Re: [Part1 PATCH v4 17/17] X86/KVM: Clear encryption attribute when SEV is active

[Borislav Petkov]

On Sat, Sep 16, 2017 at 07:34:18AM -0500, Brijesh Singh wrote:
> The guest physical memory area holding the struct pvclock_wall_clock and
> struct pvclock_vcpu_time_info are shared with the hypervisor. Hypervisor

						the hypervisor. It ...

> periodically updates the contents of the memory. When SEV is active, we
> must clear the encryption attributes from the shared memory pages so that
> both hypervisor and guest can access the data.
> 
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
> Cc: Borislav Petkov <bp@xxxxxxx>
> Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
> Cc: "Radim KrÄmÃÅ" <rkrcmar@xxxxxxxxxx>
> Cc: Tom Lendacky <thomas.lendacky@xxxxxxx>
> Cc: x86@xxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Cc: kvm@xxxxxxxxxxxxxxx
> Signed-off-by: Brijesh Singh <brijesh.singh@xxxxxxx>
> ---
>  arch/x86/entry/vdso/vma.c  |  5 ++--
>  arch/x86/kernel/kvmclock.c | 65 ++++++++++++++++++++++++++++++++++++++--------
>  2 files changed, 57 insertions(+), 13 deletions(-)

Otherwise:

Reviewed-by: Borislav Petkov <bp@xxxxxxx>

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix ImendÃrffer, Jane Smithard, Graham Norton, HRB 21284 (AG NÃrnberg)
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