diff options
| author | Kefeng Wang <wangkefeng.wang@huawei.com> | 2024-09-23 21:13:51 +0800 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2024-10-16 12:01:53 +0100 |
| commit | a923705c69f7f4ebe6a5488c1f556bed12d28031 (patch) | |
| tree | c51eb05da42a4a0caceabf0c250a18f2e6c7e68f /arch/arm64 | |
| parent | 7ffc13e233951f15728c9d09db3cc8d9f6cf81f2 (diff) | |
arm64: optimize flush tlb kernel range
Currently the kernel TLBs is flushed page by page if the target
VA range is less than MAX_DVM_OPS * PAGE_SIZE, otherwise we'll
brutally issue a TLBI ALL.
But we could optimize it when CPU supports TLB range operations,
convert to use __flush_tlb_range_op() like other tlb range flush
to improve performance.
Co-developed-by: Yicong Yang <yangyicong@hisilicon.com>
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Link: https://lore.kernel.org/r/20240923131351.713304-3-wangkefeng.wang@huawei.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/include/asm/tlbflush.h | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/arch/arm64/include/asm/tlbflush.h b/arch/arm64/include/asm/tlbflush.h index 5f5e7d1f2e7d..bc94e036a26b 100644 --- a/arch/arm64/include/asm/tlbflush.h +++ b/arch/arm64/include/asm/tlbflush.h @@ -501,19 +501,21 @@ static inline void flush_tlb_range(struct vm_area_struct *vma, static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end) { - unsigned long addr; + const unsigned long stride = PAGE_SIZE; + unsigned long pages; - if ((end - start) > (MAX_DVM_OPS * PAGE_SIZE)) { + start = round_down(start, stride); + end = round_up(end, stride); + pages = (end - start) >> PAGE_SHIFT; + + if (__flush_tlb_range_limit_excess(start, end, pages, stride)) { flush_tlb_all(); return; } - start = __TLBI_VADDR(start, 0); - end = __TLBI_VADDR(end, 0); - dsb(ishst); - for (addr = start; addr < end; addr += 1 << (PAGE_SHIFT - 12)) - __tlbi(vaale1is, addr); + __flush_tlb_range_op(vaale1is, start, pages, stride, 0, + TLBI_TTL_UNKNOWN, false, lpa2_is_enabled()); dsb(ish); isb(); } |