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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /arch/hexagon/include/asm/tlbflush.h | |
parent | Initial commit. (diff) | |
download | linux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip |
Adding upstream version 4.19.249.upstream/4.19.249
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/hexagon/include/asm/tlbflush.h')
-rw-r--r-- | arch/hexagon/include/asm/tlbflush.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/hexagon/include/asm/tlbflush.h b/arch/hexagon/include/asm/tlbflush.h new file mode 100644 index 000000000..62d95a970 --- /dev/null +++ b/arch/hexagon/include/asm/tlbflush.h @@ -0,0 +1,58 @@ +/* + * TLB flush support for Hexagon + * + * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#ifndef _ASM_TLBFLUSH_H +#define _ASM_TLBFLUSH_H + +#include <linux/mm.h> +#include <asm/processor.h> + +/* + * TLB flushing -- in "SMP", these routines get defined to be the + * ones from smp.c, else they are some local flavors. + */ + +/* + * These functions are commonly macros, but in the interests of + * VM vs. native implementation and code size, we simply declare + * the function prototypes here. + */ +extern void tlb_flush_all(void); +extern void flush_tlb_mm(struct mm_struct *mm); +extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr); +extern void flush_tlb_range(struct vm_area_struct *vma, + unsigned long start, unsigned long end); +extern void flush_tlb_kernel_range(unsigned long start, unsigned long end); +extern void flush_tlb_one(unsigned long); + +/* + * "This is called in munmap when we have freed up some page-table pages. + * We don't need to do anything here..." + * + * The VM kernel doesn't walk page tables, and they are passed to the VMM + * by logical address. There doesn't seem to be any possibility that they + * could be referenced by the VM kernel based on a stale mapping, since + * they would only be located by consulting the mm structure, and they + * will have been purged from that structure by the munmap. Seems like + * a noop on HVM as well. + */ +#define flush_tlb_pgtables(mm, start, end) + +#endif |