linux-kernel - Re: [PATCH] KVM: x86: allow TSC deadline timer on all hosts

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Message-ID: <54AEAF13.4050806@redhat.com>
Date:	Thu, 08 Jan 2015 17:23:47 +0100
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Radim Krčmář <rkrcmar@...hat.com>,
	linux-kernel@...r.kernel.org
CC:	kvm@...r.kernel.org, Marcelo Tosatti <mtosatti@...hat.com>
Subject: Re: [PATCH] KVM: x86: allow TSC deadline timer on all hosts



On 08/01/2015 15:59, Radim Krčmář wrote:
> Emulation does not utilize the feature.

Indeed... nice :)

Applied to kvm/queue, thanks.

Paolo

> Signed-off-by: Radim Krčmář <rkrcmar@...hat.com>
> ---
>  arch/x86/kvm/x86.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index 933a373..ed879f1 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -2743,6 +2743,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
>  	case KVM_CAP_READONLY_MEM:
>  	case KVM_CAP_HYPERV_TIME:
>  	case KVM_CAP_IOAPIC_POLARITY_IGNORED:
> +	case KVM_CAP_TSC_DEADLINE_TIMER:
>  #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
>  	case KVM_CAP_ASSIGN_DEV_IRQ:
>  	case KVM_CAP_PCI_2_3:
> @@ -2781,9 +2782,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
>  	case KVM_CAP_TSC_CONTROL:
>  		r = kvm_has_tsc_control;
>  		break;
> -	case KVM_CAP_TSC_DEADLINE_TIMER:
> -		r = boot_cpu_has(X86_FEATURE_TSC_DEADLINE_TIMER);
> -		break;
>  	default:
>  		r = 0;
>  		break;
> 
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