mirror of https://github.com/xemu-project/xemu.git
KVM: x86: Fix up misreported CPU features
From qemu-kvm: Kernels before 2.6.30 misreported some essential CPU features via KVM_GET_SUPPORTED_CPUID. Fix them up. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
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@ -99,12 +99,18 @@ uint32_t kvm_arch_get_supported_cpuid(CPUState *env, uint32_t function, int reg)
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break;
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case R_EDX:
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ret = cpuid->entries[i].edx;
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if (function == 0x80000001) {
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switch (function) {
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case 1:
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/* KVM before 2.6.30 misreports the following features */
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ret |= CPUID_MTRR | CPUID_PAT | CPUID_MCE | CPUID_MCA;
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break;
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case 0x80000001:
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/* On Intel, kvm returns cpuid according to the Intel spec,
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* so add missing bits according to the AMD spec:
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*/
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cpuid_1_edx = kvm_arch_get_supported_cpuid(env, 1, R_EDX);
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ret |= cpuid_1_edx & 0xdfeff7ff;
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break;
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}
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break;
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}
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