Fix nx_huge_pages_test when run on TDP-disabled hosts by mapping the test region with huge pages in the VM so that KVM can shadow it with huge pages. Patches 1 and 2 are precursor patches to add the necessary infrastructure to check if TDP is enabled or not. v3: - Skip the selftest if a module param file cannot be opened [Sean] - Add wrappers for reading kvm_intel and kvm_amd params [Sean] - Small renames and error reporting cleanups [Sean] - Decrease sysfs path array from 1024 to 128 bytes [me] v2: https://lore.kernel.org/kvm/20220928184853.1681781-1-dmatlack@xxxxxxxxxx/ - Still use 4K mappins on TDP-enabled hosts [Sean] - Generalize virt_map_2m() to virt_map_level() [me] - Pass nr_bytes instead of nr_pages to virt_map_level() [Sean] v1: https://lore.kernel.org/kvm/20220926175219.605113-1-dmatlack@xxxxxxxxxx/ David Matlack (3): KVM: selftests: Tell the compiler that code after TEST_FAIL() is unreachable KVM: selftests: Add helpers to read kvm_{intel,amd} boolean module parameters KVM: selftests: Fix nx_huge_pages_test on TDP-disabled hosts .../selftests/kvm/include/kvm_util_base.h | 4 ++ .../testing/selftests/kvm/include/test_util.h | 6 ++- .../selftests/kvm/include/x86_64/processor.h | 4 ++ tools/testing/selftests/kvm/lib/kvm_util.c | 39 ++++++++++++++++++ .../selftests/kvm/lib/x86_64/processor.c | 40 +++++++++++++------ .../selftests/kvm/x86_64/nx_huge_pages_test.c | 19 ++++++++- 6 files changed, 96 insertions(+), 16 deletions(-) base-commit: 372d07084593dc7a399bf9bee815711b1fb1bcf2 prerequisite-patch-id: 2e3661ba8856c29b769499bac525b6943d9284b8 -- 2.38.0.rc1.362.ged0d419d3c-goog
