[Xen-devel] [PATCH v5] Livepatch fixes and general features for Xen 4.8.

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

Hey!

Since v4: 
[https://lists.xenproject.org/archives/html/xen-devel/2016-08/msg02705.html]
 - Committed Acked/Reviewed patches.
 - Discarded couple of patches to address later.
Since v3: [https://lists.xen.org/archives/html/xen-devel/2016-08/msg01825.html]
 - Acked on reviews
v2, v1:
 - Left over fixes and features that didn't get quite done in 4.7

Included are:
 - Bug-fixes
 - NOP patching

The first two deal with .bss and replace the "livepatch: Clear .bss when
payload is reverted" which was posted in v4:

 [PATCH v5 1/4] livepatch/docs: Document .bss not being cleared, and
 [PATCH v5 2/4] livepatch: Add limit of 2MB to payload .bss sections.

The NOP patching mechanism is updated per Jan's thinking:
 [PATCH v5 3/4] livepatch: NOP if func->new_addr is zero.

And the last one was slighty changed since the Review done in v4 (ditched
the BUG_ON test-case as .bss can have old values) so will need one more review.
 [PATCH v5 4/4] livepach: Add .livepatch.hooks functions and test-case

Thanks!

The git tree `

 git://xenbits.xen.org/people/konradwilk/xen.git livepatch.v4.8.v5

contains all the following patches (and more):

Konrad Rzeszutek Wilk (3):
      livepatch/docs: Document .bss not being cleared, and .data potentially 
having changed values
      livepatch: Add limit of 2MB to payload .bss sections.
      livepatch: NOP if func->new_addr is zero.

Ross Lagerwall (1):
      livepach: Add .livepatch.hooks functions and test-case

 docs/misc/livepatch.markdown        | 36 +++++++++++++++++++++++--
 xen/arch/x86/alternative.c          |  2 +-
 xen/arch/x86/livepatch.c            | 38 +++++++++++++++++---------
 xen/arch/x86/test/xen_hello_world.c | 30 +++++++++++++++++++++
 xen/common/livepatch.c              | 53 +++++++++++++++++++++++++++++++++++--
 xen/common/livepatch_elf.c          | 10 ++++++-
 xen/include/asm-x86/alternative.h   |  1 +
 xen/include/asm-x86/livepatch.h     | 21 +++++++++++++++
 xen/include/xen/livepatch.h         |  9 +++++++
 xen/include/xen/livepatch_payload.h | 49 ++++++++++++++++++++++++++++++++++
 10 files changed, 230 insertions(+), 19 deletions(-)

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