Glauber de Oliveira Costa wrote:
> This is the host part of kvm clocksource implementation. As it does
> not include clockevents, it is a fairly simple implementation. We
> only have to register a per-vcpu area, and start writting to it periodically.
>
> The area is binary compatible with xen, as we use the same shadow_info
> structure.
>
> diff --git a/include/asm-x86/kvm_para.h b/include/asm-x86/kvm_para.h
> index c6f3fd8..abe412a 100644
> --- a/include/asm-x86/kvm_para.h
> +++ b/include/asm-x86/kvm_para.h
> @@ -1,5 +1,6 @@
> #ifndef __X86_KVM_PARA_H
> #define __X86_KVM_PARA_H
> +#include <xen/interface/xen.h>
Can we abstract that out into a neutral header instead of including the
Xen headers directly in KVM. Please rename the structure too to
something neutral.
Including something as generic as xen/interface/xen.h when CONFIG_XEN
may not be set is not a good thing, I believe.
Regards,
Anthony Liguori
>
> /* This CPUID returns the signature 'KVMKVMKVM' in ebx, ecx, and edx. It
> * should be used to determine that a VM is running under KVM.
> @@ -10,9 +11,13 @@
> * paravirtualization, the appropriate feature bit should be checked.
> */
> #define KVM_CPUID_FEATURES 0x40000001
> +#define KVM_FEATURE_CLOCKSOURCE 0
>
> +#define MSR_PARAVIRT_CLOCK 0x11
> #ifdef __KERNEL__
> #include <asm/processor.h>
> +extern void kvmclock_init(void);
> +
>
> /* This instruction is vmcall. On non-VT architectures, it will generate a
> * trap that we will then rewrite to the appropriate instruction.
> diff --git a/include/linux/kvm.h b/include/linux/kvm.h
> index 4de4fd2..78ce53f 100644
> --- a/include/linux/kvm.h
> +++ b/include/linux/kvm.h
> @@ -232,6 +232,7 @@ struct kvm_vapic_addr {
> #define KVM_CAP_SET_TSS_ADDR 4
> #define KVM_CAP_EXT_CPUID 5
> #define KVM_CAP_VAPIC 6
> +#define KVM_CAP_CLOCKSOURCE 7
>
> /*
> * ioctls for VM fds
>
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