linux-kernel - [PATCH gmem 0/5] KVM: selftests: Fix multiple memslots in conv test

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Message-ID: <20231023191532.2405326-1-seanjc@google.com>
Date:   Mon, 23 Oct 2023 12:15:27 -0700
From:   Sean Christopherson <seanjc@...gle.com>
To:     Sean Christopherson <seanjc@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Michael Roth <michael.roth@....com>
Subject: [PATCH gmem 0/5] KVM: selftests: Fix multiple memslots in conv test

Rework the private memory conversions selftest to allow the user to specify
a (somewhat) arbitrary number of memslots instead of testing only '1' or
"nr_vcpus" memslots.  Creating more memslots than vCPUs is particuarly
interesting as it results in a single vCPU's data chunk being spread across
multiple memslots, which in turn results in the test changing attributes
across multiple memslots in a single KVM_SET_MEMORY_ATTRIBUTES.

This also fixes the issues reported by Mike where the test would crash when
run with multiple vCPUs and a single memslot.

Sean Christopherson (5):
  KVM: selftests: Rework fallocate() helper to work across multiple
    memslots
  KVM: selftests: Handle memslot splits in private mem conversions test
  KVM: selftests: Let user specify nr of memslots in private mem
    conversion
  KVM: selftests: Use dedicated pattern for testing that mem is shared
    by default
  KVM: selftests: Verify default pattern was written in private mem
    conversion

 tools/testing/selftests/kvm/lib/kvm_util.c    | 34 ++++----
 .../kvm/x86_64/private_mem_conversions_test.c | 87 +++++++++++--------
 2 files changed, 69 insertions(+), 52 deletions(-)

base-commit: 911b515af3ec5f53992b9cc162cf7d3893c2fbe2
-- 
2.42.0.758.gaed0368e0e-goog