linux-kernel - Re: [PATCH 4/4] KVM: nVMX: initialize more non-shadowed fields in prepare_vmcs02

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Date:   Mon, 25 Dec 2017 11:09:07 +0800
From:   Wanpeng Li <kernellwp@...il.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     linux-kernel@...r.kernel.org, kvm <kvm@...r.kernel.org>
Subject: Re: [PATCH 4/4] KVM: nVMX: initialize more non-shadowed fields in prepare_vmcs02_full

2017-12-21 20:43 GMT+08:00 Paolo Bonzini <pbonzini@...hat.com>:
> These fields are also simple copies of the data in the vmcs12 struct.
> For some of them, prepare_vmcs02 was skipping the copy when the field
> was unused.  In prepare_vmcs02_full, we copy them always as long as the
> field exists on the host, because the corresponding execution control
> might be one of the shadowed fields.

Why we don't need to copy them always before the patchset?

Regards,
Wanpeng Li