diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-02 12:21:36 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-02 12:21:36 -0700 |
commit | 94709049fb8442fb2f7b91fbec3c2897a75e18df (patch) | |
tree | f1d38ea6bc9db6d5a15ba4821c83abeb7ce7fd35 /arch/powerpc | |
parent | 17839856fd588f4ab6b789f482ed3ffd7c403e1f (diff) | |
parent | 4fba37586e4e73f9f9a855e610e151ef7da2b481 (diff) |
Merge branch 'akpm' (patches from Andrew)
Merge updates from Andrew Morton:
"A few little subsystems and a start of a lot of MM patches.
Subsystems affected by this patch series: squashfs, ocfs2, parisc,
vfs. With mm subsystems: slab-generic, slub, debug, pagecache, gup,
swap, memcg, pagemap, memory-failure, vmalloc, kasan"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (128 commits)
kasan: move kasan_report() into report.c
mm/mm_init.c: report kasan-tag information stored in page->flags
ubsan: entirely disable alignment checks under UBSAN_TRAP
kasan: fix clang compilation warning due to stack protector
x86/mm: remove vmalloc faulting
mm: remove vmalloc_sync_(un)mappings()
x86/mm/32: implement arch_sync_kernel_mappings()
x86/mm/64: implement arch_sync_kernel_mappings()
mm/ioremap: track which page-table levels were modified
mm/vmalloc: track which page-table levels were modified
mm: add functions to track page directory modifications
s390: use __vmalloc_node in stack_alloc
powerpc: use __vmalloc_node in alloc_vm_stack
arm64: use __vmalloc_node in arch_alloc_vmap_stack
mm: remove vmalloc_user_node_flags
mm: switch the test_vmalloc module to use __vmalloc_node
mm: remove __vmalloc_node_flags_caller
mm: remove both instances of __vmalloc_node_flags
mm: remove the prot argument to __vmalloc_node
mm: remove the pgprot argument to __vmalloc
...
Diffstat (limited to 'arch/powerpc')
-rw-r--r-- | arch/powerpc/include/asm/io.h | 10 | ||||
-rw-r--r-- | arch/powerpc/include/asm/pci-bridge.h | 2 | ||||
-rw-r--r-- | arch/powerpc/kernel/irq.c | 5 | ||||
-rw-r--r-- | arch/powerpc/kernel/isa-bridge.c | 28 | ||||
-rw-r--r-- | arch/powerpc/kernel/pci_64.c | 54 | ||||
-rw-r--r-- | arch/powerpc/mm/ioremap_64.c | 50 |
6 files changed, 62 insertions, 87 deletions
diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h index 635969b5b58e..13f90dd03450 100644 --- a/arch/powerpc/include/asm/io.h +++ b/arch/powerpc/include/asm/io.h @@ -699,10 +699,6 @@ static inline void iosync(void) * * * iounmap undoes such a mapping and can be hooked * - * * __ioremap_at (and the pending __iounmap_at) are low level functions to - * create hand-made mappings for use only by the PCI code and cannot - * currently be hooked. Must be page aligned. - * * * __ioremap_caller is the same as above but takes an explicit caller * reference rather than using __builtin_return_address(0) * @@ -719,6 +715,8 @@ void __iomem *ioremap_coherent(phys_addr_t address, unsigned long size); extern void iounmap(volatile void __iomem *addr); +void __iomem *ioremap_phb(phys_addr_t paddr, unsigned long size); + int early_ioremap_range(unsigned long ea, phys_addr_t pa, unsigned long size, pgprot_t prot); void __iomem *do_ioremap(phys_addr_t pa, phys_addr_t offset, unsigned long size, @@ -727,10 +725,6 @@ void __iomem *do_ioremap(phys_addr_t pa, phys_addr_t offset, unsigned long size, extern void __iomem *__ioremap_caller(phys_addr_t, unsigned long size, pgprot_t prot, void *caller); -extern void __iomem * __ioremap_at(phys_addr_t pa, void *ea, - unsigned long size, pgprot_t prot); -extern void __iounmap_at(void *ea, unsigned long size); - /* * When CONFIG_PPC_INDIRECT_PIO is set, we use the generic iomap implementation * which needs some additional definitions here. They basically allow PIO diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h index 69f4cb3b7c56..b92e81b256e5 100644 --- a/arch/powerpc/include/asm/pci-bridge.h +++ b/arch/powerpc/include/asm/pci-bridge.h @@ -66,7 +66,7 @@ struct pci_controller { void __iomem *io_base_virt; #ifdef CONFIG_PPC64 - void *io_base_alloc; + void __iomem *io_base_alloc; #endif resource_size_t io_base_phys; resource_size_t pci_io_size; diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c index 1f1169856dc8..112d150354b2 100644 --- a/arch/powerpc/kernel/irq.c +++ b/arch/powerpc/kernel/irq.c @@ -748,9 +748,8 @@ void do_IRQ(struct pt_regs *regs) static void *__init alloc_vm_stack(void) { - return __vmalloc_node_range(THREAD_SIZE, THREAD_ALIGN, VMALLOC_START, - VMALLOC_END, THREADINFO_GFP, PAGE_KERNEL, - 0, NUMA_NO_NODE, (void*)_RET_IP_); + return __vmalloc_node(THREAD_SIZE, THREAD_ALIGN, THREADINFO_GFP, + NUMA_NO_NODE, (void *)_RET_IP_); } static void __init vmap_irqstack_init(void) diff --git a/arch/powerpc/kernel/isa-bridge.c b/arch/powerpc/kernel/isa-bridge.c index 773671b512df..2257d24e6a26 100644 --- a/arch/powerpc/kernel/isa-bridge.c +++ b/arch/powerpc/kernel/isa-bridge.c @@ -18,6 +18,7 @@ #include <linux/init.h> #include <linux/mm.h> #include <linux/notifier.h> +#include <linux/vmalloc.h> #include <asm/processor.h> #include <asm/io.h> @@ -38,6 +39,22 @@ EXPORT_SYMBOL_GPL(isa_bridge_pcidev); #define ISA_SPACE_MASK 0x1 #define ISA_SPACE_IO 0x1 +static void remap_isa_base(phys_addr_t pa, unsigned long size) +{ + WARN_ON_ONCE(ISA_IO_BASE & ~PAGE_MASK); + WARN_ON_ONCE(pa & ~PAGE_MASK); + WARN_ON_ONCE(size & ~PAGE_MASK); + + if (slab_is_available()) { + if (ioremap_page_range(ISA_IO_BASE, ISA_IO_BASE + size, pa, + pgprot_noncached(PAGE_KERNEL))) + unmap_kernel_range(ISA_IO_BASE, size); + } else { + early_ioremap_range(ISA_IO_BASE, pa, size, + pgprot_noncached(PAGE_KERNEL)); + } +} + static void pci_process_ISA_OF_ranges(struct device_node *isa_node, unsigned long phb_io_base_phys) { @@ -105,15 +122,13 @@ static void pci_process_ISA_OF_ranges(struct device_node *isa_node, if (size > 0x10000) size = 0x10000; - __ioremap_at(phb_io_base_phys, (void *)ISA_IO_BASE, - size, pgprot_noncached(PAGE_KERNEL)); + remap_isa_base(phb_io_base_phys, size); return; inval_range: printk(KERN_ERR "no ISA IO ranges or unexpected isa range, " "mapping 64k\n"); - __ioremap_at(phb_io_base_phys, (void *)ISA_IO_BASE, - 0x10000, pgprot_noncached(PAGE_KERNEL)); + remap_isa_base(phb_io_base_phys, 0x10000); } @@ -248,8 +263,7 @@ void __init isa_bridge_init_non_pci(struct device_node *np) * and map it */ isa_io_base = ISA_IO_BASE; - __ioremap_at(pbase, (void *)ISA_IO_BASE, - size, pgprot_noncached(PAGE_KERNEL)); + remap_isa_base(pbase, size); pr_debug("ISA: Non-PCI bridge is %pOF\n", np); } @@ -297,7 +311,7 @@ static void isa_bridge_remove(void) isa_bridge_pcidev = NULL; /* Unmap the ISA area */ - __iounmap_at((void *)ISA_IO_BASE, 0x10000); + unmap_kernel_range(ISA_IO_BASE, 0x10000); } /** diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c index f83d1f69b1dd..d9ac980c398c 100644 --- a/arch/powerpc/kernel/pci_64.c +++ b/arch/powerpc/kernel/pci_64.c @@ -109,23 +109,47 @@ int pcibios_unmap_io_space(struct pci_bus *bus) /* Get the host bridge */ hose = pci_bus_to_host(bus); - /* Check if we have IOs allocated */ - if (hose->io_base_alloc == NULL) - return 0; - pr_debug("IO unmapping for PHB %pOF\n", hose->dn); pr_debug(" alloc=0x%p\n", hose->io_base_alloc); - /* This is a PHB, we fully unmap the IO area */ - vunmap(hose->io_base_alloc); - + iounmap(hose->io_base_alloc); return 0; } EXPORT_SYMBOL_GPL(pcibios_unmap_io_space); -static int pcibios_map_phb_io_space(struct pci_controller *hose) +void __iomem *ioremap_phb(phys_addr_t paddr, unsigned long size) { struct vm_struct *area; + unsigned long addr; + + WARN_ON_ONCE(paddr & ~PAGE_MASK); + WARN_ON_ONCE(size & ~PAGE_MASK); + + /* + * Let's allocate some IO space for that guy. We don't pass VM_IOREMAP + * because we don't care about alignment tricks that the core does in + * that case. Maybe we should due to stupid card with incomplete + * address decoding but I'd rather not deal with those outside of the + * reserved 64K legacy region. + */ + area = __get_vm_area_caller(size, 0, PHB_IO_BASE, PHB_IO_END, + __builtin_return_address(0)); + if (!area) + return NULL; + + addr = (unsigned long)area->addr; + if (ioremap_page_range(addr, addr + size, paddr, + pgprot_noncached(PAGE_KERNEL))) { + unmap_kernel_range(addr, size); + return NULL; + } + + return (void __iomem *)addr; +} +EXPORT_SYMBOL_GPL(ioremap_phb); + +static int pcibios_map_phb_io_space(struct pci_controller *hose) +{ unsigned long phys_page; unsigned long size_page; unsigned long io_virt_offset; @@ -146,12 +170,11 @@ static int pcibios_map_phb_io_space(struct pci_controller *hose) * with incomplete address decoding but I'd rather not deal with * those outside of the reserved 64K legacy region. */ - area = __get_vm_area(size_page, 0, PHB_IO_BASE, PHB_IO_END); - if (area == NULL) + hose->io_base_alloc = ioremap_phb(phys_page, size_page); + if (!hose->io_base_alloc) return -ENOMEM; - hose->io_base_alloc = area->addr; - hose->io_base_virt = (void __iomem *)(area->addr + - hose->io_base_phys - phys_page); + hose->io_base_virt = hose->io_base_alloc + + hose->io_base_phys - phys_page; pr_debug("IO mapping for PHB %pOF\n", hose->dn); pr_debug(" phys=0x%016llx, virt=0x%p (alloc=0x%p)\n", @@ -159,11 +182,6 @@ static int pcibios_map_phb_io_space(struct pci_controller *hose) pr_debug(" size=0x%016llx (alloc=0x%016lx)\n", hose->pci_io_size, size_page); - /* Establish the mapping */ - if (__ioremap_at(phys_page, area->addr, size_page, - pgprot_noncached(PAGE_KERNEL)) == NULL) - return -ENOMEM; - /* Fixup hose IO resource */ io_virt_offset = pcibios_io_space_offset(hose); hose->io_resource.start += io_virt_offset; diff --git a/arch/powerpc/mm/ioremap_64.c b/arch/powerpc/mm/ioremap_64.c index 50a99d9684f7..ba5cbb0d66bd 100644 --- a/arch/powerpc/mm/ioremap_64.c +++ b/arch/powerpc/mm/ioremap_64.c @@ -4,56 +4,6 @@ #include <linux/slab.h> #include <linux/vmalloc.h> -/** - * Low level function to establish the page tables for an IO mapping - */ -void __iomem *__ioremap_at(phys_addr_t pa, void *ea, unsigned long size, pgprot_t prot) -{ - int ret; - unsigned long va = (unsigned long)ea; - - /* We don't support the 4K PFN hack with ioremap */ - if (pgprot_val(prot) & H_PAGE_4K_PFN) - return NULL; - - if ((ea + size) >= (void *)IOREMAP_END) { - pr_warn("Outside the supported range\n"); - return NULL; - } - - WARN_ON(pa & ~PAGE_MASK); - WARN_ON(((unsigned long)ea) & ~PAGE_MASK); - WARN_ON(size & ~PAGE_MASK); - - if (slab_is_available()) { - ret = ioremap_page_range(va, va + size, pa, prot); - if (ret) - unmap_kernel_range(va, size); - } else { - ret = early_ioremap_range(va, pa, size, prot); - } - - if (ret) - return NULL; - - return (void __iomem *)ea; -} -EXPORT_SYMBOL(__ioremap_at); - -/** - * Low level function to tear down the page tables for an IO mapping. This is - * used for mappings that are manipulated manually, like partial unmapping of - * PCI IOs or ISA space. - */ -void __iounmap_at(void *ea, unsigned long size) -{ - WARN_ON(((unsigned long)ea) & ~PAGE_MASK); - WARN_ON(size & ~PAGE_MASK); - - unmap_kernel_range((unsigned long)ea, size); -} -EXPORT_SYMBOL(__iounmap_at); - void __iomem *__ioremap_caller(phys_addr_t addr, unsigned long size, pgprot_t prot, void *caller) { |