The goal here is to support MTE, but there's some cleanup to do.
Technically, we have sufficient interfaces in cputlb.c now, but it
requires multiple tlb lookups on different interfaces to do so.
Adding probe_access_flags() allows probing the tlb and getting out
some of the flags buried in the tlb comparator, such as TLB_MMIO
and TLB_WATCHPOINT. In addition, we get no-fault semantics,
which we don't have via probe_acccess().
Looking forward to MTE, we can examine the Tagged bit on a per-page
basis and avoid dozens of mte_check calls that must be Unchecked.
That comes later, in a new version of the MTE patch set, but I do
add comments for where the checks should be added.
Version 4 addresses some review comments.
Only 2 patches still unreviewed:
0004-accel-tcg-Add-probe_access_flags.patch
0013-target-arm-Update-contiguous-first-fault-and-no-f.patch
r~
Richard Henderson (18):
exec: Add block comments for watchpoint routines
exec: Fix cpu_watchpoint_address_matches address length
accel/tcg: Add block comment for probe_access
accel/tcg: Add probe_access_flags
accel/tcg: Add endian-specific cpu_{ld,st}* operations
target/arm: Use cpu_*_data_ra for sve_ldst_tlb_fn
target/arm: Drop manual handling of set/clear_helper_retaddr
target/arm: Add sve infrastructure for page lookup
target/arm: Adjust interface of sve_ld1_host_fn
target/arm: Use SVEContLdSt in sve_ld1_r
target/arm: Handle watchpoints in sve_ld1_r
target/arm: Use SVEContLdSt for multi-register contiguous loads
target/arm: Update contiguous first-fault and no-fault loads
target/arm: Use SVEContLdSt for contiguous stores
target/arm: Reuse sve_probe_page for gather first-fault loads
target/arm: Reuse sve_probe_page for scatter stores
target/arm: Reuse sve_probe_page for gather loads
target/arm: Remove sve_memopidx
docs/devel/loads-stores.rst | 39 +-
include/exec/cpu-all.h | 13 +-
include/exec/cpu_ldst.h | 283 +++--
include/exec/exec-all.h | 39 +
include/hw/core/cpu.h | 23 +
target/arm/internals.h | 5 -
accel/tcg/cputlb.c | 413 ++++---
accel/tcg/user-exec.c | 256 +++-
exec.c | 2 +-
target/arm/sve_helper.c | 2241 +++++++++++++++++++----------------
target/arm/translate-sve.c | 17 +-
11 files changed, 1999 insertions(+), 1332 deletions(-)
--
2.20.1
