204c91eff7
The guest_code of sync_regs_test is assuming that the compiler will not touch %r11 outside the asm that increments it, which is a bit brittle. Instead, we can increment a variable and use a dummy asm to ensure the increment is not optimized away. However, we also need to use a callee-save register or the compiler will insert a save/restore around the vmexit, breaking the whole idea behind the test. (Yes, "if it ain't broken...", but I would like the test to be clean before it is copied into the upcoming s390 selftests). Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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