lkml.org 
[lkml]   [2018]   [Apr]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v3 01/14] KVM: s390: refactor crypto initialization
From
Date


On 03/14/2018 07:25 PM, Tony Krowiak wrote:
> This patch refactors the code that initializes the crypto
> configuration for a guest. The crypto configuration is contained in
> a crypto control block (CRYCB) which is a satellite control block to
> our main hardware virtualization control block. The CRYCB is
> attached to the main virtualization control block via a CRYCB
> designation (CRYCBD) designation field containing the address of
> the CRYCB as well as its format.
>
> Prior to the introduction of AP device virtualization, there was
> no need to provide access to or specify the format of the CRYCB for
> a guest unless the MSA extension 3 (MSAX3) facility was installed
> on the host system. With the introduction of AP device virtualization,
> the CRYCB and its format must be made accessible to the guest
> regardless of the presence of the MSAX3 facility.
>
> The crypto initialization code is restructured as follows:
>
> * A new compilation unit is introduced to contain all interfaces
> and data structures related to configuring a guest's CRYCB for
> both the refactoring of crypto initialization as well as all
> subsequent patches introducing AP virtualization support.
>
> * Currently, the asm code for querying the AP configuration is
> duplicated in the AP bus as well as in KVM. Since the KVM
> code was introduced, the AP bus has externalized the interface
> for querying the AP configuration. The KVM interface will be
> replaced with a call to the AP bus interface. Of course, this
> will be moved to the new compilation unit mentioned above.
>
> * An interface to format the CRYCBD field will be provided via
> the new compilation unit and called from the KVM vm
> initialization.
>
> Signed-off-by: Tony Krowiak <akrowiak@linux.vnet.ibm.com>
> ---
> MAINTAINERS | 10 ++++++
> arch/s390/include/asm/kvm-ap.h | 16 ++++++++++
> arch/s390/include/asm/kvm_host.h | 1 +
> arch/s390/kvm/Kconfig | 1 +
> arch/s390/kvm/Makefile | 2 +-
> arch/s390/kvm/kvm-ap.c | 48 +++++++++++++++++++++++++++++
> arch/s390/kvm/kvm-s390.c | 61 ++++---------------------------------
> 7 files changed, 84 insertions(+), 55 deletions(-)
> create mode 100644 arch/s390/include/asm/kvm-ap.h
> create mode 100644 arch/s390/kvm/kvm-ap.c
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 0ec5881..72742d5 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -11875,6 +11875,16 @@ W: http://www.ibm.com/developerworks/linux/linux390/
> S: Supported
> F: drivers/s390/crypto/
>
> +S390 VFIO AP DRIVER
> +M: Tony Krowiak <akrowiak@linux.vnet.ibm.com>
> +M: Christian Borntraeger <borntraeger@de.ibm.com>
> +M: Martin Schwidefsky <schwidefsky@de.ibm.com>
> +L: linux-s390@vger.kernel.org
> +W: http://www.ibm.com/developerworks/linux/linux390/
> +S: Supported
> +F: arch/s390/include/asm/kvm/kvm-ap.h
> +F: arch/s390/kvm/kvm-ap.c
> +
> S390 ZFCP DRIVER
> M: Steffen Maier <maier@linux.vnet.ibm.com>
> M: Benjamin Block <bblock@linux.vnet.ibm.com>


The Maintainers update belongs into a different patch (e.g. when you introduce
drivers/s390/crypto/vfio_ap_drv.c )

\
 
 \ /
  Last update: 2018-04-05 12:43    [W:0.350 / U:15.212 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site