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 v11 0/3] aarch64: Add stolen time support
Date: Sun, 13 Mar 2022 16:19:47 +0000 [thread overview]
Message-ID: <20220313161949.3565171-1-sebastianene@google.com> (raw)
This series adds 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. Stolen time is enabled by default when the host
supports KVM_CAP_STEAL_TIME.
Patch #3 adds a new command line argument to disable the stolen time
functionality(by default is enabled).
Changelog since v10:
- set the return value to -errno on failed exit path from
'kvm_cpu__setup_pvtime'
Changelog since v9:
- use the `attr` field for the 'struct kvm_device_attr' initialisation
with KVM_ARM_VCPU_PVTIME_IPA instead of the `addr` field
Changelog since v8:
- fix an error caused by kvm_cpu__teardown_pvtime() not beeing defined
for aarch32
- cleanup the pvtime setup by removing the flag 'is_failed_cfg' and
drop the 'pvtime_data_priv' definition
- add missing Review-by tag
The patch has been tested on qemu-system-aarch64.
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/aarch32/include/kvm/kvm-cpu-arch.h | 5 ++
arm/aarch64/arm-cpu.c | 2 +-
arm/aarch64/include/kvm/kvm-cpu-arch.h | 2 +
arm/aarch64/pvtime.c | 98 ++++++++++++++++++++++++++
arm/include/arm-common/kvm-arch.h | 6 +-
arm/kvm-cpu.c | 15 ++--
builtin-run.c | 2 +
include/kvm/kvm-config.h | 1 +
9 files changed, 123 insertions(+), 9 deletions(-)
create mode 100644 arm/aarch64/pvtime.c
--
2.35.1.723.g4982287a31-goog
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next reply other threads:[~2022-03-13 16:20 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-13 16:19 Sebastian Ene [this message]
2022-03-13 16:19 ` [PATCH kvmtool v11 1/3] aarch64: Populate the vCPU struct before target->init() Sebastian Ene
2022-03-13 16:19 ` [PATCH kvmtool v11 2/3] aarch64: Add stolen time support Sebastian Ene
2022-03-13 16:19 ` [PATCH kvmtool v11 3/3] Add --no-pvtime command line argument Sebastian Ene
2022-03-21 13:57 ` [PATCH kvmtool v11 0/3] aarch64: Add stolen time support Will Deacon
2022-03-21 14:00 ` Will Deacon
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