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Subject[PATCH] KVM: X86: Expose KVM_HINTS_REALTIME in KVM_GET_SUPPORTED_CPUID
Date
From: Wanpeng Li <wanpengli@tencent.com>

Per KVM_GET_SUPPORTED_CPUID ioctl documentation:

This ioctl returns x86 cpuid features which are supported by both the
hardware and kvm in its default configuration.

A well-behaved userspace should not set the bit if it is not supported.

Suggested-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
---
arch/x86/kvm/cpuid.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 06a278b..225d251 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -789,7 +789,7 @@ static inline int __do_cpuid_func(struct kvm_cpuid_array *array, u32 function)

entry->ebx = 0;
entry->ecx = 0;
- entry->edx = 0;
+ entry->edx = (1 << KVM_HINTS_REALTIME);
break;
case 0x80000000:
entry->eax = min(entry->eax, 0x8000001f);
--
2.7.4
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