[PATCH 0/3] s390x: Add snippet support

[Janosch Frank <frankja@linux.ibm.com>]

The SIE support allows us to run guests and test the hypervisor's
(V)SIE implementation. However it requires that the guest instructions
are binary which limits the complexity of the guest code.

The snippet support provides a way to write guest code as ASM or C and
simply memcpy it into guest memory. Some of the KVM-unit-test library
can be re-used which further speeds up guest code development.

The included mvpg-sie test helped us to deliver the KVM mvpg fixes
which Claudio posted a short while ago. In the future I'll post Secure
Execution snippet support patches which was my initial goal with this
series anyway.

RFC -> V1:
    * Replaced handle_validity() with assert()
    * Added clearing of registers before sigp in cstart.S
    * Added a nice way to compile the snippets

Janosch Frank (2):
  s390x: snippets: Add gitignore as well as linker script and start
    assembly
  s390x: mvpg: Add SIE mvpg test

Steffen Eiden (1):
  s390x: snippets: Add snippet compilation

 .gitignore                      |   1 +
 s390x/Makefile                  |  29 ++++--
 s390x/mvpg-sie.c                | 150 ++++++++++++++++++++++++++++++++
 s390x/snippets/c/cstart.S       |  15 ++++
 s390x/snippets/c/flat.lds       |  51 +++++++++++
 s390x/snippets/c/mvpg-snippet.c |  33 +++++++
 s390x/unittests.cfg             |   3 +
 7 files changed, 276 insertions(+), 6 deletions(-)
 create mode 100644 s390x/mvpg-sie.c
 create mode 100644 s390x/snippets/c/cstart.S
 create mode 100644 s390x/snippets/c/flat.lds
 create mode 100644 s390x/snippets/c/mvpg-snippet.c

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2.27.0