From: anup.patel@linaro.org (Anup Patel)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v8 00/12] In-kernel PSCI v0.2 emulation for KVM ARM/ARM64
Date: Thu, 3 Apr 2014 14:35:37 +0530 [thread overview]
Message-ID: <1396515949-1459-1-git-send-email-anup.patel@linaro.org> (raw)
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.
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.
Changlog:
V8:
- Add #define for possible values of migrate type in uapi/linux/psci.h
- Simplified psci_affinity_mask() in psci.c
- Update comments in kvm_psci_vcpu_suspend() to indicate that for KVM
wakeup events are interrupts.
- Unconditionally update r0 (or x0) in kvm_psci_vcpu_on()
V7:
- Make uapi/linux/psci.h inline with Ashwin's patch
http://www.spinics.net/lists/arm-kernel/msg319090.html
- Incorporate Rob's suggestions for uapi/linux/psci.h
- Treat CPU_SUSPEND power-down request to be same as standby
request. This further simplifies CPU_SUSPEND emulation.
V6:
- Introduce uapi/linux/psci.h for sharing PSCI defines between
ARM kernel, ARM64 kernel, KVM ARM/ARM64 and user space
- Make CPU_SUSPEND emulation similar to WFI emulation
V5:
- Have separate last patch to advertise KVM_CAP_ARM_PSCI_0_2
- Use kvm_psci_version() in kvm_psci_vcpu_on()
- Return ALREADY_ON for PSCI v0.2 CPU_ON if VCPU is not paused
- Remove per-VCPU suspend context
- As-per PSCI v0.2 spec, only current CPU can suspend itself
V4:
- Implement all mandatory functions required by PSCI v0.2
V3:
- Make KVM_ARM_VCPU_PSCI_0_2 feature experiementatl for now so that
it fails for user space till all mandatory PSCI v0.2 functions are
emulated by KVM ARM/ARM64
- Have separate patch for making KVM_ARM_VCPU_PSCI_0_2 feature available
to user space. This patch can be defferred for now
V2:
- Don't rename PSCI return values KVM_PSCI_RET_NI and KVM_PSCI_RET_INVAL
- Added kvm_psci_version() to get PSCI version available to VCPU
- Fixed grammer in Documentation/virtual/kvm/api.txt
V1:
- Initial RFC PATCH
Anup Patel (12):
KVM: Add capability to advertise PSCI v0.2 support
ARM/ARM64: KVM: Add common header for PSCI related defines
ARM/ARM64: KVM: Add base for PSCI v0.2 emulation
KVM: Documentation: Add info regarding KVM_ARM_VCPU_PSCI_0_2 feature
ARM/ARM64: KVM: Make kvm_psci_call() return convention more flexible
KVM: Add KVM_EXIT_SYSTEM_EVENT to user space API header
ARM/ARM64: KVM: Emulate PSCI v0.2 SYSTEM_OFF and SYSTEM_RESET
ARM/ARM64: KVM: Emulate PSCI v0.2 AFFINITY_INFO
ARM/ARM64: KVM: Emulate PSCI v0.2 MIGRATE_INFO_TYPE and related
functions
ARM/ARM64: KVM: Fix CPU_ON emulation for PSCI v0.2
ARM/ARM64: KVM: Emulate PSCI v0.2 CPU_SUSPEND
ARM/ARM64: KVM: Advertise KVM_CAP_ARM_PSCI_0_2 to user space
Documentation/virtual/kvm/api.txt | 17 +++
arch/arm/include/asm/kvm_host.h | 2 +-
arch/arm/include/asm/kvm_psci.h | 6 +-
arch/arm/include/uapi/asm/kvm.h | 19 ++--
arch/arm/kvm/arm.c | 1 +
arch/arm/kvm/handle_exit.c | 10 +-
arch/arm/kvm/psci.c | 222 +++++++++++++++++++++++++++++++++----
arch/arm64/include/asm/kvm_host.h | 2 +-
arch/arm64/include/asm/kvm_psci.h | 6 +-
arch/arm64/include/uapi/asm/kvm.h | 21 ++--
arch/arm64/kvm/handle_exit.c | 10 +-
include/uapi/linux/Kbuild | 1 +
include/uapi/linux/kvm.h | 9 ++
include/uapi/linux/psci.h | 77 +++++++++++++
14 files changed, 355 insertions(+), 48 deletions(-)
create mode 100644 include/uapi/linux/psci.h
--
1.7.9.5
next reply other threads:[~2014-04-03 9:05 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-03 9:05 Anup Patel [this message]
2014-04-03 9:05 ` [PATCH v8 01/12] KVM: Add capability to advertise PSCI v0.2 support Anup Patel
2014-04-03 9:05 ` [PATCH v8 02/12] ARM/ARM64: KVM: Add common header for PSCI related defines Anup Patel
2014-04-14 18:28 ` Ashwin Chaugule
2014-04-15 3:43 ` Anup Patel
2014-04-03 9:05 ` [PATCH v8 03/12] ARM/ARM64: KVM: Add base for PSCI v0.2 emulation Anup Patel
2014-04-03 9:05 ` [PATCH v8 04/12] KVM: Documentation: Add info regarding KVM_ARM_VCPU_PSCI_0_2 feature Anup Patel
2014-04-03 9:05 ` [PATCH v8 05/12] ARM/ARM64: KVM: Make kvm_psci_call() return convention more flexible Anup Patel
2014-04-03 9:05 ` [PATCH v8 06/12] KVM: Add KVM_EXIT_SYSTEM_EVENT to user space API header Anup Patel
2014-04-03 9:05 ` [PATCH v8 07/12] ARM/ARM64: KVM: Emulate PSCI v0.2 SYSTEM_OFF and SYSTEM_RESET Anup Patel
2014-04-03 9:05 ` [PATCH v8 08/12] ARM/ARM64: KVM: Emulate PSCI v0.2 AFFINITY_INFO Anup Patel
2014-04-03 9:05 ` [PATCH v8 09/12] ARM/ARM64: KVM: Emulate PSCI v0.2 MIGRATE_INFO_TYPE and related functions Anup Patel
2014-04-03 9:05 ` [PATCH v8 10/12] ARM/ARM64: KVM: Fix CPU_ON emulation for PSCI v0.2 Anup Patel
2014-04-03 9:05 ` [PATCH v8 11/12] ARM/ARM64: KVM: Emulate PSCI v0.2 CPU_SUSPEND Anup Patel
2014-04-03 9:05 ` [PATCH v8 12/12] ARM/ARM64: KVM: Advertise KVM_CAP_ARM_PSCI_0_2 to user space Anup Patel
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