[kvm-unit-tests PATCH 0/8] s390x: sie: Add PV snippet support

Janosch Frank
2021-11-23T10:40:14Z

Adding PV virtualization support was only a matter of time so here it
is.

The biggest problem that needed solving was having the SE header as a
separate file. The genprotimg tool generates the header and adds a
short bit of code to the image which will put the guest into PV mode
via the diagnose 308 PV subcodes. We don't have and want an emulation
for the diagnose so we don't support this way of starting a PV guest.

Therefore we needed a new tool that generates the PV image separate
from the SE header so we can link both as binary blobs. Marc created
this tool by writing a library which lets users create a SE header and
has bindings to multiple languages. Unfortunately we didn't yet have
time to upstream this but we plan to publish it once we find some.

The first PV snippet test checks the "easy" diagnose calls 0x44, 0x9c,
0x288 and 0x500. We check register contents and responses to PGM
injects.

A huge thanks goes out to Steffen and Marc who helped me make this
possible.

Janosch Frank (8):
lib: s390x: sie: Add sca allocation and freeing
s390x: sie: Add PV fields to SIE control block
s390x: sie: Add UV information into VM struct
s390x: uv: Add more UV call functions
s390x: lib: Extend UV library with PV guest management
lib: s390: sie: Add PV guest register handling
s390x: snippets: Add PV support
s390x: sie: Add PV diag test

.gitignore | 2 +
configure | 8 +
lib/s390x/asm/uv.h | 99 +++++++++
lib/s390x/sie.c | 20 ++
lib/s390x/sie.h | 54 ++++-
lib/s390x/snippet.h | 7 +
lib/s390x/uv.c | 128 +++++++++++
lib/s390x/uv.h | 7 +
s390x/Makefile | 74 ++++++-
s390x/pv-diags.c | 240 +++++++++++++++++++++
s390x/snippets/asm/snippet-pv-diag-288.S | 25 +++
s390x/snippets/asm/snippet-pv-diag-500.S | 39 ++++
s390x/snippets/asm/snippet-pv-diag-yield.S | 7 +
13 files changed, 692 insertions(+), 18 deletions(-)
create mode 100644 s390x/pv-diags.c
create mode 100644 s390x/snippets/asm/snippet-pv-diag-288.S
create mode 100644 s390x/snippets/asm/snippet-pv-diag-500.S
create mode 100644 s390x/snippets/asm/snippet-pv-diag-yield.S

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2.32.0