diff options
author | 2016-04-11 10:41:07 +0300 | |
---|---|---|
committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/arch/arm64/include/asm/tlbflush.h | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/arm64/include/asm/tlbflush.h')
-rw-r--r-- | kernel/arch/arm64/include/asm/tlbflush.h | 96 |
1 files changed, 46 insertions, 50 deletions
diff --git a/kernel/arch/arm64/include/asm/tlbflush.h b/kernel/arch/arm64/include/asm/tlbflush.h index c3bb05b98..b460ae28e 100644 --- a/kernel/arch/arm64/include/asm/tlbflush.h +++ b/kernel/arch/arm64/include/asm/tlbflush.h @@ -28,8 +28,6 @@ * TLB Management * ============== * - * The arch/arm64/mm/tlb.S files implement these methods. - * * The TLB specific code is expected to perform whatever tests it needs * to determine if it should invalidate the TLB for each call. Start * addresses are inclusive and end addresses are exclusive; it is safe to @@ -65,6 +63,14 @@ * only require the D-TLB to be invalidated. * - kaddr - Kernel virtual memory address */ +static inline void local_flush_tlb_all(void) +{ + dsb(nshst); + asm("tlbi vmalle1"); + dsb(nsh); + isb(); +} + static inline void flush_tlb_all(void) { dsb(ishst); @@ -75,7 +81,7 @@ static inline void flush_tlb_all(void) static inline void flush_tlb_mm(struct mm_struct *mm) { - unsigned long asid = (unsigned long)ASID(mm) << 48; + unsigned long asid = ASID(mm) << 48; dsb(ishst); asm("tlbi aside1is, %0" : : "r" (asid)); @@ -85,31 +91,59 @@ static inline void flush_tlb_mm(struct mm_struct *mm) static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr) { - unsigned long addr = uaddr >> 12 | - ((unsigned long)ASID(vma->vm_mm) << 48); + unsigned long addr = uaddr >> 12 | (ASID(vma->vm_mm) << 48); dsb(ishst); - asm("tlbi vae1is, %0" : : "r" (addr)); + asm("tlbi vale1is, %0" : : "r" (addr)); dsb(ish); } +/* + * This is meant to avoid soft lock-ups on large TLB flushing ranges and not + * necessarily a performance improvement. + */ +#define MAX_TLB_RANGE (1024UL << PAGE_SHIFT) + static inline void __flush_tlb_range(struct vm_area_struct *vma, - unsigned long start, unsigned long end) + unsigned long start, unsigned long end, + bool last_level) { - unsigned long asid = (unsigned long)ASID(vma->vm_mm) << 48; + unsigned long asid = ASID(vma->vm_mm) << 48; unsigned long addr; + + if ((end - start) > MAX_TLB_RANGE) { + flush_tlb_mm(vma->vm_mm); + return; + } + start = asid | (start >> 12); end = asid | (end >> 12); dsb(ishst); - for (addr = start; addr < end; addr += 1 << (PAGE_SHIFT - 12)) - asm("tlbi vae1is, %0" : : "r"(addr)); + for (addr = start; addr < end; addr += 1 << (PAGE_SHIFT - 12)) { + if (last_level) + asm("tlbi vale1is, %0" : : "r"(addr)); + else + asm("tlbi vae1is, %0" : : "r"(addr)); + } dsb(ish); } -static inline void __flush_tlb_kernel_range(unsigned long start, unsigned long end) +static inline void flush_tlb_range(struct vm_area_struct *vma, + unsigned long start, unsigned long end) +{ + __flush_tlb_range(vma, start, end, false); +} + +static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end) { unsigned long addr; + + if ((end - start) > MAX_TLB_RANGE) { + flush_tlb_all(); + return; + } + start >>= 12; end >>= 12; @@ -121,55 +155,17 @@ static inline void __flush_tlb_kernel_range(unsigned long start, unsigned long e } /* - * This is meant to avoid soft lock-ups on large TLB flushing ranges and not - * necessarily a performance improvement. - */ -#define MAX_TLB_RANGE (1024UL << PAGE_SHIFT) - -static inline void flush_tlb_range(struct vm_area_struct *vma, - unsigned long start, unsigned long end) -{ - if ((end - start) <= MAX_TLB_RANGE) - __flush_tlb_range(vma, start, end); - else - flush_tlb_mm(vma->vm_mm); -} - -static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end) -{ - if ((end - start) <= MAX_TLB_RANGE) - __flush_tlb_kernel_range(start, end); - else - flush_tlb_all(); -} - -/* * Used to invalidate the TLB (walk caches) corresponding to intermediate page * table levels (pgd/pud/pmd). */ static inline void __flush_tlb_pgtable(struct mm_struct *mm, unsigned long uaddr) { - unsigned long addr = uaddr >> 12 | ((unsigned long)ASID(mm) << 48); + unsigned long addr = uaddr >> 12 | (ASID(mm) << 48); - dsb(ishst); asm("tlbi vae1is, %0" : : "r" (addr)); dsb(ish); } -/* - * On AArch64, the cache coherency is handled via the set_pte_at() function. - */ -static inline void update_mmu_cache(struct vm_area_struct *vma, - unsigned long addr, pte_t *ptep) -{ - /* - * set_pte() does not have a DSB for user mappings, so make sure that - * the page table write is visible. - */ - dsb(ishst); -} - -#define update_mmu_cache_pmd(vma, address, pmd) do { } while (0) #endif |