Re: [PATCH RFC v7 02/64] KVM: x86: Add KVM_CAP_UNMAPPED_PRIVATE_MEMORY

From: Borislav Petkov
Date: Thu Dec 22 2022 - 07:26:40 EST


On Wed, Dec 14, 2022 at 01:39:54PM -0600, Michael Roth wrote:
> This mainly indicates to KVM that it should expect all private guest
> memory to be backed by private memslots. Ideally this would work
> similarly for others archs, give or take a few additional flags, but
> for now it's a simple boolean indicator for x86.

...

> diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
> index c7e9d375a902..cc9424ccf9b2 100644
> --- a/include/uapi/linux/kvm.h
> +++ b/include/uapi/linux/kvm.h
> @@ -1219,6 +1219,7 @@ struct kvm_ppc_resize_hpt {
> #define KVM_CAP_DIRTY_LOG_RING_ACQ_REL 223
> #define KVM_CAP_S390_PROTECTED_ASYNC_DISABLE 224
> #define KVM_CAP_MEMORY_ATTRIBUTES 225
> +#define KVM_CAP_UNMAPPED_PRIVATE_MEM 240

Isn't this new cap supposed to be documented somewhere in
Documentation/virt/kvm/api.rst ?

--
Regards/Gruss,
Boris.

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