Re: [Part2 PATCH v5 18/31] KVM: SVM: VMRUN should use assosiated ASID when SEV is enabled

[Borislav Petkov <bp@alien8.de>]

On Wed, Oct 04, 2017 at 08:13:59AM -0500, Brijesh Singh wrote:
> SEV hardware uses ASIDs to associate memory encryption key with the
> guest VM. During the guest creation time, SEV VM use SEV_CMD_ACTIVATE
> command to bind a particular ASID to the guest. Lets make sure that the
> VMCB is programmed with the bound ASID before a VMRUN.

Some minor corrections:

"SEV hardware uses ASIDs to associate a memory encryption key with a
guest VM. During guest creation, a SEV VM uses the SEV_CMD_ACTIVATE
command to bind a particular ASID to the guest. Lets make sure that the
VMCB is programmed with the bound ASID before a VMRUN."

> 
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: "H. Peter Anvin" <hpa@zytor.com>
> Cc: Paolo Bonzini <pbonzini@redhat.com>
> Cc: "Radim Krčmář" <rkrcmar@redhat.com>
> Cc: Joerg Roedel <joro@8bytes.org>
> Cc: Borislav Petkov <bp@suse.de>
> Cc: Tom Lendacky <thomas.lendacky@amd.com>
> Cc: x86@kernel.org
> Cc: kvm@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
> ---
>  arch/x86/kvm/svm.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++--
>  1 file changed, 56 insertions(+), 2 deletions(-)

With that:

Reviewed-by: Borislav Petkov <bp@suse.de>

-- 
Regards/Gruss,
    Boris.

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