76a345ed16
Use the generic version of arch_get_unmapped_area() which is now available at all time instead of its copy radix__arch_get_unmapped_area() To allow that for PPC64, add arch_get_mmap_base() and arch_get_mmap_end() macros. Instead of setting mm->get_unmapped_area() to either arch_get_unmapped_area() or generic_get_unmapped_area(), always set it to arch_get_unmapped_area() and call generic_get_unmapped_area() from there when radix is enabled. Do the same with radix__arch_get_unmapped_area_topdown() Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/393be1fa386446443682fdb74544d733f68ef3bb.1649523076.git.christophe.leroy@csgroup.eu
84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_POWERPC_TASK_SIZE_64_H
|
|
#define _ASM_POWERPC_TASK_SIZE_64_H
|
|
|
|
/*
|
|
* 64-bit user address space can have multiple limits
|
|
* For now supported values are:
|
|
*/
|
|
#define TASK_SIZE_64TB (0x0000400000000000UL)
|
|
#define TASK_SIZE_128TB (0x0000800000000000UL)
|
|
#define TASK_SIZE_512TB (0x0002000000000000UL)
|
|
#define TASK_SIZE_1PB (0x0004000000000000UL)
|
|
#define TASK_SIZE_2PB (0x0008000000000000UL)
|
|
|
|
/*
|
|
* With 52 bits in the address we can support up to 4PB of range.
|
|
*/
|
|
#define TASK_SIZE_4PB (0x0010000000000000UL)
|
|
|
|
/*
|
|
* For now 512TB is only supported with book3s and 64K linux page size.
|
|
*/
|
|
#ifdef CONFIG_PPC_64K_PAGES
|
|
/*
|
|
* Max value currently used:
|
|
*/
|
|
#define TASK_SIZE_USER64 TASK_SIZE_4PB
|
|
#define DEFAULT_MAP_WINDOW_USER64 TASK_SIZE_128TB
|
|
#define TASK_CONTEXT_SIZE TASK_SIZE_512TB
|
|
#else
|
|
#define TASK_SIZE_USER64 TASK_SIZE_64TB
|
|
#define DEFAULT_MAP_WINDOW_USER64 TASK_SIZE_64TB
|
|
|
|
/*
|
|
* We don't need to allocate extended context ids for 4K page size, because we
|
|
* limit the max effective address on this config to 64TB.
|
|
*/
|
|
#define TASK_CONTEXT_SIZE TASK_SIZE_64TB
|
|
#endif
|
|
|
|
/*
|
|
* 32-bit user address space is 4GB - 1 page
|
|
* (this 1 page is needed so referencing of 0xFFFFFFFF generates EFAULT
|
|
*/
|
|
#define TASK_SIZE_USER32 (0x0000000100000000UL - (1 * PAGE_SIZE))
|
|
|
|
#define TASK_SIZE (is_32bit_task() ? TASK_SIZE_USER32 : TASK_SIZE_USER64)
|
|
|
|
#define TASK_UNMAPPED_BASE_USER32 (PAGE_ALIGN(TASK_SIZE_USER32 / 4))
|
|
#define TASK_UNMAPPED_BASE_USER64 (PAGE_ALIGN(DEFAULT_MAP_WINDOW_USER64 / 4))
|
|
|
|
/*
|
|
* This decides where the kernel will search for a free chunk of vm space during
|
|
* mmap's.
|
|
*/
|
|
#define TASK_UNMAPPED_BASE \
|
|
((is_32bit_task()) ? TASK_UNMAPPED_BASE_USER32 : TASK_UNMAPPED_BASE_USER64)
|
|
|
|
/*
|
|
* Initial task size value for user applications. For book3s 64 we start
|
|
* with 128TB and conditionally enable upto 512TB
|
|
*/
|
|
#ifdef CONFIG_PPC_BOOK3S_64
|
|
#define DEFAULT_MAP_WINDOW \
|
|
((is_32bit_task()) ? TASK_SIZE_USER32 : DEFAULT_MAP_WINDOW_USER64)
|
|
#else
|
|
#define DEFAULT_MAP_WINDOW TASK_SIZE
|
|
#endif
|
|
|
|
#define STACK_TOP_USER64 DEFAULT_MAP_WINDOW_USER64
|
|
#define STACK_TOP_USER32 TASK_SIZE_USER32
|
|
#define STACK_TOP_MAX TASK_SIZE_USER64
|
|
#define STACK_TOP (is_32bit_task() ? STACK_TOP_USER32 : STACK_TOP_USER64)
|
|
|
|
#define arch_get_mmap_base(addr, base) \
|
|
(((addr) > DEFAULT_MAP_WINDOW) ? (base) + TASK_SIZE - DEFAULT_MAP_WINDOW : (base))
|
|
|
|
#define arch_get_mmap_end(addr, len, flags) \
|
|
(((addr) > DEFAULT_MAP_WINDOW) || \
|
|
(((flags) & MAP_FIXED) && ((addr) + (len) > DEFAULT_MAP_WINDOW)) ? TASK_SIZE : \
|
|
DEFAULT_MAP_WINDOW)
|
|
|
|
#endif /* _ASM_POWERPC_TASK_SIZE_64_H */
|