linux-kernel - [PATCH v2 0/6] VMware hypercalls enhancements

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Message-Id: <20231201232452.220355-1-amakhalov@vmware.com>
Date:   Fri,  1 Dec 2023 15:24:46 -0800
From:   Alexey Makhalov <amakhalov@...are.com>
To:     linux-kernel@...r.kernel.org, virtualization@...ts.linux.dev,
        hpa@...or.com, dave.hansen@...ux.intel.co, bp@...en8.d,
        mingo@...hat.com, tglx@...utronix.de
Cc:     x86@...nel.org, netdev@...r.kernel.org, richardcochran@...il.com,
        linux-input@...r.kernel.org, dmitry.torokhov@...il.com,
        zackr@...are.com, linux-graphics-maintainer@...are.com,
        pv-drivers@...are.com, namit@...are.com, timothym@...are.com,
        akaher@...are.com, jsipek@...are.com,
        dri-devel@...ts.freedesktop.org, daniel@...ll.ch,
        airlied@...il.com, tzimmermann@...e.de, mripard@...nel.org,
        maarten.lankhorst@...ux.intel.com, horms@...nel.org
Subject: [PATCH v2 0/6] VMware hypercalls enhancements

From: Alexey Makhalov <alexey.amakhalov@...adcom.com>

VMware hypercalls invocations were all spread out across the kernel
implementing same ABI as in-place asm-inline. With encrypted memory
and confidential computing it became harder to maintain every changes
in these hypercall implementations.

Intention of this patchset is to introduce arch independent VMware
hypercall API layer other subsystems such as device drivers can call
to, while hiding architecture specific implementation behind.

Second patch introduces the vmware_hypercall low and high bandwidth
families of functions, with little enhancements there.
Sixth patch adds tdx hypercall support

arm64 implementation of vmware_hypercalls is in drivers/gpu/drm/
vmwgfx/vmwgfx_msg_arm64.h and going to be moved to arch/arm64 with
a separate patchset with the introduction of VMware Linux guest
support for arm64.

No functional changes in drivers/input/mouse/vmmouse.c and
drivers/ptp/ptp_vmw.c

v1->v2 changes (no functional changes):
- Improved commit message in patches 2 and 5.
- Added Reviewed-by for all patches.
- Added Ack from Dmitry Torokhov in patch 4. No fixes regarding reported
  by Simon Horman gcc error in this patch.

x86 maintainers, please consider merging this patch set in your branch. 

Alexey Makhalov (6):
  x86/vmware: Move common macros to vmware.h
  x86/vmware: Introduce vmware_hypercall API
  ptp/vmware: Use vmware_hypercall API
  input/vmmouse: Use vmware_hypercall API
  drm/vmwgfx: Use vmware_hypercall API
  x86/vmware: Add TDX hypercall support

 arch/x86/include/asm/vmware.h             | 327 ++++++++++++++++++++--
 arch/x86/kernel/cpu/vmware.c              | 101 ++-----
 drivers/gpu/drm/vmwgfx/vmwgfx_msg.c       | 173 ++++--------
 drivers/gpu/drm/vmwgfx/vmwgfx_msg_arm64.h | 197 +++++++++----
 drivers/gpu/drm/vmwgfx/vmwgfx_msg_x86.h   | 185 ------------
 drivers/input/mouse/vmmouse.c             |  76 ++---
 drivers/ptp/ptp_vmw.c                     |  12 +-
 7 files changed, 551 insertions(+), 520 deletions(-)

-- 
2.39.0