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target-i386: kvm: Report kvm_pv_unhalt as unsupported w/o kernel_irqchip 

The kvm_pv_unhalt feature doesn't work if kernel_irqchip is
disabled, so we need to report it as unsupported.

Tested-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Eduardo Habkost 2016-08-12 15:14:32 -03:00
parent 1dc8a6695c
commit 648774779a
1 changed files with 7 additions and 0 deletions
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target-i386/kvm.c
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@ -329,6 +329,13 @@ uint32_t kvm_arch_get_supported_cpuid(KVMState *s, uint32_t function,
*/ */
cpuid_1_edx = kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX); cpuid_1_edx = kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX);
ret |= cpuid_1_edx & CPUID_EXT2_AMD_ALIASES; ret |= cpuid_1_edx & CPUID_EXT2_AMD_ALIASES;
} else if (function == KVM_CPUID_FEATURES && reg == R_EAX) {
/* kvm_pv_unhalt is reported by GET_SUPPORTED_CPUID, but it can't
* be enabled without the in-kernel irqchip
*/
if (!kvm_irqchip_in_kernel()) {
ret &= ~(1U << KVM_FEATURE_PV_UNHALT);
}
} }
/* fallback for older kernels */ /* fallback for older kernels */