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qemu / qemu / dcddc75e4756eac166bb002f71dfb09aca9b59fc
commitdcddc75e4756eac166bb002f71dfb09aca9b59fc[log] [tgz]
authorChristian Borntraeger <borntraeger@de.ibm.com>Thu Jun 02 14:06:10 2016 +0200
committerCornelia Huck <cornelia.huck@de.ibm.com>Tue Jun 14 14:00:05 2016 +0200
tree8b713d638227aab0301f75e5e1ad558dddc68643
parent06409bd91b0a40f30d2e41159627a6eb8f5ac322 [diff]
s390x: Limit s390-ccw machines to 248 CPUs

The sclp scp read info call fills in a buffer with information about the
system. With more than 248 CPUs we overflow the 4k buffer of the SCCB,
leading to random data corruption. Basically ALL guest operating systems
call scp read info, so let's limit the machines to 248 CPUs to make it
obvious that >=249 does not work.

As KVM also limits itself to 248 and TCG on s390 does not support
SMP, this should cause no regression for any user as no VMs with more
than 248 VCPUs were ever possible.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
1 file changed
tree: 8b713d638227aab0301f75e5e1ad558dddc68643
  1. audio/
  2. backends/
  3. block/
  4. bsd-user/
  5. contrib/
  6. crypto/
  7. default-configs/
  8. disas/
  9. docs/
  10. fpu/
  11. fsdev/
  12. gdb-xml/
  13. hw/
  14. include/
  15. io/
  16. libdecnumber/
  17. linux-headers/
  18. linux-user/
  19. migration/
  20. nbd/
  21. net/
  22. pc-bios/
  23. po/
  24. qapi/
  25. qga/
  26. qobject/
  27. qom/
  28. replay/
  29. roms/
  30. scripts/
  31. slirp/
  32. stubs/
  33. target-alpha/
  34. target-arm/
  35. target-cris/
  36. target-i386/
  37. target-lm32/
  38. target-m68k/
  39. target-microblaze/
  40. target-mips/
  41. target-moxie/
  42. target-openrisc/
  43. target-ppc/
  44. target-s390x/
  45. target-sh4/
  46. target-sparc/
  47. target-tilegx/
  48. target-tricore/
  49. target-unicore32/
  50. target-xtensa/
  51. tcg/
  52. tests/
  53. trace/
  54. ui/
  55. util/
  56. dtc
  57. pixman
  58. .dir-locals.el
  59. .exrc
  60. .gitignore
  61. .gitmodules
  62. .mailmap
  63. .travis.yml
  64. accel.c
  65. aio-posix.c
  66. aio-win32.c
  67. arch_init.c
  68. async.c
  69. balloon.c
  70. block.c
  71. blockdev-nbd.c
  72. blockdev.c
  73. blockjob.c
  74. bootdevice.c
  75. bt-host.c
  76. bt-vhci.c
  77. Changelog
  78. CODING_STYLE
  79. configure
  80. COPYING
  81. COPYING.LIB
  82. cpu-exec-common.c
  83. cpu-exec.c
  84. cpus.c
  85. cputlb.c
  86. device-hotplug.c
  87. device_tree.c
  88. disas.c
  89. dma-helpers.c
  90. dump.c
  91. exec.c
  92. gdbstub.c
  93. HACKING
  94. hmp-commands-info.hx
  95. hmp-commands.hx
  96. hmp.c
  97. hmp.h
  98. iohandler.c
  99. ioport.c
  100. iothread.c
  101. kvm-all.c
  102. kvm-stub.c
  103. LICENSE
  104. main-loop.c
  105. MAINTAINERS
  106. Makefile
  107. Makefile.objs
  108. Makefile.target
  109. memory.c
  110. memory_mapping.c
  111. module-common.c
  112. monitor.c
  113. numa.c
  114. os-posix.c
  115. os-win32.c
  116. page_cache.c
  117. qapi-schema.json
  118. qdev-monitor.c
  119. qdict-test-data.txt
  120. qemu-bridge-helper.c
  121. qemu-char.c
  122. qemu-doc.texi
  123. qemu-ga.texi
  124. qemu-img-cmds.hx
  125. qemu-img.c
  126. qemu-img.texi
  127. qemu-io-cmds.c
  128. qemu-io.c
  129. qemu-nbd.c
  130. qemu-nbd.texi
  131. qemu-options-wrapper.h
  132. qemu-options.h
  133. qemu-options.hx
  134. qemu-seccomp.c
  135. qemu-tech.texi
  136. qemu-timer.c
  137. qemu.nsi
  138. qemu.sasl
  139. qmp-commands.hx
  140. qmp.c
  141. qtest.c
  142. README
  143. rules.mak
  144. softmmu_template.h
  145. spice-qemu-char.c
  146. tcg-runtime.c
  147. tci.c
  148. thread-pool.c
  149. thunk.c
  150. tpm.c
  151. trace-events
  152. translate-all.c
  153. translate-all.h
  154. translate-common.c
  155. user-exec.c
  156. VERSION
  157. version.rc
  158. vl.c
  159. xen-common-stub.c
  160. xen-common.c
  161. xen-hvm-stub.c
  162. xen-hvm.c
  163. xen-mapcache.c