From: Paolo Bonzini <pbonzini@redhat.com>
To: zhanghailiang <zhang.zhanghailiang@huawei.com>,
Stefan Fritsch <sf@sfritsch.de>
Cc: hangaohuai@huawei.com, kvm@vger.kernel.org, gleb@kernel.org,
peter.huangpeng@huawei.com
Subject: Re: [PATCH] KVM: add KVM_CAP_VMX_APICV to advertise hardware apic-v support
Date: Thu, 18 Dec 2014 09:30:15 +0100 [thread overview]
Message-ID: <54929097.4000806@redhat.com> (raw)
In-Reply-To: <54924BE2.7070806@huawei.com>
On 18/12/2014 04:37, zhanghailiang wrote:
>> set this bit. But the HV_X64_APIC_ACCESS_RECOMMENDED bit should
>> probably not be set if the host supports apic-v. I havn't done any
>
> That is what this patch want to do ;)
This would cause a guest ABI change upon migration from APICv to
non-APICv hosts, so it is not possible. Perhaps we need to set bit 8
but not bit 3.
Paolo
next prev parent reply other threads:[~2014-12-18 8:30 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-11 8:07 [PATCH] KVM: add KVM_CAP_VMX_APICV to advertise hardware apic-v support zhanghailiang
2014-12-11 11:48 ` Paolo Bonzini
2014-12-11 12:53 ` zhanghailiang
2014-12-11 13:28 ` Radim Krčmář
2014-12-11 17:15 ` Paolo Bonzini
2014-12-17 22:17 ` Stefan Fritsch
2014-12-18 3:37 ` zhanghailiang
2014-12-18 8:30 ` Paolo Bonzini [this message]
2014-12-18 8:57 ` Stefan Fritsch
2014-12-18 9:23 ` Paolo Bonzini
2014-12-11 13:08 ` Radim Krčmář
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