linux-kernel - Re: [PATCH RFC V11 15/18] kvm : Paravirtual ticketlocks support for linux guests running on KVM hypervisor

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Message-ID: <930127352.9647991.1375713916924.JavaMail.root@redhat.com>
Date:	Mon, 5 Aug 2013 10:45:16 -0400 (EDT)
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>
Cc:	Gleb Natapov <gleb@...hat.com>, Ingo Molnar <mingo@...nel.org>,
	mingo@...hat.com, x86@...nel.org, tglx@...utronix.de,
	jeremy@...p.org, konrad wilk <konrad.wilk@...cle.com>,
	hpa@...or.com, linux-doc@...r.kernel.org,
	habanero@...ux.vnet.ibm.com, xen-devel@...ts.xensource.com,
	peterz@...radead.org, mtosatti@...hat.com,
	stefano stabellini <stefano.stabellini@...citrix.com>,
	andi@...stfloor.org, attilio rao <attilio.rao@...rix.com>,
	ouyang@...pitt.edu, gregkh@...e.de, agraf@...e.de,
	chegu vinod <chegu_vinod@...com>,
	torvalds@...ux-foundation.org, avi kivity <avi.kivity@...il.com>,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org, riel@...hat.com,
	drjones@...hat.com, virtualization@...ts.linux-foundation.org,
	srivatsa vaddagiri <srivatsa.vaddagiri@...il.com>
Subject: Re: [PATCH RFC V11 15/18] kvm : Paravirtual ticketlocks support for
 linux guests running on KVM hypervisor

> Only thing I am thinking is about KVM_FEATURE_PV_UNHALT, and
> KVM_HC_KICK_CPU definition in the below hunk, that is needed by guest
> as well. may be this header file change can be a separate patch so that
> duplicate can be handled easily during merge?

Sure, good idea.

Paolo

> I do testing of all combination after splitting and post.

> diff --git a/arch/x86/include/uapi/asm/kvm_para.h
> b/arch/x86/include/uapi/asm/kvm_para.h
> index 06fdbd9..94dc8ca 100644
> --- a/arch/x86/include/uapi/asm/kvm_para.h
> +++ b/arch/x86/include/uapi/asm/kvm_para.h
> @@ -23,6 +23,7 @@
>   #define KVM_FEATURE_ASYNC_PF           4
>   #define KVM_FEATURE_STEAL_TIME         5
>   #define KVM_FEATURE_PV_EOI             6
> +#define KVM_FEATURE_PV_UNHALT          7
> 
> diff --git a/include/uapi/linux/kvm_para.h b/include/uapi/linux/kvm_para.h
> index cea2c5c..2841f86 100644
> --- a/include/uapi/linux/kvm_para.h
> +++ b/include/uapi/linux/kvm_para.h
> @@ -19,6 +19,7 @@
>   #define KVM_HC_MMU_OP                  2
>   #define KVM_HC_FEATURES                        3
>   #define KVM_HC_PPC_MAP_MAGIC_PAGE      4
> +#define KVM_HC_KICK_CPU                        5
> 
> 
> 
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