Hi all, I send a v2 even I got not a lot of answers for v1 because: 1 I forgot the kvm-unit-test header 2 the patch on uv.h was very bad 3 I saw some stupid errors I can correct myself like to zero the allocated page before use or free it on error. That said, here what is done: To adapt the CSS I/O tests to protected virtualisation we need utilities to: 1- allocate the I/O buffers in a private page (patch 3) It must be in a dedicated page to avoid exporting code or guest private data to the host. 2- share the I/O buffer with the host (patch 2) 3- be sure to allocate memory under 2Gb (patch 1) The 3 first patches are the implementation of the tools, patch 4 is the modification of the css.c test for PV. regards, Pierre Pierre Morel (4): memory: allocation in low memory s390x: pv: implement routine to share/unshare memory s390x: define UV compatible I/O allocation s390x: css: pv: css test adaptation for PV lib/alloc_dma_page.c | 57 +++++++++++++++++++++++++++++++++++++++++++ lib/alloc_dma_page.h | 24 ++++++++++++++++++ lib/s390x/asm/uv.h | 50 +++++++++++++++++++++++++++++++++++++ lib/s390x/css.h | 3 +-- lib/s390x/css_lib.c | 28 ++++++--------------- lib/s390x/malloc_io.c | 49 +++++++++++++++++++++++++++++++++++++ lib/s390x/malloc_io.h | 18 ++++++++++++++ lib/s390x/sclp.c | 2 ++ s390x/Makefile | 2 ++ s390x/css.c | 35 +++++++++++++++++--------- 10 files changed, 235 insertions(+), 33 deletions(-) create mode 100644 lib/alloc_dma_page.c create mode 100644 lib/alloc_dma_page.h create mode 100644 lib/s390x/malloc_io.c create mode 100644 lib/s390x/malloc_io.h -- 2.25.1 changelog: from v1: - add the kvm-unit-test header - correct checks for errors on Set/Remove Shared Access - Add report for uv Set/Remove Shared Access - zero the allocated I/O page before use - free the page on error.
