[Qemu-commits] [qemu/qemu] 360e60: address_space_translate: do not cross page boundar...

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/qemu/qemu
  Commit: 360e607b88a23d378f6efaa769c76d26f538234d
      
https://github.com/qemu/qemu/commit/360e607b88a23d378f6efaa769c76d26f538234d
  Author: Stefano Stabellini <address@hidden>
  Date:   2014-01-30 (Thu, 30 Jan 2014)

  Changed paths:
    M exec.c

  Log Message:
  -----------
  address_space_translate: do not cross page boundaries

The following commit:

commit 149f54b53b7666a3facd45e86eece60ce7d3b114
Author: Paolo Bonzini <address@hidden>
Date:   Fri May 24 12:59:37 2013 +0200

    memory: add address_space_translate

breaks Xen support in QEMU, in particular the Xen mapcache. The effect
is that one Windows XP installation out of ten would end up with BSOD.

The reason is that after this commit l in address_space_rw can span a
page boundary, however qemu_get_ram_ptr still calls xen_map_cache asking
to map a single page (if block->offset == 0).

Fix the issue by reverting to the previous behaviour: do not return a
length from address_space_translate_internal that can span a page
boundary.

Also in address_space_translate do not ignore the length returned by
address_space_translate_internal.

This patch should be backported to QEMU 1.6.x.

Signed-off-by: Stefano Stabellini <address@hidden>
Signed-off-by: Anthony Perard <address@hidden>
Tested-by: Paolo Bonzini <address@hidden>
Acked-by: Paolo Bonzini <address@hidden>
Cc: address@hidden


  Commit: bd88091cfbc3627ac436b5a554340cd263c93b56
      
https://github.com/qemu/qemu/commit/bd88091cfbc3627ac436b5a554340cd263c93b56
  Author: Peter Maydell <address@hidden>
  Date:   2014-02-01 (Sat, 01 Feb 2014)

  Changed paths:
    M exec.c

  Log Message:
  -----------
  Merge remote-tracking branch 'remotes/sstabellini/xen-140130' into staging

* remotes/sstabellini/xen-140130:
  address_space_translate: do not cross page boundaries

Signed-off-by: Peter Maydell <address@hidden>


Compare: https://github.com/qemu/qemu/compare/89e4a51ca954...bd88091cfbc3