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author | Linus Torvalds | 2014-09-01 02:08:42 +0200 |
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committer | Linus Torvalds | 2014-09-01 02:08:42 +0200 |
commit | 05bdb8c90e9973ca5f1d338a697f9582b11a27e2 (patch) | |
tree | 3a4acaea1941d8b0e41e79a2d33b96ec31e628f9 /arch/xtensa/include/asm/page.h | |
parent | unicore32: Fix build error (diff) | |
parent | Merge tag 'xtensa-for-next-20140815' into for_next (diff) | |
download | kernel-qcow2-linux-05bdb8c90e9973ca5f1d338a697f9582b11a27e2.tar.gz kernel-qcow2-linux-05bdb8c90e9973ca5f1d338a697f9582b11a27e2.tar.xz kernel-qcow2-linux-05bdb8c90e9973ca5f1d338a697f9582b11a27e2.zip |
Merge tag 'xtensa-20140830' of git://github.com/czankel/xtensa-linux
Pull Xtensa updates from Chris Zankel:
"Xtensa improvements for 3.17:
- support highmem on cores with aliasing data cache. Enable highmem
on kc705 by default
- simplify addition of new core variants (no need to modify Kconfig /
Makefiles)
- improve robustness of unaligned access handler and its interaction
with window overflow/underflow exception handlers
- deprecate atomic and spill registers syscalls
- clean up Kconfig: remove orphan MATH_EMULATION, sort 'select'
statements
- wire up renameat2 syscall.
Various fixes:
- fix address checks in dma_{alloc,free}_coherent (runtime BUG)
- fix access to THREAD_RA/THREAD_SP/THREAD_DS (debug build breakage)
- fix TLBTEMP_BASE_2 region handling in fast_second_level_miss
(runtime unrecoverable exception)
- fix a6 and a7 handling in fast_syscall_xtensa (runtime userspace
register clobbering)
- fix kernel/user jump out of fast_unaligned (potential runtime
unrecoverabl exception)
- replace termios IOCTL code definitions with constants (userspace
build breakage)"
* tag 'xtensa-20140830' of git://github.com/czankel/xtensa-linux: (25 commits)
xtensa: deprecate fast_xtensa and fast_spill_registers syscalls
xtensa: don't allow overflow/underflow on unaligned stack
xtensa: fix a6 and a7 handling in fast_syscall_xtensa
xtensa: allow single-stepping through unaligned load/store
xtensa: move invalid unaligned instruction handler closer to its users
xtensa: make fast_unaligned store restartable
xtensa: add double exception fixup handler for fast_unaligned
xtensa: fix kernel/user jump out of fast_unaligned
xtensa: configure kc705 for highmem
xtensa: support highmem in aliasing cache flushing code
xtensa: support aliasing cache in kmap
xtensa: support aliasing cache in k[un]map_atomic
xtensa: implement clear_user_highpage and copy_user_highpage
xtensa: fix TLBTEMP_BASE_2 region handling in fast_second_level_miss
xtensa: allow fixmap and kmap span more than one page table
xtensa: make fixmap region addressing grow with index
xtensa: fix access to THREAD_RA/THREAD_SP/THREAD_DS
xtensa: add renameat2 syscall
xtensa: fix address checks in dma_{alloc,free}_coherent
xtensa: replace IOCTL code definitions with constants
...
Diffstat (limited to 'arch/xtensa/include/asm/page.h')
-rw-r--r-- | arch/xtensa/include/asm/page.h | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/arch/xtensa/include/asm/page.h b/arch/xtensa/include/asm/page.h index 47f582333f6b..abe24c6f8b2f 100644 --- a/arch/xtensa/include/asm/page.h +++ b/arch/xtensa/include/asm/page.h @@ -78,7 +78,9 @@ # define DCACHE_ALIAS_EQ(a,b) ((((a) ^ (b)) & DCACHE_ALIAS_MASK) == 0) #else # define DCACHE_ALIAS_ORDER 0 +# define DCACHE_ALIAS(a) ((void)(a), 0) #endif +#define DCACHE_N_COLORS (1 << DCACHE_ALIAS_ORDER) #if ICACHE_WAY_SIZE > PAGE_SIZE # define ICACHE_ALIAS_ORDER (ICACHE_WAY_SHIFT - PAGE_SHIFT) @@ -134,6 +136,7 @@ static inline __attribute_const__ int get_order(unsigned long size) #endif struct page; +struct vm_area_struct; extern void clear_page(void *page); extern void copy_page(void *to, void *from); @@ -143,8 +146,15 @@ extern void copy_page(void *to, void *from); */ #if DCACHE_WAY_SIZE > PAGE_SIZE -extern void clear_user_page(void*, unsigned long, struct page*); -extern void copy_user_page(void*, void*, unsigned long, struct page*); +extern void clear_page_alias(void *vaddr, unsigned long paddr); +extern void copy_page_alias(void *to, void *from, + unsigned long to_paddr, unsigned long from_paddr); + +#define clear_user_highpage clear_user_highpage +void clear_user_highpage(struct page *page, unsigned long vaddr); +#define __HAVE_ARCH_COPY_USER_HIGHPAGE +void copy_user_highpage(struct page *to, struct page *from, + unsigned long vaddr, struct vm_area_struct *vma); #else # define clear_user_page(page, vaddr, pg) clear_page(page) # define copy_user_page(to, from, vaddr, pg) copy_page(to, from) |