a4184174be
All EV4 machines are already gone, and the remaining EV5 based machines all support the slightly more modern EV56 generation as well. Debian only supports EV56 and later. Drop both of these and build kernels optimized for EV56 and higher when the "generic" options is selected, tuning for an out-of-order EV6 pipeline, same as Debian userspace. Since this was the only supported architecture without 8-bit and 16-bit stores, common kernel code no longer has to worry about aligning struct members, and existing workarounds from the block and tty layers can be removed. The alpha memory management code no longer needs an abstraction for the differences between EV4 and EV5+. Link: https://lists.debian.org/debian-alpha/2023/05/msg00009.html Acked-by: Paul E. McKenney <paulmck@kernel.org> Acked-by: Matt Turner <mattst88@gmail.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
120 lines
2.6 KiB
C
120 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ALPHA_TLBFLUSH_H
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#define _ALPHA_TLBFLUSH_H
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#include <linux/mm.h>
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#include <linux/sched.h>
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#include <asm/compiler.h>
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#ifndef __EXTERN_INLINE
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#define __EXTERN_INLINE extern inline
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#define __MMU_EXTERN_INLINE
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#endif
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extern void __load_new_mm_context(struct mm_struct *);
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__EXTERN_INLINE void
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ev5_flush_tlb_current(struct mm_struct *mm)
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{
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__load_new_mm_context(mm);
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}
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/* Flush just one page in the current TLB set. We need to be very
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careful about the icache here, there is no way to invalidate a
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specific icache page. */
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__EXTERN_INLINE void
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ev5_flush_tlb_current_page(struct mm_struct * mm,
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struct vm_area_struct *vma,
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unsigned long addr)
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{
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if (vma->vm_flags & VM_EXEC)
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__load_new_mm_context(mm);
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else
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tbi(2, addr);
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}
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#define flush_tlb_current ev5_flush_tlb_current
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#define flush_tlb_current_page ev5_flush_tlb_current_page
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#ifdef __MMU_EXTERN_INLINE
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#undef __EXTERN_INLINE
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#undef __MMU_EXTERN_INLINE
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#endif
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/* Flush current user mapping. */
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static inline void
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flush_tlb(void)
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{
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flush_tlb_current(current->active_mm);
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}
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/* Flush someone else's user mapping. */
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static inline void
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flush_tlb_other(struct mm_struct *mm)
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{
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unsigned long *mmc = &mm->context[smp_processor_id()];
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/* Check it's not zero first to avoid cacheline ping pong
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when possible. */
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if (*mmc) *mmc = 0;
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}
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#ifndef CONFIG_SMP
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/* Flush everything (kernel mapping may also have changed
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due to vmalloc/vfree). */
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static inline void flush_tlb_all(void)
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{
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tbia();
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}
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/* Flush a specified user mapping. */
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static inline void
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flush_tlb_mm(struct mm_struct *mm)
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{
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if (mm == current->active_mm)
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flush_tlb_current(mm);
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else
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flush_tlb_other(mm);
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}
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/* Page-granular tlb flush. */
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static inline void
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flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
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{
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struct mm_struct *mm = vma->vm_mm;
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if (mm == current->active_mm)
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flush_tlb_current_page(mm, vma, addr);
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else
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flush_tlb_other(mm);
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}
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/* Flush a specified range of user mapping. On the Alpha we flush
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the whole user tlb. */
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static inline void
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flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
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unsigned long end)
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{
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flush_tlb_mm(vma->vm_mm);
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}
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#else /* CONFIG_SMP */
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extern void flush_tlb_all(void);
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extern void flush_tlb_mm(struct mm_struct *);
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extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
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extern void flush_tlb_range(struct vm_area_struct *, unsigned long,
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unsigned long);
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#endif /* CONFIG_SMP */
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static inline void flush_tlb_kernel_range(unsigned long start,
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unsigned long end)
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{
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flush_tlb_all();
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}
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#endif /* _ALPHA_TLBFLUSH_H */
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