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x86/mm: thread pgprot_t through init_memory_mapping()

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In preparation to support a pgprot_t argument for arch_add_memory().

It's required to move the prototype of init_memory_mapping() seeing the
original location came before the definition of pgprot_t.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: David Hildenbrand <david@redhat.com>
Cc: Eric Badger <ebadger@gigaio.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Will Deacon <will@kernel.org>
Link: http://lkml.kernel.org/r/20200306170846.9333-4-logang@deltatee.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Logan Gunthorpe 2020-04-10 14:33:24 -07:00 committed by Linus Torvalds
parent f5637d3b42
commit c164fbb40c
8 changed files with 34 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/x86/include/asm/page_types.h
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@ -71,9 +71,6 @@ static inline phys_addr_t get_max_mapped(void)
bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn);
extern unsigned long init_memory_mapping(unsigned long start,
unsigned long end);
extern void initmem_init(void);
#endif /* !__ASSEMBLY__ */

3
arch/x86/include/asm/pgtable.h
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@ -1081,6 +1081,9 @@ static inline void __meminit init_trampoline_default(void)
void __init poking_init(void);
unsigned long init_memory_mapping(unsigned long start,
unsigned long end, pgprot_t prot);
# ifdef CONFIG_RANDOMIZE_MEMORY
void __meminit init_trampoline(void);
# else

3
arch/x86/kernel/amd_gart_64.c
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@ -744,7 +744,8 @@ int __init gart_iommu_init(void)
start_pfn = PFN_DOWN(aper_base);
if (!pfn_range_is_mapped(start_pfn, end_pfn))
init_memory_mapping(start_pfn<<PAGE_SHIFT, end_pfn<<PAGE_SHIFT);
init_memory_mapping(start_pfn<<PAGE_SHIFT, end_pfn<<PAGE_SHIFT,
PAGE_KERNEL);
pr_info("PCI-DMA: using GART IOMMU.\n");
iommu_size = check_iommu_size(info.aper_base, aper_size);

9
arch/x86/mm/init.c
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@ -467,7 +467,7 @@ bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn)
* the physical memory. To access them they are temporarily mapped.
*/
unsigned long __ref init_memory_mapping(unsigned long start,
unsigned long end)
unsigned long end, pgprot_t prot)
{
struct map_range mr[NR_RANGE_MR];
unsigned long ret = 0;
@ -481,7 +481,8 @@ unsigned long __ref init_memory_mapping(unsigned long start,
for (i = 0; i < nr_range; i++)
ret = kernel_physical_mapping_init(mr[i].start, mr[i].end,
mr[i].page_size_mask);
mr[i].page_size_mask,
prot);
add_pfn_range_mapped(start >> PAGE_SHIFT, ret >> PAGE_SHIFT);
@ -521,7 +522,7 @@ static unsigned long __init init_range_memory_mapping(
*/
can_use_brk_pgt = max(start, (u64)pgt_buf_end<<PAGE_SHIFT) >=
min(end, (u64)pgt_buf_top<<PAGE_SHIFT);
init_memory_mapping(start, end);
init_memory_mapping(start, end, PAGE_KERNEL);
mapped_ram_size += end - start;
can_use_brk_pgt = true;
}
@ -661,7 +662,7 @@ void __init init_mem_mapping(void)
#endif
/* the ISA range is always mapped regardless of memory holes */
init_memory_mapping(0, ISA_END_ADDRESS);
init_memory_mapping(0, ISA_END_ADDRESS, PAGE_KERNEL);
/* Init the trampoline, possibly with KASLR memory offset */
init_trampoline();

3
arch/x86/mm/init_32.c
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@ -257,7 +257,8 @@ static inline int __is_kernel_text(unsigned long addr)
unsigned long __init
kernel_physical_mapping_init(unsigned long start,
unsigned long end,
unsigned long page_size_mask)
unsigned long page_size_mask,
pgprot_t prot)
{
int use_pse = page_size_mask == (1<<PG_LEVEL_2M);
unsigned long last_map_addr = end;

32
arch/x86/mm/init_64.c
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@ -585,7 +585,7 @@ phys_pmd_init(pmd_t *pmd_page, unsigned long paddr, unsigned long paddr_end,
*/
static unsigned long __meminit
phys_pud_init(pud_t *pud_page, unsigned long paddr, unsigned long paddr_end,
unsigned long page_size_mask, bool init)
unsigned long page_size_mask, pgprot_t _prot, bool init)
{
unsigned long pages = 0, paddr_next;
unsigned long paddr_last = paddr_end;
@ -595,7 +595,7 @@ phys_pud_init(pud_t *pud_page, unsigned long paddr, unsigned long paddr_end,
for (; i < PTRS_PER_PUD; i++, paddr = paddr_next) {
pud_t *pud;
pmd_t *pmd;
pgprot_t prot = PAGE_KERNEL;
pgprot_t prot = _prot;
vaddr = (unsigned long)__va(paddr);
pud = pud_page + pud_index(vaddr);
@ -644,9 +644,12 @@ phys_pud_init(pud_t *pud_page, unsigned long paddr, unsigned long paddr_end,
if (page_size_mask & (1<<PG_LEVEL_1G)) {
pages++;
spin_lock(&init_mm.page_table_lock);
prot = __pgprot(pgprot_val(prot) | __PAGE_KERNEL_LARGE);
set_pte_init((pte_t *)pud,
pfn_pte((paddr & PUD_MASK) >> PAGE_SHIFT,
PAGE_KERNEL_LARGE),
prot),
init);
spin_unlock(&init_mm.page_table_lock);
paddr_last = paddr_next;
@ -669,7 +672,7 @@ phys_pud_init(pud_t *pud_page, unsigned long paddr, unsigned long paddr_end,
static unsigned long __meminit
phys_p4d_init(p4d_t *p4d_page, unsigned long paddr, unsigned long paddr_end,
unsigned long page_size_mask, bool init)
unsigned long page_size_mask, pgprot_t prot, bool init)
{
unsigned long vaddr, vaddr_end, vaddr_next, paddr_next, paddr_last;
@ -679,7 +682,7 @@ phys_p4d_init(p4d_t *p4d_page, unsigned long paddr, unsigned long paddr_end,
if (!pgtable_l5_enabled())
return phys_pud_init((pud_t *) p4d_page, paddr, paddr_end,
page_size_mask, init);
page_size_mask, prot, init);
for (; vaddr < vaddr_end; vaddr = vaddr_next) {
p4d_t *p4d = p4d_page + p4d_index(vaddr);
@ -702,13 +705,13 @@ phys_p4d_init(p4d_t *p4d_page, unsigned long paddr, unsigned long paddr_end,
if (!p4d_none(*p4d)) {
pud = pud_offset(p4d, 0);
paddr_last = phys_pud_init(pud, paddr, __pa(vaddr_end),
page_size_mask, init);
page_size_mask, prot, init);
continue;
}
pud = alloc_low_page();
paddr_last = phys_pud_init(pud, paddr, __pa(vaddr_end),
page_size_mask, init);
page_size_mask, prot, init);
spin_lock(&init_mm.page_table_lock);
p4d_populate_init(&init_mm, p4d, pud, init);
@ -722,7 +725,7 @@ static unsigned long __meminit
__kernel_physical_mapping_init(unsigned long paddr_start,
unsigned long paddr_end,
unsigned long page_size_mask,
bool init)
pgprot_t prot, bool init)
{
bool pgd_changed = false;
unsigned long vaddr, vaddr_start, vaddr_end, vaddr_next, paddr_last;
@ -743,13 +746,13 @@ __kernel_physical_mapping_init(unsigned long paddr_start,
paddr_last = phys_p4d_init(p4d, __pa(vaddr),
__pa(vaddr_end),
page_size_mask,
init);
prot, init);
continue;
}
p4d = alloc_low_page();
paddr_last = phys_p4d_init(p4d, __pa(vaddr), __pa(vaddr_end),
page_size_mask, init);
page_size_mask, prot, init);
spin_lock(&init_mm.page_table_lock);
if (pgtable_l5_enabled())
@ -778,10 +781,10 @@ __kernel_physical_mapping_init(unsigned long paddr_start,
unsigned long __meminit
kernel_physical_mapping_init(unsigned long paddr_start,
unsigned long paddr_end,
unsigned long page_size_mask)
unsigned long page_size_mask, pgprot_t prot)
{
return __kernel_physical_mapping_init(paddr_start, paddr_end,
page_size_mask, true);
page_size_mask, prot, true);
}
/*
@ -796,7 +799,8 @@ kernel_physical_mapping_change(unsigned long paddr_start,
unsigned long page_size_mask)
{
return __kernel_physical_mapping_init(paddr_start, paddr_end,
page_size_mask, false);
page_size_mask, PAGE_KERNEL,
false);
}
#ifndef CONFIG_NUMA
@ -863,7 +867,7 @@ int arch_add_memory(int nid, u64 start, u64 size,
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
init_memory_mapping(start, start + size);
init_memory_mapping(start, start + size, PAGE_KERNEL);
return add_pages(nid, start_pfn, nr_pages, params);
}

3
arch/x86/mm/mm_internal.h
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@ -12,7 +12,8 @@ void early_ioremap_page_table_range_init(void);
unsigned long kernel_physical_mapping_init(unsigned long start,
unsigned long end,
unsigned long page_size_mask);
unsigned long page_size_mask,
pgprot_t prot);
unsigned long kernel_physical_mapping_change(unsigned long start,
unsigned long end,
unsigned long page_size_mask);

3
arch/x86/platform/uv/bios_uv.c
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@ -352,7 +352,8 @@ void __iomem *__init efi_ioremap(unsigned long phys_addr, unsigned long size,
if (type == EFI_MEMORY_MAPPED_IO)
return ioremap(phys_addr, size);
last_map_pfn = init_memory_mapping(phys_addr, phys_addr + size);
last_map_pfn = init_memory_mapping(phys_addr, phys_addr + size,
PAGE_KERNEL);
if ((last_map_pfn << PAGE_SHIFT) < phys_addr + size) {
unsigned long top = last_map_pfn << PAGE_SHIFT;
efi_ioremap(top, size - (top - phys_addr), type, attribute);