Method get_cpu_vendor

hypervisor/src/hypervisor.rs:162–181

Determine CPU vendor

(&self)

    /// Determine CPU vendor
    ///
    fn get_cpu_vendor(&self) -> CpuVendor {
        #[allow(unused_unsafe)]
        // SAFETY: not actually unsafe, but considered unsafe by current stable
        unsafe {
            let leaf = x86_64::__cpuid(0x0);

            if leaf.ebx == 0x756e_6547 && leaf.ecx == 0x6c65_746e && leaf.edx == 0x4965_6e69 {
                // Vendor string GenuineIntel
                CpuVendor::Intel
            } else if leaf.ebx == 0x6874_7541 && leaf.ecx == 0x444d_4163 && leaf.edx == 0x6974_6e65
            {
                // Vendor string AuthenticAMD
                CpuVendor::AMD
            } else {
                // Not known yet, the corresponding manufacturer manual should contain the
                // necessary info. See also https://wiki.osdev.org/CPUID#CPU_Vendor_ID_String
                CpuVendor::default()
            }
        }
    }

    /// This function enables the AMX related TILECFG and TILEDATA state components for guests.
    ///