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4ad0ae8c64
This is a shim around vunmap_range, get rid of it. Move the main API comment from the _noflush variant to the normal variant, and make _noflush internal to mm/. [npiggin@gmail.com: fix nommu builds and a comment bug per sfr] Link: https://lkml.kernel.org/r/1617292598.m6g0knx24s.astroid@bobo.none [akpm@linux-foundation.org: move vunmap_range_noflush() stub inside !CONFIG_MMU, not !CONFIG_NUMA] [npiggin@gmail.com: fix nommu builds] Link: https://lkml.kernel.org/r/1617292497.o1uhq5ipxp.astroid@bobo.none Link: https://lkml.kernel.org/r/20210322021806.892164-5-npiggin@gmail.com Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Cédric Le Goater <clg@kaod.org> Cc: Uladzislau Rezki <urezki@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
120 lines
3 KiB
C
120 lines
3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <linux/mmzone.h>
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#include <linux/vmalloc.h>
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#include <asm/io-workarounds.h>
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unsigned long ioremap_bot;
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EXPORT_SYMBOL(ioremap_bot);
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void __iomem *ioremap(phys_addr_t addr, unsigned long size)
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{
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pgprot_t prot = pgprot_noncached(PAGE_KERNEL);
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void *caller = __builtin_return_address(0);
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if (iowa_is_active())
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return iowa_ioremap(addr, size, prot, caller);
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return __ioremap_caller(addr, size, prot, caller);
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}
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EXPORT_SYMBOL(ioremap);
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void __iomem *ioremap_wc(phys_addr_t addr, unsigned long size)
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{
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pgprot_t prot = pgprot_noncached_wc(PAGE_KERNEL);
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void *caller = __builtin_return_address(0);
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if (iowa_is_active())
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return iowa_ioremap(addr, size, prot, caller);
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return __ioremap_caller(addr, size, prot, caller);
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}
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EXPORT_SYMBOL(ioremap_wc);
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void __iomem *ioremap_coherent(phys_addr_t addr, unsigned long size)
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{
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pgprot_t prot = pgprot_cached(PAGE_KERNEL);
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void *caller = __builtin_return_address(0);
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if (iowa_is_active())
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return iowa_ioremap(addr, size, prot, caller);
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return __ioremap_caller(addr, size, prot, caller);
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}
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void __iomem *ioremap_prot(phys_addr_t addr, unsigned long size, unsigned long flags)
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{
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pte_t pte = __pte(flags);
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void *caller = __builtin_return_address(0);
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/* writeable implies dirty for kernel addresses */
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if (pte_write(pte))
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pte = pte_mkdirty(pte);
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/* we don't want to let _PAGE_USER and _PAGE_EXEC leak out */
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pte = pte_exprotect(pte);
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pte = pte_mkprivileged(pte);
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if (iowa_is_active())
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return iowa_ioremap(addr, size, pte_pgprot(pte), caller);
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return __ioremap_caller(addr, size, pte_pgprot(pte), caller);
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}
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EXPORT_SYMBOL(ioremap_prot);
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int early_ioremap_range(unsigned long ea, phys_addr_t pa,
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unsigned long size, pgprot_t prot)
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{
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unsigned long i;
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for (i = 0; i < size; i += PAGE_SIZE) {
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int err = map_kernel_page(ea + i, pa + i, prot);
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if (WARN_ON_ONCE(err)) /* Should clean up */
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return err;
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}
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return 0;
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}
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void __iomem *do_ioremap(phys_addr_t pa, phys_addr_t offset, unsigned long size,
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pgprot_t prot, void *caller)
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{
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struct vm_struct *area;
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int ret;
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unsigned long va;
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area = __get_vm_area_caller(size, VM_IOREMAP, IOREMAP_START, IOREMAP_END, caller);
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if (area == NULL)
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return NULL;
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area->phys_addr = pa;
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va = (unsigned long)area->addr;
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ret = ioremap_page_range(va, va + size, pa, prot);
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if (!ret)
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return (void __iomem *)area->addr + offset;
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vunmap_range(va, va + size);
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free_vm_area(area);
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return NULL;
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}
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#ifdef CONFIG_ZONE_DEVICE
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/*
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* Override the generic version in mm/memremap.c.
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*
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* With hash translation, the direct-map range is mapped with just one
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* page size selected by htab_init_page_sizes(). Consult
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* mmu_psize_defs[] to determine the minimum page size alignment.
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*/
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unsigned long memremap_compat_align(void)
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{
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unsigned int shift = mmu_psize_defs[mmu_linear_psize].shift;
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if (radix_enabled())
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return SUBSECTION_SIZE;
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return max(SUBSECTION_SIZE, 1UL << shift);
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}
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EXPORT_SYMBOL_GPL(memremap_compat_align);
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#endif
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