[Qemu-devel] [PATCH v2 0/7] tcg: probe_write() refactorings

[David Hildenbrand <david@redhat.com>]

Based on tcg-next. The last two patches from v1 are now part of
"[PATCH 0/6] exec: Cleanup watchpoints" from richard.

Fix and refactore some things around probe_write() in s390x code. Introduce
probe_write() for CONFIG_USER_ONLY.

This is the first step of some changes necessary to handle fault-safe
access accross multiple pages on s390x. The next step is making
probe_write() return an address, similar to tlb_vaddr_to_host(), and
introduing probe_read().

v1 -> v2:
- "tcg: Factor out CONFIG_USER_ONLY probe_write() from s390x code"
-- Perform only a single !guest_addr_valid(addr) check.
- "tcg: Enforce single page access in probe_write()"
-- Also add the check for CONFIG_USER_ONLY

Cc: Richard Henderson <rth@twiddle.net>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Riku Voipio <riku.voipio@iki.fi>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Aleksandar Markovic <amarkovic@wavecomp.com>
Cc: Aleksandar Rikalo <arikalo@wavecomp.com>
Cc: Cornelia Huck <cohuck@redhat.com>

David Hildenbrand (7):
  s390x/tcg: Use guest_addr_valid() instead of h2g_valid() in
    probe_write_access()
  s390x/tcg: Fix length calculation in probe_write_access()
  tcg: Factor out CONFIG_USER_ONLY probe_write() from s390x code
  tcg: Enforce single page access in probe_write()
  mips/tcg: Call probe_write() for CONFIG_USER_ONLY as well
  hppa/tcg: Call probe_write() also for CONFIG_USER_ONLY
  s390x/tcg: Pass a size to probe_write() in do_csst()

 accel/tcg/cputlb.c        |  2 ++
 accel/tcg/user-exec.c     | 17 +++++++++++++++++
 include/exec/exec-all.h   |  4 ++--
 target/hppa/op_helper.c   |  2 --
 target/mips/op_helper.c   |  8 +++-----
 target/s390x/mem_helper.c | 13 ++-----------
 6 files changed, 26 insertions(+), 20 deletions(-)

-- 
2.21.0