[0/7] target/arm: Implement FEAT_EVT

Message

Peter Maydell Oct. 28, 2022, 1:39 p.m. UTC

The architectural feature FEAT_EVT adds adds five new bits to the
HCR_EL2 register: TTLBIS, TTLBOS, TICAB, TOCU and TID4.  These allow
the guest to enable trapping of various EL1 instructions to EL2.
This patch series implements the feature and turns it on for
the 'max' CPU.

Patch 1 is a bug fix where we forgot one of the existing
trap bits when we added the new TLB maintenance operations
for FEAT_TLBIOS and FEAT_TLBRANGE.

thanks
-- PMM

Peter Maydell (7):
  target/arm: Make TLBIOS and TLBIRANGE ops trap on HCR_EL2.TTLB
  target/arm: Allow relevant HCR bits to be written for FEAT_EVT
  target/arm: Implement HCR_EL2.TTLBIS traps
  target/arm: Implement HCR_EL2.TTLBOS traps
  target/arm: Implement HCR_EL2.TICAB,TOCU traps
  target/arm: Implement HCR_EL2.TID4 traps
  target/arm: Report FEAT_EVT for TCG '-cpu max'

 docs/system/arm/emulation.rst |   1 +
 target/arm/cpu.h              |  30 +++++++
 target/arm/cpu64.c            |   1 +
 target/arm/cpu_tcg.c          |   1 +
 target/arm/helper.c           | 144 ++++++++++++++++++++++------------
 5 files changed, 126 insertions(+), 51 deletions(-)