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[PATCH v3 00/18] target/arm: sve load/store improvements

From: Richard Henderson
Subject: [PATCH v3 00/18] target/arm: sve load/store improvements
Date: Tue, 21 Apr 2020 21:32:51 -0700

Because there was a separate v2 of one of the patches,
avoid confusion and call the whole thing v3.

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 3 drops cpu_probe_watchpoint, because while adding new
documentation I found we already had cpu_watchpoint_address_matches
which could do the job.


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     |  277 ++++-
 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       |  247 +++-
 exec.c                      |    2 +-
 target/arm/sve_helper.c     | 2237 +++++++++++++++++++----------------
 target/arm/translate-sve.c  |   17 +-
 11 files changed, 1985 insertions(+), 1327 deletions(-)


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