Currently, KVM ARM/ARM64 only provides in-kernel emulation of Power State
and Coordination Interface (PSCI) v0.1.
This patchset aims at providing newer PSCI v0.2 for KVM ARM/ARM64 VCPUs
such that it does not break current KVM ARM/ARM64 ABI. Also, the patchset
provides emulation of only few PSCI v0.2 functions such as PSCI_VERSION,
CPU_ON, and CPU_OFF. Emulation of other PSCI v0.2 functions will be added
later.
The user space tools (i.e. QEMU or KVMTOOL) will have to explicitly enable
KVM_ARM_VCPU_PSCI_0_2 feature using KVM_ARM_VCPU_INIT ioctl for providing
PSCI v0.2 to VCPUs.
Anup Patel (3):
KVM: Add capability to advertise PSCI v0.2 support
ARM/ARM64: KVM: Add support for PSCI v0.2 emulation
KVM: Documentation: Add info regarding KVM_ARM_VCPU_PSCI_0_2 feature
Documentation/virtual/kvm/api.txt | 2 +
arch/arm/include/asm/kvm_host.h | 2 +-
arch/arm/include/uapi/asm/kvm.h | 39 ++++++++++++++++--
arch/arm/kvm/arm.c | 6 ++-
arch/arm/kvm/psci.c | 79 ++++++++++++++++++++++++++++++-------
arch/arm64/include/asm/kvm_host.h | 2 +-
arch/arm64/include/uapi/asm/kvm.h | 39 ++++++++++++++++--
include/uapi/linux/kvm.h | 1 +
8 files changed, 146 insertions(+), 24 deletions(-)
--
1.7.9.5
Patchsets related to hibernation resume:
- enhancement to make the use of an existing resume file more general
- enhance name_to_dev_t to ignore trailing newlines coming from userspace.
Both patches are based on the 3.12-rc3 tag. This was tested on a
Pandaboard with partial hibernation support, and compiled for x86.
[PATCH 1/2] init/do_mounts.c: ignore final \n in name_to_dev_t
init/do_mounts.c | 23 ++++++++++++++++++-----
1 file changed, 18 insertions(+), 5 deletions(-)
Changes name_to_dev_t to handle a trailing newline in the
input buffer, which will allow name_to_dev_t to be used
directly with user buffers without requiring a copy.
Also adds a const to the name parameter which reflects
how name_to_dev_t is treating the input buffer currently.
This also allows direct use of user buffers
(from resume_store for example).
[PATCH 2/2] PM / Hibernate: use name_to_dev_t to parse resume
kernel/power/hibernate.c | 15 ++++-----------
1 file changed, 4 insertions(+), 11 deletions(-)
Use name_to_dev_t to parse the /sys/power/resume file making the
syntax more flexible. It supports the previous use syntax
and additionally can support other formats such as
/dev/devicenode and UUID= formats.
By changing /sys/debug/resume to accept the same syntax as
the resume=device parameter, we can parse the resume=device
in the initrd init script and use the resume device directly
from the kernel command line.
Changes in v3:
--------------
* Dropped documentation patch as it went in through trivial
* Added patch for name_to_dev_t to support directly parsing userspace
buffer
Changes in v2:
--------------
* Added check for null return of kstrndup in hibernate.c
Thanks,
Sebastian
