mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-12 09:26:44 +07:00
b27873702b
With new refcounting we don't need to mark PMDs splitting. Let's drop code to handle this. pmdp_splitting_flush() is not needed too: on splitting PMD we will do pmdp_clear_flush() + set_pte_at(). pmdp_clear_flush() will do IPI as needed for fast_gup. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Sasha Levin <sasha.levin@oracle.com> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: Jerome Marchand <jmarchan@redhat.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Steve Capper <steve.capper@linaro.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
284 lines
9.1 KiB
C
284 lines
9.1 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1994 - 2002 by Ralf Baechle
|
|
* Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
|
|
* Copyright (C) 2002 Maciej W. Rozycki
|
|
*/
|
|
#ifndef _ASM_PGTABLE_BITS_H
|
|
#define _ASM_PGTABLE_BITS_H
|
|
|
|
|
|
/*
|
|
* Note that we shift the lower 32bits of each EntryLo[01] entry
|
|
* 6 bits to the left. That way we can convert the PFN into the
|
|
* physical address by a single 'and' operation and gain 6 additional
|
|
* bits for storing information which isn't present in a normal
|
|
* MIPS page table.
|
|
*
|
|
* Similar to the Alpha port, we need to keep track of the ref
|
|
* and mod bits in software. We have a software "yeah you can read
|
|
* from this page" bit, and a hardware one which actually lets the
|
|
* process read from the page. On the same token we have a software
|
|
* writable bit and the real hardware one which actually lets the
|
|
* process write to the page, this keeps a mod bit via the hardware
|
|
* dirty bit.
|
|
*
|
|
* Certain revisions of the R4000 and R5000 have a bug where if a
|
|
* certain sequence occurs in the last 3 instructions of an executable
|
|
* page, and the following page is not mapped, the cpu can do
|
|
* unpredictable things. The code (when it is written) to deal with
|
|
* this problem will be in the update_mmu_cache() code for the r4k.
|
|
*/
|
|
#if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32)
|
|
|
|
/*
|
|
* The following bits are implemented by the TLB hardware
|
|
*/
|
|
#define _PAGE_NO_EXEC_SHIFT 0
|
|
#define _PAGE_NO_EXEC (1 << _PAGE_NO_EXEC_SHIFT)
|
|
#define _PAGE_NO_READ_SHIFT (_PAGE_NO_EXEC_SHIFT + 1)
|
|
#define _PAGE_NO_READ (1 << _PAGE_NO_READ_SHIFT)
|
|
#define _PAGE_GLOBAL_SHIFT (_PAGE_NO_READ_SHIFT + 1)
|
|
#define _PAGE_GLOBAL (1 << _PAGE_GLOBAL_SHIFT)
|
|
#define _PAGE_VALID_SHIFT (_PAGE_GLOBAL_SHIFT + 1)
|
|
#define _PAGE_VALID (1 << _PAGE_VALID_SHIFT)
|
|
#define _PAGE_DIRTY_SHIFT (_PAGE_VALID_SHIFT + 1)
|
|
#define _PAGE_DIRTY (1 << _PAGE_DIRTY_SHIFT)
|
|
#define _CACHE_SHIFT (_PAGE_DIRTY_SHIFT + 1)
|
|
#define _CACHE_MASK (7 << _CACHE_SHIFT)
|
|
|
|
/*
|
|
* The following bits are implemented in software
|
|
*/
|
|
#define _PAGE_PRESENT_SHIFT (24)
|
|
#define _PAGE_PRESENT (1 << _PAGE_PRESENT_SHIFT)
|
|
#define _PAGE_READ_SHIFT (_PAGE_PRESENT_SHIFT + 1)
|
|
#define _PAGE_READ (1 << _PAGE_READ_SHIFT)
|
|
#define _PAGE_WRITE_SHIFT (_PAGE_READ_SHIFT + 1)
|
|
#define _PAGE_WRITE (1 << _PAGE_WRITE_SHIFT)
|
|
#define _PAGE_ACCESSED_SHIFT (_PAGE_WRITE_SHIFT + 1)
|
|
#define _PAGE_ACCESSED (1 << _PAGE_ACCESSED_SHIFT)
|
|
#define _PAGE_MODIFIED_SHIFT (_PAGE_ACCESSED_SHIFT + 1)
|
|
#define _PAGE_MODIFIED (1 << _PAGE_MODIFIED_SHIFT)
|
|
|
|
#define _PFN_SHIFT (PAGE_SHIFT - 12 + _CACHE_SHIFT + 3)
|
|
|
|
/*
|
|
* Bits for extended EntryLo0/EntryLo1 registers
|
|
*/
|
|
#define _PFNX_MASK 0xffffff
|
|
|
|
#elif defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
|
|
|
|
/*
|
|
* The following bits are implemented in software
|
|
*/
|
|
#define _PAGE_PRESENT_SHIFT (0)
|
|
#define _PAGE_PRESENT (1 << _PAGE_PRESENT_SHIFT)
|
|
#define _PAGE_READ_SHIFT (_PAGE_PRESENT_SHIFT + 1)
|
|
#define _PAGE_READ (1 << _PAGE_READ_SHIFT)
|
|
#define _PAGE_WRITE_SHIFT (_PAGE_READ_SHIFT + 1)
|
|
#define _PAGE_WRITE (1 << _PAGE_WRITE_SHIFT)
|
|
#define _PAGE_ACCESSED_SHIFT (_PAGE_WRITE_SHIFT + 1)
|
|
#define _PAGE_ACCESSED (1 << _PAGE_ACCESSED_SHIFT)
|
|
#define _PAGE_MODIFIED_SHIFT (_PAGE_ACCESSED_SHIFT + 1)
|
|
#define _PAGE_MODIFIED (1 << _PAGE_MODIFIED_SHIFT)
|
|
|
|
/*
|
|
* The following bits are implemented by the TLB hardware
|
|
*/
|
|
#define _PAGE_GLOBAL_SHIFT (_PAGE_MODIFIED_SHIFT + 4)
|
|
#define _PAGE_GLOBAL (1 << _PAGE_GLOBAL_SHIFT)
|
|
#define _PAGE_VALID_SHIFT (_PAGE_GLOBAL_SHIFT + 1)
|
|
#define _PAGE_VALID (1 << _PAGE_VALID_SHIFT)
|
|
#define _PAGE_DIRTY_SHIFT (_PAGE_VALID_SHIFT + 1)
|
|
#define _PAGE_DIRTY (1 << _PAGE_DIRTY_SHIFT)
|
|
#define _CACHE_UNCACHED_SHIFT (_PAGE_DIRTY_SHIFT + 1)
|
|
#define _CACHE_UNCACHED (1 << _CACHE_UNCACHED_SHIFT)
|
|
#define _CACHE_MASK _CACHE_UNCACHED
|
|
|
|
#define _PFN_SHIFT PAGE_SHIFT
|
|
|
|
#else
|
|
/*
|
|
* Below are the "Normal" R4K cases
|
|
*/
|
|
|
|
/*
|
|
* The following bits are implemented in software
|
|
*/
|
|
#define _PAGE_PRESENT_SHIFT 0
|
|
#define _PAGE_PRESENT (1 << _PAGE_PRESENT_SHIFT)
|
|
/* R2 or later cores check for RI/XI support to determine _PAGE_READ */
|
|
#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6)
|
|
#define _PAGE_WRITE_SHIFT (_PAGE_PRESENT_SHIFT + 1)
|
|
#define _PAGE_WRITE (1 << _PAGE_WRITE_SHIFT)
|
|
#else
|
|
#define _PAGE_READ_SHIFT (_PAGE_PRESENT_SHIFT + 1)
|
|
#define _PAGE_READ (1 << _PAGE_READ_SHIFT)
|
|
#define _PAGE_WRITE_SHIFT (_PAGE_READ_SHIFT + 1)
|
|
#define _PAGE_WRITE (1 << _PAGE_WRITE_SHIFT)
|
|
#endif
|
|
#define _PAGE_ACCESSED_SHIFT (_PAGE_WRITE_SHIFT + 1)
|
|
#define _PAGE_ACCESSED (1 << _PAGE_ACCESSED_SHIFT)
|
|
#define _PAGE_MODIFIED_SHIFT (_PAGE_ACCESSED_SHIFT + 1)
|
|
#define _PAGE_MODIFIED (1 << _PAGE_MODIFIED_SHIFT)
|
|
|
|
#if defined(CONFIG_64BIT) && defined(CONFIG_MIPS_HUGE_TLB_SUPPORT)
|
|
/* Huge TLB page */
|
|
#define _PAGE_HUGE_SHIFT (_PAGE_MODIFIED_SHIFT + 1)
|
|
#define _PAGE_HUGE (1 << _PAGE_HUGE_SHIFT)
|
|
#endif /* CONFIG_64BIT && CONFIG_MIPS_HUGE_TLB_SUPPORT */
|
|
|
|
#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6)
|
|
/* XI - page cannot be executed */
|
|
#ifdef _PAGE_HUGE_SHIFT
|
|
#define _PAGE_NO_EXEC_SHIFT (_PAGE_HUGE_SHIFT + 1)
|
|
#else
|
|
#define _PAGE_NO_EXEC_SHIFT (_PAGE_MODIFIED_SHIFT + 1)
|
|
#endif
|
|
#define _PAGE_NO_EXEC (cpu_has_rixi ? (1 << _PAGE_NO_EXEC_SHIFT) : 0)
|
|
|
|
/* RI - page cannot be read */
|
|
#define _PAGE_READ_SHIFT (_PAGE_NO_EXEC_SHIFT + 1)
|
|
#define _PAGE_READ (cpu_has_rixi ? 0 : (1 << _PAGE_READ_SHIFT))
|
|
#define _PAGE_NO_READ_SHIFT _PAGE_READ_SHIFT
|
|
#define _PAGE_NO_READ (cpu_has_rixi ? (1 << _PAGE_READ_SHIFT) : 0)
|
|
#endif /* defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6) */
|
|
|
|
#if defined(_PAGE_NO_READ_SHIFT)
|
|
#define _PAGE_GLOBAL_SHIFT (_PAGE_NO_READ_SHIFT + 1)
|
|
#elif defined(_PAGE_HUGE_SHIFT)
|
|
#define _PAGE_GLOBAL_SHIFT (_PAGE_HUGE_SHIFT + 1)
|
|
#else
|
|
#define _PAGE_GLOBAL_SHIFT (_PAGE_MODIFIED_SHIFT + 1)
|
|
#endif
|
|
#define _PAGE_GLOBAL (1 << _PAGE_GLOBAL_SHIFT)
|
|
|
|
#define _PAGE_VALID_SHIFT (_PAGE_GLOBAL_SHIFT + 1)
|
|
#define _PAGE_VALID (1 << _PAGE_VALID_SHIFT)
|
|
#define _PAGE_DIRTY_SHIFT (_PAGE_VALID_SHIFT + 1)
|
|
#define _PAGE_DIRTY (1 << _PAGE_DIRTY_SHIFT)
|
|
#define _CACHE_SHIFT (_PAGE_DIRTY_SHIFT + 1)
|
|
#define _CACHE_MASK (7 << _CACHE_SHIFT)
|
|
|
|
#define _PFN_SHIFT (PAGE_SHIFT - 12 + _CACHE_SHIFT + 3)
|
|
|
|
#endif /* defined(CONFIG_PHYS_ADDR_T_64BIT && defined(CONFIG_CPU_MIPS32) */
|
|
|
|
#ifndef _PAGE_NO_EXEC
|
|
#define _PAGE_NO_EXEC 0
|
|
#endif
|
|
#ifndef _PAGE_NO_READ
|
|
#define _PAGE_NO_READ 0
|
|
#endif
|
|
|
|
#define _PAGE_SILENT_READ _PAGE_VALID
|
|
#define _PAGE_SILENT_WRITE _PAGE_DIRTY
|
|
|
|
#define _PFN_MASK (~((1 << (_PFN_SHIFT)) - 1))
|
|
|
|
/*
|
|
* The final layouts of the PTE bits are:
|
|
*
|
|
* 64-bit, R1 or earlier: CCC D V G [S H] M A W R P
|
|
* 32-bit, R1 or earler: CCC D V G M A W R P
|
|
* 64-bit, R2 or later: CCC D V G RI/R XI [S H] M A W P
|
|
* 32-bit, R2 or later: CCC D V G RI/R XI M A W P
|
|
*/
|
|
|
|
|
|
#ifndef __ASSEMBLY__
|
|
/*
|
|
* pte_to_entrylo converts a page table entry (PTE) into a Mips
|
|
* entrylo0/1 value.
|
|
*/
|
|
static inline uint64_t pte_to_entrylo(unsigned long pte_val)
|
|
{
|
|
#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6)
|
|
if (cpu_has_rixi) {
|
|
int sa;
|
|
#ifdef CONFIG_32BIT
|
|
sa = 31 - _PAGE_NO_READ_SHIFT;
|
|
#else
|
|
sa = 63 - _PAGE_NO_READ_SHIFT;
|
|
#endif
|
|
/*
|
|
* C has no way to express that this is a DSRL
|
|
* _PAGE_NO_EXEC_SHIFT followed by a ROTR 2. Luckily
|
|
* in the fast path this is done in assembly
|
|
*/
|
|
return (pte_val >> _PAGE_GLOBAL_SHIFT) |
|
|
((pte_val & (_PAGE_NO_EXEC | _PAGE_NO_READ)) << sa);
|
|
}
|
|
#endif
|
|
|
|
return pte_val >> _PAGE_GLOBAL_SHIFT;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Cache attributes
|
|
*/
|
|
#if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
|
|
|
|
#define _CACHE_CACHABLE_NONCOHERENT 0
|
|
#define _CACHE_UNCACHED_ACCELERATED _CACHE_UNCACHED
|
|
|
|
#elif defined(CONFIG_CPU_SB1)
|
|
|
|
/* No penalty for being coherent on the SB1, so just
|
|
use it for "noncoherent" spaces, too. Shouldn't hurt. */
|
|
|
|
#define _CACHE_CACHABLE_NONCOHERENT (5<<_CACHE_SHIFT)
|
|
|
|
#elif defined(CONFIG_CPU_LOONGSON3)
|
|
|
|
/* Using COHERENT flag for NONCOHERENT doesn't hurt. */
|
|
|
|
#define _CACHE_CACHABLE_NONCOHERENT (3<<_CACHE_SHIFT) /* LOONGSON */
|
|
#define _CACHE_CACHABLE_COHERENT (3<<_CACHE_SHIFT) /* LOONGSON-3 */
|
|
|
|
#elif defined(CONFIG_MACH_INGENIC)
|
|
|
|
/* Ingenic uses the WA bit to achieve write-combine memory writes */
|
|
#define _CACHE_UNCACHED_ACCELERATED (1<<_CACHE_SHIFT)
|
|
|
|
#endif
|
|
|
|
#ifndef _CACHE_CACHABLE_NO_WA
|
|
#define _CACHE_CACHABLE_NO_WA (0<<_CACHE_SHIFT)
|
|
#endif
|
|
#ifndef _CACHE_CACHABLE_WA
|
|
#define _CACHE_CACHABLE_WA (1<<_CACHE_SHIFT)
|
|
#endif
|
|
#ifndef _CACHE_UNCACHED
|
|
#define _CACHE_UNCACHED (2<<_CACHE_SHIFT)
|
|
#endif
|
|
#ifndef _CACHE_CACHABLE_NONCOHERENT
|
|
#define _CACHE_CACHABLE_NONCOHERENT (3<<_CACHE_SHIFT)
|
|
#endif
|
|
#ifndef _CACHE_CACHABLE_CE
|
|
#define _CACHE_CACHABLE_CE (4<<_CACHE_SHIFT)
|
|
#endif
|
|
#ifndef _CACHE_CACHABLE_COW
|
|
#define _CACHE_CACHABLE_COW (5<<_CACHE_SHIFT)
|
|
#endif
|
|
#ifndef _CACHE_CACHABLE_CUW
|
|
#define _CACHE_CACHABLE_CUW (6<<_CACHE_SHIFT)
|
|
#endif
|
|
#ifndef _CACHE_UNCACHED_ACCELERATED
|
|
#define _CACHE_UNCACHED_ACCELERATED (7<<_CACHE_SHIFT)
|
|
#endif
|
|
|
|
#define __READABLE (_PAGE_SILENT_READ | _PAGE_READ | _PAGE_ACCESSED)
|
|
#define __WRITEABLE (_PAGE_SILENT_WRITE | _PAGE_WRITE | _PAGE_MODIFIED)
|
|
|
|
#define _PAGE_CHG_MASK (_PAGE_ACCESSED | _PAGE_MODIFIED | \
|
|
_PFN_MASK | _CACHE_MASK)
|
|
|
|
#endif /* _ASM_PGTABLE_BITS_H */
|