On Wed, Nov 30, 2022, Paolo Bonzini wrote: > Commit 8fda37cf3d41 ("KVM: selftests: Stuff RAX/RCX with 'safe' values > in vmmcall()/vmcall()", 2022-11-21) broke the svm_nested_soft_inject_test > because it placed a "pop rbp" instruction after vmmcall. While this is > correct and mimics what is done in the VMX case, this particular test > expects a ud2 instruction right after the vmmcall, so that it can skip > over it in the L1 part of the test. > > Inline a suitably-modified version of vmmcall() to restore the > functionality of the test. > > Fixes: 8fda37cf3d41 ("KVM: selftests: Stuff RAX/RCX with 'safe' values in vmmcall()/vmcall()" > Cc: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> > Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> > --- We really, really need to save/restore guest GPRs in L1 when handling exits from L2. For now, Reviewed-by: Sean Christopherson <seanjc@xxxxxxxxxx>