summaryrefslogtreecommitdiff
path: root/arch/x86
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/Kconfig5
-rw-r--r--arch/x86/include/asm/atomic.h24
-rw-r--r--arch/x86/include/asm/hugetlb.h4
-rw-r--r--arch/x86/include/asm/pgtable.h11
-rw-r--r--arch/x86/include/asm/pgtable_32.h1
-rw-r--r--arch/x86/include/asm/pgtable_64.h1
-rw-r--r--arch/x86/mm/fault.c1
-rw-r--r--arch/x86/mm/hugetlbpage.c3
-rw-r--r--arch/x86/mm/pat.c87
-rw-r--r--arch/x86/mm/pat_rbtree.c34
-rw-r--r--arch/x86/xen/mmu.c3
11 files changed, 98 insertions, 76 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index b72777ff32a9..1ae94bcae5d9 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -10,6 +10,7 @@ config X86_32
def_bool y
depends on !64BIT
select CLKSRC_I8253
+ select HAVE_UID16
config X86_64
def_bool y
@@ -46,6 +47,7 @@ config X86
select HAVE_FUNCTION_GRAPH_FP_TEST
select HAVE_FUNCTION_TRACE_MCOUNT_TEST
select HAVE_SYSCALL_TRACEPOINTS
+ select SYSCTL_EXCEPTION_TRACE
select HAVE_KVM
select HAVE_ARCH_KGDB
select HAVE_ARCH_TRACEHOOK
@@ -65,6 +67,7 @@ config X86
select HAVE_PERF_EVENTS_NMI
select HAVE_PERF_REGS
select HAVE_PERF_USER_STACK_DUMP
+ select HAVE_DEBUG_KMEMLEAK
select ANON_INODES
select HAVE_ALIGNED_STRUCT_PAGE if SLUB && !M386
select HAVE_CMPXCHG_LOCAL if !M386
@@ -85,6 +88,7 @@ config X86
select IRQ_FORCED_THREADING
select USE_GENERIC_SMP_HELPERS if SMP
select HAVE_BPF_JIT if X86_64
+ select HAVE_ARCH_TRANSPARENT_HUGEPAGE
select CLKEVT_I8253
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select GENERIC_IOMAP
@@ -2168,6 +2172,7 @@ config IA32_EMULATION
bool "IA32 Emulation"
depends on X86_64
select COMPAT_BINFMT_ELF
+ select HAVE_UID16
---help---
Include code to run legacy 32-bit programs under a
64-bit kernel. You should likely turn this on, unless you're
diff --git a/arch/x86/include/asm/atomic.h b/arch/x86/include/asm/atomic.h
index 250b8774c158..b6c3b821acf6 100644
--- a/arch/x86/include/asm/atomic.h
+++ b/arch/x86/include/asm/atomic.h
@@ -240,30 +240,6 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u)
return c;
}
-
-/*
- * atomic_dec_if_positive - decrement by 1 if old value positive
- * @v: pointer of type atomic_t
- *
- * The function returns the old value of *v minus 1, even if
- * the atomic variable, v, was not decremented.
- */
-static inline int atomic_dec_if_positive(atomic_t *v)
-{
- int c, old, dec;
- c = atomic_read(v);
- for (;;) {
- dec = c - 1;
- if (unlikely(dec < 0))
- break;
- old = atomic_cmpxchg((v), c, dec);
- if (likely(old == c))
- break;
- c = old;
- }
- return dec;
-}
-
/**
* atomic_inc_short - increment of a short integer
* @v: pointer to type int
diff --git a/arch/x86/include/asm/hugetlb.h b/arch/x86/include/asm/hugetlb.h
index 439a9acc132d..bdd35dbd0605 100644
--- a/arch/x86/include/asm/hugetlb.h
+++ b/arch/x86/include/asm/hugetlb.h
@@ -90,4 +90,8 @@ static inline void arch_release_hugepage(struct page *page)
{
}
+static inline void arch_clear_hugepage_flags(struct page *page)
+{
+}
+
#endif /* _ASM_X86_HUGETLB_H */
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index fc9948465293..a1f780d45f76 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -146,8 +146,7 @@ static inline unsigned long pmd_pfn(pmd_t pmd)
static inline int pmd_large(pmd_t pte)
{
- return (pmd_flags(pte) & (_PAGE_PSE | _PAGE_PRESENT)) ==
- (_PAGE_PSE | _PAGE_PRESENT);
+ return pmd_flags(pte) & _PAGE_PSE;
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
@@ -415,7 +414,13 @@ static inline int pte_hidden(pte_t pte)
static inline int pmd_present(pmd_t pmd)
{
- return pmd_flags(pmd) & _PAGE_PRESENT;
+ /*
+ * Checking for _PAGE_PSE is needed too because
+ * split_huge_page will temporarily clear the present bit (but
+ * the _PAGE_PSE flag will remain set at all times while the
+ * _PAGE_PRESENT bit is clear).
+ */
+ return pmd_flags(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE | _PAGE_PSE);
}
static inline int pmd_none(pmd_t pmd)
diff --git a/arch/x86/include/asm/pgtable_32.h b/arch/x86/include/asm/pgtable_32.h
index 0c92113c4cb6..8faa215a503e 100644
--- a/arch/x86/include/asm/pgtable_32.h
+++ b/arch/x86/include/asm/pgtable_32.h
@@ -71,6 +71,7 @@ do { \
* tables contain all the necessary information.
*/
#define update_mmu_cache(vma, address, ptep) do { } while (0)
+#define update_mmu_cache_pmd(vma, address, pmd) do { } while (0)
#endif /* !__ASSEMBLY__ */
diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h
index 8251be02301e..47356f9df82e 100644
--- a/arch/x86/include/asm/pgtable_64.h
+++ b/arch/x86/include/asm/pgtable_64.h
@@ -143,6 +143,7 @@ static inline int pgd_large(pgd_t pgd) { return 0; }
#define pte_unmap(pte) ((void)(pte))/* NOP */
#define update_mmu_cache(vma, address, ptep) do { } while (0)
+#define update_mmu_cache_pmd(vma, address, pmd) do { } while (0)
/* Encode and de-code a swap entry */
#if _PAGE_BIT_FILE < _PAGE_BIT_PROTNONE
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index a530b230e7d7..8e13ecb41bee 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -1220,6 +1220,7 @@ good_area:
/* Clear FAULT_FLAG_ALLOW_RETRY to avoid any risk
* of starvation. */
flags &= ~FAULT_FLAG_ALLOW_RETRY;
+ flags |= FAULT_FLAG_TRIED;
goto retry;
}
}
diff --git a/arch/x86/mm/hugetlbpage.c b/arch/x86/mm/hugetlbpage.c
index b91e48512425..937bff5cdaa7 100644
--- a/arch/x86/mm/hugetlbpage.c
+++ b/arch/x86/mm/hugetlbpage.c
@@ -71,7 +71,6 @@ huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud)
struct address_space *mapping = vma->vm_file->f_mapping;
pgoff_t idx = ((addr - vma->vm_start) >> PAGE_SHIFT) +
vma->vm_pgoff;
- struct prio_tree_iter iter;
struct vm_area_struct *svma;
unsigned long saddr;
pte_t *spte = NULL;
@@ -81,7 +80,7 @@ huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud)
return (pte_t *)pmd_alloc(mm, pud, addr);
mutex_lock(&mapping->i_mmap_mutex);
- vma_prio_tree_foreach(svma, &iter, &mapping->i_mmap, idx, idx) {
+ vma_interval_tree_foreach(svma, &mapping->i_mmap, idx, idx) {
if (svma == vma)
continue;
diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index 3d68ef6d2266..0eb572eda406 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -664,20 +664,20 @@ static void free_pfn_range(u64 paddr, unsigned long size)
}
/*
- * track_pfn_vma_copy is called when vma that is covering the pfnmap gets
+ * track_pfn_copy is called when vma that is covering the pfnmap gets
* copied through copy_page_range().
*
* If the vma has a linear pfn mapping for the entire range, we get the prot
* from pte and reserve the entire vma range with single reserve_pfn_range call.
*/
-int track_pfn_vma_copy(struct vm_area_struct *vma)
+int track_pfn_copy(struct vm_area_struct *vma)
{
resource_size_t paddr;
unsigned long prot;
unsigned long vma_size = vma->vm_end - vma->vm_start;
pgprot_t pgprot;
- if (is_linear_pfn_mapping(vma)) {
+ if (vma->vm_flags & VM_PAT) {
/*
* reserve the whole chunk covered by vma. We need the
* starting address and protection from pte.
@@ -694,31 +694,59 @@ int track_pfn_vma_copy(struct vm_area_struct *vma)
}
/*
- * track_pfn_vma_new is called when a _new_ pfn mapping is being established
- * for physical range indicated by pfn and size.
- *
* prot is passed in as a parameter for the new mapping. If the vma has a
* linear pfn mapping for the entire range reserve the entire vma range with
* single reserve_pfn_range call.
*/
-int track_pfn_vma_new(struct vm_area_struct *vma, pgprot_t *prot,
- unsigned long pfn, unsigned long size)
+int track_pfn_remap(struct vm_area_struct *vma, pgprot_t *prot,
+ unsigned long pfn, unsigned long addr, unsigned long size)
{
+ resource_size_t paddr = (resource_size_t)pfn << PAGE_SHIFT;
unsigned long flags;
- resource_size_t paddr;
- unsigned long vma_size = vma->vm_end - vma->vm_start;
- if (is_linear_pfn_mapping(vma)) {
- /* reserve the whole chunk starting from vm_pgoff */
- paddr = (resource_size_t)vma->vm_pgoff << PAGE_SHIFT;
- return reserve_pfn_range(paddr, vma_size, prot, 0);
+ /* reserve the whole chunk starting from paddr */
+ if (addr == vma->vm_start && size == (vma->vm_end - vma->vm_start)) {
+ int ret;
+
+ ret = reserve_pfn_range(paddr, size, prot, 0);
+ if (!ret)
+ vma->vm_flags |= VM_PAT;
+ return ret;
}
if (!pat_enabled)
return 0;
- /* for vm_insert_pfn and friends, we set prot based on lookup */
- flags = lookup_memtype(pfn << PAGE_SHIFT);
+ /*
+ * For anything smaller than the vma size we set prot based on the
+ * lookup.
+ */
+ flags = lookup_memtype(paddr);
+
+ /* Check memtype for the remaining pages */
+ while (size > PAGE_SIZE) {
+ size -= PAGE_SIZE;
+ paddr += PAGE_SIZE;
+ if (flags != lookup_memtype(paddr))
+ return -EINVAL;
+ }
+
+ *prot = __pgprot((pgprot_val(vma->vm_page_prot) & (~_PAGE_CACHE_MASK)) |
+ flags);
+
+ return 0;
+}
+
+int track_pfn_insert(struct vm_area_struct *vma, pgprot_t *prot,
+ unsigned long pfn)
+{
+ unsigned long flags;
+
+ if (!pat_enabled)
+ return 0;
+
+ /* Set prot based on lookup */
+ flags = lookup_memtype((resource_size_t)pfn << PAGE_SHIFT);
*prot = __pgprot((pgprot_val(vma->vm_page_prot) & (~_PAGE_CACHE_MASK)) |
flags);
@@ -726,22 +754,31 @@ int track_pfn_vma_new(struct vm_area_struct *vma, pgprot_t *prot,
}
/*
- * untrack_pfn_vma is called while unmapping a pfnmap for a region.
+ * untrack_pfn is called while unmapping a pfnmap for a region.
* untrack can be called for a specific region indicated by pfn and size or
- * can be for the entire vma (in which case size can be zero).
+ * can be for the entire vma (in which case pfn, size are zero).
*/
-void untrack_pfn_vma(struct vm_area_struct *vma, unsigned long pfn,
- unsigned long size)
+void untrack_pfn(struct vm_area_struct *vma, unsigned long pfn,
+ unsigned long size)
{
resource_size_t paddr;
- unsigned long vma_size = vma->vm_end - vma->vm_start;
+ unsigned long prot;
- if (is_linear_pfn_mapping(vma)) {
- /* free the whole chunk starting from vm_pgoff */
- paddr = (resource_size_t)vma->vm_pgoff << PAGE_SHIFT;
- free_pfn_range(paddr, vma_size);
+ if (!(vma->vm_flags & VM_PAT))
return;
+
+ /* free the chunk starting from pfn or the whole chunk */
+ paddr = (resource_size_t)pfn << PAGE_SHIFT;
+ if (!paddr && !size) {
+ if (follow_phys(vma, vma->vm_start, 0, &prot, &paddr)) {
+ WARN_ON_ONCE(1);
+ return;
+ }
+
+ size = vma->vm_end - vma->vm_start;
}
+ free_pfn_range(paddr, size);
+ vma->vm_flags &= ~VM_PAT;
}
pgprot_t pgprot_writecombine(pgprot_t prot)
diff --git a/arch/x86/mm/pat_rbtree.c b/arch/x86/mm/pat_rbtree.c
index 8acaddd0fb21..415f6c4ced36 100644
--- a/arch/x86/mm/pat_rbtree.c
+++ b/arch/x86/mm/pat_rbtree.c
@@ -12,7 +12,7 @@
#include <linux/debugfs.h>
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/rbtree.h>
+#include <linux/rbtree_augmented.h>
#include <linux/sched.h>
#include <linux/gfp.h>
@@ -54,29 +54,24 @@ static u64 get_subtree_max_end(struct rb_node *node)
return ret;
}
-/* Update 'subtree_max_end' for a node, based on node and its children */
-static void memtype_rb_augment_cb(struct rb_node *node, void *__unused)
+static u64 compute_subtree_max_end(struct memtype *data)
{
- struct memtype *data;
- u64 max_end, child_max_end;
-
- if (!node)
- return;
+ u64 max_end = data->end, child_max_end;
- data = container_of(node, struct memtype, rb);
- max_end = data->end;
-
- child_max_end = get_subtree_max_end(node->rb_right);
+ child_max_end = get_subtree_max_end(data->rb.rb_right);
if (child_max_end > max_end)
max_end = child_max_end;
- child_max_end = get_subtree_max_end(node->rb_left);
+ child_max_end = get_subtree_max_end(data->rb.rb_left);
if (child_max_end > max_end)
max_end = child_max_end;
- data->subtree_max_end = max_end;
+ return max_end;
}
+RB_DECLARE_CALLBACKS(static, memtype_rb_augment_cb, struct memtype, rb,
+ u64, subtree_max_end, compute_subtree_max_end)
+
/* Find the first (lowest start addr) overlapping range from rb tree */
static struct memtype *memtype_rb_lowest_match(struct rb_root *root,
u64 start, u64 end)
@@ -179,15 +174,17 @@ static void memtype_rb_insert(struct rb_root *root, struct memtype *newdata)
struct memtype *data = container_of(*node, struct memtype, rb);
parent = *node;
+ if (data->subtree_max_end < newdata->end)
+ data->subtree_max_end = newdata->end;
if (newdata->start <= data->start)
node = &((*node)->rb_left);
else if (newdata->start > data->start)
node = &((*node)->rb_right);
}
+ newdata->subtree_max_end = newdata->end;
rb_link_node(&newdata->rb, parent, node);
- rb_insert_color(&newdata->rb, root);
- rb_augment_insert(&newdata->rb, memtype_rb_augment_cb, NULL);
+ rb_insert_augmented(&newdata->rb, root, &memtype_rb_augment_cb);
}
int rbt_memtype_check_insert(struct memtype *new, unsigned long *ret_type)
@@ -209,16 +206,13 @@ int rbt_memtype_check_insert(struct memtype *new, unsigned long *ret_type)
struct memtype *rbt_memtype_erase(u64 start, u64 end)
{
- struct rb_node *deepest;
struct memtype *data;
data = memtype_rb_exact_match(&memtype_rbroot, start, end);
if (!data)
goto out;
- deepest = rb_augment_erase_begin(&data->rb);
- rb_erase(&data->rb, &memtype_rbroot);
- rb_augment_erase_end(deepest, memtype_rb_augment_cb, NULL);
+ rb_erase_augmented(&data->rb, &memtype_rbroot, &memtype_rb_augment_cb);
out:
return data;
}
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 5a16824cc2b3..fd28d86fe3d2 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -2451,8 +2451,7 @@ int xen_remap_domain_mfn_range(struct vm_area_struct *vma,
prot = __pgprot(pgprot_val(prot) | _PAGE_IOMAP);
- BUG_ON(!((vma->vm_flags & (VM_PFNMAP | VM_RESERVED | VM_IO)) ==
- (VM_PFNMAP | VM_RESERVED | VM_IO)));
+ BUG_ON(!((vma->vm_flags & (VM_PFNMAP | VM_IO)) == (VM_PFNMAP | VM_IO)));
rmd.mfn = mfn;
rmd.prot = prot;
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-09 21:12:37 +0000