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x86/speculation: Simplify sysfs report of VMX L1TF vulnerability
Three changes to the content of the sysfs file: - If EPT is disabled, L1TF cannot be exploited even across threads on the same core, and SMT is irrelevant. - If mitigation is completely disabled, and SMT is enabled, print "vulnerable" instead of "vulnerable, SMT vulnerable" - Reorder the two parts so that the main vulnerability state comes first and the detail on SMT is second. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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@ -762,9 +762,15 @@ static ssize_t l1tf_show_state(char *buf)
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if (l1tf_vmx_mitigation == VMENTER_L1D_FLUSH_AUTO)
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return sprintf(buf, "%s\n", L1TF_DEFAULT_MSG);
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return sprintf(buf, "%s; VMX: SMT %s, L1D %s\n", L1TF_DEFAULT_MSG,
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cpu_smt_control == CPU_SMT_ENABLED ? "vulnerable" : "disabled",
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l1tf_vmx_states[l1tf_vmx_mitigation]);
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if (l1tf_vmx_mitigation == VMENTER_L1D_FLUSH_EPT_DISABLED ||
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(l1tf_vmx_mitigation == VMENTER_L1D_FLUSH_NEVER &&
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cpu_smt_control == CPU_SMT_ENABLED))
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return sprintf(buf, "%s; VMX: %s\n", L1TF_DEFAULT_MSG,
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l1tf_vmx_states[l1tf_vmx_mitigation]);
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return sprintf(buf, "%s; VMX: %s, SMT %s\n", L1TF_DEFAULT_MSG,
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l1tf_vmx_states[l1tf_vmx_mitigation],
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cpu_smt_control == CPU_SMT_ENABLED ? "vulnerable" : "disabled");
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}
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#else
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static ssize_t l1tf_show_state(char *buf)
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