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From: Sebastian Ene <sebastianene@google.com>
To: kvm@vger.kernel.org
Cc: maz@kernel.org, will@kernel.org, kvmarm@lists.cs.columbia.edu
Subject: [PATCH kvmtool v5 0/3] aarch64: Add stolen time support
Date: Fri, 25 Feb 2022 13:37:41 +0000	[thread overview]
Message-ID: <20220225133743.41207-1-sebastianene@google.com> (raw)

These patches add support for stolen time functionality.

Patch #1 moves the vCPU structure initialisation before the target->init()
call to allow early access to the kvm structure from the vCPU
during target->init().

Patch #2 modifies the memory layout in arm-common/kvm-arch.h and adds a
new MMIO device PVTIME after the RTC region. A new flag is added in
kvm-config.h that will be used to control [enable/disable] the pvtime
functionality.

Patch #3 adds a new command line argument to disable the stolen time
functionality(by default is enabled).

Changelog since v4:
 - Propagate a return code from kvm_cpu__setup_pvtime to target->init(vcpu)
 - Change the order of the patches as the vCPU structure initialisation
   needs to be done before the PVTIME setup
 - Return -errno from pvtime__alloc_region(..)
 - Verify if the system supports KVM_CAP_STEAL_TIME

Sebastian Ene (3):
  aarch64: Populate the vCPU struct before target->init()
  aarch64: Add stolen time support
  Add --no-pvtime command line argument

 Makefile                               |  1 +
 arm/aarch64/arm-cpu.c                  |  2 +-
 arm/aarch64/include/kvm/kvm-cpu-arch.h |  1 +
 arm/aarch64/pvtime.c                   | 98 ++++++++++++++++++++++++++
 arm/include/arm-common/kvm-arch.h      |  6 +-
 arm/kvm-cpu.c                          | 14 ++--
 builtin-run.c                          |  2 +
 include/kvm/kvm-config.h               |  1 +
 8 files changed, 116 insertions(+), 9 deletions(-)
 create mode 100644 arm/aarch64/pvtime.c

-- 
2.35.1.574.g5d30c73bfb-goog

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             reply	other threads:[~2022-02-25 13:38 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-25 13:37 Sebastian Ene [this message]
2022-02-25 13:37 ` [PATCH kvmtool v5 1/3] aarch64: Populate the vCPU struct before target->init() Sebastian Ene
2022-02-25 13:37 ` [PATCH kvmtool v5 2/3] aarch64: Add stolen time support Sebastian Ene
2022-02-25 13:37 ` [PATCH kvmtool v5 3/3] Add --no-pvtime command line argument Sebastian Ene

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