n", size);
return 1;
@@ -752,41 +526,55 @@ __setup("hugepagesz=", hugepage_setup_sz);
static int __init hugetlbpage_init(void)
{
- unsigned int psize;
+ int psize;
if (!cpu_has_feature(CPU_FTR_16M_PAGE))
return -ENODEV;
- /* Add supported huge page sizes. Need to change HUGE_MAX_HSTATE
- * and adjust PTE_NONCACHE_NUM if the number of supported huge page
- * sizes changes.
- */
- set_huge_psize(MMU_PAGE_16M);
- set_huge_psize(MMU_PAGE_16G);
+ for (psize = 0; psize < MMU_PAGE_COUNT; ++psize) {
+ unsigned shift;
+ unsigned pdshift;
- /* Temporarily disable support for 64K huge pages when 64K SPU local
- * store support is enabled as the current implementation conflicts.
- */
-#ifndef CONFIG_SPU_FS_64K_LS
- set_huge_psize(MMU_PAGE_64K);
-#endif
+ if (!mmu_psize_defs[psize].shift)
+ continue;
- for (psize = 0; psize < MMU_PAGE_COUNT; ++psize) {
- if (mmu_huge_psizes[psize]) {
- pgtable_cache[HUGE_PGTABLE_INDEX(psize)] =
- kmem_cache_create(
- HUGEPTE_CACHE_NAME(psize),
- HUGEPTE_TABLE_SIZE(psize),
- HUGEPTE_TABLE_SIZE(psize),
- 0,
- NULL);
- if (!pgtable_cache[HUGE_PGTABLE_INDEX(psize)])
- panic("hugetlbpage_init(): could not create %s"\
- "\n", HUGEPTE_CACHE_NAME(psize));
- }
+ shift = mmu_psize_to_shift(psize);
+
+ if (add_huge_page_size(1ULL << shift) < 0)
+ continue;
+
+ if (shift < PMD_SHIFT)
+ pdshift = PMD_SHIFT;
+ else if (shift < PUD_SHIFT)
+ pdshift = PUD_SHIFT;
+ else
+ pdshift = PGDIR_SHIFT;
+
+ pgtable_cache_add(pdshift - shift, NULL);
+ if (!PGT_CACHE(pdshift - shift))
+ panic("hugetlbpage_init(): could not create "
+ "pgtable cache for %d bit pagesize\n", shift);
}
+ /* Set default large page size. Currently, we pick 16M or 1M
+ * depending on what is available
+ */
+ if (mmu_psize_defs[MMU_PAGE_16M].shift)
+ HPAGE_SHIFT = mmu_psize_defs[MMU_PAGE_16M].shift;
+ else if (mmu_psize_defs[MMU_PAGE_1M].shift)
+ HPAGE_SHIFT = mmu_psize_defs[MMU_PAGE_1M].shift;
+
return 0;
}
module_init(hugetlbpage_init);
+
+void flush_dcache_icache_hugepage(struct page *page)
+{
+ int i;
+
+ BUG_ON(!PageCompound(page));
+
+ for (i = 0; i < (1UL << compound_order(page)); i++)
+ __flush_dcache_icache(page_address(page+i));
+}
diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c
index 9ddcfb4dc13..4ec900af332 100644
--- a/arch/powerpc/mm/init_32.c
+++ b/arch/powerpc/mm/init_32.c
@@ -82,6 +82,11 @@ extern struct task_struct *current_set[NR_CPUS];
int __map_without_bats;
int __map_without_ltlbs;
+/*
+ * This tells the system to allow ioremapping memory marked as reserved.
+ */
+int __allow_ioremap_reserved;
+
/* max amount of low RAM to map in */
unsigned long __max_low_memory = MAX_LOW_MEM;
@@ -131,9 +136,13 @@ void __init MMU_init(void)
MMU_setup();
if (lmb.memory.cnt > 1) {
+#ifndef CONFIG_WII
lmb.memory.cnt = 1;
lmb_analyze();
printk(KERN_WARNING "Only using first contiguous memory region");
+#else
+ wii_memory_fixups();
+#endif
}
total_lowmem = total_memory = lmb_end_of_DRAM() - memstart_addr;
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c
index 335c578b9cc..776f28d02b6 100644
--- a/arch/powerpc/mm/init_64.c
+++ b/arch/powerpc/mm/init_64.c
@@ -41,6 +41,7 @@
#include <linux/module.h>
#include <linux/poison.h>
#include <linux/lmb.h>
+#include <linux/hugetlb.h>
#include <asm/pgalloc.h>
#include <asm/page.h>
@@ -119,30 +120,63 @@ static void pmd_ctor(void *addr)
memset(addr, 0, PMD_TABLE_SIZE);
}
-static const unsigned int pgtable_cache_size[2] = {
- PGD_TABLE_SIZE, PMD_TABLE_SIZE
-};
-static const char *pgtable_cache_name[ARRAY_SIZE(pgtable_cache_size)] = {
-#ifdef CONFIG_PPC_64K_PAGES
- "pgd_cache", "pmd_cache",
-#else
- "pgd_cache", "pud_pmd_cache",
-#endif /* CONFIG_PPC_64K_PAGES */
-};
-
-#ifdef CONFIG_HUGETLB_PAGE
-/* Hugepages need an extra cache per hugepagesize, initialized in
- * hugetlbpage.c. We can't put into the tables above, because HPAGE_SHIFT
- * is not compile time constant. */
-struct kmem_cache *pgtable_cache[ARRAY_SIZE(pgtable_cache_size)+MMU_PAGE_COUNT];
-#else
-struct kmem_cache *pgtable_cache[ARRAY_SIZE(pgtable_cache_size)];
-#endif
+struct kmem_cache *pgtable_cache[MAX_PGTABLE_INDEX_SIZE];
+
+/*
+ * Create a kmem_cache() for pagetables. This is not used for PTE
+ * pages - they're linked to struct page, come from the normal free
+ * pages pool and have a different entry size (see real_pte_t) to
+ * everything else. Caches created by this function are used for all
+ * the higher level pagetables, and for hugepage pagetables.
+ */
+void pgtable_cache_add(unsigned shift, void (*ctor)(void *))
+{
+ char *name;
+ unsigned long table_size = sizeof(void *) << shift;
+ unsigned long align = table_size;
+
+ /* When batching pgtable pointers for RCU freeing, we store
+ * the index size in the low bits. Table alignment must be
+ * big enough to fit it.
+ *
+ * Likewise, hugeapge pagetable pointers contain a (different)
+ * shift value in the low bits. All tables must be aligned so
+ * as to leave enough 0 bits in the address to contain it. */
+ unsigned long minalign = max(MAX_PGTABLE_INDEX_SIZE + 1,
+ HUGEPD_SHIFT_MASK + 1);
+ struct kmem_cache *new;
+
+ /* It would be nice if this was a BUILD_BUG_ON(), but at the
+ * moment, gcc doesn't seem to recognize is_power_of_2 as a
+ * constant expression, so so much for that. */
+ BUG_ON(!is_power_of_2(minalign));
+ BUG_ON((shift < 1) || (shift > MAX_PGTABLE_INDEX_SIZE));
+
+ if (PGT_CACHE(shift))
+ return; /* Already have a cache of this size */
+
+ align = max_t(unsigned long, align, minalign);
+ name = kasprintf(GFP_KERNEL, "pgtable-2^%d", shift);
+ new = kmem_cache_create(name, table_size, align, 0, ctor);
+ PGT_CACHE(shift) = new;
+
+ pr_debug("Allocated pgtable cache for order %d\n", shift);
+}
+
void pgtable_cache_init(void)
{
- pgtable_cache[0] = kmem_cache_create(pgtable_cache_name[0], PGD_TABLE_SIZE, PGD_TABLE_SIZE, SLAB_PANIC, pgd_ctor);
- pgtable_cache[1] = kmem_cache_create(pgtable_cache_name[1], PMD_TABLE_SIZE, PMD_TABLE_SIZE, SLAB_PANIC, pmd_ctor);
+ pgtable_cache_add(PGD_INDEX_SIZE, pgd_ctor);
+ pgtable_cache_add(PMD_INDEX_SIZE, pmd_ctor);
+ if (!PGT_CACHE(PGD_INDEX_SIZE) || !PGT_CACHE(PMD_INDEX_SIZE))
+ panic("Couldn't allocate pgtable caches");
+
+ /* In all current configs, when the PUD index exists it's the
+ * same size as either the pgd or pmd index. Verify that the
+ * initialization above has also created a PUD cache. This
+ * will need re-examiniation if we add new possibilities for
+ * the pagetable layout. */
+ BUG_ON(PUD_INDEX_SIZE && !PGT_CACHE(PUD_INDEX_SIZE));
}
#ifdef CONFIG_SPARSEMEM_VMEMMAP
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 59736317bf0..b9b152558f9 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -32,6 +32,7 @@
#include <linux/pagemap.h>
#include <linux/suspend.h>
#include <linux/lmb.h>
+#include <linux/hugetlb.h>
#include <asm/pgalloc.h>
#include <asm/prom.h>
@@ -417,18 +418,26 @@ EXPORT_SYMBOL(flush_dcache_page);
void flush_dcache_icache_page(struct page *page)
{
+#ifdef CONFIG_HUGETLB_PAGE
+ if (PageCompound(page)) {
+ flush_dcache_icache_hugepage(page);
+ return;
+ }
+#endif
#ifdef CONFIG_BOOKE
- void *start = kmap_atomic(page, KM_PPC_SYNC_ICACHE);
- __flush_dcache_icache(start);
- kunmap_atomic(start, KM_PPC_SYNC_ICACHE);
+ {
+ void *start = kmap_atomic(page, KM_PPC_SYNC_ICACHE);
+ __flush_dcache_icache(start);
+ kunmap_atomic(start, KM_PPC_SYNC_ICACHE);
+ }
#elif defined(CONFIG_8xx) || defined(CONFIG_PPC64)
/* On 8xx there is no need to kmap since highmem is not supported */
__flush_dcache_icache(page_address(page));
#else
__flush_dcache_icache_phys(page_to_pfn(page) << PAGE_SHIFT);
#endif
-
}
+
void clear_user_page(void *page, unsigned long vaddr, struct page *pg)
{
clear_page(page);
diff --git a/arch/powerpc/mm/mmu_context_hash64.c b/arch/powerpc/mm/mmu_context_hash64.c
index dbeb86ac90c..b910d37aea1 100644
--- a/arch/powerpc/mm/mmu_context_hash64.c
+++ b/arch/powerpc/mm/mmu_context_hash64.c
@@ -18,6 +18,7 @@
#include <linux/mm.h>
#include <linux/spinlock.h>
#include <linux/idr.h>
+#include <linux/module.h>
#include <asm/mmu_context.h>
@@ -32,7 +33,7 @@ static DEFINE_IDR(mmu_context_idr);
#define NO_CONTEXT 0
#define MAX_CONTEXT ((1UL << 19) - 1)
-int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
+int __init_new_context(void)
{
int index;
int err;
@@ -57,22 +58,41 @@ again:
return -ENOMEM;
}
+ return index;
+}
+EXPORT_SYMBOL_GPL(__init_new_context);
+
+int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
+{
+ int index;
+
+ index = __init_new_context();
+ if (index < 0)
+ return index;
+
/* The old code would re-promote on fork, we don't do that
* when using slices as it could cause problem promoting slices
* that have been forced down to 4K
*/
if (slice_mm_new_context(mm))
slice_set_user_psize(mm, mmu_virtual_psize);
+ subpage_prot_init_new_context(mm);
mm->context.id = index;
return 0;
}
-void destroy_context(struct mm_struct *mm)
+void __destroy_context(int context_id)
{
spin_lock(&mmu_context_lock);
- idr_remove(&mmu_context_idr, mm->context.id);
+ idr_remove(&mmu_context_idr, context_id);
spin_unlock(&mmu_context_lock);
+}
+EXPORT_SYMBOL_GPL(__destroy_context);
+void destroy_context(struct mm_struct *mm)
+{
+ __destroy_context(mm->context.id);
+ subpage_prot_free(mm);
mm->context.id = NO_CONTEXT;
}
diff --git a/arch/powerpc/mm/mmu_decl.h b/arch/powerpc/mm/mmu_decl.h
index d2e5321d5ea..d49a77503e1 100644
--- a/arch/powerpc/mm/mmu_decl.h
+++ b/arch/powerpc/mm/mmu_decl.h
@@ -98,23 +98,13 @@ extern void _tlbia(void);
#ifdef CONFIG_PPC32
-struct tlbcam {
- u32 MAS0;
- u32 MAS1;
- u32 MAS2;
- u32 MAS3;
- u32 MAS7;
-};
-
extern void mapin_ram(void);
extern int map_page(unsigned long va, phys_addr_t pa, int flags);
extern void setbat(int index, unsigned long virt, phys_addr_t phys,
unsigned int size, int flags);
-extern void settlbcam(int index, unsigned long virt, phys_addr_t phys,
- unsigned int size, int flags, unsigned int pid);
-extern void invalidate_tlbcam_entry(int index);
extern int __map_without_bats;
+extern int __allow_ioremap_reserved;
extern unsigned long ioremap_base;
extern unsigned int rtas_data, rtas_size;
@@ -136,24 +126,32 @@ extern phys_addr_t total_lowmem;
extern phys_addr_t memstart_addr;
extern phys_addr_t lowmem_end_addr;
+#ifdef CONFIG_WII
+extern unsigned long wii_hole_start;
+extern unsigned long wii_hole_size;
+
+extern unsigned long wii_mmu_mapin_mem2(unsigned long top);
+extern void wii_memory_fixups(void);
+#endif
+
/* ...and now those things that may be slightly different between processor
* architectures. -- Dan
*/
#if defined(CONFIG_8xx)
#define MMU_init_hw() do { } while(0)
-#define mmu_mapin_ram() (0UL)
+#define mmu_mapin_ram(top) (0UL)
#elif defined(CONFIG_4xx)
extern void MMU_init_hw(void);
-extern unsigned long mmu_mapin_ram(void);
+extern unsigned long mmu_mapin_ram(unsigned long top);
#elif defined(CONFIG_FSL_BOOKE)
extern void MMU_init_hw(void);
-extern unsigned long mmu_mapin_ram(void);
+extern unsigned long mmu_mapin_ram(unsigned long top);
extern void adjust_total_lowmem(void);
#elif defined(CONFIG_PPC32)
/* anything 32-bit except 4xx or 8xx */
extern void MMU_init_hw(void);
-extern unsigned long mmu_mapin_ram(void);
+extern unsigned long mmu_mapin_ram(unsigned long top);
#endif
diff --git a/arch/powerpc/mm/pgtable.c b/arch/powerpc/mm/pgtable.c
index 53040931de3..99df697c601 100644
--- a/arch/powerpc/mm/pgtable.c
+++ b/arch/powerpc/mm/pgtable.c
@@ -49,12 +49,12 @@ struct pte_freelist_batch
{
struct rcu_head rcu;
unsigned int index;
- pgtable_free_t tables[0];
+ unsigned long tables[0];
};
#define PTE_FREELIST_SIZE \
((PAGE_SIZE - sizeof(struct pte_freelist_batch)) \
- / sizeof(pgtable_free_t))
+ / sizeof(unsigned long))
static void pte_free_smp_sync(void *arg)
{
@@ -64,13 +64,13 @@ static void pte_free_smp_sync(void *arg)
/* This is only called when we are critically out of memory
* (and fail to get a page in pte_free_tlb).
*/
-static void pgtable_free_now(pgtable_free_t pgf)
+static void pgtable_free_now(void *table, unsigned shift)
{
pte_freelist_forced_free++;
smp_call_function(pte_free_smp_sync, NULL, 1);
- pgtable_free(pgf);
+ pgtable_free(table, shift);
}
static void pte_free_rcu_callback(struct rcu_head *head)
@@ -79,8 +79,12 @@ static void pte_free_rcu_callback(struct rcu_head *head)
container_of(head, struct pte_freelist_batch, rcu);
unsigned int i;
- for (i = 0; i < batch->index; i++)
- pgtable_free(batch->tables[i]);
+ for (i = 0; i < batch->index; i++) {
+ void *table = (void *)(batch->tables[i] & ~MAX_PGTABLE_INDEX_SIZE);
+ unsigned shift = batch->tables[i] & MAX_PGTABLE_INDEX_SIZE;
+
+ pgtable_free(table, shift);
+ }
free_page((unsigned long)batch);
}
@@ -91,25 +95,28 @@ static void pte_free_submit(struct pte_freelist_batch *batch)
call_rcu(&batch->rcu, pte_free_rcu_callback);
}
-void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf)
+void pgtable_free_tlb(struct mmu_gather *tlb, void *table, unsigned shift)
{
/* This is safe since tlb_gather_mmu has disabled preemption */
struct pte_freelist_batch **batchp = &__get_cpu_var(pte_freelist_cur);
+ unsigned long pgf;
if (atomic_read(&tlb->mm->mm_users) < 2 ||
cpumask_equal(mm_cpumask(tlb->mm), cpumask_of(smp_processor_id()))){
- pgtable_free(pgf);
+ pgtable_free(table, shift);
return;
}
if (*batchp == NULL) {
*batchp = (struct pte_freelist_batch *)__get_free_page(GFP_ATOMIC);
if (*batchp == NULL) {
- pgtable_free_now(pgf);
+ pgtable_free_now(table, shift);
return;
}
(*batchp)->index = 0;
}
+ BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
+ pgf = (unsigned long)table | shift;
(*batchp)->tables[(*batchp)->index++] = pgf;
if ((*batchp)->index == PTE_FREELIST_SIZE) {
pte_free_submit(*batchp);
diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index cb96cb2e17c..177e4038b43 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -26,6 +26,7 @@
#include <linux/vmalloc.h>
#include <linux/init.h>
#include <linux/highmem.h>
+#include <linux/lmb.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
@@ -191,7 +192,8 @@ __ioremap_caller(phys_addr_t addr, unsigned long size, unsigned long flags,
* Don't allow anybody to remap normal RAM that we're using.
* mem_init() sets high_memory so only do the check after that.
*/
- if (mem_init_done && (p < virt_to_phys(high_memory))) {
+ if (mem_init_done && (p < virt_to_phys(high_memory)) &&
+ !(__allow_ioremap_reserved && lmb_is_region_reserved(p, size))) {
printk("__ioremap(): phys addr 0x%llx is RAM lr %p\n",
(unsigned long long)p, __builtin_return_address(0));
return NULL;
@@ -283,18 +285,18 @@ int map_page(unsigned long va, phys_addr_t pa, int flags)
}
/*
- * Map in a big chunk of physical memory starting at PAGE_OFFSET.
+ * Map in a chunk of physical memory starting at start.
*/
-void __init mapin_ram(void)
+void __init __mapin_ram_chunk(unsigned long offset, unsigned long top)
{
unsigned long v, s, f;
phys_addr_t p;
int ktext;
- s = mmu_mapin_ram();
+ s = offset;
v = PAGE_OFFSET + s;
p = memstart_addr + s;
- for (; s < total_lowmem; s += PAGE_SIZE) {
+ for (; s < top; s += PAGE_SIZE) {
ktext = ((char *) v >= _stext && (char *) v < etext);
f = ktext ? PAGE_KERNEL_TEXT : PAGE_KERNEL;
map_page(v, p, f);
@@ -307,6 +309,30 @@ void __init mapin_ram(void)
}
}
+void __init mapin_ram(void)
+{
+ unsigned long s, top;
+
+#ifndef CONFIG_WII
+ top = total_lowmem;
+ s = mmu_mapin_ram(top);
+ __mapin_ram_chunk(s, top);
+#else
+ if (!wii_hole_size) {
+ s = mmu_mapin_ram(total_lowmem);
+ __mapin_ram_chunk(s, total_lowmem);
+ } else {
+ top = wii_hole_start;
+ s = mmu_mapin_ram(top);
+ __mapin_ram_chunk(s, top);
+
+ top = lmb_end_of_DRAM();
+ s = wii_mmu_mapin_mem2(top);
+ __mapin_ram_chunk(s, top);
+ }
+#endif
+}
+
/* Scan the real Linux page tables and return a PTE pointer for
* a virtual address in a context.
* Returns true (1) if PTE was found, zero otherwise. The pointer to
diff --git a/arch/powerpc/mm/ppc_mmu_32.c b/arch/powerpc/mm/ppc_mmu_32.c
index 2d2a87e1015..f11c2cdcb0f 100644
--- a/arch/powerpc/mm/ppc_mmu_32.c
+++ b/arch/powerpc/mm/ppc_mmu_32.c
@@ -72,7 +72,7 @@ unsigned long p_mapped_by_bats(phys_addr_t pa)
return 0;
}
-unsigned long __init mmu_mapin_ram(void)
+unsigned long __init mmu_mapin_ram(unsigned long top)
{
unsigned long tot, bl, done;
unsigned long max_size = (256<<20);
@@ -86,7 +86,7 @@ unsigned long __init mmu_mapin_ram(void)
/* Make sure we don't map a block larger than the
smallest alignment of the physical address. */
- tot = total_lowmem;
+ tot = top;
for (bl = 128<<10; bl < max_size; bl <<= 1) {
if (bl * 2 > tot)
break;
diff --git a/arch/powerpc/mm/subpage-prot.c b/arch/powerpc/mm/subpage-prot.c
index 4cafc0c33d0..a040b81e93b 100644
--- a/arch/powerpc/mm/subpage-prot.c
+++ b/arch/powerpc/mm/subpage-prot.c
@@ -24,9 +24,9 @@
* Also makes sure that the subpage_prot_table structure is
* reinitialized for the next user.
*/
-void subpage_prot_free(pgd_t *pgd)
+void subpage_prot_free(struct mm_struct *mm)
{
- struct subpage_prot_table *spt = pgd_subpage_prot(pgd);
+ struct subpage_prot_table *spt = &mm->context.spt;
unsigned long i, j, addr;
u32 **p;
@@ -51,6 +51,13 @@ void subpage_prot_free(pgd_t *pgd)
spt->maxaddr = 0;
}
+void subpage_prot_init_new_context(struct mm_struct *mm)
+{
+ struct subpage_prot_table *spt = &mm->context.spt;
+
+ memset(spt, 0, sizeof(*spt));
+}
+
static void hpte_flush_range(struct mm_struct *mm, unsigned long addr,
int npages)
{
@@ -87,7 +94,7 @@ static void hpte_flush_range(struct mm_struct *mm, unsigned long addr,
static void subpage_prot_clear(unsigned long addr, unsigned long len)
{
struct mm_struct *mm = current->mm;
- struct subpage_prot_table *spt = pgd_subpage_prot(mm->pgd);
+ struct subpage_prot_table *spt = &mm->context.spt;
u32 **spm, *spp;
int i, nw;
unsigned long next, limit;
@@ -136,7 +143,7 @@ static void subpage_prot_clear(unsigned long addr, unsigned long len)
long sys_subpage_prot(unsigned long addr, unsigned long len, u32 __user *map)
{
struct mm_struct *mm = current->mm;
- struct subpage_prot_table *spt = pgd_subpage_prot(mm->pgd);
+ struct subpage_prot_table *spt = &mm->context.spt;
u32 **spm, *spp;
int i, nw;
unsigned long next, limit;
diff --git a/arch/powerpc/mm/tlb_hash64.c b/arch/powerpc/mm/tlb_hash64.c
index 2b2f35f6985..282d9306361 100644
--- a/arch/powerpc/mm/tlb_hash64.c
+++ b/arch/powerpc/mm/tlb_hash64.c
@@ -53,11 +53,6 @@ void hpte_need_flush(struct mm_struct *mm, unsigned long addr,
i = batch->index;
- /* We mask the address for the base page size. Huge pages will
- * have applied their own masking already
- */
- addr &= PAGE_MASK;
-
/* Get page size (maybe move back to caller).
*
* NOTE: when using special 64K mappings in 4K environment like
@@ -75,6 +70,9 @@ void hpte_need_flush(struct mm_struct *mm, unsigned long addr,
} else
psize = pte_pagesize_index(mm, addr, pte);
+ /* Mask the address for the correct page size */
+ addr &= ~((1UL << mmu_psize_defs[psize].shift) - 1);
+
/* Build full vaddr */
if (!is_kernel_addr(addr)) {
ssize = user_segment_size(addr);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-21 01:39:45 +0000