Some tlb instructions get the tlb_ps from tlb->misc but the
 value may has been initialized to 0,just check the tlb_e skip
 the function and check_tlb_ps write a log.

For LoongArch th min tlb_ps is 12(4KB), for TLB code,
the tlb_ps may be 0,this may case UndefinedBehavior
Add a check-tlb_ps fuction to check tlb_ps,
to make sure the tlb_ps is avalablie. we check tlb_ps
when get the tlb_ps from tlb->misc or CSR bits.
1. cpu reset.
   set CSR_PWCL.PTBASE and CSR_STLBPS.PS bits a default value
   from CSR_PRCFG2;
2. tlb instructions.
   some tlb instructions get  the tlb_ps from tlb->misc but the
   value may  has been initialized to 0. we need just check the tlb_e
   skip the function and check tlb_ps write a guest log.
3. csrwr instructions.
   to make sure CSR_PWCL.PTBASE and CSR_STLBPS.PS bits are avalable,
   cheke theses bits and set a default value from CSR_PRCFG2.


v6:
  1 clean code. fix code style.
  2 rebase and R-b.

V5:
  1 Add add chek_ps() function to check tlb_ps with CSR_PRCFG2;
  2 Some tlb instuctions, just check tlb_ps, do't rewrite the tlb_ps
  bits  just write a guest log;
  3 remove csrwr crmd helper function and crmd check PWCL and check CSR_STLBPS.just
chcek PWCL and STLBPS when csrwr CSR_PWCL and CSR_STLBPS;
  4 set CSR_PWCL.PTBASE and CSR_STLBPS.PS bits a default value
   from CSR_PRCFG2 when cpu reset.
V4:
1.Get the default tlb_ps value from env->CSR_PRCFG2.
2.Some tlb  instrucions check the tlb_ps such as tlbfill/tlbwr/invtlb.
3.check_tlb_ps()just check CSR_PWCL.PTBASE bits and CSR_STLBPS.PS bits.
don't check all tlb->misc.

v3:
remove some tlb instruction chek MMU on PG model, because on DA model
also can use tlb instructions.

v2:
check-tlb_ps when write CSR_PWCL and CSR_STLBPS;
some tlb instructions check CRMD PG model when clear/read/write the tlb.
link to patch: https://patchew.org/QEMU/20250220012226.2182174-1-gaosong@loongson.cn/

Thanks.
Song Gao

Song Gao (2):
  target/loongarch: fix 'make check-functional' failed
  target/loongarch: check tlb_ps

 target/loongarch/cpu.c                        | 10 +++-
 target/loongarch/cpu_helper.c                 |  8 ++-
 target/loongarch/helper.h                     |  1 +
 target/loongarch/internals.h                  |  2 +
 target/loongarch/tcg/csr_helper.c             | 30 +++++++++-
 .../tcg/insn_trans/trans_privileged.c.inc     |  1 +
 target/loongarch/tcg/tlb_helper.c             | 55 ++++++++++++++++++-
 7 files changed, 99 insertions(+), 8 deletions(-)

-- 
2.34.1