kvm-unit-tests/x86/syscall.c

18     asm volatile("pushf; syscall; syscall_target: popf" : "=c"(tmp) : : "r11");  in test_syscall_lazy_load()
25  * test handling of TF in syscall/sysret: #DB is raised if TF
26  * is 1 at the *end* of syscall/sysret.
28  * This uses 32-bit syscall/sysret because KVM emulates it on Intel processors.
29  * However, the same bug happens with 64-bit syscall/sysret if two vCPUs
30  * "race" to force the emulation of syscall/sysret.
55     "   syscall\n"  /* singlestep trap taken after syscall */
56     "   syscall\n"  /* jumps back to test_syscall_tf's body */
75      *   syscall to syscall32_target -> TF cleared and no singlestep  in test_syscall_tf()
78      *   syscall to syscall32_target  in test_syscall_tf()
84      *   syscall to syscall32_target, TF cleared and wrong singlestep exception  in test_syscall_tf()
102     report(code_segment_upon_db == USER_CS32, "syscall TF handling");  in test_syscall_tf()
112         report_skip("syscall TF handling");  in main()