[Qemu-commits] [qemu/qemu] ffa090: target/s390x: fix s390_probe_access to check PAGE_...

[Alex Bennée]

  Branch: refs/heads/staging
  Home:   https://github.com/qemu/qemu
  Commit: ffa090bc56e73e287a63261e70ac02c0970be61a
      
https://github.com/qemu/qemu/commit/ffa090bc56e73e287a63261e70ac02c0970be61a
  Author: Alex Bennée <alex.bennee@linaro.org>
  Date:   2021-04-23 (Fri, 23 Apr 2021)

  Changed paths:
    M target/s390x/mem_helper.c

  Log Message:
  -----------
  target/s390x: fix s390_probe_access to check PAGE_WRITE_ORG for writeability

We can remove PAGE_WRITE when (internally) marking a page read-only
because it contains translated code. This can get confused when we are
executing signal return code on signal stacks.

Fixes: e56552cf07 ("target/s390x: Implement the MVPG condition-code-option bit")
Found-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-id: 20210422154427.13038-1-alex.bennee@linaro.org
Cc: Cornelia Huck <cohuck@redhat.com>
Cc: Thomas Huth <thuth@redhat.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>