[kvmtool,v4,0/8] arm64: Pointer Authentication and SVE support

Message

Dave Martin June 7, 2019, 11:26 a.m. UTC

This series, based on kvmtool master [1], implements basic support for
pointer authentication and SVE for guests.  This superseded the
previous v3 series [2].

A git tree is also available [3].

For pointer auth, I include Amit's v10 patch [4], with some additional
refactoring to sit nicely alongside SVE, and some cosmetic / diagnostic
tidyups discussed during review on-list.  (I've kept the extra changes
separate for easier review, but they could be folded if desired.)

[Maintainer note: I'd like Amit to comment on my changes on top of his
pointer auth patch so that that can be folded together as appropriate.]


This series has been tested against Linux v5.2-rc1.

After discussion with Will, the command-line options for controlling
pointer auth and SVE support have all been dropped, since they are not
useful to normal users: instead, we just default to the best
configuration that the host supports.  There's always the option to add
this functionality back in some more appropriate form later, if someone
has a use for it.

See the individual patches for other minor changes.

[1] 
git://git.kernel.org/pub/scm/linux/kernel/git/will/kvmtool.git master
https://git.kernel.org/pub/scm/linux/kernel/git/will/kvmtool.git/log/
eaeaf60808d6 ("virtio/blk: Avoid taking pointer to packed struct")

[2] [PATCH kvmtool v3 0/9] arm64: Pointer Authentication and SVE support
https://lists.cs.columbia.edu/pipermail/kvmarm/2019-May/036050.html

[3] [PATCH v10 3/5] KVM: arm64: Add userspace flag to enable pointer authentication
https://lore.kernel.org/linux-arm-kernel/[e-mail]/

[4]
git://linux-arm.org/kvmtool-dm.git sve/v4/head
http://linux-arm.org/git?p=kvmtool-dm.git;a=shortlog;h=refs/heads/sve/v4/head


Amit Daniel Kachhap (1):
  KVM: arm/arm64: Add a vcpu feature for pointer authentication

Dave Martin (7):
  update_headers.sh: Add missing shell quoting
  update_headers.sh: Cleanly report failure on error
  update_headers.sh: arm64: Copy sve_context.h if available
  update_headers: Sync kvm UAPI headers with linux v5.2-rc1
  KVM: arm/arm64: Back out ptrauth command-line arguments
  arm/arm64: Factor out ptrauth vcpu feature setup
  arm64: Add SVE support

 arm/aarch32/include/kvm/kvm-cpu-arch.h |  7 +++++
 arm/aarch64/include/asm/kvm.h          | 43 +++++++++++++++++++++++++++
 arm/aarch64/include/asm/sve_context.h  | 53 ++++++++++++++++++++++++++++++++++
 arm/aarch64/include/kvm/kvm-cpu-arch.h |  3 ++
 arm/aarch64/kvm-cpu.c                  | 28 ++++++++++++++++++
 arm/kvm-cpu.c                          |  5 ++++
 include/linux/kvm.h                    | 15 ++++++++--
 powerpc/include/asm/kvm.h              | 48 ++++++++++++++++++++++++++++++
 util/update_headers.sh                 | 26 +++++++++++++----
 x86/include/asm/kvm.h                  |  1 +
 10 files changed, 221 insertions(+), 8 deletions(-)
 create mode 100644 arm/aarch64/include/asm/sve_context.h

Comments

Will Deacon July 3, 2019, 9:35 a.m. UTC | #1

On Fri, Jun 07, 2019 at 12:26:21PM +0100, Dave Martin wrote:
> This series, based on kvmtool master [1], implements basic support for
> pointer authentication and SVE for guests.  This superseded the
> previous v3 series [2].

I'd prefer to use the release headers for 5.2, so I've taken the first three
patches for now, but I'll wait for you to repost once 5.2 is out before I
take the rest.

Thanks,

Will

Dave Martin July 3, 2019, 11:07 a.m. UTC | #2

On Wed, Jul 03, 2019 at 10:35:37AM +0100, Will Deacon wrote:
> On Fri, Jun 07, 2019 at 12:26:21PM +0100, Dave Martin wrote:
> > This series, based on kvmtool master [1], implements basic support for
> > pointer authentication and SVE for guests.  This superseded the
> > previous v3 series [2].
> 
> I'd prefer to use the release headers for 5.2, so I've taken the first three
> patches for now, but I'll wait for you to repost once 5.2 is out before I
> take the rest.

Ack 

Cheers
---Dave