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To support kmap_atomic_prot() on all architectures each arch must support protections passed in to them. Change csky, mips, nds32 and xtensa to use their global constant kmap_prot rather than a hard coded value which was equal. Signed-off-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Andy Lutomirski <luto@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Christian König <christian.koenig@amd.com> Cc: Chris Zankel <chris@zankel.net> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Helge Deller <deller@gmx.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20200507150004.1423069-10-ira.weiny@intel.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2005-2017 Andes Technology Corporation
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#include <linux/export.h>
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#include <linux/highmem.h>
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#include <linux/sched.h>
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#include <linux/smp.h>
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#include <linux/interrupt.h>
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#include <linux/memblock.h>
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#include <asm/fixmap.h>
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#include <asm/tlbflush.h>
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void *kmap_atomic_high(struct page *page)
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{
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unsigned int idx;
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unsigned long vaddr, pte;
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int type;
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pte_t *ptep;
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type = kmap_atomic_idx_push();
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idx = type + KM_TYPE_NR * smp_processor_id();
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vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
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pte = (page_to_pfn(page) << PAGE_SHIFT) | (kmap_prot);
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ptep = pte_offset_kernel(pmd_off_k(vaddr), vaddr);
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set_pte(ptep, pte);
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__nds32__tlbop_inv(vaddr);
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__nds32__mtsr_dsb(vaddr, NDS32_SR_TLB_VPN);
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__nds32__tlbop_rwr(pte);
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__nds32__isb();
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return (void *)vaddr;
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}
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EXPORT_SYMBOL(kmap_atomic_high);
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void kunmap_atomic_high(void *kvaddr)
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{
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if (kvaddr >= (void *)FIXADDR_START) {
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unsigned long vaddr = (unsigned long)kvaddr;
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pte_t *ptep;
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kmap_atomic_idx_pop();
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__nds32__tlbop_inv(vaddr);
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__nds32__isb();
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ptep = pte_offset_kernel(pmd_off_k(vaddr), vaddr);
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set_pte(ptep, 0);
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}
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}
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EXPORT_SYMBOL(kunmap_atomic_high);
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