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Merge remote-tracking branch 'origin/x86/mm' into x86/mm2 

Explicitly merging these two branches due to nontrivial conflicts and
to allow further work.

Resolved Conflicts:
	arch/x86/kernel/head32.c
	arch/x86/kernel/head64.c
	arch/x86/mm/init_64.c
	arch/x86/realmode/init.c

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
H. Peter Anvin 2013-02-01 02:25:06 -08:00
parent ac2cbab21f 07f4207a30
commit 68d00bbebb
29 changed files with 199 additions and 287 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86/Kconfig
View File

@ -1253,10 +1253,6 @@ config NODES_SHIFT
Specify the maximum number of NUMA Nodes available on the target
system. Increases memory reserved to accommodate various tables.
config HAVE_ARCH_ALLOC_REMAP
def_bool y
depends on X86_32 && NUMA
config ARCH_HAVE_MEMORY_PRESENT
def_bool y
depends on X86_32 && DISCONTIGMEM

6
arch/x86/include/asm/mmzone_32.h
View File

@ -14,12 +14,6 @@ extern struct pglist_data *node_data[];
#include <asm/numaq.h>
extern void resume_map_numa_kva(pgd_t *pgd);
#else /* !CONFIG_NUMA */
static inline void resume_map_numa_kva(pgd_t *pgd) {}
#endif /* CONFIG_NUMA */
#ifdef CONFIG_DISCONTIGMEM

3
arch/x86/include/asm/page.h
View File

@ -48,7 +48,8 @@ static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
* case properly. Once all supported versions of gcc understand it, we can
* remove this Voodoo magic stuff. (i.e. once gcc3.x is deprecated)
*/
#define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x)))
#define __pa_symbol(x) \
__phys_addr_symbol(__phys_reloc_hide((unsigned long)(x)))
#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))

1
arch/x86/include/asm/page_32.h
View File

@ -15,6 +15,7 @@ extern unsigned long __phys_addr(unsigned long);
#else
#define __phys_addr(x) __phys_addr_nodebug(x)
#endif
#define __phys_addr_symbol(x) __phys_addr(x)
#define __phys_reloc_hide(x) RELOC_HIDE((x), 0)
#ifdef CONFIG_FLATMEM

36
arch/x86/include/asm/page_64.h
View File

@ -3,4 +3,40 @@
#include <asm/page_64_types.h>
#ifndef __ASSEMBLY__
/* duplicated to the one in bootmem.h */
extern unsigned long max_pfn;
extern unsigned long phys_base;
static inline unsigned long __phys_addr_nodebug(unsigned long x)
{
unsigned long y = x - __START_KERNEL_map;
/* use the carry flag to determine if x was < __START_KERNEL_map */
x = y + ((x > y) ? phys_base : (__START_KERNEL_map - PAGE_OFFSET));
return x;
}
#ifdef CONFIG_DEBUG_VIRTUAL
extern unsigned long __phys_addr(unsigned long);
extern unsigned long __phys_addr_symbol(unsigned long);
#else
#define __phys_addr(x) __phys_addr_nodebug(x)
#define __phys_addr_symbol(x) \
((unsigned long)(x) - __START_KERNEL_map + phys_base)
#endif
#define __phys_reloc_hide(x) (x)
#ifdef CONFIG_FLATMEM
#define pfn_valid(pfn) ((pfn) < max_pfn)
#endif
void clear_page(void *page);
void copy_page(void *to, void *from);
#endif /* !__ASSEMBLY__ */
#endif /* _ASM_X86_PAGE_64_H */

22
arch/x86/include/asm/page_64_types.h
View File

@ -50,26 +50,4 @@
#define KERNEL_IMAGE_SIZE (512 * 1024 * 1024)
#define KERNEL_IMAGE_START _AC(0xffffffff80000000, UL)
#ifndef __ASSEMBLY__
void clear_page(void *page);
void copy_page(void *to, void *from);
/* duplicated to the one in bootmem.h */
extern unsigned long max_pfn;
extern unsigned long phys_base;
extern unsigned long __phys_addr(unsigned long);
#define __phys_reloc_hide(x) (x)
#define vmemmap ((struct page *)VMEMMAP_START)
extern void init_extra_mapping_uc(unsigned long phys, unsigned long size);
extern void init_extra_mapping_wb(unsigned long phys, unsigned long size);
#endif /* !__ASSEMBLY__ */
#ifdef CONFIG_FLATMEM
#define pfn_valid(pfn) ((pfn) < max_pfn)
#endif
#endif /* _ASM_X86_PAGE_64_DEFS_H */

14
arch/x86/include/asm/pgtable.h
View File

@ -390,6 +390,7 @@ pte_t *populate_extra_pte(unsigned long vaddr);
#ifndef __ASSEMBLY__
#include <linux/mm_types.h>
#include <linux/log2.h>
static inline int pte_none(pte_t pte)
{
@ -783,6 +784,19 @@ static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count)
memcpy(dst, src, count * sizeof(pgd_t));
}
#define PTE_SHIFT ilog2(PTRS_PER_PTE)
static inline int page_level_shift(enum pg_level level)
{
return (PAGE_SHIFT - PTE_SHIFT) + level * PTE_SHIFT;
}
static inline unsigned long page_level_size(enum pg_level level)
{
return 1UL << page_level_shift(level);
}
static inline unsigned long page_level_mask(enum pg_level level)
{
return ~(page_level_size(level) - 1);
}
#include <asm-generic/pgtable.h>
#endif /* __ASSEMBLY__ */

5
arch/x86/include/asm/pgtable_64.h
View File

@ -183,6 +183,11 @@ extern void cleanup_highmap(void);
#define __HAVE_ARCH_PTE_SAME
#define vmemmap ((struct page *)VMEMMAP_START)
extern void init_extra_mapping_uc(unsigned long phys, unsigned long size);
extern void init_extra_mapping_wb(unsigned long phys, unsigned long size);
#endif /* !__ASSEMBLY__ */
#endif /* _ASM_X86_PGTABLE_64_H */

3
arch/x86/include/asm/pgtable_types.h
View File

@ -330,7 +330,7 @@ extern void native_pagetable_init(void);
struct seq_file;
extern void arch_report_meminfo(struct seq_file *m);
enum {
enum pg_level {
PG_LEVEL_NONE,
PG_LEVEL_4K,
PG_LEVEL_2M,
@ -351,6 +351,7 @@ static inline void update_page_count(int level, unsigned long pages) { }
* as a pte too.
*/
extern pte_t *lookup_address(unsigned long address, unsigned int *level);
extern phys_addr_t slow_virt_to_phys(void *__address);
#endif /* !__ASSEMBLY__ */

2
arch/x86/kernel/acpi/sleep.c
View File

@ -69,7 +69,7 @@ int acpi_suspend_lowlevel(void)
#ifndef CONFIG_64BIT
header->pmode_entry = (u32)&wakeup_pmode_return;
header->pmode_cr3 = (u32)__pa(&initial_page_table);
header->pmode_cr3 = (u32)__pa_symbol(initial_page_table);
saved_magic = 0x12345678;
#else /* CONFIG_64BIT */
#ifdef CONFIG_SMP

1
arch/x86/kernel/apic/apic_numachip.c
View File

@ -28,6 +28,7 @@
#include <asm/apic.h>
#include <asm/ipi.h>
#include <asm/apic_flat_64.h>
#include <asm/pgtable.h>
static int numachip_system __read_mostly;

2
arch/x86/kernel/cpu/intel.c
View File

@ -167,7 +167,7 @@ int __cpuinit ppro_with_ram_bug(void)
#ifdef CONFIG_X86_F00F_BUG
static void __cpuinit trap_init_f00f_bug(void)
{
__set_fixmap(FIX_F00F_IDT, __pa(&idt_table), PAGE_KERNEL_RO);
__set_fixmap(FIX_F00F_IDT, __pa_symbol(idt_table), PAGE_KERNEL_RO);
/*
* Update the IDT descriptor and reload the IDT so that

4
arch/x86/kernel/ftrace.c
View File

@ -89,7 +89,7 @@ do_ftrace_mod_code(unsigned long ip, const void *new_code)
* kernel identity mapping to modify code.
*/
if (within(ip, (unsigned long)_text, (unsigned long)_etext))
ip = (unsigned long)__va(__pa(ip));
ip = (unsigned long)__va(__pa_symbol(ip));
return probe_kernel_write((void *)ip, new_code, MCOUNT_INSN_SIZE);
}
@ -279,7 +279,7 @@ static int ftrace_write(unsigned long ip, const char *val, int size)
* kernel identity mapping to modify code.
*/
if (within(ip, (unsigned long)_text, (unsigned long)_etext))
ip = (unsigned long)__va(__pa(ip));
ip = (unsigned long)__va(__pa_symbol(ip));
return probe_kernel_write((void *)ip, val, size);
}

9
arch/x86/kernel/kvm.c
View File

@ -297,9 +297,9 @@ static void kvm_register_steal_time(void)
memset(st, 0, sizeof(*st));
wrmsrl(MSR_KVM_STEAL_TIME, (__pa(st) | KVM_MSR_ENABLED));
wrmsrl(MSR_KVM_STEAL_TIME, (slow_virt_to_phys(st) | KVM_MSR_ENABLED));
printk(KERN_INFO "kvm-stealtime: cpu %d, msr %lx\n",
cpu, __pa(st));
cpu, slow_virt_to_phys(st));
}
static DEFINE_PER_CPU(unsigned long, kvm_apic_eoi) = KVM_PV_EOI_DISABLED;
@ -324,7 +324,7 @@ void __cpuinit kvm_guest_cpu_init(void)
return;
if (kvm_para_has_feature(KVM_FEATURE_ASYNC_PF) && kvmapf) {
u64 pa = __pa(&__get_cpu_var(apf_reason));
u64 pa = slow_virt_to_phys(&__get_cpu_var(apf_reason));
#ifdef CONFIG_PREEMPT
pa |= KVM_ASYNC_PF_SEND_ALWAYS;
@ -340,7 +340,8 @@ void __cpuinit kvm_guest_cpu_init(void)
/* Size alignment is implied but just to make it explicit. */
BUILD_BUG_ON(__alignof__(kvm_apic_eoi) < 4);
__get_cpu_var(kvm_apic_eoi) = 0;
pa = __pa(&__get_cpu_var(kvm_apic_eoi)) | KVM_MSR_ENABLED;
pa = slow_virt_to_phys(&__get_cpu_var(kvm_apic_eoi))
| KVM_MSR_ENABLED;
wrmsrl(MSR_KVM_PV_EOI_EN, pa);
}

4
arch/x86/kernel/kvmclock.c
View File

@ -162,8 +162,8 @@ int kvm_register_clock(char *txt)
int low, high, ret;
struct pvclock_vcpu_time_info *src = &hv_clock[cpu].pvti;
low = (int)__pa(src) | 1;
high = ((u64)__pa(src) >> 32);
low = (int)slow_virt_to_phys(src) | 1;
high = ((u64)slow_virt_to_phys(src) >> 32);
ret = native_write_msr_safe(msr_kvm_system_time, low, high);
printk(KERN_INFO "kvm-clock: cpu %d, msr %x:%x, %s\n",
cpu, high, low, txt);

16
arch/x86/kernel/setup.c
View File

@ -284,8 +284,8 @@ static void __init cleanup_highmap(void)
static void __init reserve_brk(void)
{
if (_brk_end > _brk_start)
memblock_reserve(__pa(_brk_start),
__pa(_brk_end) - __pa(_brk_start));
memblock_reserve(__pa_symbol(_brk_start),
_brk_end - _brk_start);
/* Mark brk area as locked down and no longer taking any
new allocations */
@ -903,12 +903,12 @@ void __init setup_arch(char **cmdline_p)
init_mm.end_data = (unsigned long) _edata;
init_mm.brk = _brk_end;
code_resource.start = virt_to_phys(_text);
code_resource.end = virt_to_phys(_etext)-1;
data_resource.start = virt_to_phys(_etext);
data_resource.end = virt_to_phys(_edata)-1;
bss_resource.start = virt_to_phys(&__bss_start);
bss_resource.end = virt_to_phys(&__bss_stop)-1;
code_resource.start = __pa_symbol(_text);
code_resource.end = __pa_symbol(_etext)-1;
data_resource.start = __pa_symbol(_etext);
data_resource.end = __pa_symbol(_edata)-1;
bss_resource.start = __pa_symbol(__bss_start);
bss_resource.end = __pa_symbol(__bss_stop)-1;
#ifdef CONFIG_CMDLINE_BOOL
#ifdef CONFIG_CMDLINE_OVERRIDE

3
arch/x86/kernel/x8664_ksyms_64.c
View File

@ -59,6 +59,9 @@ EXPORT_SYMBOL(memcpy);
EXPORT_SYMBOL(__memcpy);
EXPORT_SYMBOL(memmove);
#ifndef CONFIG_DEBUG_VIRTUAL
EXPORT_SYMBOL(phys_base);
#endif
EXPORT_SYMBOL(empty_zero_page);
#ifndef CONFIG_PARAVIRT
EXPORT_SYMBOL(native_load_gs_index);

3
arch/x86/lguest/boot.c
View File

@ -552,7 +552,8 @@ static void lguest_write_cr3(unsigned long cr3)
current_cr3 = cr3;
/* These two page tables are simple, linear, and used during boot */
if (cr3 != __pa(swapper_pg_dir) && cr3 != __pa(initial_page_table))
if (cr3 != __pa_symbol(swapper_pg_dir) &&
cr3 != __pa_symbol(initial_page_table))
cr3_changed = true;
}

18
arch/x86/mm/init_64.c
View File

@ -804,12 +804,10 @@ void set_kernel_text_ro(void)
void mark_rodata_ro(void)
{
unsigned long start = PFN_ALIGN(_text);
unsigned long rodata_start =
((unsigned long)__start_rodata + PAGE_SIZE - 1) & PAGE_MASK;
unsigned long rodata_start = PFN_ALIGN(__start_rodata);
unsigned long end = (unsigned long) &__end_rodata_hpage_align;
unsigned long text_end = PAGE_ALIGN((unsigned long) &__stop___ex_table);
unsigned long rodata_end = PAGE_ALIGN((unsigned long) &__end_rodata);
unsigned long data_start = (unsigned long) &_sdata;
unsigned long text_end = PFN_ALIGN(&__stop___ex_table);
unsigned long rodata_end = PFN_ALIGN(&__end_rodata);
unsigned long all_end = PFN_ALIGN(&_end);
printk(KERN_INFO "Write protecting the kernel read-only data: %luk\n",
@ -835,12 +833,12 @@ void mark_rodata_ro(void)
#endif
free_init_pages("unused kernel memory",
(unsigned long) page_address(virt_to_page(text_end)),
(unsigned long)
page_address(virt_to_page(rodata_start)));
(unsigned long) __va(__pa_symbol(text_end)),
(unsigned long) __va(__pa_symbol(rodata_start)));
free_init_pages("unused kernel memory",
(unsigned long) page_address(virt_to_page(rodata_end)),
(unsigned long) page_address(virt_to_page(data_start)));
(unsigned long) __va(__pa_symbol(rodata_end)),
(unsigned long) __va(__pa_symbol(_sdata)));
}
#endif

32
arch/x86/mm/numa.c
View File

@ -193,7 +193,6 @@ int __init numa_add_memblk(int nid, u64 start, u64 end)
static void __init setup_node_data(int nid, u64 start, u64 end)
{
const size_t nd_size = roundup(sizeof(pg_data_t), PAGE_SIZE);
bool remapped = false;
u64 nd_pa;
void *nd;
int tnid;
@ -205,37 +204,28 @@ static void __init setup_node_data(int nid, u64 start, u64 end)
if (end && (end - start) < NODE_MIN_SIZE)
return;
/* initialize remap allocator before aligning to ZONE_ALIGN */
init_alloc_remap(nid, start, end);
start = roundup(start, ZONE_ALIGN);
printk(KERN_INFO "Initmem setup node %d [mem %#010Lx-%#010Lx]\n",
nid, start, end - 1);
/*
* Allocate node data. Try remap allocator first, node-local
* memory and then any node. Never allocate in DMA zone.
* Allocate node data. Try node-local memory and then any node.
* Never allocate in DMA zone.
*/
nd = alloc_remap(nid, nd_size);
if (nd) {
nd_pa = __pa(nd);
remapped = true;
} else {
nd_pa = memblock_alloc_nid(nd_size, SMP_CACHE_BYTES, nid);
if (!nd_pa) {
pr_err("Cannot find %zu bytes in node %d\n",
nd_size, nid);
return;
}
nd = __va(nd_pa);
nd_pa = memblock_alloc_nid(nd_size, SMP_CACHE_BYTES, nid);
if (!nd_pa) {
pr_err("Cannot find %zu bytes in node %d\n",
nd_size, nid);
return;
}
nd = __va(nd_pa);
/* report and initialize */
printk(KERN_INFO " NODE_DATA [mem %#010Lx-%#010Lx]%s\n",
nd_pa, nd_pa + nd_size - 1, remapped ? " (remapped)" : "");
printk(KERN_INFO " NODE_DATA [mem %#010Lx-%#010Lx]\n",
nd_pa, nd_pa + nd_size - 1);
tnid = early_pfn_to_nid(nd_pa >> PAGE_SHIFT);
if (!remapped && tnid != nid)
if (tnid != nid)
printk(KERN_INFO " NODE_DATA(%d) on node %d\n", nid, tnid);
node_data[nid] = nd;

161
arch/x86/mm/numa_32.c
View File

@ -73,167 +73,6 @@ unsigned long node_memmap_size_bytes(int nid, unsigned long start_pfn,
extern unsigned long highend_pfn, highstart_pfn;
#define LARGE_PAGE_BYTES (PTRS_PER_PTE * PAGE_SIZE)
static void *node_remap_start_vaddr[MAX_NUMNODES];
void set_pmd_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags);
/*
* Remap memory allocator
*/
static unsigned long node_remap_start_pfn[MAX_NUMNODES];
static void *node_remap_end_vaddr[MAX_NUMNODES];
static void *node_remap_alloc_vaddr[MAX_NUMNODES];
/**
* alloc_remap - Allocate remapped memory
* @nid: NUMA node to allocate memory from
* @size: The size of allocation
*
* Allocate @size bytes from the remap area of NUMA node @nid. The
* size of the remap area is predetermined by init_alloc_remap() and
* only the callers considered there should call this function. For
* more info, please read the comment on top of init_alloc_remap().
*
* The caller must be ready to handle allocation failure from this
* function and fall back to regular memory allocator in such cases.
*
* CONTEXT:
* Single CPU early boot context.
*
* RETURNS:
* Pointer to the allocated memory on success, %NULL on failure.
*/
void *alloc_remap(int nid, unsigned long size)
{
void *allocation = node_remap_alloc_vaddr[nid];
size = ALIGN(size, L1_CACHE_BYTES);
if (!allocation || (allocation + size) > node_remap_end_vaddr[nid])
return NULL;
node_remap_alloc_vaddr[nid] += size;
memset(allocation, 0, size);
return allocation;
}
#ifdef CONFIG_HIBERNATION
/**
* resume_map_numa_kva - add KVA mapping to the temporary page tables created
* during resume from hibernation
* @pgd_base - temporary resume page directory
*/
void resume_map_numa_kva(pgd_t *pgd_base)
{
int node;
for_each_online_node(node) {
unsigned long start_va, start_pfn, nr_pages, pfn;
start_va = (unsigned long)node_remap_start_vaddr[node];
start_pfn = node_remap_start_pfn[node];
nr_pages = (node_remap_end_vaddr[node] -
node_remap_start_vaddr[node]) >> PAGE_SHIFT;
printk(KERN_DEBUG "%s: node %d\n", __func__, node);
for (pfn = 0; pfn < nr_pages; pfn += PTRS_PER_PTE) {
unsigned long vaddr = start_va + (pfn << PAGE_SHIFT);
pgd_t *pgd = pgd_base + pgd_index(vaddr);
pud_t *pud = pud_offset(pgd, vaddr);
pmd_t *pmd = pmd_offset(pud, vaddr);
set_pmd(pmd, pfn_pmd(start_pfn + pfn,
PAGE_KERNEL_LARGE_EXEC));
printk(KERN_DEBUG "%s: %08lx -> pfn %08lx\n",
__func__, vaddr, start_pfn + pfn);
}
}
}
#endif
/**
* init_alloc_remap - Initialize remap allocator for a NUMA node
* @nid: NUMA node to initizlie remap allocator for
*
* NUMA nodes may end up without any lowmem. As allocating pgdat and
* memmap on a different node with lowmem is inefficient, a special
* remap allocator is implemented which can be used by alloc_remap().
*
* For each node, the amount of memory which will be necessary for
* pgdat and memmap is calculated and two memory areas of the size are
* allocated - one in the node and the other in lowmem; then, the area
* in the node is remapped to the lowmem area.
*
* As pgdat and memmap must be allocated in lowmem anyway, this
* doesn't waste lowmem address space; however, the actual lowmem
* which gets remapped over is wasted. The amount shouldn't be
* problematic on machines this feature will be used.
*
* Initialization failure isn't fatal. alloc_remap() is used
* opportunistically and the callers will fall back to other memory
* allocation mechanisms on failure.
*/
void __init init_alloc_remap(int nid, u64 start, u64 end)
{
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long end_pfn = end >> PAGE_SHIFT;
unsigned long size, pfn;
u64 node_pa, remap_pa;
void *remap_va;
/*
* The acpi/srat node info can show hot-add memroy zones where
* memory could be added but not currently present.
*/
printk(KERN_DEBUG "node %d pfn: [%lx - %lx]\n",
nid, start_pfn, end_pfn);
/* calculate the necessary space aligned to large page size */
size = node_memmap_size_bytes(nid, start_pfn, end_pfn);
size += ALIGN(sizeof(pg_data_t), PAGE_SIZE);
size = ALIGN(size, LARGE_PAGE_BYTES);
/* allocate node memory and the lowmem remap area */
node_pa = memblock_find_in_range(start, end, size, LARGE_PAGE_BYTES);
if (!node_pa) {
pr_warning("remap_alloc: failed to allocate %lu bytes for node %d\n",
size, nid);
return;
}
memblock_reserve(node_pa, size);
remap_pa = memblock_find_in_range(min_low_pfn << PAGE_SHIFT,
max_low_pfn << PAGE_SHIFT,
size, LARGE_PAGE_BYTES);
if (!remap_pa) {
pr_warning("remap_alloc: failed to allocate %lu bytes remap area for node %d\n",
size, nid);
memblock_free(node_pa, size);
return;
}
memblock_reserve(remap_pa, size);
remap_va = phys_to_virt(remap_pa);
/* perform actual remap */
for (pfn = 0; pfn < size >> PAGE_SHIFT; pfn += PTRS_PER_PTE)
set_pmd_pfn((unsigned long)remap_va + (pfn << PAGE_SHIFT),
(node_pa >> PAGE_SHIFT) + pfn,
PAGE_KERNEL_LARGE);
/* initialize remap allocator parameters */
node_remap_start_pfn[nid] = node_pa >> PAGE_SHIFT;
node_remap_start_vaddr[nid] = remap_va;
node_remap_end_vaddr[nid] = remap_va + size;
node_remap_alloc_vaddr[nid] = remap_va;
printk(KERN_DEBUG "remap_alloc: node %d [%08llx-%08llx) -> [%p-%p)\n",
nid, node_pa, node_pa + size, remap_va, remap_va + size);
}
void __init initmem_init(void)
{
x86_numa_init();

6
arch/x86/mm/numa_internal.h
View File

@ -21,12 +21,6 @@ void __init numa_reset_distance(void);
void __init x86_numa_init(void);
#ifdef CONFIG_X86_64
static inline void init_alloc_remap(int nid, u64 start, u64 end) { }
#else
void __init init_alloc_remap(int nid, u64 start, u64 end);
#endif
#ifdef CONFIG_NUMA_EMU
void __init numa_emulation(struct numa_meminfo *numa_meminfo,
int numa_dist_cnt);

50
arch/x86/mm/pageattr.c
View File

@ -94,12 +94,12 @@ static inline void split_page_count(int level) { }
static inline unsigned long highmap_start_pfn(void)
{
return __pa(_text) >> PAGE_SHIFT;
return __pa_symbol(_text) >> PAGE_SHIFT;
}
static inline unsigned long highmap_end_pfn(void)
{
return __pa(roundup(_brk_end, PMD_SIZE)) >> PAGE_SHIFT;
return __pa_symbol(roundup(_brk_end, PMD_SIZE)) >> PAGE_SHIFT;
}
#endif
@ -276,8 +276,8 @@ static inline pgprot_t static_protections(pgprot_t prot, unsigned long address,
* The .rodata section needs to be read-only. Using the pfn
* catches all aliases.
*/
if (within(pfn, __pa((unsigned long)__start_rodata) >> PAGE_SHIFT,
__pa((unsigned long)__end_rodata) >> PAGE_SHIFT))
if (within(pfn, __pa_symbol(__start_rodata) >> PAGE_SHIFT,
__pa_symbol(__end_rodata) >> PAGE_SHIFT))
pgprot_val(forbidden) |= _PAGE_RW;
#if defined(CONFIG_X86_64) && defined(CONFIG_DEBUG_RODATA)
@ -363,6 +363,37 @@ pte_t *lookup_address(unsigned long address, unsigned int *level)
}
EXPORT_SYMBOL_GPL(lookup_address);
/*
* This is necessary because __pa() does not work on some
* kinds of memory, like vmalloc() or the alloc_remap()
* areas on 32-bit NUMA systems. The percpu areas can
* end up in this kind of memory, for instance.
*
* This could be optimized, but it is only intended to be
* used at inititalization time, and keeping it
* unoptimized should increase the testing coverage for
* the more obscure platforms.
*/
phys_addr_t slow_virt_to_phys(void *__virt_addr)
{
unsigned long virt_addr = (unsigned long)__virt_addr;
phys_addr_t phys_addr;
unsigned long offset;
enum pg_level level;
unsigned long psize;
unsigned long pmask;
pte_t *pte;
pte = lookup_address(virt_addr, &level);
BUG_ON(!pte);
psize = page_level_size(level);
pmask = page_level_mask(level);
offset = virt_addr & ~pmask;
phys_addr = pte_pfn(*pte) << PAGE_SHIFT;
return (phys_addr | offset);
}
EXPORT_SYMBOL_GPL(slow_virt_to_phys);
/*
* Set the new pmd in all the pgds we know about:
*/
@ -396,7 +427,7 @@ try_preserve_large_page(pte_t *kpte, unsigned long address,
pte_t new_pte, old_pte, *tmp;
pgprot_t old_prot, new_prot, req_prot;
int i, do_split = 1;
unsigned int level;
enum pg_level level;
if (cpa->force_split)
return 1;
@ -412,15 +443,12 @@ try_preserve_large_page(pte_t *kpte, unsigned long address,
switch (level) {
case PG_LEVEL_2M:
psize = PMD_PAGE_SIZE;
pmask = PMD_PAGE_MASK;
break;
#ifdef CONFIG_X86_64
case PG_LEVEL_1G:
psize = PUD_PAGE_SIZE;
pmask = PUD_PAGE_MASK;
break;
#endif
psize = page_level_size(level);
pmask = page_level_mask(level);
break;
default:
do_split = -EINVAL;
goto out_unlock;

4
arch/x86/mm/pat.c
View File

@ -560,10 +560,10 @@ int kernel_map_sync_memtype(u64 base, unsigned long size, unsigned long flags)
{
unsigned long id_sz;
if (base >= __pa(high_memory))
if (base > __pa(high_memory-1))
return 0;
id_sz = (__pa(high_memory) < base + size) ?
id_sz = (__pa(high_memory-1) <= base + size) ?
__pa(high_memory) - base :
size;

7
arch/x86/mm/pgtable.c
View File

@ -334,7 +334,12 @@ int pmdp_set_access_flags(struct vm_area_struct *vma,
if (changed && dirty) {
*pmdp = entry;
pmd_update_defer(vma->vm_mm, address, pmdp);
flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE);
/*
* We had a write-protection fault here and changed the pmd
* to to more permissive. No need to flush the TLB for that,
* #PF is architecturally guaranteed to do that and in the
* worst-case we'll generate a spurious fault.
*/
}
return changed;

60
arch/x86/mm/physaddr.c
View File

@ -1,3 +1,4 @@
#include <linux/bootmem.h>
#include <linux/mmdebug.h>
#include <linux/module.h>
#include <linux/mm.h>
@ -8,33 +9,54 @@
#ifdef CONFIG_X86_64
#ifdef CONFIG_DEBUG_VIRTUAL
unsigned long __phys_addr(unsigned long x)
{
if (x >= __START_KERNEL_map) {
x -= __START_KERNEL_map;
VIRTUAL_BUG_ON(x >= KERNEL_IMAGE_SIZE);
x += phys_base;
unsigned long y = x - __START_KERNEL_map;
/* use the carry flag to determine if x was < __START_KERNEL_map */
if (unlikely(x > y)) {
x = y + phys_base;
VIRTUAL_BUG_ON(y >= KERNEL_IMAGE_SIZE);
} else {
VIRTUAL_BUG_ON(x < PAGE_OFFSET);
x -= PAGE_OFFSET;
VIRTUAL_BUG_ON(!phys_addr_valid(x));
x = y + (__START_KERNEL_map - PAGE_OFFSET);
/* carry flag will be set if starting x was >= PAGE_OFFSET */
VIRTUAL_BUG_ON((x > y) || !phys_addr_valid(x));
}
return x;
}
EXPORT_SYMBOL(__phys_addr);
unsigned long __phys_addr_symbol(unsigned long x)
{
unsigned long y = x - __START_KERNEL_map;
/* only check upper bounds since lower bounds will trigger carry */
VIRTUAL_BUG_ON(y >= KERNEL_IMAGE_SIZE);
return y + phys_base;
}
EXPORT_SYMBOL(__phys_addr_symbol);
#endif
bool __virt_addr_valid(unsigned long x)
{
if (x >= __START_KERNEL_map) {
x -= __START_KERNEL_map;
if (x >= KERNEL_IMAGE_SIZE)
unsigned long y = x - __START_KERNEL_map;
/* use the carry flag to determine if x was < __START_KERNEL_map */
if (unlikely(x > y)) {
x = y + phys_base;
if (y >= KERNEL_IMAGE_SIZE)
return false;
x += phys_base;
} else {
if (x < PAGE_OFFSET)
return false;
x -= PAGE_OFFSET;
if (!phys_addr_valid(x))
x = y + (__START_KERNEL_map - PAGE_OFFSET);
/* carry flag will be set if starting x was >= PAGE_OFFSET */
if ((x > y) || !phys_addr_valid(x))
return false;
}
@ -47,10 +69,16 @@ EXPORT_SYMBOL(__virt_addr_valid);
#ifdef CONFIG_DEBUG_VIRTUAL
unsigned long __phys_addr(unsigned long x)
{
unsigned long phys_addr = x - PAGE_OFFSET;
/* VMALLOC_* aren't constants */
VIRTUAL_BUG_ON(x < PAGE_OFFSET);
VIRTUAL_BUG_ON(__vmalloc_start_set && is_vmalloc_addr((void *) x));
return x - PAGE_OFFSET;
/* max_low_pfn is set early, but not _that_ early */
if (max_low_pfn) {
VIRTUAL_BUG_ON((phys_addr >> PAGE_SHIFT) > max_low_pfn);
BUG_ON(slow_virt_to_phys((void *)x) != phys_addr);
}
return phys_addr;
}
EXPORT_SYMBOL(__phys_addr);
#endif

4
arch/x86/platform/efi/efi.c
View File

@ -410,8 +410,8 @@ void __init efi_reserve_boot_services(void)
* - Not within any part of the kernel
* - Not the bios reserved area
*/
if ((start+size >= virt_to_phys(_text)
&& start <= virt_to_phys(_end)) ||
if ((start+size >= __pa_symbol(_text)
&& start <= __pa_symbol(_end)) ||
!e820_all_mapped(start, start+size, E820_RAM) ||
memblock_is_region_reserved(start, size)) {
/* Could not reserve, skip it */

2
arch/x86/power/hibernate_32.c
View File

@ -129,8 +129,6 @@ static int resume_physical_mapping_init(pgd_t *pgd_base)
}
}
resume_map_numa_kva(pgd_base);
return 0;
}

4
arch/x86/realmode/init.c
View File

@ -70,9 +70,9 @@ void __init setup_real_mode(void)
__va(real_mode_header->trampoline_header);
#ifdef CONFIG_X86_32
trampoline_header->start = __pa(startup_32_smp);
trampoline_header->start = __pa_symbol(startup_32_smp);
trampoline_header->gdt_limit = __BOOT_DS + 7;
trampoline_header->gdt_base = __pa(boot_gdt);
trampoline_header->gdt_base = __pa_symbol(boot_gdt);
#else
/*
* Some AMD processors will #GP(0) if EFER.LMA is set in WRMSR