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qemu / qemu / b5e397a79ec874d9739e096f5e27a912d857a0ec
commitb5e397a79ec874d9739e096f5e27a912d857a0ec[log] [tgz]
authorJuergen Gross <jgross@suse.com>Fri Sep 22 14:07:24 2017 +0200
committerStefano Stabellini <sstabellini@kernel.org>Thu Oct 26 14:23:06 2017 -0700
tree21ccdd964b623fecce512bf29fa613a46f2b687f
parent325a084c1ebccb265a3c8f1dd092ffbbfb448a00 [diff]
xen: add a global indicator for grant copy being available

The Xen qdisk backend needs to test whether grant copy operations is
available in the kernel. Unfortunately this collides with using
xengnttab_set_max_grants() on some kernels as this operation has to
be the first one after opening the gnttab device.

In order to solve this problem test for the availability of grant copy
in xen_be_init() opening the gnttab device just for that purpose and
closing it again afterwards. Advertise the availability via a global
flag and use that flag in the qdisk backend.

Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
3 files changed
tree: 21ccdd964b623fecce512bf29fa613a46f2b687f
  1. accel/
  2. audio/
  3. backends/
  4. block/
  5. bsd-user/
  6. chardev/
  7. contrib/
  8. crypto/
  9. default-configs/
  10. disas/
  11. docs/
  12. fpu/
  13. fsdev/
  14. gdb-xml/
  15. hw/
  16. include/
  17. io/
  18. libdecnumber/
  19. linux-headers/
  20. linux-user/
  21. migration/
  22. nbd/
  23. net/
  24. pc-bios/
  25. po/
  26. qapi/
  27. qga/
  28. qobject/
  29. qom/
  30. replay/
  31. roms/
  32. scripts/
  33. scsi/
  34. slirp/
  35. stubs/
  36. target/
  37. tcg/
  38. tests/
  39. trace/
  40. ui/
  41. util/
  42. dtc
  43. .dir-locals.el
  44. .editorconfig
  45. .exrc
  46. .gdbinit
  47. .gitignore
  48. .gitmodules
  49. .mailmap
  50. .shippable.yml
  51. .travis.yml
  52. arch_init.c
  53. balloon.c
  54. block.c
  55. blockdev-nbd.c
  56. blockdev.c
  57. blockjob.c
  58. bootdevice.c
  59. bt-host.c
  60. bt-vhci.c
  61. Changelog
  62. CODING_STYLE
  63. configure
  64. COPYING
  65. COPYING.LIB
  66. COPYING.PYTHON
  67. cpus-common.c
  68. cpus.c
  69. device-hotplug.c
  70. device_tree.c
  71. disas.c
  72. dma-helpers.c
  73. dump.c
  74. exec.c
  75. gdbstub.c
  76. HACKING
  77. hmp-commands-info.hx
  78. hmp-commands.hx
  79. hmp.c
  80. hmp.h
  81. ioport.c
  82. iothread.c
  83. LICENSE
  84. MAINTAINERS
  85. Makefile
  86. Makefile.objs
  87. Makefile.target
  88. memory.c
  89. memory_ldst.inc.c
  90. memory_mapping.c
  91. module-common.c
  92. monitor.c
  93. numa.c
  94. os-posix.c
  95. os-win32.c
  96. qapi-schema.json
  97. qdev-monitor.c
  98. qdict-test-data.txt
  99. qemu-bridge-helper.c
  100. qemu-doc.texi
  101. qemu-ga.texi
  102. qemu-img-cmds.hx
  103. qemu-img.c
  104. qemu-img.texi
  105. qemu-io-cmds.c
  106. qemu-io.c
  107. qemu-keymap.c
  108. qemu-nbd.c
  109. qemu-nbd.texi
  110. qemu-option-trace.texi
  111. qemu-options-wrapper.h
  112. qemu-options.h
  113. qemu-options.hx
  114. qemu-seccomp.c
  115. qemu-tech.texi
  116. qemu.nsi
  117. qemu.sasl
  118. qmp.c
  119. qtest.c
  120. README
  121. replication.c
  122. replication.h
  123. rules.mak
  124. thunk.c
  125. tpm.c
  126. trace-events
  127. VERSION
  128. version.rc
  129. vl.c