Finally posting the testcase for the fix to back !visible roots with a dummy root[*]. The testcase is very simple: point EP4TA at MMIO (TPM base), do VM-Enter, and expect the VM to not die. [*] https://lore.kernel.org/all/20230729005200.1057358-6-seanjc@xxxxxxxxxx Sean Christopherson (3): nVMX: Use helpers to check for WB memtype and 4-level EPT support nVMX: Use setup_dummy_ept() to configure EPT for test_ept_eptp() test nVMX: Add a testcase for running L2 with EP4TA that points at MMIO x86/vmx_tests.c | 31 ++++++++++++++----------------- 1 file changed, 14 insertions(+), 17 deletions(-) base-commit: d4fba74a42d222d2cfdde65351fac3531a1d6f5c -- 2.42.0.283.g2d96d420d3-goog
