diff options
| author |   Sean Christopherson <seanjc@google.com> | 2022-05-03 14:48:59 -0700 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2022-06-11 11:47:26 -0400 |
| commit | 38081d28835c84e73ff414f23663d57946cc2234 (patch) | |
| tree | b55a3683ab6f0b615782fbca0f156c6cadec7013 /tools/testing/selftests/kvm | |
| parent | KVM: selftests: Move per-VM/per-vCPU nr pages calculation to __vm_create() (diff) | |
| download | linux-dev-38081d28835c84e73ff414f23663d57946cc2234.tar.xz linux-dev-38081d28835c84e73ff414f23663d57946cc2234.zip | |
KVM: selftests: Trust that MAXPHYADDR > memslot0 in vmx_apic_access_test
Use vm->max_gfn to compute the highest gpa in vmx_apic_access_test, and
blindly trust that the highest gfn/gpa will be well above the memory
carved out for memslot0. The existing check is beyond paranoid; KVM
doesn't support CPUs with host.MAXPHYADDR < 32, and the selftests are all
kinds of hosed if memslot0 overlaps the local xAPIC, which resides above
"lower" (below 4gb) DRAM.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/testing/selftests/kvm')
| -rw-r--r-- | tools/testing/selftests/kvm/x86_64/vmx_apic_access_test.c | 9 |
1 files changed, 1 insertions, 8 deletions
diff --git a/tools/testing/selftests/kvm/x86_64/vmx_apic_access_test.c b/tools/testing/selftests/kvm/x86_64/vmx_apic_access_test.c index ef7514376b1e..ccb05ef7234e 100644 --- a/tools/testing/selftests/kvm/x86_64/vmx_apic_access_test.c +++ b/tools/testing/selftests/kvm/x86_64/vmx_apic_access_test.c @@ -72,8 +72,6 @@ static void l1_guest_code(struct vmx_pages *vmx_pages, unsigned long high_gpa) int main(int argc, char *argv[]) { unsigned long apic_access_addr = ~0ul; - unsigned int paddr_width; - unsigned int vaddr_width; vm_vaddr_t vmx_pages_gva; unsigned long high_gpa; struct vmx_pages *vmx; @@ -86,12 +84,7 @@ int main(int argc, char *argv[]) vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code); - kvm_get_cpu_address_width(&paddr_width, &vaddr_width); - high_gpa = (1ul << paddr_width) - getpagesize(); - if ((unsigned long)DEFAULT_GUEST_PHY_PAGES * getpagesize() > high_gpa) { - print_skip("No unbacked physical page available"); - exit(KSFT_SKIP); - } + high_gpa = (vm->max_gfn - 1) << vm->page_shift; vmx = vcpu_alloc_vmx(vm, &vmx_pages_gva); prepare_virtualize_apic_accesses(vmx, vm); |