linux-kernel - Re: [PATCH 2/4 V11] Add functions to check if the host has stopped the vm

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Message-ID: <20120207185614.GA19800@amt.cnet>
Date:	Tue, 7 Feb 2012 16:56:14 -0200
From:	Marcelo Tosatti <mtosatti@...hat.com>
To:	Eric B Munson <emunson@...bm.net>
Cc:	avi@...hat.com, mingo@...hat.com, hpa@...or.com,
	ryanh@...ux.vnet.ibm.com, aliguori@...ibm.com, kvm@...r.kernel.org,
	linux-arch@...r.kernel.org, x86@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4 V11] Add functions to check if the host has stopped
 the vm

On Tue, Jan 31, 2012 at 10:35:30AM -0500, Eric B Munson wrote:
> When a host stops or suspends a VM it will set a flag to show this.  The
> watchdog will use these functions to determine if a softlockup is real, or the
> result of a suspended VM.
> 
> Signed-off-by: Eric B Munson <emunson@...bm.net>
> asm-generic changes Acked-by: Arnd Bergmann <arnd@...db.de>
> Cc: mingo@...hat.com
> Cc: hpa@...or.com
> Cc: ryanh@...ux.vnet.ibm.com
> Cc: aliguori@...ibm.com
> Cc: mtosatti@...hat.com
> Cc: kvm@...r.kernel.org
> Cc: linux-arch@...r.kernel.org
> Cc: x86@...nel.org
> Cc: linux-kernel@...r.kernel.org
> ---
> Changes from V6:
>  Use __this_cpu_and when clearing the PVCLOCK_GUEST_STOPPED flag
> Changes from V5:
>  Collapse generic stubs into this patch
>  check_and_clear_guest_stopped() takes no args and uses __get_cpu_var()
>  Include individual definitions in ia64, s390, and powerpc
> 
>  arch/ia64/include/asm/kvm_para.h    |    5 +++++
>  arch/powerpc/include/asm/kvm_para.h |    5 +++++
>  arch/s390/include/asm/kvm_para.h    |    5 +++++
>  arch/x86/include/asm/kvm_para.h     |    8 ++++++++
>  arch/x86/kernel/kvmclock.c          |   21 +++++++++++++++++++++
>  5 files changed, 44 insertions(+), 0 deletions(-)

Where is the check_and_clear_guest_stopped() stub in
asm-generic/kvm_para.h? I think it is necessary for 
other architectures.


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