riscv: Fixup asid_allocator remaining issues

From: Guo Ren <[email protected]>

The patchset fixes the remaining problems of asid_allocator.
- Fixup _PAGE_GLOBAL for kernel virtual address mapping
- Optimize tlb_flush with asid & range

Changes since v4:
- Fixup double PAGE_SIZE add in local_flush_tlb_range_asid
- Add tlbflush: Optimize coding convention
- Optimize comment

Changes since v3:
- Optimize coding convention for
"riscv: Use use_asid_allocator flush TLB"

Changes since v2:
- Remove PAGE_UP/DOWN usage in tlbflush.h
- Optimize variable name

Changes since v1:
- Drop PAGE_UP wrong fixup
- Rebase on clean linux-5.13-rc2
- Add Reviewed-by

Guo Ren (3):
riscv: Use global mappings for kernel pages
riscv: Add ASID-based tlbflushing methods
riscv: tlbflush: Optimize coding convention

 arch/riscv/include/asm/mmu_context.h |  2 ++
 arch/riscv/include/asm/pgtable.h     |  3 +-
 arch/riscv/include/asm/tlbflush.h    | 22 ++++++++++++++
 arch/riscv/mm/context.c              |  2 +-
 arch/riscv/mm/tlbflush.c             | 57 ++++++++++++++++++++++++++++--------
 5 files changed, 71 insertions(+), 15 deletions(-)

2.7.4