linux-kernel - [PATCH v6 0/4] x86/tests: Add tests for AMD SEV-ES #VC handling

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Date:   Fri, 18 Mar 2022 11:46:42 +0100
From:   Vasant Karasulli <vkarasulli@...e.de>
To:     linux-kernel@...r.kernel.org, jroedel@...e.de, kvm@...r.kernel.org
Cc:     bp@...en8.de, x86@...nel.org, thomas.lendacky@....com,
        varad.gautam@...e.com, Vasant Karasulli <vkarasulli@...e.de>
Subject: [PATCH v6 0/4] x86/tests: Add tests for AMD SEV-ES #VC handling

Hi All,

   This is the version 6 of the patch written to add tests for
   AMD SEV-ES #VC handling. This version attempts to
   address review comments to the previous version of the patch in
   https://lore.kernel.org/kvm/20220208162623.18368-1-vkarasulli@suse.de/.

   Changes in this version:
   1. The patch in the previous version is split into 4 parts.
   2. Constants in function sev_es_nae_mmio are replaced by macros.

PS: I am resending this version because I made a mistake in the subject.
Apologies for the spam.

Thanks,
Vasant


Vasant Karasulli (4):
  x86/tests: Add Kconfig options for testing AMD SEV related features.
  x86/tests: Add KUnit based tests to validate Linux's VC handling for
    instructions cpuid and wbinvd. These tests: 1. install a kretprobe
    on the #VC handler (sev_es_ghcb_hv_call, to    access GHCB
    before/after the resulting VMGEXIT). 2. trigger an NAE by executing
    either cpuid or wbinvd. 3. check that the kretprobe was hit with the
    right exit_code available    in GHCB.
  x86/tests: Add KUnit based tests to validate Linux's VC handling for
      instructions accessing registers such as MSR and DR7. These tests:
        1. install a kretprobe on the #VC handler (sev_es_ghcb_hv_call,
    to        access GHCB before/after the resulting VMGEXIT).     2.
    trigger an NAE by accessing either MSR or DR7.     3. check that the
    kretprobe was hit with the right exit_code available        in GHCB.
  x86/tests: Add KUnit based tests to validate Linux's VC handling for
          IO instructions. These tests:         1. install a kretprobe
    on the #VC handler (sev_es_ghcb_hv_call, to            access GHCB
    before/after the resulting VMGEXIT).         2. trigger an NAE by
    issuing an IO instruction.         3. check that the kretprobe was
    hit with the right exit_code available            in GHCB.

 arch/x86/Kbuild              |   2 +
 arch/x86/Kconfig.debug       |  16 ++++
 arch/x86/kernel/Makefile     |   7 ++
 arch/x86/tests/Makefile      |   3 +
 arch/x86/tests/sev-test-vc.c | 155 +++++++++++++++++++++++++++++++++++
 5 files changed, 183 insertions(+)
 create mode 100644 arch/x86/tests/Makefile
 create mode 100644 arch/x86/tests/sev-test-vc.c


base-commit: 09688c0166e76ce2fb85e86b9d99be8b0084cdf9
prerequisite-patch-id: b74bc39d7ca69ad86b5f9090047c44ab039f4622
prerequisite-patch-id: a53a291b59b4ceaffa25a9a08dfa08b5a78a01b9
--
2.32.0