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authorDavid Matlack <dmatlack@google.com>2022-05-20 23:32:49 +0000
committerPaolo Bonzini <pbonzini@redhat.com>2022-06-09 10:52:27 -0400
commite0f3f46e42064a51573914766897b4ab95d943e3 (patch)
tree045d2765d4665f93f3c9a9486ada18632507379e /arch/x86/kvm/vmx
parent71d489661904fcc3ec31b343acd5c0dac84b5410 (diff)
downloadlinux-e0f3f46e42064a51573914766897b4ab95d943e3.tar.bz2
KVM: selftests: Restrict test region to 48-bit physical addresses when using nested
The selftests nested code only supports 4-level paging at the moment. This means it cannot map nested guest physical addresses with more than 48 bits. Allow perf_test_util nested mode to work on hosts with more than 48 physical addresses by restricting the guest test region to 48-bits. While here, opportunistically fix an off-by-one error when dealing with vm_get_max_gfn(). perf_test_util.c was treating this as the maximum number of GFNs, rather than the maximum allowed GFN. This didn't result in any correctness issues, but it did end up shifting the test region down slightly when using huge pages. Suggested-by: Sean Christopherson <seanjc@google.com> Signed-off-by: David Matlack <dmatlack@google.com> Message-Id: <20220520233249.3776001-12-dmatlack@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx')
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