diff options
author | Christoph Hellwig <hch@lst.de> | 2019-08-21 23:58:37 +0900 |
---|---|---|
committer | Paul Walmsley <paul.walmsley@sifive.com> | 2019-09-05 01:54:51 -0700 |
commit | 95594cb40c6e013e04659f7316fbdebe83913c58 (patch) | |
tree | c76bb919d36e75cd7e1fb77d585665284694dca4 /arch/riscv/mm/tlbflush.c | |
parent | 2f12dbf190d97dc0f2f8a07269dd0d8060808539 (diff) |
riscv: move the TLB flush logic out of line
The TLB flush logic is going to become more complex. Start moving
it out of line.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
[paul.walmsley@sifive.com: fixed checkpatch whitespace warnings]
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
Diffstat (limited to 'arch/riscv/mm/tlbflush.c')
-rw-r--r-- | arch/riscv/mm/tlbflush.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/riscv/mm/tlbflush.c b/arch/riscv/mm/tlbflush.c new file mode 100644 index 000000000000..24cd33d2c48f --- /dev/null +++ b/arch/riscv/mm/tlbflush.c @@ -0,0 +1,35 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <linux/mm.h> +#include <linux/smp.h> +#include <asm/sbi.h> + +void flush_tlb_all(void) +{ + sbi_remote_sfence_vma(NULL, 0, -1); +} + +static void __sbi_tlb_flush_range(struct cpumask *cmask, unsigned long start, + unsigned long size) +{ + struct cpumask hmask; + + riscv_cpuid_to_hartid_mask(cmask, &hmask); + sbi_remote_sfence_vma(hmask.bits, start, size); +} + +void flush_tlb_mm(struct mm_struct *mm) +{ + __sbi_tlb_flush_range(mm_cpumask(mm), 0, -1); +} + +void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr) +{ + __sbi_tlb_flush_range(mm_cpumask(vma->vm_mm), addr, PAGE_SIZE); +} + +void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, + unsigned long end) +{ + __sbi_tlb_flush_range(mm_cpumask(vma->vm_mm), start, end - start); +} |