[v2,0/5] LoongArch/tcg: Add hardware page table walker support

Message

gaosong Oct. 10, 2024, 6:35 a.m. UTC

Loongson-3A6000 and newer processors have hardware page table walker
(PTW) support. PTW can handle all fastpaths of PIL/PIS/PIF/PIE
exceptions by hardware.

V2:
- Remove the '21' magic value, patch1;
- Add a flag is_debug for debug access, patch5;
- Use qatomic_cmpxchg to change the new pte_val, patch5.

Song Gao (5):
  target/loongarch: Add a new cpu_type la664
  target/loongarch: Add do_lddir/ldpte()
  target/loongarch: Add do_fill_tlb_entry()
  target/loongarch: Add get_random_tlb_index()
  target/loongarch/tcg: Add hardware page table walker support

 target/loongarch/cpu-csr.h        |   3 +
 target/loongarch/cpu.c            |  51 ++++--
 target/loongarch/cpu.h            |   1 +
 target/loongarch/cpu_helper.c     |  26 ++-
 target/loongarch/internals.h      |   4 +-
 target/loongarch/tcg/tlb_helper.c | 277 ++++++++++++++++++++++++------
 6 files changed, 293 insertions(+), 69 deletions(-)

Comments

gaosong Oct. 22, 2024, 11:56 a.m. UTC | #1

Ping!

在 2024/10/10 下午2:35, Song Gao 写道:
> Loongson-3A6000 and newer processors have hardware page table walker
> (PTW) support. PTW can handle all fastpaths of PIL/PIS/PIF/PIE
> exceptions by hardware.
>
> V2:
> - Remove the '21' magic value, patch1;
> - Add a flag is_debug for debug access, patch5;
> - Use qatomic_cmpxchg to change the new pte_val, patch5.
>
> Song Gao (5):
>    target/loongarch: Add a new cpu_type la664
>    target/loongarch: Add do_lddir/ldpte()
>    target/loongarch: Add do_fill_tlb_entry()
>    target/loongarch: Add get_random_tlb_index()
>    target/loongarch/tcg: Add hardware page table walker support
>
>   target/loongarch/cpu-csr.h        |   3 +
>   target/loongarch/cpu.c            |  51 ++++--
>   target/loongarch/cpu.h            |   1 +
>   target/loongarch/cpu_helper.c     |  26 ++-
>   target/loongarch/internals.h      |   4 +-
>   target/loongarch/tcg/tlb_helper.c | 277 ++++++++++++++++++++++++------
>   6 files changed, 293 insertions(+), 69 deletions(-)
>