From: Marcelo Tosatti <mtosatti@redhat.com>
To: Sheng Yang <sheng@linux.intel.com>
Cc: Avi Kivity <avi@redhat.com>, Jan Kiszka <jan.kiszka@siemens.com>,
Joerg Roedel <joerg.roedel@amd.com>,
kvm@vger.kernel.org, "Yaozu (Eddie) Dong" <eddie.dong@intel.com>
Subject: Re: [PATCH v6 1/2] KVM: VMX: Execute WBINVD to keep data consistency with assigned devices
Date: Wed, 30 Jun 2010 13:34:51 -0300 [thread overview]
Message-ID: <20100630163451.GA1628@amt.cnet> (raw)
In-Reply-To: <1277871916-8348-1-git-send-email-sheng@linux.intel.com>
On Wed, Jun 30, 2010 at 12:25:15PM +0800, Sheng Yang wrote:
> Some guest device driver may leverage the "Non-Snoop" I/O, and explicitly
> WBINVD or CLFLUSH to a RAM space. Since migration may occur before WBINVD or
> CLFLUSH, we need to maintain data consistency either by:
> 1: flushing cache (wbinvd) when the guest is scheduled out if there is no
> wbinvd exit, or
> 2: execute wbinvd on all dirty physical CPUs when guest wbinvd exits.
>
> Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
> Signed-off-by: Sheng Yang <sheng@linux.intel.com>
> ---
> arch/x86/include/asm/kvm_host.h | 6 +++++
> arch/x86/kvm/emulate.c | 5 +++-
> arch/x86/kvm/svm.c | 7 ++++++
> arch/x86/kvm/vmx.c | 10 ++++++++-
> arch/x86/kvm/x86.c | 41 +++++++++++++++++++++++++++++++++++++++
> 5 files changed, 67 insertions(+), 2 deletions(-)
Applied, thanks.
.
prev parent reply other threads:[~2010-06-30 17:03 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-30 4:25 [PATCH v6 1/2] KVM: VMX: Execute WBINVD to keep data consistency with assigned devices Sheng Yang
2010-06-30 4:25 ` [PATCH v6 2/2] KVM: Using workqueue for WBINVD Sheng Yang
2010-06-30 16:41 ` Marcelo Tosatti
2010-06-30 16:34 ` Marcelo Tosatti [this message]
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