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kvm: Add KVM_GET_EMULATED_CPUID

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Add a kvm ioctl which states which system functionality kvm emulates.
The format used is that of CPUID and we return the corresponding CPUID
bits set for which we do emulate functionality.

Make sure ->padding is being passed on clean from userspace so that we
can use it for something in the future, after the ioctl gets cast in
stone.

s/kvm_dev_ioctl_get_supported_cpuid/kvm_dev_ioctl_get_cpuid/ while at
it.

Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Borislav Petkov
2013-09-22 16:44:50 +02:00
committed by Paolo Bonzini
parent 5bb3398dd2
commit 9c15bb1d0a
6 changed files with 139 additions and 17 deletions
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6
arch/x86/include/uapi/asm/kvm.h
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@@ -211,9 +211,9 @@ struct kvm_cpuid_entry2 {
__u32 padding[3];
};
#define KVM_CPUID_FLAG_SIGNIFCANT_INDEX 1
#define KVM_CPUID_FLAG_STATEFUL_FUNC 2
#define KVM_CPUID_FLAG_STATE_READ_NEXT 4
#define KVM_CPUID_FLAG_SIGNIFCANT_INDEX BIT(0)
#define KVM_CPUID_FLAG_STATEFUL_FUNC BIT(1)
#define KVM_CPUID_FLAG_STATE_READ_NEXT BIT(2)
/* for KVM_SET_CPUID2 */
struct kvm_cpuid2 {