linux_dsm_epyc7002/arch/openrisc/include/asm/tlb.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * OpenRISC Linux
 *
 * Linux architectural port borrowing liberally from similar works of
 * others.  All original copyrights apply as per the original source
 * declaration.
 *
 * OpenRISC implementation:
 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
 * et al.
 */

#ifndef __ASM_OPENRISC_TLB_H__
#define __ASM_OPENRISC_TLB_H__

/*
 * OpenRISC doesn't have an efficient flush_tlb_range() so use flush_tlb_mm()
 * for everything.
 */

#include <linux/pagemap.h>
#include <asm-generic/tlb.h>

#endif /* __ASM_OPENRISC_TLB_H__ */
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2019-05-27 13:55:01 +07:00			`/* SPDX-License-Identifier: GPL-2.0-or-later */`
OpenRISC: Memory management Signed-off-by: Jonas Bonn <jonas@southpole.se> Reviewed-by: Arnd Bergmann <arnd@arndb.de> 2011-06-04 15:06:11 +07:00			`/*`
			`* OpenRISC Linux`
			`*`
			`* Linux architectural port borrowing liberally from similar works of`
			`* others. All original copyrights apply as per the original source`
			`* declaration.`
			`*`
			`* OpenRISC implementation:`
			`* Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>`
			`* Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>`
			`* et al.`
			`*/`

			`#ifndef __ASM_OPENRISC_TLB_H__`
			`#define __ASM_OPENRISC_TLB_H__`

			`/*`
arch/tlb: Clean up simple architectures For the architectures that do not implement their own tlb_flush() but do already use the generic mmu_gather, there are two options: 1) the platform has an efficient flush_tlb_range() and asm-generic/tlb.h doesn't need any overrides at all. 2) the platform lacks an efficient flush_tlb_range() and we select MMU_GATHER_NO_RANGE to minimize full invalidates. Convert all 'simple' architectures to one of these two forms. alpha: has no range invalidate -> 2 arc: already used flush_tlb_range() -> 1 c6x: has no range invalidate -> 2 hexagon: has an efficient flush_tlb_range() -> 1 (flush_tlb_mm() is in fact a full range invalidate, so no need to shoot down everything) m68k: has inefficient flush_tlb_range() -> 2 microblaze: has no flush_tlb_range() -> 2 mips: has efficient flush_tlb_range() -> 1 (even though it currently seems to use flush_tlb_mm()) nds32: already uses flush_tlb_range() -> 1 nios2: has inefficient flush_tlb_range() -> 2 (no limit on range iteration) openrisc: has inefficient flush_tlb_range() -> 2 (no limit on range iteration) parisc: already uses flush_tlb_range() -> 1 sparc32: already uses flush_tlb_range() -> 1 unicore32: has inefficient flush_tlb_range() -> 2 (no limit on range iteration) xtensa: has efficient flush_tlb_range() -> 1 Note this also fixes a bug in the existing code for a number platforms. Those platforms that did: tlb_end_vma() -> if (!full_mm) flush_tlb_() tlb_flush -> if (full_mm) flush_tlb_mm() missed the case of shift_arg_pages(), which doesn't have @fullmm set, nor calls into tlb_vma(), but still frees page-tables and thus needs an invalidate. The new code handles this by detecting a non-empty range, and either issuing the matching range invalidate or a full invalidate, depending on the capabilities. No change in behavior intended. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David S. Miller <davem@davemloft.net> Cc: Greentime Hu <green.hu@gmail.com> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Helge Deller <deller@gmx.de> Cc: Jonas Bonn <jonas@southpole.se> Cc: Ley Foon Tan <lftan@altera.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mark Salter <msalter@redhat.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Nick Piggin <npiggin@gmail.com> Cc: Paul Burton <paul.burton@mips.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Richard Henderson <rth@twiddle.net> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: Rik van Riel <riel@surriel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> 2018-09-04 22:04:07 +07:00			`* OpenRISC doesn't have an efficient flush_tlb_range() so use flush_tlb_mm()`
			`* for everything.`
OpenRISC: Memory management Signed-off-by: Jonas Bonn <jonas@southpole.se> Reviewed-by: Arnd Bergmann <arnd@arndb.de> 2011-06-04 15:06:11 +07:00			`*/`

			`#include <linux/pagemap.h>`
			`#include <asm-generic/tlb.h>`

			`#endif /* __ASM_OPENRISC_TLB_H__ */`